US20200240676A1

US20200240676A1 - Indoor unit of air-conditioning apparatus

Info

Publication number: US20200240676A1
Application number: US16/637,917
Authority: US
Inventors: Hiroyuki Takada
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2017-10-18
Filing date: 2017-10-18
Publication date: 2020-07-30
Also published as: JPWO2019077690A1; EP3699510A4; WO2019077690A1; EP3699510A1; CN111213015B; CN111213015A; EP3699510B1; JP6755409B2

Abstract

An indoor unit includes a lateral airflow adjusting unit that adjusts in a lateral direction, the angle of air that is blown from an air outlet. The lateral airflow adjusting unit includes a plurality of lateral airflow adjusting plates that are arranged in a blowout flow passage at defined intervals in the lateral direction, and a drive device that includes a drive motor and swings the plurality of lateral airflow adjusting plates with power generated by the drive motor. The blowout flow passage causes a heat exchanger and the air outlet to communicate with each other. A casing of the indoor unit includes an accommodating chamber that is isolated from the blowout flow passage and communicates with a suction flow passage that causes an air inlet and the heat exchanger to communicate with each other. The drive motor is accommodated in the accommodating chamber.

Description

TECHNICAL FIELD

The present disclosure relates to an indoor unit of an air-conditioning apparatus embedded in or suspended from a ceiling located above an air-conditioned space, and more particularly to a structure of an airflow adjusting unit.

BACKGROUND ART

In an existing air-conditioning apparatus, an indoor unit is embedded in or suspended from a ceiling located above an air-conditioned space. As existing indoor units installed in such a manner, for example, the following indoor units are known. A given type of indoor unit includes an air inlet that is open at a substantially center portion of a lower surface of a casing, and four air outlets that are open in such a manner as to surround four sides of the air inlet in the lower surface, and can blow air subjected to heat exchange at a heat exchanger in four directions. Another type of indoor unit includes four air outlets and lateral airflow adjusting units that are provided in association with the respective four air outlets, and that adjust in a lateral direction, the angle of air blown from the air outlets (see, for example, Patent Literature 1).
To be more specific, blowout flow passages communicates with the air outlets, and allow air subjected to heat exchange at the heat exchanger to be sent to the air outlets. The lateral airflow adjusting units each include a plurality of lateral airflow adjusting plates arranged at defined intervals in the lateral direction in the blowout flow passages and a drive motor that swings the plurality of lateral airflow adjusting plates. The plurality of lateral airflow adjusting plates are swung, and inclination angles of the plurality of lateral airflow adjusting plates are changed, whereby the angle of the air blown from the air outlets can be adjusted in the lateral direction.

CITATION LIST

Patent Literature

Patent Literature 1: Japanese Unexamined Patent Application Publication No. 2003-194389

SUMMARY OF INVENTION

Technical Problem

In the indoor unit of the existing air-conditioning apparatus, drive motors of the lateral airflow adjusting units are arranged in such a manner as to communicate with the blowout flow passages. That is, in the indoor unit of the existing air-conditioning apparatus, the drive motors of the lateral airflow adjusting units are arranged such that they contact air subjected to heat exchange at the heat exchanger. Thus, for example, during a cooling operation, condensation occurs at a drive motor because of the difference between the temperature of air cooled at the heat exchanger and that of the drive motor heated. Also, for example, during a heating operation, the drive motor is heated by air heated at the heat exchanger. As a result, the temperature of the drive motor rises. In such a manner, in the indoor unit of the existing air-conditioning apparatus, the temperature of the air subjected to heat exchange at the heat exchanger affects the drive motors of the lateral airflow adjusting units, thereby worsening the durability of the drive motors.
The present disclosure is applied to solve the above problem, and relates to an indoor unit of an air-conditioning apparatus that can ensure the durability of drive motors of lateral airflow adjusting units.

Solution to Problem

An indoor unit of an air-conditioning apparatus according to the present disclosure includes: a casing having an air inlet and an air outlet that are provided as openings formed in a lower surface portion of the casing; a fan housed in the casing to suction air in an air-conditioned space from the air inlet into the casing and blow the air from the air outlet; a heat exchanger housed in the casing to cause heat exchange to be performed between refrigerant that flows in the heat exchanger and the air sucked into the casing; and a lateral airflow adjusting unit that adjusts in a lateral direction, adjust the angle of air that is blown from the air outlet. In the casing, a suction flow passage and a blowout flow passage are provided. The suction flow passage causes the air inlet and the heat exchanger to communicate with each other, and the blowout flow passage causes the heat exchanger and the air outlet to communicate with each other. The lateral airflow adjusting unit includes a plurality of lateral airflow adjusting plates that are arranged in the blowout flow passage at defined intervals in the lateral direction, and a drive device that includes a drive motor and swing the plurality of lateral airflow adjusting plates with power generated by the drive motor. The casing includes a accommodating chamber isolated from the blowout flow passage and communicating with the suction flow passage. The drive motor is accommodated in the accommodating chamber.

Advantageous Effects of Invention

The indoor unit of an air-conditioning apparatus according to the present disclosure can prevent the drive motor of the lateral adjusting unit from being affected by the temperature of air subjected to heat exchange at the heat exchanger. Thus, the indoor unit of the air-conditioning apparatus according to the present disclosure can ensure the durability of the drive motor of the lateral airflow adjusting unit.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a perspective view illustrating an entire indoor unit of an air-conditioning apparatus according to Embodiment 1 of the present disclosure, as viewed from obliquely below.

FIG. 2 is a vertical sectional view of the entire indoor unit of an air-conditioning apparatus according to Embodiment 1 of the present disclosure.

FIG. 3 is a bottom view illustrating the indoor unit of an air-conditioning apparatus according to Embodiment 1 of the present disclosure, with a decorative panel removed.

FIG. 4 is an exploded perspective view illustrating the indoor unit of an air-conditioning apparatus according to Embodiment 1 of the present disclosure, with the decorative panel removed, as viewed from obliquely below.

FIG. 5 is a sectional view taken along line A-A in FIG. 3.

