CN110848795A

CN110848795A - Embedded air conditioner indoor unit

Info

Publication number: CN110848795A
Application number: CN201810846722.7A
Authority: CN
Inventors: 丁佳宏; 王哲元; 赵双双
Original assignee: Daikin Industries Ltd
Current assignee: Daikin Industries Ltd
Priority date: 2018-07-27
Filing date: 2018-07-27
Publication date: 2020-02-28
Anticipated expiration: 2038-07-27
Also published as: CN110848795B

Abstract

An embedded air conditioner indoor unit is helpful to prevent short-circuit airflow from forming between an air suction opening and an air outlet, and a user is not easy to see components in the indoor unit main body from the outside through the air suction opening. The embedded air-conditioning indoor unit comprises an indoor unit main body and a decoration panel, wherein the indoor unit main body is provided with a fan, the indoor unit main body or the decoration panel is provided with an air outlet, the decoration panel is provided with an air suction inlet, the air suction inlet is provided with a plurality of grids, more than two grids from the grid closest to the air outlet respectively have inclined parts inclined relative to the air suction plane where the air suction inlet is positioned, the inclined parts obliquely extend towards the direction far away from the air outlet by taking the end part of the grid close to the inner side of the indoor unit main body as a starting point, an acute angle is formed between the inclined parts and the air suction plane, and the acute angle of the inclined part of one grid of the more than two grids is larger than that of the inclined part of.

Description

Embedded air conditioner indoor unit

Technical Field

The invention relates to the field of air treatment, in particular to an embedded air conditioner indoor unit which is provided with an indoor unit main body and is arranged below or on the side of the indoor unit main body.

Background

In the past, there is an embedded air-conditioning indoor unit, which includes an indoor unit main body and a decoration panel disposed below or on a side of the indoor unit main body, the indoor unit main body is provided with a fan, a heat exchanger, a drain pan, a filter screen, and the like, the decoration panel has an air outlet and an air inlet, and the air inlet is provided with a plurality of grid bars.

However, in practice, it has been found that, in the case of the embedded air conditioning indoor unit with the above-described structure, when the distance between the suction opening and the outlet is short, short-circuit airflow is easily formed between the suction opening and the outlet, which results in poor working efficiency.

Disclosure of Invention

The present invention has been made to solve the above problems, and an object of the present invention is to provide an embedded air conditioning indoor unit, which helps to prevent a short-circuit airflow from being formed between an air suction opening and an air outlet, and makes it difficult for a user to see components inside the indoor unit main body through the air suction opening from the outside.

In order to achieve the above object, the present invention provides an embedded air conditioning indoor unit, including an indoor unit main body and a decoration panel disposed below or at a side of the indoor unit main body, the indoor unit main body is provided with a fan, the indoor unit main body or the decoration panel has an air outlet, and the decoration panel has an air suction opening, the air suction opening is provided with a plurality of grids, wherein, among the plurality of grids, two or more grids from the grid closest to the air outlet respectively have inclined portions inclined with respect to an air suction plane where the air suction opening is located, the inclined portions extend obliquely in a direction away from the air outlet with an end portion of the inclined portion closer to an inner side of the indoor unit main body as a starting point, the inclined portions form an acute angle with the air suction plane, and an acute angle of the inclined portion of one of the two or more grids is greater than an acute angle of the inclined portion of the other grid closer to the air outlet than the one grid.

According to the embedded air conditioner indoor unit of the present invention, in the plurality of grills, two or more grills from the grill closest to the air outlet respectively have inclined portions inclined with respect to the air suction plane where the air suction port is located, the inclined portions extend obliquely toward the direction away from the air outlet with their end portions close to the inner side of the indoor unit main body as starting points, and the acute angle of the inclined portion of one of the two or more grills is larger than the acute angle of the inclined portion of the other grill closer to the air outlet than the one grill, so that the flow resistance of the air flow flowing into the indoor unit main body from the side close to the air outlet is increased at the portion close to the air outlet of the air suction port as compared with the case where the grill does not have the inclined portion, which helps to prevent the short-circuit air flow from being formed between the air suction port and the air outlet, and the air flow can be prevented from all flowing toward the side close to the, the indoor unit has the advantages that the distribution of air flow in the indoor unit body is enabled to be uniform, noise is reduced, even if a user looks right above the part provided with the grid strip with the inclined part, the user is not easy to see parts in the indoor unit body from the outside through the air suction opening, and the influence on attractiveness due to dirtiness of the parts in the indoor unit body, such as a filter screen and the like, is avoided.

In the built-in air conditioning indoor unit according to the present invention, it is preferable that the decorative panel has the air suction opening and the air outlet opening that are provided on the same plane.

According to the embedded air conditioner indoor unit of the present invention, even if the air suction opening and the air outlet are disposed close to each other, the possibility of forming a short-circuit air flow between the air suction opening and the air outlet can be reduced by the inclined portion, thereby contributing to miniaturization; on the other hand, if the distance between the air suction opening and the air outlet is kept unchanged, the air outlet speed can be increased and the angle adjusting range of the air guide blade at the air outlet can be enlarged under the condition that short-circuit airflow is not formed between the air suction opening and the air outlet.

In addition, in the embedded air conditioner indoor unit with the structure, the following structure can be adopted: if the width spanned by the more than two grids is L0 and the distance between the air suction opening and the air outlet is L1, L0 is inversely proportional to L1.

According to the embedded air-conditioning indoor unit with the structure, the grid bars with the inclined parts can prevent short-circuit airflow from being formed between the air suction opening and the air outlet in a smaller arrangement range, so that the flow resistance of the airflow flowing into the indoor unit main body at the part of the air suction opening far away from the air outlet can be prevented from being increased due to the inclined parts arranged on the grid bars, and the air suction efficiency of the fan is improved.

In addition, in the embedded air conditioner indoor unit with the structure, the following structure can be adopted: the air outlet is equipped with wind-guiding blade, wind-guiding blade can be in the closure the state of air outlet with in order to dorsad the mode of inlet scoop is opened switch between the state of air outlet, if establish the width that two above bars were striden is L0 and establish and be in the biggest opening angle wind-guiding blade's front end with the distance between the inlet scoop is L2, then L0 and L2 are the inverse ratio.

According to the embedded air conditioner indoor unit with the structure, the air guide blade opens the air outlet in a mode of being back to the air suction opening, therefore, compared with the condition that the air guide blade opens the air outlet in a mode of being towards the air suction opening, even if the distance between the air suction opening and the air outlet is set to be smaller, short-circuit airflow is easily prevented from being formed between the air suction opening and the air outlet, and in the grid strip with the inclined part, the short-circuit airflow can be prevented from being formed between the air suction opening and the air outlet in a smaller setting range, therefore, the flowing resistance of the airflow flowing into the indoor unit main body at the part of the air suction opening far away from the air outlet can be prevented from being increased due to the inclined part arranged on the grid strip.

In the indoor unit of a built-in air conditioner according to the present invention, it is preferable that the two or more grills have an acute angle of the inclined portion that increases as the grill is farther from the outlet.

According to the embedded air conditioner indoor unit of the invention, in the air suction opening, the farther away from the air outlet, the smaller the resistance caused by the inclined part to the air flow flowing into the indoor unit main body, thereby being beneficial to improving the air suction efficiency of the fan.

In addition, in the embedded air conditioner indoor unit with the structure, the following structure can be adopted: in the two or more grills, a difference between acute angles of the inclined portions of two adjacent grills is a fixed value.

