JP7472749B2 - Ceiling-mounted air conditioner - Google Patents

Description

The present invention relates to a ceiling-embedded air conditioner having a decorative panel. The present invention relates to a ceiling-embedded air conditioner having a decorative panel.

Patent Document 1 discloses an air conditioner (air conditioner) equipped with a ceiling-embedded indoor unit that is housed in a ceiling. This indoor unit is equipped with a decorative panel on the bottom surface of a box-shaped air conditioner main body (main unit). An air inlet and an air outlet are formed at the bottom of the air conditioner main body, and an indoor fan and an indoor heat exchanger are provided inside the air conditioner main body. The decorative panel also includes an intake grille that covers the air inlet.
By operating the indoor fan, this air conditioner draws in air from inside the room through the suction grille and suction port, the sucked in air exchanges heat with the refrigerant flowing through the indoor heat exchanger, and the conditioned air after heat exchange is blown out into the room through the air outlet.

Publication No. WO2018/83791

It is desirable for the air conditioner body to be as compact as possible, taking into consideration handling on-site and costs. On the other hand, it is desirable for the air blown out from the indoor unit to be blown out over a wide area rather than a narrow area, as this makes it easier for the air to reach the entire room, so it is desirable for the air outlet formed at the bottom of the air conditioner body to be wide in the left-right direction in Figure 1 of Patent Document 1. However, if the left-right width of the ceiling-embedded air conditioner body disclosed in Patent Document 1 is reduced to make it compact, and the left-right width of the air outlet is also reduced accordingly, the air blown out from the indoor unit will be blown out over a narrow area, which could cause discomfort to people in the room.

In view of the above problems, the object of the present invention is to provide a ceiling-embedded air conditioner with a ceiling-embedded indoor unit that can increase the width of the air blown out from the air outlet in the left-right direction while keeping the size of the air conditioner body compact.

One aspect of the present invention is a ceiling fan that is provided with a main unit having a front panel, a back panel, a top panel, a bottom panel, and a pair of side panels, the main unit having an outlet opening on the front panel and an inlet opening on the bottom panel, a decorative panel that is disposed on the bottom surface of the main unit and has an outlet and an inlet, and an electrical box that is disposed on the main unit and contains electrical components, the interior of the main unit being partitioned by a partition into a heat exchanger chamber that is disposed on the front side and a blower chamber that is disposed on the rear side, an indoor heat exchanger is disposed in the heat exchanger chamber, and a blower is disposed in the blower chamber, and the main unit is installed above the ceiling of a building. This ceiling-embedded air conditioner has an outlet chamber that is attached to the front panel of the main unit, has chamber side panels on both sides of the main unit, a chamber intake port that communicates with the outlet opening on the back side, a chamber outlet port that communicates with the outlet port on the bottom side, and a guide section that is disposed between the chamber intake port and the chamber outlet port and guides the airflow that flows in from the chamber intake port to the chamber outlet port. This is a ceiling-embedded air conditioner in which the width of the chamber outlet port in the direction between the chamber side panels is set to be longer than the width of the outlet opening in the direction between the side panels.

The present invention provides a ceiling-embedded air conditioner equipped with a ceiling-embedded indoor unit that can expand the width of the air blown out from the air outlet while keeping the size of the air conditioner body compact.

1 is a perspective view of an indoor unit of a ceiling-embedded air conditioner according to an embodiment of the present invention, viewed from the lower rear side. 1 is a perspective view of an indoor unit of a ceiling-embedded air conditioner according to an embodiment of the present invention, viewed from above on the front side. FIG. 2 is a perspective view of an indoor unit of a ceiling-embedded air conditioner according to an embodiment of the present invention with the decorative panel removed and an outlet chamber attached to the main unit, as viewed from below and front. 1 is a perspective view of an indoor unit of a ceiling-embedded air conditioner according to an embodiment of the present invention with the decorative panel removed, showing the main unit and the outlet chamber separated, viewed from the lower front side. FIG. 1 is a perspective view of an electrical equipment box of a ceiling-embedded air conditioner according to an embodiment of the present invention, viewed from the lower rear side. 1 is a perspective view of an outlet chamber of a ceiling-embedded air conditioner according to an embodiment of the present invention, viewed from the lower rear side. FIG. 1 is a perspective view of an indoor unit of a ceiling-embedded air conditioner according to an embodiment of the present invention, viewed from below and front, with a decorative panel removed from the indoor unit attached to a ceiling. FIG. 11 is a perspective view of a ceiling-embedded air conditioner according to another embodiment of the present invention, viewed from the rear side below the outlet chamber. FIG. 11 is a perspective view of an indoor unit of a ceiling-embedded air conditioner according to another embodiment of the present invention, viewed from above on the front side.