FIG. 6 is a perspective view illustrating the indoor unit of an air-conditioning apparatus according to Embodiment 1 of the present disclosure, with the decorative panel removed, as viewed from obliquely below, and also illustrating the vicinity of a drive motor of a lateral airflow adjusting unit.

FIG. 7 is an exploded perspective view illustrating the indoor unit of an air-conditioning apparatus according to Embodiment 1 of the present disclosure, with the decorative panel removed, as viewed from obliquely below, and also illustrating the vicinity of the drive motor of the lateral airflow adjusting unit.

FIG. 8 is an enlarged view of related portions of another example of the indoor unit of an air-conditioning apparatus according to Embodiment 1 of the present disclosure.

FIG. 9 is a bottom view illustrating an indoor unit of an air-conditioning apparatus according to Embodiment 2 of the present disclosure, with a decorative panel removed.

FIG. 10 is an exploded perspective view illustrating the indoor unit of an air-conditioning apparatus according to Embodiment 2 of the present disclosure, with the decorative panel removed, as viewed from obliquely below.

FIG. 11 is a perspective view illustrating the indoor unit of an air-conditioning apparatus according to Embodiment 2 of the present disclosure, with the decorative panel removed, as viewed from obliquely below, and also illustrating the vicinity of a drive motor of a lateral airflow adjusting unit.

FIG. 12 is an exploded perspective view of the indoor unit of an air-conditioning apparatus according to Embodiment 2 of the present disclosure, with the decorative panel removed, as viewed from obliquely below, and also illustrating the vicinity of the drive motor of the lateral airflow adjusting unit.

FIG. 13 is a sectional view taken along line B-B in FIG. 9.

DESCRIPTION OF EMBODIMENTS

Embodiments of an air-conditioning apparatus according to the present disclosure will be described in detail.