The embedded air conditioner indoor unit with the structure is beneficial to enabling the distribution of the air flow sucked into the indoor unit main body from the air suction opening to be uniform and reducing noise.

In the indoor unit of a built-in air conditioner according to the present invention, it is preferable that the two or more grills are divided into a plurality of grill groups, the acute angle of the inclined portion of the grill is the same for each of the grill groups, and the acute angle of the inclined portion of the grill is larger for the grill group farther from the outlet in the two adjacent grill groups.

The embedded air conditioner indoor unit is beneficial to simplifying the manufacturing difficulty of the decoration panel and reducing the manufacturing cost.

In addition, in the embedded air conditioner indoor unit with the structure, the following structure can be adopted: the difference between the acute angles of the inclined portions of the grid bars of the adjacent grid bar groups is a fixed value.

The embedded air conditioner indoor unit with the structure is beneficial to enabling the distribution of the air flow flowing into the indoor unit main body from the air suction opening to be uniform and reducing noise.

In the indoor unit of a built-in air conditioner according to the present invention, the acute angle is preferably not less than 25 °.

According to the embedded air conditioner indoor unit, the flow resistance of the air flow flowing into the indoor unit body from the air suction opening is prevented from being too large due to the fact that the acute angle of the inclined part is too large, and accordingly large noise is generated.

In the indoor unit of a built-in air conditioner according to the present invention, it is preferable that the fan is a centrifugal fan, the plurality of louvers are divided into a plurality of louver groups including a first louver group that is closer to the outlet than a vertical projection of an air inlet of the scroll casing of the centrifugal fan on the trim panel, a second louver group that falls within a range of the vertical projection, and a third louver group that is farther from the outlet than the vertical projection, the plurality of louver groups include louvers having the inclined portion, respectively, and a relationship of α 1 < α 2 < α 3 is satisfied when an acute angle of the louver having the inclined portion in the first louver group is α 1, an acute angle of the louver having the inclined portion in the second louver group is α 2, and an acute angle of the louver having the inclined portion in the third louver group is α 3.

In addition, in the embedded air conditioner indoor unit with the structure, α 1 is not less than 25 degrees.

According to the embedded air conditioner indoor unit with the structure, the flowing resistance of the air flow flowing into the indoor unit main body from the air suction opening is prevented from being too large due to the fact that the acute angle of the inclined part is too large, and accordingly large noise is avoided.

In addition, in the built-in air conditioning indoor unit with the above structure, the following structure may be adopted: in each of the bar groups, the acute angle of the inclined portions of the bars is the same.

The embedded air conditioner indoor unit with the structure is beneficial to simplifying the manufacturing difficulty of the decoration panel and reducing the manufacturing cost.

In the indoor unit of a built-in air conditioner according to the present invention, it is preferable that at least some of the two or more grills have an upright portion that is farther from the indoor unit main body than the inclined portion and is perpendicular to the suction plane.

According to the built-in air conditioning indoor unit of the present invention, compared to the case where the grill is entirely composed of the inclined portion, it is possible to increase the amount of the air flow flowing into the indoor unit body from the air suction port per unit time, and it is possible to prevent the user from easily seeing the components inside the indoor unit body through the air suction port at the portion where the grill having the inclined portion and the upright portion is provided, regardless of whether the user looks straight upward or obliquely upward, and it is possible to prevent the appearance from being affected by the dirt of the components inside the indoor unit body, such as the filter screen, etc., and it is possible to easily operate the upright portion by the user, and when the user cleans the installation panel with a tool such as a brush, the brush can smoothly enter between the adjacent grills to clean the dirt on the grill.

In addition, in the built-in air conditioning indoor unit with the above structure, the following structure may be adopted: in the at least part of the grills, when the dimension of the grills in the direction vertical to the air suction plane is H and the dimension of the inclined part in the direction vertical to the air suction plane is H, the relationship of 1/3H < H < 2/3H is satisfied.

According to the built-in air conditioner indoor unit with the structure, the inclined part can be used for preventing short-circuit airflow from being formed between the air suction opening and the air outlet, and the vertical part can be used for increasing the amount of airflow flowing into the indoor unit body from the air suction opening in unit time.

In addition, in the embedded air conditioner indoor unit with the above structure, the following structure can be further adopted: satisfies the relationship of H1/2H.

According to the embedded air conditioner indoor unit with the structure, the inclined part can be used for preventing short-circuit airflow from being formed between the air suction opening and the air outlet, and the vertical part can be used for increasing the amount of airflow flowing into the indoor unit body from the air suction opening in unit time.

In the indoor unit of a built-in air conditioner according to the present invention, it is preferable that the two or more grills have upright portions that are farther from the indoor unit main body than the inclined portion and are perpendicular to the suction plane, respectively, and the adjacent two upright portions have the same pitch.

According to the embedded air conditioner indoor unit, the air flow quantity at each grid in the air suction opening can be kept balanced basically.

In the built-in air conditioning indoor unit according to the present invention, it is preferable that the decorative panel includes: a frame; and the air suction grille part is provided with an opening forming the air suction opening and is provided with the grille bars, the air suction grille part is detachably connected with the frame through a connecting structure, the connecting structure is arranged on one side of the indoor unit main body, which is close to the decoration panel, and is positioned far away from the air suction grille part at the edge of the air outlet, among the plurality of grille bars, the grille bar furthest away from the air outlet is only formed by an upright part vertical to the air suction plane.

According to the embedded air conditioner indoor unit, the gap between the edge of the air suction opening far away from the air outlet and the grid strip far away from the air outlet is larger, so that the connecting structure can be conveniently operated through the gap, and the disassembly of the air suction grid part is realized.

In the built-in air conditioning indoor unit according to the present invention, it is preferable that the decorative panel includes: a frame; and the grille portion that induced drafts, this grille portion that induced drafts have and constitute the opening of inlet scoop, and be equipped with the grid, the grille portion that induced drafts can for the state that the frame was closed with for the frame is around between the inlet scoop with the horizontal axis rotation between the air outlet state of opening switches between, the frame is in near horizontal axis has the portion of keeping, the grille portion that induced drafts is in near horizontal axis has by the portion of keeping, the grille portion that induced drafts for under the state that the frame rotated to open, the portion of keeping with by the portion of keeping butt, thereby make the grille portion that induced drafts for the frame keeps opening the state of predetermineeing the angle.

According to the built-in air conditioning indoor unit of the present invention, for example, when the suction grille part is opened by being rotated relative to the frame in order to perform an operation such as an inspection operation on components in the indoor unit main body, the suction grille part is held at an opened state at a predetermined angle relative to the frame by the abutment of the holding part and the held part, and the operation such as the inspection operation can be performed easily.

In addition, in the embedded air conditioner indoor unit with the structure, the following structure can be adopted: the frame is provided with a supporting member protruding toward the indoor unit main body, the suction grille part is provided with a supported member protruding toward the indoor unit main body, the supported member is provided with an opening portion into which the supporting member is inserted, the supporting member abuts against an inner wall surface of the opening portion in a state where the suction grille part is rotated and opened with respect to the frame, and an edge portion of the suction grille part close to the horizontal axis abuts against a portion of the frame close to the horizontal axis, whereby the suction grille part is maintained in a state of being opened at a predetermined angle with respect to the frame.