Below, an embodiment of a ceiling-embedded air conditioner according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to this embodiment.

The indoor unit 1 and main unit 2 will be described with reference to Figures 1A, 1B, 2A, and 2B. Figure 1A is a perspective view from below of an embodiment in which the indoor unit 1 is a ceiling-embedded air conditioner that is installed on the ceiling of a room to air-condition the room, and the main unit 2 of the indoor unit 1 is installed above the ceiling of a building. The indoor unit 1 is installed by hanging it from the upper wall of the ceiling with bolts (not shown) that engage with the hanging brackets 22 at the four corners of the main unit 2.

First, the indoor unit 1 will be described. The indoor unit 1 has a main unit 2 installed in the ceiling of a building, an air outlet chamber 40 attached to the front of the main unit 2, an electrical equipment box 30 installed on the left side of the main unit 2 and housing electrical components (not shown), and a decorative panel 3 arranged on the indoor side of the ceiling and attached to the bottom of the main unit 2. The decorative panel 3 has an intake port 5 on the rear side that draws indoor air into the main unit 2, and an openable and closable air outlet 6 on the front side that blows out the air flow from the main unit 2. The main unit 2 has an indoor heat exchanger 19 (see FIG. 2B) and a sirocco fan 20 as a blower inside, and the refrigerant flowing through the indoor heat exchanger 19 exchanges heat with the air sucked in from the intake port 5 of the decorative panel 3, and the heat-exchanged air is blown out from the air outlet 6 of the decorative panel 3 through a chamber outlet 46 formed on the bottom side of the air outlet chamber 40 described later. The intake port 5 is covered with an intake grill 4 to which a filter 7 for removing dust and dirt is attached.

In the following description of the indoor unit 1 in FIG. 1A, the direction toward the decorative panel 3 is referred to as the bottom or bottom, the direction opposite the decorative panel 3 is referred to as the top or top, the air outlet 6 side is referred to as the front or front, the air inlet 5 side is referred to as the back or rear, the side on which the electrical box 30 is attached is referred to as the left side or left side, and the side opposite the side on which the electrical box 30 is attached is referred to as the right side or right side. This also applies to the following figures.

1B is a perspective view of the indoor unit 1 seen from the front side above. On the front side of the main unit 2, an air outlet chamber 40 is arranged to change the direction of the air flow so that the air flow blown forward from the front side of the main unit 2 is blown toward the bottom side. The electrical box 30 is arranged inside the corner formed by the back side and the left side of the main unit 2. The upper surface of the electrical box 30 is covered with a top plate 9. The decorative panel 3 is removably attached to the bottom surface of the main unit 2 so as to cover the bottom surface of the main unit 2, the bottom surface of the blow-out chamber 40, and the bottom surface of the electrical box 30. When the decorative panel 3 is attached to the bottom surface of the main unit 2, the suction grille 4 of the decorative panel 3 is positioned to cover the suction opening 14, and the air outlet 6 of the decorative panel 3 is positioned to communicate with the chamber air outlet 46 formed in the air outlet chamber 40 described later. When the decorative panel 3 is removed, the bottom surface of the main unit 2, the bottom surface of the blow-out chamber 40, and the bottom surface of the electrical equipment box 30 are exposed to the interior of the room.

A windshield plate 25 is attached to the top surface of the decorative panel 3 at a position opposite the bottom surface of the electrical box 30, and fills the gap between the decorative panel 3 and the electrical box 30 that is formed when the decorative panel 3 is attached to the main unit 2. This windshield plate 25 prevents air from above the ceiling from being sucked into the intake opening 14 of the fan room 18, which will be described later.

Next, the main unit 2 will be described. Figure 2A is a perspective view of the main unit 2 with the blow-out chamber 40 attached to it in a state in which the decorative panel 3 has been removed from the indoor unit 1, as viewed from the lower front side, and Figure 2B is a perspective view of the main unit 2 and the blow-out chamber 40 separated from each other, as viewed from the lower front side. The main unit 2 has a housing 8 equipped with a top plate 9 forming the upper surface, a pair of side plates 10 forming the left and right sides, a bottom plate 11 forming the bottom surface, a front plate 12 forming the front surface, a back plate 13 forming the back surface, and a partition plate 26 (see Figure 3) located in the middle of the front plate 12 and the back plate 13 in the front-to-rear direction, and the left side plate 10 is formed to be shorter in the front-to-rear direction than the right side plate 10. A heat exchanger chamber 17 is arranged on the front side of the housing 8, and a blower chamber 18 is arranged on the rear side, and the heat exchanger chamber 17 and the blower chamber 18 are separated by a partition plate 26. The electrical box 30 is installed on the inside of the corner formed by the back and left side of the housing 8, on the inner surface of the top plate 9. In addition, a decorative panel rear side mounting bracket 23 for mounting the decorative panel 3 to the housing 8 is attached to the right side plate 10 on the lower back side of the housing 8, and a similar decorative panel rear side mounting bracket 23 is attached to the electrical box bottom plate 31 of the electrical box 30 on the left side of the housing 8.