Embodiment 1

FIG. 1 is a perspective view illustrating an entire indoor unit of an air-conditioning apparatus according to Embodiment 1 of the present disclosure, as viewed from obliquely below. FIG. 2 is a vertical sectional view of the entire indoor unit of the air-conditioning apparatus according to Embodiment 1 of the present disclosure.
An indoor unit 100 of an air-conditioning apparatus according to Embodiment 1 is embedded in or suspended from a ceiling located above an air-conditioned space such as a room. The indoor unit 100 includes a casing 1 having an air inlet 2 and air outlets 3 that are provided as openings formed in a lower surface portion of the casing 1. It should be noted that in Embodiment 1, for example, four air outlets 3 are formed. The casing 1 is, for example, a hollow box having a substantially rectangular cuboid shape. The air inlet 2 is open, for example, in a substantially center portion of the lower surface portion of the casing 1. The four air outlets 3 are located in such a manner as to surround four sides of the air inlet 2. Each of the air outlets 3 is, for example, rectangular, and is provided such that long sides of each air outlet 3 extend along an associated one of sides of the lower surface portion of the casing 1. The air inlet 2 includes a suction grille 2 a and a filter 9.
In the casing 1, a fan 6 is provided to face the air inlet 2, and is a centrifugal fan such as a turbo fan. For example, as viewed in plan view, a central axis of the fan 6 is located at substantially the same position as the center of the air inlet 2. The fan 6 sucks air in the air-conditioned space from the air inlet 2 into the casing 1, and blows the air from the air outlets 3. In the casing 1, a heat exchanger 7, which is, for example, of a fin-and-tube type, is also provided to surround the fan 6. The heat exchanger 7 causes heat exchange to be performed between refrigerant that flows in the heat exchanger 7 and air in the air-conditioned space that is sucked into the casing 1 by the fan 6.
The heat exchanger 7 is located outward of the air inlet 2 and inward of the air outlets 3, as viewed in plan view. To be more specific, the casing 1 includes a suction flow passage 4 through which the air inlet 2 and the heat exchanger 7 communicate with each other, and blowout flow passages 5 through which the heat exchanger 7 and the air outlets 3 communicate with each other. Thus, the fan 6 is rotated to cause air in the air-conditioned space to be sucked into the casing 1 from the air inlet 2 and to flow into the heat exchanger 7 through the suction flow passage 4, as suction air 101 and blowout air 102 indicated by arrows in FIG. 2. Also, the air in the air-conditioned space that has flowed into the heat exchanger 7 exchanges heat with refrigerant that flows through a refrigerant flow passage in the heat exchanger 7, and is provided as conditioned air. The conditioned air passes through the blowout flow passages 5, and is blown from the air outlets 3 to the air-conditioned space.
In Embodiment 1, since the number of the air outlets 3 is four, that of the blowout flow passages 5 is also four. Each blowout flow passage 5, as well as each air outlet 3, has, for example, a rectangular cross section, and is located such that long sides of each blowout flow passage 5 extend along an associated one of the sides of the lower surface portion of the casing 1. The indoor unit 100 according to Embodiment 1 also includes a bell mouth 8 between the air inlet 2 and the fan 6, and the bell mouth 8 guides to the fan 6, the air in the air-conditioned space that is sucked from the air inlet 2 into the suction flow passage 4.
In the indoor unit 100 according to Embodiment 1, in each of the blowout flow passages 5, a vertical airflow adjusting plate 51 and a plurality of lateral airflow adjusting plates 41 are provided in such a manner as to be swingable and also provided to adjust the angle of conditioned air that is blown from an associated one of the air outlets 3.
The vertical airflow adjusting plate 51 adjusts in a vertical direction, the angle of the conditioned air that is blown from the associated air outlet 3. The vertical airflow adjusting plate 51 extends in the longitudinal direction of the blowout flow passage 5. The vertical airflow adjusting plate 51 is swung in the vertical direction around its rotation axis extending in the longitudinal direction of the blowout flow passage 5. This swinging operation of the vertical airflow adjusting plate 51 in the vertical direction can be performed by a drive device such as a drive motor. Thus, as an outer peripheral end of the vertical airflow adjusting plate 51 moves more upwards, the angle between a direction in which the conditioned air is blown from the air outlet 3 and a horizontal direction decreases. Furthermore, as the outer peripheral end of the vertical airflow adjusting plate 51 moves more downwards, the conditioned air is blown more downwards from the air outlet 3.
The plurality of lateral airflow adjusting plates 41 form a lateral airflow adjusting unit 40, which will be described later. The lateral airflow adjusting unit 40 adjusts in the lateral direction, the angle of the conditioned air that is blown from the associated air outlet 3. To be more specific, in the air outlets 3, respective lateral airflow adjusting units 40 are provided. The plurality of lateral airflow adjusting plates 41 of each of the lateral airflow adjusting units 40 are arranged in an associated blowout flow passage 5 at defined intervals in the longitudinal direction (lateral direction) of the blowout flow passage 5. The lateral airflow adjusting plates 41 are arranged in the blowout flow passage 5 such that they are swingable. For example, lower ends of the lateral airflow adjusting plates 41 are swung in the lateral direction. Then, the conditioned air that is blown from the air outlet 3 is curved and blown in a direction in which the lower ends of the lateral airflow adjusting plates 41 are moved. The lateral airflow adjusting plates 41 are swung by power generated by a drive motor 45 of the lateral airflow adjusting unit 40, which will be described later. Also, the lateral airflow adjusting unit 40 will be described later in detail.
In Embodiment 1, an indoor unit body 10, a lateral airflow casement 20, and a decorative panel 30 form the casing 1.
The indoor unit body 10 is, for example, a box formed in the shape of a substantially rectangular cuboid that has chamfered corners as viewed in plan view. The indoor unit body 10 houses the fan 6, the heat exchanger 7, and the bell mouth 8. In the indoor unit body 10, a first suction flow passage 14 and first blowout flow passages 15 are provided. The first suction flow passage 14 forms part of the suction flow passage 4, and the first blowout flow passages 15 form part of the respective blowout flow passages 5. An end of the first suction flow passage 14 that is located opposite to the heat exchanger 7 is open, for example, in a substantially center portion of a lower surface portion of the indoor unit body 10. Ends of the first blowout flow passages 15 that are located opposite to the heat exchanger 7 are open in the lower surface portion of the indoor unit body 10 such that the ends of the first blowout flow passages 15 surround four sides of an opening portion of the first suction flow passage 14. At an outer periphery of the indoor unit body 10, fittings 11 are provided, and are used when the indoor unit body 10 is suspended from the ceiling located above the air-conditioned space.
The lateral airflow casement 20 is attached to a lower portion of the indoor unit body 10. The lateral airflow casement 20 has substantially the same shape as the indoor unit body 10 as viewed in plan view. To be more specific, the lateral airflow casement 20 is formed in the shape of a substantially rectangular cuboid that has chamfered corners as viewed in plan view. In the lateral airflow casement 20, a second suction flow passage 24 and second blowout flow passages 25 are formed. The second suction flow passage 24 forms part of the suction flow passage 4 and communicates with the first suction flow passage 14. The second suction flow passage 24 is a through hole formed in a substantially center portion of the lateral airflow casement 20 as viewed in plan view. The second blowout flow passages 25 form part of the blowout flow passages 5 and communicate with the first blowout flow passages 15. The second blowout flow passage 25 are through holes arranged in such a manner as to surround four sides of the second suction flow passage 24 as viewed in plan view.