According to the embedded air conditioner indoor unit with the structure, the air suction grille part can be kept in a state of being opened at a preset angle relative to the frame through a simple structure.

In addition, in the embedded air conditioner indoor unit with the structure, the following structure can be adopted: the support member has a guide surface extending in a circumferential direction around the horizontal axis, and the supported member has a guided surface extending in the circumferential direction around the horizontal axis, and the support member guides the opening of rotation of the suction grid portion with respect to the frame by abutment of the guide surface with the guided surface.

According to the built-in air conditioning indoor unit having the above-described configuration, for example, when the suction grille part is pivoted and opened with respect to the frame in order to perform an operation such as an inspection of components in the indoor unit main body, the pivoting and opening operation of the suction grille part can be performed more smoothly.

In addition, in the embedded air conditioner indoor unit with the structure, the following structure can be adopted: the support member has a restricting portion that restricts rotation of the suction grille portion relative to the frame about the horizontal axis toward the indoor unit main body in a state in which the suction grille portion is closed relative to the frame.

According to the embedded air conditioner indoor unit with the structure, the suction grille part can be reliably kept in a closed state relative to the frame.

In addition, in the embedded air conditioner indoor unit of the present invention, the following structure may be adopted: the air suction opening and the air outlet are arranged on the plane which is vertical to each other.

In addition, in the embedded air conditioner indoor unit with the structure, the following structure can be adopted: the air suction opening and the air outlet are arranged adjacently, or the air suction opening and the air outlet are arranged at intervals.

In addition, in the embedded air conditioner indoor unit with the structure, the following structure can be adopted: the inlet scoop is located the side just the air outlet is located the below, perhaps, the inlet scoop with the air outlet all is located the below.

In addition, in the embedded air conditioner indoor unit, the air suction opening is preferably positioned at the side and the air outlet is preferably positioned at the lower part, and the acute angle is more than or equal to 30 degrees and less than or equal to 60 degrees, and more preferably, the acute angle is more than or equal to 40 degrees and less than or equal to 50 degrees.

According to the embedded air-conditioning indoor unit of the present invention, the internal structure of the indoor unit main body (for example, a heat exchanger) can be well shielded by the grill, so that the internal structure of the indoor unit main body cannot be seen from the outside in a normal installation state of the air-conditioning indoor unit (a state in which the installation height is 2 m or more), thereby making the air-conditioning indoor unit more beautiful.

(effect of the invention)

According to the present invention, among the plurality of grills, two or more grills from the grill closest to the air outlet respectively have inclined portions inclined with respect to the air suction plane where the air suction port is located, the inclined portions extend obliquely toward the direction away from the air outlet with an end portion of the inclined portion closer to the inner side of the indoor unit main body as a starting point, and an acute angle of the inclined portion of one of the two or more grills is larger than an acute angle of the inclined portion of the other grill closer to the air outlet than the one grill, so that, at a portion of the air suction port closer to the air outlet, flow resistance of an air flow flowing into the indoor unit main body from the side closer to the air outlet is increased as compared with a case where the grill does not have an inclined portion, which helps to prevent a short-circuit air flow from being formed between the air suction port and the air outlet, and, at a portion of the air suction port farther from the air outlet, the, the indoor unit has the advantages that the distribution of air flow in the indoor unit body is enabled to be uniform, noise is reduced, even if a user looks right above the part provided with the grid strip with the inclined part, the user is not easy to see parts in the indoor unit body from the outside through the air suction opening, and the influence on attractiveness due to dirtiness of the parts in the indoor unit body, such as a filter screen and the like, is avoided.

Drawings

Fig. 1 is a side sectional view schematically showing a built-in air conditioning indoor unit according to a first embodiment of the present invention.

Fig. 2A is a partial cross-sectional side view schematically showing a decorative panel included in a built-in air conditioning indoor unit according to a first embodiment of the present invention.

Fig. 2B is a partially enlarged view of fig. 2A.

Fig. 3 is a bottom view schematically showing a decorative panel included in a built-in air conditioning indoor unit according to a first embodiment of the present invention.

Fig. 4 is a perspective view schematically showing a partial configuration of a frame and a suction grille part of a decorative panel in a built-in air conditioning indoor unit according to a first embodiment of the present invention.

Fig. 5 is a partial side sectional view schematically showing a state in which a suction grille part of a decorative panel in a built-in air conditioning indoor unit according to a first embodiment of the present invention is closed with respect to a frame.

Fig. 6 is a partial side sectional view schematically showing a state where a suction grille part of a decorative panel in a built-in air conditioning indoor unit according to a first embodiment of the present invention is pivoted and opened to a predetermined position with respect to a frame.

Fig. 7 is a partial plan view schematically showing a decorative panel included in a built-in air conditioning indoor unit according to a first embodiment of the present invention.

Fig. 8 is a schematic view showing a connection structure of a decorative panel included in a built-in air conditioning indoor unit according to a first embodiment of the present invention.

Fig. 9A to 9E are schematic views showing the influence of different types of grills on the user's view, in which the horizontal distances between adjacent grills are the same.

Fig. 10A and 10B are schematic views showing the influence of different types of grills on the operation, in which the horizontal distances between adjacent grills are the same.

Fig. 11A to 11C are schematic views showing the effect of different types of grills on cleaning, in which the horizontal distances between adjacent grills are the same.

Fig. 12 is a side sectional view schematically showing a built-in air conditioning indoor unit according to a second embodiment of the present invention.

Fig. 13 is a side sectional view schematically showing a built-in air conditioning indoor unit according to a modification of the present invention.

Fig. 14 is a side sectional view schematically showing a built-in air conditioning indoor unit according to another modification of the present invention.

(symbol description)

1. 1A, 1B embedded air conditioner indoor unit

10. 10B indoor machine main body

11. 11B fan

111 spiral case

1111 air inlet

1112 volute tongue

12. 12B heat exchanger

13 drainage tray

20. 20B decorative panel

21 air suction grille part

211 a-211 t, 211B grid

2111a to 2111s, 2111B inclined portion

2112a to 2112s upright part

212 guide part

213 supported by

2131 guided surface

2131 opening part

22 frame

221 support piece

2211 guide surface

2212 restriction

23 air outlet plate part

231 air guide blade

24 division plate

25 spring lock

251 sliding seat

2511 sliding seat body

2512 projection

2513 operation piece

252 spring

201. 201B air inlet

202. 202B air outlet

30B air outlet panel

PL, PLB induced draft plane

LH long hole

CC1 column

CC2 column

Detailed Description

Hereinafter, an embedded air conditioning indoor unit according to an embodiment of the present invention will be described with reference to the accompanying drawings.

< first embodiment >

Fig. 1 is a side sectional view schematically showing a built-in air conditioning indoor unit according to a first embodiment of the present invention, fig. 2A is a partial side sectional view schematically showing a decorative panel included in the built-in air conditioning indoor unit according to the first embodiment of the present invention, fig. 2B is a partial enlarged view of fig. 2A, fig. 3 is a bottom view schematically showing the decorative panel included in the built-in air conditioning indoor unit according to the first embodiment of the present invention, fig. 4 is a perspective view schematically showing a partial structure of a frame and a suction grille portion of the decorative panel in the built-in air conditioning indoor unit according to the first embodiment of the present invention, fig. 5 is a partial side sectional view schematically showing a state where the suction grille portion of the decorative panel in the built-in air conditioning indoor unit according to the first embodiment of the present invention is closed with respect to the frame, fig. 6 is a partial side sectional view schematically showing a state where the suction grille portion of the decorative, fig. 7 is a partial plan view schematically showing a decorative panel included in a built-in air conditioning indoor unit according to a first embodiment of the present invention, fig. 8 is a schematic view showing a connection structure of the decorative panel included in the built-in air conditioning indoor unit according to the first embodiment of the present invention, fig. 9A to 9E are schematic views showing influences of different types of grills on a user's field of view, in which distances in a horizontal direction between adjacent grills are the same, fig. 10A and 10B are schematic views showing influences of different types of grills on an operation, in which distances in the horizontal direction between adjacent grills are the same, and fig. 11A to 11C are schematic views showing influences of different types of grills on cleaning, in which distances in the horizontal direction between adjacent grills are the same.