The heat exchanger chamber 17 is formed by the left side panel 10, the right side panel 10, the top panel 9, the bottom panel 11, the front panel 12, and the partition panel 26, and the blower chamber 18 is formed by the right side panel 10, the top panel 9, the partition panel 26, the back panel 13, and the electrical box 30 installed in the housing 8. The back panel 13 is removable so that the housing 8 can be used as the housing of the main unit 102 of a duct-type air conditioner, which is another embodiment described later, and by removing the back panel 13, an intake opening is formed on the back side of the housing 8. The heat exchanger chamber 17 houses an indoor heat exchanger 19 connected to an outdoor unit installed outdoors and a drain pan 21 located below the indoor heat exchanger 19, and the blower chamber 18 is equipped with two sirocco fans 20 as blowers that suck in indoor air through the intake port 5 of the decorative panel 3.

The bottom side of the blower chamber 18 located on the rear side of the main unit 2 is formed with an intake opening 14 that communicates with the intake port 5 of the decorative panel 3, and the sirocco fan 20 operates to draw air from the room into the main unit 2 through the intake port 5 and the intake opening 14. The front of the heat exchanger chamber 17 located on the front side of the main unit 2 is formed with an outlet opening 15, and the airflow that has exchanged heat with the refrigerant by the indoor heat exchanger 19 is blown out from the outlet opening 15. An opening (not shown) is formed in the partition plate 26 to connect the blower chamber 18 and the heat exchanger chamber 17, and the air sucked in from the intake opening 14 by the sirocco fan 20 is sent to the heat exchanger chamber 17, and the air that has exchanged heat with the indoor heat exchanger 19 is blown out from the outlet opening 15.

Next, the electrical box 30 will be described with reference to FIG. 3. The electrical box 30 is disposed in the housing 8 adjacent to the left side of the blower chamber 18. When the electrical box 30 is disposed in the housing 8, the electrical box 30 has one electrical box side plate 32 located on the rear side of the housing 8, the other electrical box side plate 32 located on the front side of the housing 8, an electrical box front plate 34 located on the left side of the housing 8, an electrical box rear plate 33 located on the blower chamber 18 side, and an electrical box bottom plate 31 located on the bottom side of the housing 8. The electrical box rear plate 33 functions as a partition plate that separates the left side of the blower chamber 18.

The bottom plate 31 of the electrical box is formed with a bottom opening 35 of the electrical box, which functions as a first inspection opening in the present invention. The front plate 34 of the electrical box is formed with a front opening 36 of the electrical box, which functions as a second inspection opening in the present invention. A reinforcing bar 39 is provided between the bottom opening 35 of the electrical box and the front opening 36 of the electrical box as a support member. By providing the reinforcing bar 39, the reinforcing bar 39 functions as a support member and can suppress deformation of the electrical box 30. In addition, the opening area of the bottom opening 35 of the electrical box is formed smaller than the opening area of the front opening 36 of the electrical box. Since the bottom opening 35 of the electrical box is mainly used for visual inspection of the inside of the electrical box 30, there is no need to make the opening area large. By making the opening area of the bottom opening 35 of the electrical box smaller than the opening area of the front opening 36 of the electrical box, the strength of the electrical box 30 can be maintained and deformation can be suppressed.

When the electrical box 30 is placed in the housing 8, the electrical box bottom plate 31 constituting the bottom surface of the electrical box 30 is exposed to the bottom side of the main unit 2, and the electrical box front plate 34 constituting the left side surface of the electrical box 30 is exposed to the side surface of the main unit 2. In this embodiment, the left side surface of the electrical box 30 and the side surface of the main unit 2 are arranged so that they are at the same surface height without any step. A first inspection lid 37 that covers the electrical box bottom opening 35 is attached to the electrical box bottom opening (first inspection opening) 35 formed in the electrical box bottom plate 31. In addition, a second inspection lid 38 that covers the electrical box front opening 36 (second inspection opening) formed in the electrical box front plate 34 is attached to cover the electrical box front opening 36, and the first inspection lid 37 and the second inspection lid 38 are separated from each other. In this embodiment, the second inspection lid 38 is formed to cover the entire electrical box front plate 34. The first inspection cover 37 is removably attached to the electrical box bottom plate 31, which has the electrical box bottom opening 35, by one screw at one end and by a locking part (not shown) at the other end. The second inspection cover 38 is removably attached to the electrical box front plate 34, which has the electrical box front opening 36, by three screws.