Sealants 91 are provided on an upper surface portion of the lateral airflow casement 20. The sealant 91 is intended to isolate the suction flow passage 4 (the first suction flow passage 14 and the second suction flow passage 24) from the blowout flow passages 5 (the first blowout flow passages 15 and the second blowout flow passages 25) when the lateral airflow casement 20 is secured to the indoor unit body 10.
In Embodiment 1, the lateral airflow adjusting units 40, which will be described later, are provided in the lateral airflow casement 20. To be more specific, the lateral airflow adjusting plates 41 are arranged in the second blowout flow passages 25 such that they can be swung.
The decorative panel 30 is attached to a lower portion of the lateral airflow casement 20, and is, for example, a plate having a substantially rectangular shape. To be more specific, the decorative panel 30 forms the lower surface portion of the casing 1. The decorative panel 30 includes the air inlet 2, a third suction flow passage 34, third blowout flow passages 35, and the air outlets 3. The third suction flow passage 34 forms part of the suction flow passage 4 and communicates with the second suction flow passage 24 and the air inlet 2. The third suction flow passage 34 is a through hole formed in a substantially center portion of the decorative panel 30 as viewed in plan view. The third blowout flow passages 35 form part of the blowout flow passages 5 and communicates with the second blowout flow passage 25 and the air outlets 3. The third blowout flow passages 35 are through holes arranged in such a manner as to surround four sides of the third suction flow passage 34 as viewed in plan view.
Sealants 92 are provided on an upper surface portion of the decorative panel 30. The sealants 92 are intended to separate the suction flow passage 4 (the second suction flow passage 24 and the third suction flow passage 34) from the blowout flow passages 5 (the second blowout flow passages 25 and the third blowout flow passages 35) when the decorative panel 30 is secured to the lateral airflow casement 20.
In Embodiment 1, the vertical airflow adjusting plates 51 as described above are provided in the third blowout flow passages 35 such that they can be swung. Drive devices 52 that swing the respective vertical airflow adjusting plates 51 are provided on the decorative panel 30.
The indoor unit of the air-conditioning apparatus embedded in or suspended from the ceiling located above the air-conditioned space may be sometimes required not to include the lateral airflow adjusting units 40 in terms of cost reduction, etc. In such a case, from the indoor unit including the lateral airflow adjusting units, the lateral airflow adjusting units are removed. That is, the housing can be applied to both the case the lateral airflow adjusting units are necessary and the case where the lateral airflow adjusting units are not necessary. Thus, also in the indoor unit 100 according to Embodiment 1, the lateral airflow adjusting units 40 are removed when they are not necessary.
In the case where the indoor unit body 10 and the lateral airflow casement 20 are formed integrally with each other, that is, the lower part of the indoor unit body 10 is extended and is used as the lateral airflow casement 20, the lateral airflow adjusting units 40 are provided in the indoor unit body 10. In such a case, in the case where the lateral airflow adjusting units 40 are removed from the indoor unit 100, space is made in the indoor unit body 10. Thus, in the case where the lateral airflow adjusting units 40 are not necessary, the indoor unit body 10 formed integrally with the lateral airflow casement 20 is large in size more than necessary. That is, in the case where the indoor unit body 10 and the lateral airflow casement 20 are formed integrally with each other and the lateral airflow adjusting units 40 are not necessary, the indoor unit 100 is large in size more than necessary.
By contrast, in the indoor unit 100 according to Embodiment 1, the indoor unit body 10 and the lateral airflow casement 20 are formed as separate elements, and the lateral airflow adjusting units 40 are provided in the lateral airflow casement 20 as described above. Thus, in the indoor unit 100 according to Embodiment 1, in the case where the lateral airflow adjusting units 40 are not necessary, it suffices that the lateral airflow casement 20 is removed and the decorative panel 30 is attached to the lower part of the indoor unit body 10. Thereby, the indoor unit 100 is prevented from being large in size more than necessary in the case where the lateral airflow adjusting units 40 are not necessary.
Next, the lateral airflow adjusting units 40 will be described in detail.
FIG. 3 is a bottom view illustrating the indoor unit of an air-conditioning apparatus according to Embodiment 1 of the present disclosure, with the decorative panel removed. FIG. 4 is an exploded perspective view illustrating the indoor unit of an air-conditioning apparatus according to Embodiment 1 of the present disclosure, with the decorative panel removed, as viewed from obliquely below. FIG. 5 is a sectional view taken along line A-A in FIG. 3. FIG. 6 is a perspective view illustrating the indoor unit of the air-conditioning apparatus according to Embodiment 1 of the present disclosure, with the decorative panel removed, as viewed from obliquely below, and also illustrating the vicinity of a drive motor of a lateral airflow adjusting unit. FIG. 7 is an exploded perspective view illustrating the indoor unit of the air-conditioning apparatus according to Embodiment 1 of the present disclosure, with the decorative panel removed, as viewed from obliquely below, and also illustrating the vicinity of the drive motor of the lateral airflow adjusting unit. FIG. 4 illustrates the lateral airflow casement 20 to which two of four lateral airflow adjusting units 40 are attached, but remaining two of the four lateral airflow adjustment units 40 are not attached. In FIG. 5, a drive device 44 of a lateral airflow adjusting unit 40 is illustrated, but the shape of the drive device 44 illustrated is not a cross section of the drive device 44.
Each of the lateral airflow adjusting units 40 includes the lateral airflow adjusting plates 41 as described above, a support base 42, a coupling member 43, and the drive device 44. The lateral airflow adjusting plates 41 are supported at a side surface portion of the support base 42 such that it can be swung. The support base 42 is attached to the lateral airflow casement 20 in the longitudinal direction of the second blowout flow passage 25. Because of the support base 42 is attached to the lateral airflow casement 20, the lateral airflow adjusting plates 41 are provided in the second blowout flow passage 25. In this case, in the second blowout flow passage 25, the lateral airflow adjusting plates 41 are located closer to an outer peripheral side of the lateral airflow casement 20 than the support base 42. In other words, in the second blowout flow passage 25, the support base 42 is located closer to an inner peripheral side of the lateral airflow casement 20 than the lateral airflow adjusting plates 41, that is, it is located closer to the second suction flow passage 24 than the lateral airflow adjusting plates 41.
The lateral airflow adjusting plates 41 are coupled to each other by the coupling member 43. The coupling member 43 is also connected to the drive device 44. In Embodiment 1, the coupling member 43 includes a first coupling member 43 a that couples the lateral airflow adjusting plates 41 to each other, and a second coupling member 43 b that couples the first coupling member 43 a and the drive device 44 to each other.