Here, for convenience of explanation, three directions orthogonal to each other are set as an X direction, a Y direction and a Z direction, one side in the Z direction is set as Z1, and the other side in the Z direction is set as Z2, where the X direction and the Y direction correspond to the Z direction in the horizontal direction in the actual mounted state of the air-conditioning indoor unit corresponding to the up-down direction in the actual mounted state of the air-conditioning indoor unit, the Z1 side corresponds to the upper side in the actual mounted state of the air-conditioning indoor unit, and the Z2 side corresponds to the lower side in the actual mounted state of the air-conditioning indoor unit.

The built-in air conditioning indoor unit 1 of the present embodiment is connected to an air conditioning outdoor unit, not shown, by a refrigerant pipe, thereby constituting a refrigerant circuit.

As shown in fig. 1 to 3, a built-in air conditioning indoor unit 1 includes an indoor unit main body 10 and a decorative panel 20 provided below the indoor unit main body 10, wherein the indoor unit main body 10 is provided with a fan 11, the decorative panel 20 has an air suction opening 201 and an air outlet 202, and the air suction opening 201 is provided with a plurality of grills 211a to 211t arranged in the X direction in fig. 1.

Here, as shown in fig. 1, the indoor unit main body 10 has a substantially rectangular parallelepiped shape, and is provided with a fan 11, a heat exchanger 12, a drain pan 13, and a filter screen not shown. The fan 11 is a centrifugal fan having a scroll casing 111, an air inlet 1111 of the scroll casing 111 is directed in the Y direction, a scroll tongue 1112 of the scroll casing 111 is directed to the heat exchanger 12, the heat exchanger 12 is adjacent to the fan 11, the heat exchanger 12 is linearly extended with a slight inclination with respect to the vertical direction, a drain pan 13 is provided below the heat exchanger 12 for receiving the condensed water generated in the heat exchanger 12, and a screen covers the air inlet 201.

Further, as shown in fig. 3, the decorative panel 20 has an air suction opening 201 and an air outlet 202 provided on the same plane. Specifically, as shown in fig. 3, the decorative panel 20 is substantially square when viewed in the vertical direction, and includes a frame 22, and a suction grille 21, an air outlet 23, and a partition 24 provided in the frame 22, wherein the frame 22 has an air suction opening into which the suction grille 21 is fitted, an intermediate opening into which the partition 24 is fitted, and an air outlet opening into which the air outlet 23 is fitted, the suction grille 21 has an opening constituting an air suction opening 201, and is provided with bars 211a to 211t, the air outlet 23 has an opening constituting an air outlet 202, and is provided with an air guide blade 231, the air guide blade 231 is switchable between a state of closing the air outlet 202 and a state of opening the air outlet 202 so as to face away from the air suction opening 201 (see fig. 1), and the partition 24 is positioned between the suction grille 21 and the air outlet 23. As shown in fig. 4 to 6, the suction grille part 21 can be switched between a closed state with respect to the frame 22 and an opened state with respect to the frame 22 by rotating about a horizontal axis O between the suction opening 201 and the air outlet 202, the frame 22 has a holding part near the horizontal axis O, the suction grille part 21 has a held part near the horizontal axis O, and in the opened state of the suction grille part 21 with respect to the frame 22 by rotating, the holding part abuts against the held part, so that the suction grille part 21 is held in the opened state at a predetermined angle with respect to the frame 22. Specifically, as shown in fig. 4 to 6, a support member 221 protruding toward the indoor unit main body 10 is provided on the frame 22, a supported member 213 protruding toward the indoor unit main body 10 is provided on the suction grille 21, the supported member 213 is provided with an opening 2131 into which the support member 221 is inserted, and in a state where the suction grille 21 is opened BY rotation relative to the frame 22, the support member 221 abuts against an inner wall surface of the opening 2131 BY the action of gravity, and an edge portion BY of the suction grille 21 close to the horizontal axis O abuts against a portion BF of the frame 22 close to the horizontal axis O, whereby the suction grille 21 is maintained in a state of being opened BY a predetermined angle (for example, 20 to 60 degrees, but not limited thereto) relative to the frame 22; the support member 221 has a guide surface 2211 extending in the circumferential direction around the horizontal axis O, the supported member 213 has a guided surface 2131 extending in the circumferential direction around the horizontal axis O, and the support member 221 abuts against the guided surface 2131 with the guide surface 2211 to guide the suction grill portion 21 to open the rotation with respect to the frame 22; the support member 221 has a restriction portion 2212, and the restriction portion 2212 restricts the rotation of the suction grille portion 21 relative to the frame 22 about the horizontal axis O toward the indoor unit main body 10 in a state where the suction grille portion 21 is closed relative to the frame 22 (in the present embodiment, the support member 221 and a portion BF of the frame 22 close to the horizontal axis O constitute a holding portion, and the supported member 213 and an edge portion BY of the suction grille portion 21 close to the horizontal axis O constitute a held portion). As shown in fig. 1, the fan 11 corresponds to the suction grille 21 and the heat exchanger 12 and the drain pan 13 correspond to the partition plate 24 in the vertical direction (but not limited thereto, the fan may correspond to the partition plate and the heat exchanger and the drain pan may correspond to the suction grille). The suction grille 21 is detachably connected to the frame 22 by a connecting structure provided on the side of the decorative panel 20 closer to the indoor unit main body 10 (the side in the Z1 direction) and located near the edge of the suction grille 21 away from the outlet 202. Specifically, as shown in fig. 7 and 8, the connection structure includes a pair of latch locks 25 (one of which is shown in fig. 7 and the other of which is shown in fig. 8) provided on the air suction grille part 21, an engagement opening provided on the frame 22 and into which the pair of latch locks 25 are engaged, and a guide part 212 provided on the air suction grille part 21 and guiding the latch locks 25, wherein the latch locks 25 have a slide holder 251 and a spring 252, the slide holder 251 is provided on the side (Z1 direction side) of the air suction grille part 21 closer to the indoor unit main body 10 so as to be slidable in the X direction, and one end in the Y direction is engageable with the engagement opening of the frame 22, and the slide holder 251 has an elongated slide holder main body 2511 extending in the Y direction, a protrusion 2512 extending from the slide holder main body 2511 toward the X direction, and an operation piece 2513 extending downward from the protrusion 2512, the operation piece 2513 protrudes below the air suction grille part 21 through a gap between the edge of the air suction grille part 21 away from the air outlet 202 and the grille 211t farthest from the air outlet 202 among the plurality of grills 211a to 211t, the spring 252 biases the slide holder 251 in a direction of engaging the slide holder 251 with the opening, and the guide part 212 guides the slide holder 251 in the Y direction (in the illustrated example, the slide holder main body 2511 has a housing cavity SS extending in the Y direction and a column CC1 extending in the Y direction in the housing cavity SS, the spring 252 is housed in the housing cavity SS so as to surround the column CC1, the slide holder column 2511 has a long hole LH extending in the Y direction, and the guide part 212 includes a column CC2 penetrating the long hole LH). When maintenance is performed in the actual attachment state, the suction grille part 21 can be detached from the frame 22 by disengaging one end of the slide holder 251 from the engagement opening against the biasing force of the spring 252 in a state where the operation pieces 2513 of the pair of spring latches 25 are respectively engaged with, for example, thumbs of both hands.

In the present embodiment, as shown in fig. 2A, of the plurality of bars 211a to 211t, two or more bars 211a to 211s from the bar 211a closest to the outlet port 202 have inclined portions 2111a to 2111s (in the illustrated example, the bars 211a to 211s have inclined portions other than the bar 211t farthest from the outlet port 202) inclined with respect to the suction plane PL on which the air suction port 201 is located, the inclined portions 2111a to 2111s are inclined and extended in a direction away from the outlet port 202 with the end portions of the inclined portions 2111a to 2111s closer to the inside of the indoor unit main body 10 as starting points, the inclined portions 2111a to 2111s form an acute angle α (see fig. 1) with respect to the suction plane PL, and the acute angle of one of the two or more bars 2111a to 2111s is larger than the acute angle of the inclined portion of the other bar closer to the outlet port 202 than the one bar (for example, the acute angle of the bar 2111b is larger than the acute angle of the bar 2111 a.

As shown in fig. 1, the plurality of bars 211a to 211t are divided into a plurality of bar groups, and the plurality of bar groups include: a first grill group G1 closer to the air outlet 202 than the vertical projection of the air inlet 1111 of the scroll casing 111 of the fan 11 on the decorative panel 20; a second grid group G2 falling within the range of the above-mentioned vertical projection; and a third bar group G3 farther from the outlet 202 than the vertical projection.

As shown in fig. 2A, the acute angle of the inclined portion is larger as the distance between the two or more grills 211a to 211s and the outlet 202 increases, and the acute angle of the inclined portion is not less than 25 ° among the two or more grills 211a to 211 s.

In the two or more grills 211a to 211s, the difference between the acute angles of the inclined portions of the two adjacent grills is a constant value.

As shown in fig. 2A, the two or more louvers 211a to 211s have upright portions 2112A to 2112s that are positioned below the inclined portions 2111a to 2111s and are perpendicular to the suction plane PL, and the pitch between two adjacent upright portions 2112A to 2112s is equal. As shown in fig. 2B, among the two or more grills 211a to 211s, a relationship of 1/3H < 2/3H, preferably a relationship of H1/2H, is satisfied when a vertical dimension of the grill is H and a vertical dimension of the inclined portion is H.

As shown in fig. 2A, among the plurality of bars 211a to 211t, the bar 211t farthest from the air outlet 202 is constituted only by an upright portion perpendicular to the suction plane PL.

According to the indoor unit 1 of a built-in air conditioner of the present invention, among the plurality of grills 211a to 211t, two or more grills 211a to 211s from the grill 211a closest to the outlet 202 have inclined portions 2111a to 2111s inclined with respect to the suction plane PL on which the suction opening 201 is located, the inclined portions 2111a to 2111s are inclined and extended in a direction away from the outlet 202 with an end portion thereof closer to the inside of the indoor unit main body 10 as a starting point, the inclined portions 2111a to 2111s form an acute angle with the suction plane PL, and the acute angle of the inclined portion of one of the two or more grills 2111a to 2111s is larger than the acute angle of the inclined portion of the other grill closer to the outlet 202 than the one grill. Therefore, in the portion of the suction opening 201 close to the air outlet 202, the flow resistance of the air flow flowing into the indoor unit main body 10 from the side close to the air outlet 202 is increased as compared with the case where the grill does not have an inclined portion, which contributes to preventing the short-circuit air flow from being formed between the suction opening 201 and the air outlet 202, and in the portion of the suction opening 201 farther from the air outlet 202, the air flow can be prevented from flowing toward the side close to the air outlet 202 in the indoor unit main body 10, which contributes to making the distribution of the air flow in the indoor unit main body 10 uniform, and reducing noise; further, in the portion where the grill with the inclined portion is provided, even if the user looks directly upward, it is difficult to see the components inside the indoor unit main body 10 from the outside through the air suction opening 201, specifically, as shown in fig. 9A, in the case where the entire grill does not have the inclined portion but extends in the vertical direction, it is easy for the user to see the components inside the indoor unit main body 10 through the gap between the adjacent grills when looking directly upward, whereas as shown in fig. 9B and 9C, in the case where the grill has the inclined portion, the view is easily blocked by the inclined portion even if the user looks directly upward, and therefore, the user is difficult to see the components inside the indoor unit main body 10 from the outside through the air suction opening 201, which contributes to avoiding the aesthetic problems due to the dirtying of the components inside the indoor unit main body 10, such as a screen, and the like.

Further, according to the built-in air conditioning indoor unit 1 of the present invention, even if the suction opening 201 and the outlet 202 are disposed close to each other, the possibility of short-circuit airflow being formed between the suction opening 201 and the outlet 202 is reduced by the inclined portions 2111a to 2111s of the grills 211a to 211s, and therefore, it is possible to contribute to miniaturization; on the other hand, if the distance between the air suction opening 201 and the air outlet 202 is kept constant, the air outlet speed can be increased and the adjustment angle range of the air guide blade at the air outlet 202 can be increased without forming a short-circuit airflow between the air suction opening 201 and the air outlet 202.

In addition, according to the built-in air conditioning indoor unit 1 of the present invention, since the air guide blade 231 opens the outlet 202 so as to face away from the air suction opening 201, even if the distance between the air suction opening 201 and the outlet 202 is set small, the short-circuit airflow is easily prevented from being formed between the air suction opening 201 and the outlet 202, as compared with the case where the air guide blade opens the outlet so as to face the air suction opening.

In addition, according to the built-in air conditioning indoor unit 1 of the present invention, the more distant the grill from the outlet 202, the more acute angle of the inclined portion is, among the two or more grills 211a to 211s, so that the more distant the outlet 202, the less resistance to the airflow flowing into the indoor unit body 10 due to the inclined portion is, in the air inlet 201, and this contributes to the improvement of the air suction efficiency of the fan 11.

In addition, according to the built-in air conditioning indoor unit 1 of the present invention, since the difference between the acute angles of the inclined portions of two adjacent grills among the two or more grills 211a to 211s is a fixed value, it contributes to making the distribution of the airflow sucked into the indoor unit main body 10 from the air suction opening 201 uniform and reducing noise.

In addition, according to the built-in air conditioning indoor unit 1 of the present invention, the acute angle of the inclined portion 2111a to 2111s of the two or more grills 211a to 211s is not less than 25 °, which helps to prevent the flow resistance of the airflow flowing into the indoor unit main body 10 from the air inlet 201 from becoming too large due to the excessive acute angle of the inclined portion, which leads to generation of loud noise.