The drive device 44 includes the drive motor 45 and a power transmission mechanism 46 that connects the drive motor 45 and the second coupling member 43 b. The power transmission mechanism 46 is, for example, a gear, and transmits power generated by the drive motor 45 to the second coupling member 43 b. To be more specific, when the drive motor 45 is rotated, a rotational power generated thereby is transmitted to the lateral airflow adjusting plates 41 by the power transmission mechanism 46 and the coupling member 43. Specifically, when the drive motor 45 is rotated in a certain rotational direction, lower end portions of the lateral airflow adjusting plates 41 are moved in a certain single direction. When the drive motor 45 is rotated in the opposite direction to the rotational direction, the lower end portions of the lateral airflow adjusting plates 41 are moved in the opposite direction to the above certain single direction. The drive device 44 having the above configuration is attached to the support base 42.
When the drive device 44 is attached to the support base 42, the drive motor 45 protrudes from the power transmission mechanism 46 toward the inner peripheral side of the lateral airflow casement 20 as viewed in plan view. In other words, as the drive motor 45 is viewed with respect to part of the support base 42 that supports the lateral airflow adjusting plates 41, the drive motor 45 protrudes from the above part of the support base 42 toward the inner peripheral side of the lateral airflow casement 20. A lid 47 is provided on a lower portion of the drive device 44.
The lateral airflow casement 20 includes accommodating chambers 21 on lateral sides of the respective second blowout flow passages 25. In other words, the accommodating chambers 21 are provided at respective corners of the lateral airflow casement 20 as the lateral airflow casement 20 is viewed from below. Furthermore, in other words, the accommodating chambers 21 are provided at the corners of the casing 1 as the housing 1 is viewed from the lower surface portion. The accommodating chambers 21 house the respective drive devices 44 when the lateral airflow adjusting units 40 are attached to the lateral airflow casement 20. The accommodating chambers 21 are recesses which are open on their lower side. The accommodating chambers 21 communicate with side end portions of the respective second blowout flow passages 25 when the drive devices 44 are not accommodated in the accommodating chambers 21.
By contrast, when a drive device 44 is accommodated in an associated accommodating chamber 21, as illustrated in FIG. 5, the accommodating chamber 21 is partitioned into a second accommodating chamber 21 b and a first accommodating chamber 21 a that accommodates the drive motor 45, by the power transmission mechanism 46, the lid 47, and a wall portion 42 a of the support base 42 that surrounds the drive motor 45. Thereby, the first accommodating chamber 21 a that accommodates the drive motor 45 is isolated from the second accommodating chamber 21 b that communicates with the second blowout flow passage 25. That is, the first accommodating chamber 21 a is isolated from the blowout flow passage 5. At the support base 42, a sealant 42 b is provided at part of the support base 42 where airtightness needs to be ensured, such as space between the wall portion 42 a of the support base 42 and an inner peripheral wall of the accommodating chamber 21. Also, at the lid 47, a sealant 47 a is provided at part of the lid 47 where airtightness needs to be ensured, such as the vicinity of an opening portion of the accommodating chamber 21 and the lid 47. It should be noted that with respect to the wall portion 42 a, FIG. 7 should also be referred to.
In this case, the lid 47 covers a lower opening of the accommodating chamber 21 such that only part of the lower opening that corresponds to the flow passage 22 is still open; that is, the part is not covered. The sealant 92 is provided between a lower surface portion of the lateral airflow casement 20 and an upper surface portion of the decorative panel 30 in such a manner as to surround an outer periphery of the second blowout flow passage 25, as indicated as a location range 92 a by a two-dot chain line in FIG. 3. Thus, the flow passage 22 is not covered with the sealant 92. Thus, the first accommodating chamber 21 a that accommodates the drive motor 45 communicates with the suction flow passage 4. To be more specific, the lateral airflow casement 20 that is part of the casing 1 includes the first accommodating chamber 21 a isolated from the blowout flow passage 5 and communicating with the suction flow passage 4. The drive motor 45 is accommodated in the first accommodating chamber 21 a.
The first accommodating chamber 21 a corresponds to the accommodating chamber of the present disclosure.
The flow passage that causes the first accommodating chamber 21 a and the suction flow passage 4 to communicate with each other is not limited to the flow passage 22. For example, a through hole or a groove that causes the first accommodating chamber 21 a and the suction flow passage 4 to communicate with each other may be formed in at least one of the lateral airflow casement 20 and the decorative panel 30 to serve as a flow passage that causes the first accommodating chamber 21 a and the suction flow passage 4 to communicate with each other.
In order to form the lateral airflow adjusting unit 40 having the above configuration, first, the lateral airflow adjusting plates 41, the support base 42, the coupling member 43, and the drive device 44 are assembled into a single component. Then, the support base 42 is removably attached to the lateral airflow casement 20, for example, by screwing. To be more specific, the lateral airflow adjusting unit 40 of Embodiment 1 is removable as the assembled single component from the lateral airflow casement 20. For example, if the inside of the blowout flow passage 5 is soiled with, for example, dust, there is a case where the lateral airflow adjusting unit 40 must be removed to clean the inside of the blowout flow passage 5. In this case, in the indoor unit 100 according to Embodiment 1, the lateral airflow adjusting unit 40 can be removed as the assembled single component from the lateral airflow casement 20. It is therefore possible to improve the cleanability. Also, in the indoor unit 100 according to Embodiment 1, for example, if the lateral airflow adjusting plate 41 is damaged, the lateral airflow adjusting unit 40 can be removed as the assembled single component from the lateral airflow casement 20 in order that the lateral airflow adjusting plate 41 be replaced by a new one. In such a manner, in the indoor unit 100 according to Embodiment 1, the lateral airflow adjusting unit 40 can be attached to and removed as the assembled single body from the lateral airflow casement 20, thereby improving the maintainability.
Next, the operation of the indoor unit 100 according to Embodiment 1 will be described.
As the suction air 101 and the blowout air 102 indicated by arrows in FIG. 2, when the fan 6 is rotated, air in the air-conditioned space is sucked from the air inlet 2 into the casing 1 and flows into the heat exchanger 7 through the suction flow passage 4. Then, when passing through the heat exchanger 7, the air in the air-conditioned space that has flowed into the heat exchanger 7 exchanges heat with the refrigerant that flows through the refrigerant flow passage in the heat exchanger 7 and is thus conditioned. The conditioned air passes through the blowout flow passage 5, and is blown into the air-conditioned space from the air outlets 3.