Further, according to the built-in air conditioning indoor unit 1 of the present invention, the two or more grills 211a to 211s respectively have the upright portions 2112a to 2112s that are positioned below the inclined portions 2111a to 2111s and are perpendicular to the suction plane PL, and therefore, contribute to an increase in the amount of airflow flowing from the suction port 201 into the indoor unit main body 10 per unit time, as compared with the case where the grills are entirely constituted by inclined portions; moreover, regardless of whether the user looks directly upward or obliquely upward, in the portion where the grill having the inclined portion and the upright portion is provided, it is difficult for the user to see the components inside the indoor unit main body 10 from the outside through the air suction opening 201, specifically, as shown in fig. 9D, in the case where the grill is constituted only by the inclined portion, if the user looks obliquely upward along the direction in which the inclined portion is inclined, it is relatively easy to see the components inside the indoor unit main body 10 through the gap between the adjacent grill, whereas, as shown in fig. 9E, in the case where the grill has both the inclined portion and the linear portion, the view is easily blocked by the inclined portion and the linear portion even if the user looks obliquely upward, and therefore, it is helpful to avoid the aesthetic problems that the components inside the indoor unit main body 10, such as the screen, are dirty; further, the upright parts facilitate the operation of the worker, and specifically, as shown in fig. 10A, when the entire grid is formed of the inclined parts, if the acute angle of the inclined parts is too large, the fingers are less likely to be inserted between the adjacent grid to perform the operation, whereas as shown in fig. 10B, in the case where the grid has both the inclined parts and the linear parts, the fingers are likely to be inserted between the adjacent grid to perform the operation; further, when a user cleans the installation panel with a tool such as a brush, the brush bristles can smoothly enter between adjacent grills to clean dirt on the grills, specifically, as shown in fig. 11A and 11B, when the entire grill is formed of the inclined portion, the brush bristles are not easy to clean the portion of the grill closer to the indoor unit main body, whereas as shown in fig. 11C, when the grill has both the inclined portion and the linear portion, the brush bristles are easy to clean the portion of the grill closer to the indoor unit main body.

Further, according to the built-in air conditioning indoor unit 1 of the present invention, since the relationship of 1/3H < 2/3H is satisfied among the two or more grills 211a to 211s, it is possible to increase the amount of airflow flowing from the air suction port 201 into the indoor unit main body 10 per unit time by the upright portions 2112a to 2112s while preventing short-circuit airflow from being formed between the air suction port 201 and the air outlet 202 by the inclined portions 2111a to 2111 s.

In addition, according to the built-in air conditioning indoor unit 1 of the present invention, the two adjacent upright portions 2112a to 2112s are equally spaced from each other in the two or more grills 211a to 211s, and therefore, it is possible to ensure that the amount of air flow at each grill in the air suction opening 201 is substantially equalized.

In addition, according to the embedded air conditioning indoor unit 1 of the present invention, the connecting structure is provided on the side of the decorative panel 20 close to the indoor unit main body 10 and is located at the edge of the air suction grille part 21 away from the air outlet 202, and among the plurality of bars 211a to 211t, the bar 211t farthest from the air outlet 202 is formed only by the upright part perpendicular to the air suction plane PL, and therefore, it is helpful to ensure a large gap between the edge of the air suction opening 201 away from the air outlet 202 and the bar 211t farthest from the air outlet 202, and therefore, the connecting structure can be conveniently operated through the gap to detach the air suction grille part 21.

Further, according to the built-in air conditioning indoor unit 1 of the present invention, the frame 22 has the holding portion near the horizontal axis O, and the suction grille portion 21 has the held portion near the horizontal axis O, and in a state where the suction grille portion 21 is rotated and opened with respect to the frame 22, the holding portion abuts against the held portion, so that the suction grille portion 21 is held in a state of being opened at a predetermined angle with respect to the frame 22, and therefore, for example, when the suction grille portion 21 is rotated and opened with respect to the frame 22 in order to perform an operation such as an inspection of a component in the indoor unit main body 10, the operation such as the inspection can be performed easily by holding the suction grille portion 21 in a state of being opened at a predetermined angle with respect to the frame 22 by abutting against the held portion.

Further, according to the built-in air conditioning indoor unit 1 of the present invention, the holding part is constituted by the supporting member 221 and the portion of the frame 22 close to the horizontal axis O, and the held part is constituted by the supported member 213 and the edge portion of the suction grill part 21 close to the horizontal axis O, and therefore, the suction grill part can be held in the state of being opened at the preset angle with respect to the frame with a simple structure.

Further, according to the built-in air conditioning indoor unit 1 of the present invention, since the support member 221 is brought into contact with the guided surface 2131 by the guide surface 2211 to guide the suction grille 21 to be opened and closed with respect to the frame 22, for example, when the suction grille 21 is opened and closed with respect to the frame 22 for the purpose of performing an operation such as maintenance of components in the indoor unit main body 10, the operation of opening and closing the suction grille 21 can be performed more smoothly.

Further, according to the built-in air conditioning indoor unit 1 of the present invention, the supporter 221 has the restriction portion 2212, and in the state where the suction grille portion 21 is closed with respect to the frame 22, the restriction portion 2212 restricts the rotation of the suction grille portion 21 with respect to the frame 22 toward the unit main body 10 about the horizontal axis O, and therefore, the suction grille portion 21 can be more reliably held in the closed state with respect to the frame 22.

< second embodiment >

Fig. 12 is a side sectional view schematically showing a built-in air conditioning indoor unit according to a second embodiment of the present invention. Since the basic configuration of the present embodiment is the same as that of the first embodiment, the same reference numerals are given to the common portions, and the description thereof will be omitted.

The indoor unit 1A of the built-in air conditioner of the present embodiment has a plurality of grills corresponding to the plurality of grills 211A to 211t of the first embodiment, and as with the first embodiment, the plurality of grills are divided into a plurality of grill groups, and the plurality of grill groups include: a first grill group G1 closer to the air outlet 202 than the vertical projection of the air inlet 1111 of the scroll casing 111 of the fan 11 on the decorative panel 20; a second grid group G2 falling within the range of the above-mentioned vertical projection; and a third bar group G3 farther from the outlet 202 than the vertical projection.

Further, the plurality of bar groups respectively include bars having inclined portions (in the illustrated example, each bar is constituted only by an inclined portion except for the bar farthest from the outlet port 202), and the acute angle angles of the inclined portions of the bars are the same in each bar group except for the bar farthest from the outlet port 202, and when the acute angle of the bar having an inclined portion in the first bar group G1 is α 1, the acute angle of the bar having an inclined portion in the second bar group G2 is α 2, and the acute angle of the bar having an inclined portion in the third bar group G3 is α 3, the relationship of α 1 < α 2 < α 3 is satisfied, and the difference between the acute angle angles of the bars of the adjacent bar groups is a fixed value, and α 1 is equal to or greater than 25 °.

The embedded air conditioning indoor unit 1A according to the present invention can achieve substantially the same technical effects as the embedded air conditioning indoor unit 1 according to the first embodiment.

Further, according to the built-in air conditioning indoor unit 1A of the present invention, the acute angle α 1 of the louver having the inclined portion in the first louver group G1, the acute angle α 2 of the louver having the inclined portion in the second louver group G2, and the acute angle α 3 of the louver having the inclined portion in the third louver group G3 satisfy the relationship of α 1 < α 2 < α 3, and therefore, in the air suction opening 201, the resistance to the airflow flowing into the indoor unit body 10 due to the inclined portion becomes smaller as it is farther from the air outlet 202, and therefore, it contributes to the improvement of the air suction efficiency of the fan 11.