In this case, the angle of the conditioned air that is blown from the air outlet 3 can be adjusted in the vertical direction by adjusting the inclination angle of the vertical airflow adjusting plate 51. Also, the angle of the conditioned air that is blown from the air outlet 3 can be adjusted in the lateral direction by adjusting the inclination angle of the lateral airflow adjusting plate 41. That is, by adjusting the inclination angles of the vertical airflow adjusting plate 51 and the lateral airflow adjusting plate 41, it is possible to adjust the angle of the conditioned air that is blown from the air outlet 3, in the vertical and lateral directions, to set the angle to an arbitrary angle.
The inclination angles of the vertical airflow adjusting plate 51 and the lateral airflow adjusting plate 41 may be fixed to fix the angle of the conditioned air that is blown from the air outlet 3. The vertical airflow adjusting plate 51 and the lateral airflow adjusting plate 41 may be continuously moved to continuously change the inclination angles of the vertical airflow adjusting plate 51 and the lateral airflow adjusting plates 41. Furthermore, as a whole, the vertical airflow adjusting plates 51 provided in the respective blowout flow passages 5 may be operated independently of each other, or operated in coordination with each other. Also, the lateral airflow adjusting plates 41 provided in the respective blowout flow passages 5 may be also operated independently of each other, or operated in interlock with each other.
As described above, in the indoor unit 100 according to Embodiment 1, the drive motor 45 of the lateral airflow adjusting unit 40 is provided in the first accommodating chamber 21 a that is isolated from the blowout flow passage 5 and communicates with the suction flow passage 4. Thus, during the cooling operation, the drive motor 45 is not directly exposed to air cooled at the heat exchanger 7. Therefore, in the indoor unit 100 according to Embodiment 1, condensation water can be prevented from being generated at the drive motor 7 because of the difference in temperature between the air cooled by the heat exchanger 7 and the drive motor 45 heated. Also, during the heating operation, the drive motor 45 is not directly exposed to the air heated by the heat exchanger 7. Also, during the heating operation, the drive motor 45 is cooled by the air sucked into the suction flow passage 4. Thus, in the indoor unit 100 according to Embodiment 1, the temperature of the drive motor 45 can be prevented from being raised by the air heated by the heat exchanger 7.
In such a manner, in the indoor unit 100 according to Embodiment 1, it is possible to prevent the drive motor 45 from being affected by the temperature of the air subjected to heat exchange at the heat exchanger 7. Thus, the indoor unit 100 according to Embodiment 1 can ensure the durability of the drive motor 45. This advantage is not an advantage obtained only in the case where the indoor unit body 10, the lateral airflow casement 20, and the decorative panel 30 form the casing 1. For example, the advantage can also be obtained in the case where the indoor unit body 10 and the lateral airflow casement 20 are formed integrally with each other to form the casing 1. That is, it suffices that in the casing 1, the first accommodating chamber 21 a is provided in such a manner as to be isolated from the blowout flow passage 5 and communicate with the suction flow passage 4. In this first accommodating chamber 21 a, the drive motor 45 is provided. Because of this configuration, the above advantage can be obtained.
As described above, the indoor unit 100 according to Embodiment 1 includes the casing 1 having the air inlet 2 and the air outlets 3 that are provided as openings formed in the lower surface portion of the casing 1. The indoor unit 100 according to Embodiment 1 includes the fan 6, the heat exchanger 7, and the lateral airflow adjusting units 40. The fan 6 is provided in the casing 1 to suck air in the air-conditioned space from the air inlet 2 into the casing 1, and blow air from the air outlets 3. The heat exchanger 7 is provided in the casing 1 to cause heat exchange to be performed between the refrigerant that flows in the heat exchanger 7 and the air sucked into the casing 1. The lateral airflow adjusting units 40 adjust the angle of the air that is blown from the air outlets 3, in the lateral direction. To be more specific, the casing 1 includes the suction flow passage 4 that causes the air inlet 2 and the heat exchanger 7 to communicate with each other, and the blowout flow passages 5 that causes the heat exchanger 7 and the air outlets 3 to communicate with each other. The lateral airflow adjusting units 40 each includes the plurality of lateral airflow adjusting plates 41 that are arranged in an associated one of the blowout flow passages 5 at defined intervals in the lateral direction, and the drive device 44 that includes the drive motor 45 and swings the plurality of lateral airflow adjusting plates 41 with power generated by the drive motor 45. The casing 1 includes the first accommodating chambers 21 a that are isolated from the respective blowout flow passages 5 and communicate with the suction flow passage 4. The drive motor 45 is accommodated in the first accommodating chamber 21 a.
In the indoor unit 100 having the above configuration, the drive motor 45 can be prevented from being affected by the temperature of the air subjected to heat exchange at the heat exchanger 7. Thus, the indoor unit 100 according to Embodiment 1 can ensure the durability of the drive motor 45.
Furthermore, in the indoor unit 100 according to Embodiment 1, the first accommodating chambers 21 a are provided at the respective corners of the casing 1 as the casing 1 is viewed from the lower surface portion side. The corners of the casing 1 are portions where it is hard to provide components of the indoor unit 100. Therefore, in Embodiment 1, since the first accommodating chambers 21 a are provided at the respective corners of the casing 1 and accommodate the respective drive motors 45, the corners of the casing 1 can be effectively used.
As illustrated in, for example, FIG. 8, the lateral airflow adjusting unit 40 may include a heat insulating material 93 between a component located in a region that communicates with the blowout flow passage 5 and a component located in a region that communicates with the suction flow passage 4.
FIG. 8 is an enlarged view of a related portion of another example of the indoor unit of the air-conditioning apparatus according to Embodiment 1 of the present disclosure. FIG. 8 illustrates a section taken at the same position as in FIG. 5.
In the indoor unit 100 as illustrated in FIG. 8, the lateral airflow adjusting unit 40 includes the heat insulating material 93 between the power transmission mechanism 46 and the drive motor 45. The heat insulating material 93 is formed of, for example, urethane foam.
As described above, the second accommodating chamber 21 b communicates with the second blowout flow passage 25 that forms part of the blowout flow passage 5. The power transmission mechanism 46 of the lateral airflow adjusting unit 40 is accommodated in the second accommodating chamber 21 b. Thus, the power transmission mechanism 46 is cooled by air cooled at the heat exchanger 7 during the cooling operation. The power transmission mechanism 46 is heated by air heated at the heat exchanger 7 during the heating operation. In the lateral airflow adjusting unit 40 as illustrated in FIG. 5, the power transmission mechanism 46 and the drive motor 45 are directly connected to each other. Thus, because of heat exchange between the power transmission mechanism 46 and the drive motor 45, the drive motor 45 is slightly affected by the temperature of air subjected to heat exchange at the heat exchanger 7. By contrast, in the lateral airflow adjusting unit 40 as illustrated in FIG. 8, the heat insulating material 93 can prevent heat exchange between the power transmission mechanism 46 and the drive motor 45. Thus, the lateral airflow adjusting unit 40 is configured as illustrated in FIG. 8, thereby further reliably preventing the drive motor 45 from being affected by the temperature of the air subjected to heat exchange at the heat exchanger 7. Thus, the configuration of the lateral airflow adjusting unit 40 as illustrated in FIG. 8 can further reliably ensure the durability of the drive motor 45.