Further, according to the built-in air conditioning indoor unit 1A of the present invention, in each of the grill groups, the acute angle angles of the inclined portions of the grills are the same except for the grill farthest from the outlet 202, and therefore, it is possible to contribute to simplification of the difficulty of manufacturing the decorative panel 20 and reduction of the manufacturing cost.

The present invention is described above by way of example with reference to the accompanying drawings, and it is to be understood that the specific implementations of the present invention are not limited to the above-described embodiments.

For example, in the above-described embodiment, the decorative panel 20 is provided below the indoor unit main body 10, and the decorative panel 20 has the air inlet 201 and the air outlet 202, but the present invention is not limited thereto.

For example, the decorative panel may be provided on the side of the indoor unit main body, or only the air inlet may be provided in the decorative panel and the air outlet may be provided in the indoor unit main body.

Specifically, as shown in fig. 13, the built-in air conditioning indoor unit 1B includes an indoor unit main body 10B, a decorative panel 20B, and an outlet panel 30B, wherein the indoor unit main body 10B has an air inlet on a side surface thereof, has an air outlet 202B on a lower side thereof, and is provided with a fan 11B (for example, an axial flow fan) and a heat exchanger 12B surrounding the fan 11B, the decorative panel 20B is provided on an outer surface of the indoor unit main body 10B so as to at least partially surround the indoor unit main body 10B, and has an air inlet 201B opposed to the air inlet, and the air inlet 201B is provided with a plurality of grills 211B. Further, among the plurality of grills 211B, two or more grills from the grill closest to the outlet 202B (the lowermost grill in fig. 13) have inclined portions 2111B inclined with respect to the suction plane PLB where the suction port 201B is located, the inclined portions 2111B extend obliquely in a direction away from the outlet 202B with an end portion of the inclined portion on the inner side of the indoor unit main body 10B as a starting point, the inclined portions 2111B form an acute angle with the suction plane PLB, and the acute angle of the inclined portion of one of the two or more grills is larger than the acute angle of the inclined portion of the other grill closer to the outlet than the one grill. In this case, the acute angle is preferably equal to or greater than 30 ° and equal to or less than 60 °, and more preferably equal to or greater than 40 ° and equal to or less than 50 °, so that the internal structure of the indoor unit main body (e.g., a heat exchanger or the like) can be shielded well by the grill so that the internal structure of the indoor unit main body is not visible from the outside in a normal installation state of the air conditioning indoor unit (a state in which the installation height is 2 meters or more), and the air conditioning indoor unit becomes more aesthetically pleasing.

In the above-described embodiment, the air suction opening and the air outlet are provided on the same plane, but the present invention is not limited to this, and the air suction opening and the air outlet may be provided on different planes (for example, as shown in fig. 13, the air suction opening is provided on a side surface of the air-conditioning indoor unit, and the air outlet is provided on a bottom surface of the air-conditioning indoor unit, or as shown in fig. 14, the air suction opening is provided on a bottom surface of the air-conditioning indoor unit, and the air outlet is provided on a side.

In the above embodiment, the air inlet and the air outlet may be provided separately from each other or adjacent to each other.

In the above embodiment, the fan 11 is a centrifugal fan, but the present invention is not limited to this, and the fan 11 may be a cross-flow fan, a sirocco fan, or the like.

In the above embodiment, the heat exchanger 12 is linear and extends slightly obliquely with respect to the vertical direction, but the shape and arrangement of the heat exchanger 12 may be changed as needed.

In the above embodiment, the number of the grills included in the suction grille part may be appropriately changed as necessary.

In the above embodiment, the plurality of grills included in the suction grill portion include the grills farthest from the outlet port 202 and each of the grills includes the inclined portion, but the present invention is not limited thereto.

For example, the following structure may be adopted: as shown in fig. 1, 3, and 12, L0 is inversely proportional to L1 when a width (width in the X direction) spanned by two or more grills having inclined portions is L0 and a distance between the air inlet 201 and the air outlet 202 is L1. Further, the following structure may be adopted: as shown in fig. 1, 3, and 12, when the width (width in the X direction) spanned by two or more grills having inclined portions is L0 and the distance between the front end of the air guide blade 231 at the maximum opening angle and the air suction opening 201 is L2, L0 is inversely proportional to L2.

In this case, the grill with the inclined portion can prevent the short-circuit airflow from being formed between the suction opening 201 and the air outlet 202 in a small installation range, and thus, the flow resistance of the airflow flowing into the indoor unit main body 10 at a portion of the suction opening 201 farther from the air outlet 202 can be prevented from being increased by the inclined portion provided in the grill, and the suction efficiency of the fan can be improved.

In the above embodiment, the acute angle of the inclined portion of the plurality of grills is not less than 25 °, but is not limited thereto, and the acute angle of the inclined portion may be appropriately adjusted as necessary.

In the above embodiment, the grill farthest from the air outlet 202 is formed of only the upright portion perpendicular to the air suction plane, but is not limited to this, and in some cases, the grill farthest from the air outlet 202 may be formed as a grill having an inclined portion, or as a grill having an inclined portion and an upright portion located below the inclined portion. In this case, a screw or the like may be used instead of the above-described latch.

In the first embodiment, as shown in fig. 2B, in the grills 211a to 211s, the relationship of 1/3H < 2/3H is satisfied when the vertical dimension of the grill is H and the vertical dimension of the inclined portion is H, but the present invention is not limited to this, and the ratio of H to H may be appropriately set as necessary.

In the first embodiment, the difference between the acute angles of the inclined portions of the two adjacent grills is a fixed value, but the present invention is not limited thereto, and the difference between the acute angles of the inclined portions of the two adjacent grills may not be a fixed value.

In addition, in the first embodiment, the pitch between the two adjacent upright portions 2112a to 2112s is equal, but the first embodiment is not limited to this, and the pitch between the two adjacent upright portions 2112a to 2112s may be different.

In the second embodiment, the difference between the acute angles of the inclined portions of the grid bars of the adjacent grid bar groups is a fixed value, but the present invention is not limited to this, and the difference between the acute angles of the inclined portions of the grid bars of the adjacent grid bar groups may not be a fixed value.

Further, in the second embodiment, the acute angle angles of the inclined portions of the grills are the same in each of the grill groups except for the grill farthest from the outlet port 202, but the present invention is not limited thereto, and the acute angle angles of the inclined portions of the grills may be different in some of the grill groups.

Claims

1. An embedded air-conditioning indoor unit comprises an indoor unit main body (10) and a decorative panel (20) arranged below or on the side of the indoor unit main body, wherein the indoor unit main body is provided with a fan (11), the indoor unit main body or the decorative panel is provided with an air outlet (202), the decorative panel (20) is provided with an air suction opening (201), the air suction opening is provided with a plurality of grid bars (211 a-211 t), and the embedded air-conditioning indoor unit is characterized in that,

among the plurality of grills (211a to 211t), two or more grills (211a to 211s) from the grill closest to the outlet have inclined portions (2111a to 2111s) inclined with respect to a suction Plane (PL) where the suction port (201) is located, respectively, the inclined portions (2111a to 2111s) extending obliquely in a direction away from the outlet (202) with an end portion of the inclined portions (2111a to 2111s) on the inner side of the indoor unit main body as a starting point,

the inclined part and the air suction plane form an acute angle, and the acute angle of the inclined part of one grid of the more than two grids is larger than that of the inclined part of the other grid close to the air outlet.

2. The built-in air conditioning indoor unit of claim 1, wherein,

the decorative panel (20) is provided with the air suction opening (201) and the air outlet (202) which are arranged on the same plane.

3. The built-in air conditioning indoor unit of claim 2, wherein,

if the width spanned by the more than two grate bars (211 a-211 s) is L0 and the distance between the air suction opening (201) and the air outlet (202) is L1, L0 is inversely proportional to L1.

4. The built-in air conditioning indoor unit of claim 2, wherein,

the air outlet is provided with air guide blades (231), the air guide blades (231) can be switched between a state of closing the air outlet (202) and a state of opening the air outlet (202) in a mode of being back to the air suction opening (201),

if the width spanned by the two or more grills (211a to 211s) is L0 and the distance between the front end of the air guide blade (231) at the maximum opening angle and the air suction opening (201) is L2, L0 is inversely proportional to L2.

5. The built-in air conditioning indoor unit of claim 1, wherein,

among the two or more grills (211a to 211s), the acute angle of the inclined portion is larger as the grill is farther from the outlet (202).

6. The built-in air conditioning indoor unit of claim 5, wherein,

in the two or more grid bars (211 a-211 s), the difference between the acute angles of the inclined parts of the two adjacent grid bars is a fixed value.

7. The built-in air conditioning indoor unit of claim 1, wherein,

the more than two grid bars (211 a-211 s) are divided into a plurality of grid bar groups,

in each of the bar groups, the acute angle of the inclined portions of the bars is the same,

in two adjacent grid groups, the acute angle of the inclined part of the grid is larger as the grid group is farther away from the air outlet (202).

8. The built-in air conditioning indoor unit of claim 7, wherein,

the difference between the acute angles of the inclined portions of the grid bars of the adjacent grid bar groups is a fixed value.

9. The built-in air conditioning indoor unit of claim 1, wherein,

the acute angle is more than or equal to 25 degrees.

10. The built-in air conditioning indoor unit of claim 1, wherein,

the fan (11) is a centrifugal fan,

the plurality of grid bars are divided into a plurality of grid bar groups,

the plurality of grid sets includes:

a first grid group (G1) which is closer to the air outlet than the vertical projection of the air inlet (1111) of the volute (111) of the centrifugal fan on the decorative panel;

a second grid group (G2) falling within the range of the perpendicular projection; and

a third bar group (G3) farther from the air outlet than the perpendicular projection,

the plurality of grill sets respectively include grills having the inclined portions,

when the acute angle of the grid bars having the inclined parts in the first grid bar group is α 1, the acute angle of the grid bars having the inclined parts in the second grid bar group is α 2, and the acute angle of the grid bars having the inclined parts in the third grid bar group is α 3, the relationship of α 1 < α 2 < α 3 is satisfied.

11. The built-in air conditioning indoor unit of claim 10, wherein,

α1≥25°。

12. the built-in air conditioning indoor unit of claim 10, wherein,

in each of the bar groups, the acute angle of the inclined portions of the bars is the same.

13. The built-in air conditioning indoor unit of claim 1, wherein,

at least some of the two or more grills (211a to 211s) have upright portions (2112a to 2112s) that are farther from the indoor unit main body (10) than the inclined portion and that are perpendicular to the suction plane.

14. The built-in air conditioning indoor unit of claim 13, wherein,

in the at least part of the grills, when the dimension of the grills in the direction vertical to the air suction plane is H and the dimension of the inclined part in the direction vertical to the air suction plane is H, the relationship of 1/3H < H < 2/3H is satisfied.

15. The built-in air conditioning indoor unit of claim 14, wherein,

satisfies the relationship of H1/2H.

16. The built-in air conditioning indoor unit of claim 1, wherein,

the two or more grills (211 a-211 s) respectively have vertical parts (2112 a-2112 s) which are farther from the indoor unit main body (10) than the inclined part and are perpendicular to the air suction plane,

the distance between two adjacent upright parts is equal.

17. The built-in air conditioning indoor unit of claim 1, wherein,

the decorative panel (20) has:

a frame (22); and

an air suction grille part (21), the air suction grille part (21) is provided with an opening forming the air suction opening (201) and is provided with the grille bar,

the air suction grid part (21) is detachably connected with the frame (22) through a connecting structure,

the connecting structure is arranged on one side of the decorative panel (20) close to the indoor unit main body (10) and is positioned on the edge of the air suction grille part (21) far away from the air outlet (202),

among the plurality of grills, the grill farthest from the air outlet (202) is constituted only by an upright portion perpendicular to the air suction Plane (PL).

18. The built-in air conditioning indoor unit of claim 1, wherein,

the decorative panel (20) has:

a frame (22); and

the air suction grille (21) can be switched between a closed state relative to the frame (22) and an open state relative to the frame (22) rotating about a horizontal axis between the air suction opening and the air outlet,

the frame (22) having a holding portion (BF) in the vicinity of the horizontal axis,

the suction grille part (21) has a held part (BY) in the vicinity of the horizontal axis,

the holding portion abuts against the held portion in a state where the suction grid portion (21) is rotated open with respect to the frame (22), thereby holding the suction grid portion (21) in a state of being opened at a preset angle with respect to the frame (22).

19. The built-in air conditioning indoor unit of claim 18, wherein,

a support member (221) protruding toward the indoor unit main body (10) is provided on the frame (22),

a supported member (213) protruding toward the indoor unit main body (10) is provided in the suction grille (21), the supported member (213) is provided with an opening (2131) into which the supported member (221) is inserted,

when the air suction grille part (21) is rotated and opened relative to the frame (22), the supporting piece (221) is abutted against the inner wall surface of the opening part (2131), and the edge part of the air suction grille part (21) close to the horizontal axis is abutted against the part of the frame (22) close to the horizontal axis, so that the air suction grille part (21) is kept in a state of being opened by a preset angle relative to the frame (22).

20. The built-in air conditioning indoor unit of claim 19, wherein,

the support member (221) has a guide surface (2211) extending in a circumferential direction around the horizontal axis,

the supported member (213) has a guided surface (2131) extending in a circumferential direction around the horizontal axis,

the support member (221) guides the opening of the rotation of the suction grille part (21) with respect to the frame (22) by the guide surface abutting against the guided surface.

21. The built-in air conditioning indoor unit of claim 19, wherein,

the support (221) has a restriction (2212),

the restricting portion (2212) restricts the rotation of the suction grill portion (21) relative to the frame (22) about the horizontal axis toward the indoor unit main body (10) in a state where the suction grill portion (21) is closed relative to the frame (22).

22. The built-in air conditioning indoor unit of claim 1, wherein,

the air suction opening and the air outlet are arranged on the plane which is vertical to each other.

23. The built-in air conditioning indoor unit of claim 2 or 22, wherein,

the air suction opening is arranged adjacent to the air outlet,

alternatively, the first and second electrodes may be,

the air suction opening and the air outlet are arranged at intervals.

24. The built-in air conditioning indoor unit of claim 23, wherein,

the air suction opening is positioned at the side and the air outlet is positioned at the lower part,

alternatively, the first and second electrodes may be,

the air suction opening and the air outlet are both positioned below the air suction opening.

25. The built-in air conditioning indoor unit of claim 1, wherein,

the acute angle is more than or equal to 30 degrees and less than or equal to 60 degrees.

26. The built-in air conditioning indoor unit of claim 25, wherein,

the acute angle is more than or equal to 40 degrees and less than or equal to 50 degrees.