Embodiment 2

The position of the accommodating chamber 21 that accommodates the drive motor 45 of the lateral airflow adjusting unit 40 is not limited to the position as described regarding Embodiment 1. For example, the accommodating chamber 21 may be provided at a position as described below regarding Embodiment 2. It should be noted that in Embodiment 2, matters not described regarding Embodiment 2 and described regarding Embodiment 1 are the same as those described in Embodiment 1, and in the descriptions regarding Embodiment 2, functions and components that are the same as in Embodiment 1 will be denoted by the same reference signs.
FIG. 9 is a bottom view illustrating an indoor unit of an air-conditioning apparatus according to Embodiment 2 of the present disclosure, with a decorative panel removed. FIG. 10 is an exploded perspective view illustrating the indoor unit of an air-conditioning apparatus according to Embodiment 2 of the present disclosure, with the decorative panel removed, as viewed from obliquely below. FIG. 11 is a perspective view illustrating the indoor unit of the air-conditioning apparatus according to Embodiment 2 of the present disclosure, with the decorative panel removed, as viewed from obliquely below, and illustrates the vicinity of a drive motor of a lateral airflow adjusting unit. FIG. 12 is an exploded perspective view illustrating the indoor unit of the air-conditioning apparatus according to Embodiment 2 of the present disclosure, with the decorative panel removed, as viewed from obliquely below, and illustrates the vicinity of the drive motor of the lateral airflow adjusting unit. FIG. 13 is a sectional view taken along line B-B in FIG. 9. FIG. 10 illustrates a state where two of four lateral airflow adjusting units 40 are attached, but the other two of the four lateral airflow are not attached.
In an indoor unit 100 according to Embodiment 2, each of the accommodating chambers 21 is provided between an associated second blowout flow passage 25 and the second suction flow passage 24 as the lateral airflow casement 20 is viewed from below. In other words, each accommodating chamber 21 is provided between an associated blowout flow passage 5 and the suction flow passage 4 as the casing 1 is viewed from a lower surface portion side thereof. When a drive device 44 is not provided in an associated accommodating chamber 21, an outer peripheral side portion of the accommodating chamber 21 communicates with an inner peripheral side portion of the second blowout flow passage 25. An inner peripheral side surface of the accommodating chamber 21 communicates with the second suction flow passage 24. It should be noted that in Embodiment 2, plate members 28 are provided to face the inner peripheral side surfaces of the accommodating chambers 21. The plate members 28 prevents, for example, an operator from touching the drive motors 45 accommodated in the respective accommodating chambers 21, and do not close spaces between the accommodating chambers 21 and the second suction flow passage 24. Thus, as illustrated in FIGS. 11 and 13, flow passages 22 that cause the accommodating chambers 21 and the second suction flow passage 24 to communicate with each other are ensured.
In each of the lateral airflow adjusting units 40 according to Embodiment 2, the drive motor 45 and the power transmission mechanism 46 that forms the drive device 44 are located closer to an inner peripheral side of the lateral airflow casement 20 than part of the support base 42 that supports the lateral airflow adjusting plate 41.
The support base 42 has a wall 42 c that protrudes toward the second suction flow passage 24. An outer peripheral surface of the wall 42 c is shaped in accordance with the shape of an inner peripheral surface 21 c of an opening portion of the accommodating chamber 21 that is located closer to the second blowout flow passage 25. The power transmission mechanism 46 has a wall 46 a that protrudes toward the second blowout flow passage 25. An outer peripheral surface of the wall 42 c, as well as the wall 42 c, is shaped in accordance with the shape of the inner peripheral surface 21 c of the opening port of the accommodating chamber 21 that is located closer to the second blowout flow passage 25. A distal end of the wall 42 c of the accommodating chamber 21 is in contact with a distal end of the wall 46 a of the power transmission mechanism 46. With the drive device 44 accommodated in the accommodating chamber 21, the wall 42 c of the support base 42 and the wall 46 a of the power transmission mechanism 46 are in contact with the inner peripheral surface 21 c of the opening portion of the accommodating chamber 21 that is closer to the second blowout flow passage 25. Thereby, the second blowout flow passage 25 is isolated from the accommodating chamber 21. That is, the accommodating chamber 21 is isolated from the blowout flow passage 5. Thus, the drive motor 45 of the drive device 44 is isolated from the second blowout flow passage 25, that is, the blowout flow passage 5, and is accommodated in the accommodating chamber 21 that communicates with the suction flow passage 4.
In Embodiment 2, the accommodating chamber 21 corresponds to the accommodating chamber of the present disclosure.
In Embodiment 2, in order to improve the airtightness between the wall 42 c of the support base 42 and the wall 46 a of the power transmission mechanism 46 and the inner peripheral surface 21 c of the accommodating chamber 21, a sealant 48 is provided between the wall portions 42 c and 46 a and inner peripheral surface 21 c. Furthermore, in Embodiment 2, a sealant 42 d is provided between the inner peripheral surface of the second blowout flow passage 25 and the support base 42 to improve the airtightness between the inner peripheral surface and the support base 42.
As described above, in the indoor unit 100 according to Embodiment 2, the drive motor 45 is accommodated in the accommodating chamber 21 that is isolated from the second blowout flow passage 25, that is, the blowout flow passage 5, and communicates with the suction flow passage 4. Thus, as in Embodiment 1, in the indoor unit 100 according to Embodiment 2 also, it is possible to prevent can also prevent the drive motor 45 from being affected by the temperature of air subjected to heat exchange at the heat exchanger 7. Thus, the indoor unit 100 according to Embodiment 2 can also ensure the durability of the drive motor 45 as in Embodiment 1.
In the indoor unit 100 according to Embodiment 2, the accommodating chamber 21 is provided closer to the suction flow passage 4 than in Embodiment 1. Thus, air in the accommodating chamber 21 of the indoor unit 100 according to Embodiment 2 is easily sucked by a fan 6 when the fan 6 is rotated, as compared with the first accommodating chamber 21 a of Embodiment 1. Thus, the accommodating chamber 21 of the indoor unit 100 according to Embodiment 2 is located such that heat generated by the drive motor 45 cannot easily stay in the accommodating chamber 21 of the indoor unit 100, as compared with the first accommodating chamber 21 a of Embodiment 1, thereby restricting an increase in the temperature of the drive motor 45. Therefore, the indoor unit 100 according to Embodiment 2 can also further improve efficiency of the drive motor 45 than the indoor unit 100 in Embodiment 1.
Also, as illustrated in FIG. 12, as in Embodiment 1, the lateral airflow adjusting unit 40 of Embodiment 2 includes a heat insulating material 93 between a component located in a region that communicates with the blowout flow passage 5 and a component located in a region that communicates with the suction flow passage 4.
Specifically, in the indoor unit 100 according to Embodiment 2, the support base 42 of the lateral airflow adjusting unit 40 isolates the accommodating chamber 21 and the blowout flow passage 5 from each other. That is, the support base 42 is the component located in the region that communicates with the blowout flow passage 5. In the lateral airflow adjusting unit 40 according to Embodiment 2, the drive motor 45 and the power transmission mechanism 46 are accommodated in the accommodating chamber 21. That is, the drive motor 45 and the power transmission mechanism 46 are the components located in the region that communicates with the suction flow passage 4. The heat insulating material 93 is provided between the support base 42 and the power transmission mechanism 46. To be more specific, as illustrated in FIG. 13, the heat insulating material 93 is provided in space surrounded by the wall 42 c of the support base 42 and the wall 46 a of the power transmission mechanism 46. Thus, as in Embodiment 1, the indoor unit 100 according to Embodiment 2 can further reliably prevent the drive device 45 from being affected by the temperature of the air subjected to heat exchange at the heat exchanger 7. Thus, the indoor unit 100 according to Embodiment 2 can further reliably ensure the durability of the drive motor 45 as in Embodiment 1.


Reference Signs List

1 casing,	2 air inlet,	2a suction	3 air outlet,
		grille,
4 suction	5 blowout flow	6 fan,	7 heat exchanger,
flow passage,	passage,
8 bell mouth,	9 filter,	10 indoor	11 fittings,
		unit body,
14 first suction	15 first	20 lateral	21 accommodating
flow passage,	blowout flow	airflow	chamber,
	passage,	casement,
21a first	21b second	21c inner	22 flow passage,
accommodating	accommodating	peripheral
chamber,	chamber,	surface,
24 second	25 second	28 plate	30 decorative
suction flow	blowout flow	member,	panel,
passage,	passage,
34 third suction	35 third	40 lateral	41 lateral
flow passage,	blowout flow	airflow	airflow
	passage,	adjusting unit,	adjusting plate,
42 support	42a wall		42b sealant,	42c wall,
base,	portion,
42d sealant,	43 coupling	43a first coupling	43b second coupling
	member,	member,	member,
44 drive	45 drive motor,	46 power	46a wall,
device,		transmission
		mechanism,
47 lid,	47a sealant,	48 sealant,	51 vertical airflow
			adjusting plate,
52 drive	91 sealant,	92 sealant,	92a location
device,			range,
93 heat	100 indoor	101 suction	102 blowout
insulating	unit,	air,	air
material,

Claims

1. An indoor unit of an air-conditioning apparatus, comprising:

a casing having an air inlet and an air outlet that are provided as openings formed in a lower surface portion of the casing;

a fan housed in the casing and configured to suck air in an air-conditioned space from the air inlet into the casing and blow the air from the air outlet;

a heat exchanger housed in the casing and configured to cause heat exchange to be performed between refrigerant that flows in the heat exchanger and the air sucked into the casing; and

a lateral airflow adjusting unit configured to adjust in a lateral direction, an angle of the air that is blown from the air outlet,

wherein in the casing, a suction flow passage and a blowout flow passage are provided, the suction flow passage causing the air inlet and the heat exchanger to communicate with each other, the blowout flow passage causing the heat exchanger and the air outlet to communicate with each other,

the lateral airflow adjusting unit includes

a plurality of lateral airflow adjusting plates arranged in the blowout flow passage at defined intervals in the lateral direction, and

a drive device including a drive motor and configured to swing the plurality of lateral airflow adjusting plates with power generated by the drive motor,

the casing includes an accommodating chamber that is isolated from the blowout flow passage and communicates with the suction flow passage, and

the drive motor is accommodated in the accommodating chamber.

2. The indoor unit of an air-conditioning apparatus of claim 1, wherein the accommodating chamber is located between the blowout flow passage and the suction flow passage as the casing is viewed from the lower surface portion.

3. The indoor unit of an air-conditioning apparatus of claim 1, wherein the accommodating chamber is provided at a corner of the casing as the casing is viewed from the lower surface portion.

4. The indoor unit of an air-conditioning apparatus of claim 1, wherein the lateral airflow adjusting unit includes a heat insulating material between a component located in a region that communicates with the blowout flow passage and a component located in a region that communicates with the suction flow passage.

5. The indoor unit of an air-conditioning apparatus of claim 1, wherein the lateral airflow adjusting unit includes a support base configured to support the plurality of lateral airflow adjusting plates in such a manner as to enable the plurality of lateral airflow adjusting plates to be swung, and

a coupling member configured to couple the plurality of lateral airflow adjusting plates to the drive device,

the drive device is attached to the support base, and

the lateral airflow adjusting unit is configured such that the support base is removably attached to the casing and thus the plurality of lateral airflow adjusting plates, the support base, the coupling member, and the drive device are removable from the casing, with the plurality of lateral airflow adjusting plates, the support base, the coupling member, and the drive device assembled as a single body.

6. The indoor unit of an air-conditioning apparatus of claim 1, wherein the casing includes

an indoor unit body including a first suction flow passage that forms part of the suction flow passage and a first blowout flow passage that forms part of the blowout flow passage, the indoor unit body housing the fan and the heat exchanger,

a lateral airflow casement attached to a lower portion of the indoor unit body, and including a second suction flow passage and a second blowout flow passage, the second suction flow passage forming part of the suction flow passage and communicating with the first suction flow passage, the second blowout flow passage forming part of the blowout flow passage and communicating with the first blowout flow passage, and

a decorative panel attached to a lower portion of the lateral airflow casement, and including the air inlet, a third suction flow passage, a third blowout flow passage, and the air outlet, the third suction flow passage forming part of the suction flow passage and communicating with the second suction flow passage and the air inlet, the third blowout flow passage forming part of the blowout flow passage and communicating with the second blowout flow passage and the air outlet,

the accommodating chamber is provided in the lateral airflow casement, and

the plurality of lateral airflow adjusting plates of the lateral airflow adjusting unit are arranged in the second blowout flow passage of the lateral airflow casement.

7. The indoor unit of an air-conditioning apparatus of claim 6, further comprising a vertical airflow adjusting plate provided in the third blowout flow passage in such a manner as to be swingable and configured to adjust in a vertical direction, an angle of the air that is blown from the air outlet.