The blow-out chamber 40 is formed in a box shape with a pair of chamber side plates 42 at both ends of the lateral side and openings on the bottom and back sides, and is attached to the front of the main unit 2 so as to cover the blow-out opening 15 formed on the front of the main unit 2. As shown in FIG. 2A, the vertical height H2 of the blow-out chamber 40 is the same as the vertical height H1 of the main unit 2. FIG. 4 is a perspective view of the blow-out chamber 40 seen from the lower back side. As shown in FIG. 4, the blow-out chamber 40 is provided with a chamber top plate 41 forming the upper surface, a pair of chamber side plates 42 forming the left and right sides, a chamber front plate 43 forming the front, and a chamber back plate 44 forming the back. The chamber back plate 44 is formed with a chamber suction port 45 that communicates with the blow-out opening 15 formed on the front of the main unit 2 and has a width L1 in the left and right direction and a width L2 in the up and down direction (see FIG. 2B) that is approximately the same as the width L1 in the left and right direction of the blow-out opening 15. A chamber blow-out port 46 is formed over the entire bottom side of the blow-out chamber 40. Additionally, a decorative panel front R-side mounting bracket 48 for mounting the decorative panel 3 is attached to the chamber side plate 42 on the right side of the rear of the lower part of the blow-out chamber 40, and a decorative panel front L-side mounting bracket 49 is attached to the chamber rear plate 44 on the left side of the lower part of the blow-out chamber 40. The decorative panel front L-side mounting bracket 49 has an angle portion with an L-shaped cross section and is strong enough to support the decorative panel 3.

The left-right width of the blow-out chamber 40 is set to be longer than the left-right width of the housing 8 constituting the main unit 2, and when the blow-out chamber 40 is attached to the housing 8, the right chamber side plate 42 is flush with the right side plate 10 of the housing 8 without protruding from it, and the left chamber side plate 42 protrudes beyond the left side plate 10 on which the electrical box 30 of the housing 8 is installed, that is, protrudes beyond the left side surface of the electrical box 30. In addition, the left-right width L3 of the chamber blow-out port 46 is set to be longer than the left-right width L1 of the blow-out opening 15.

The airflow blown forward from the main unit 2 through the chamber intake port 45 enters the blow-out chamber 40, and is redirected toward the bottom of the main unit 2 by the chamber top plate 41, the left and right chamber side plates 42, and the chamber front plate 43 before being blown out from the chamber blow-out port 46. Therefore, the blow-out chamber 40 functions as a wind direction guide that changes the direction of the airflow. In this embodiment, the chamber top plate 41, the left and right chamber side plates 42, and the chamber front plate 43 function as guide parts 47 to guide the direction of the airflow. In addition, the airflow blown forward from the blow-out opening 15 of the main unit 2 is blown out from the chamber blow-out port 46, which has a width L3 that is longer than the width L1 of the blow-out opening 15 in the left-right direction, so the blow-out chamber 40 has a function of expanding the width of the airflow.

Figure 5 is a perspective view of the indoor unit 1 installed on the ceiling with the decorative panel 3 removed, viewed from the lower front side. The two-dot chain line in Figure 5 indicates the ceiling opening 60 provided in the ceiling for installing the indoor unit 1. The electrical box bottom plate 31, which is the bottom surface of the electrical box 30, is exposed on the bottom side of the main unit 2, and the second inspection cover 38, which constitutes the side of the electrical box 30, is exposed on the side of the main unit 2, and the electrical box 30 is disposed on the main unit 2. Therefore, when the decorative panel 3 is removed from the indoor unit 1, the electrical box bottom plate 31 of the electrical box 30 is exposed. In addition, since the indoor unit 1 of this embodiment is attached so that the blowing chamber 40 protrudes toward the electrical box 30 side relative to the main unit 2, the ceiling opening 60 provides a work space 50 as shown by the hatching in Figure 5. Therefore, it can be confirmed that the second inspection cover 38 is also exposed through the ceiling opening 60.

Next, a case where the indoor unit 1 of this embodiment is inspected will be described. When the decorative panel 3 is removed from the indoor unit 1 installed on the ceiling, the electrical box 30 is exposed through the ceiling opening 60, and the first inspection cover 37 and the second inspection cover 38 are removed to reveal the electrical box bottom opening 35 and the electrical box front opening 36. Tools can be inserted through the electrical box front opening 36, and the electrical box bottom opening 35 can be used as a viewing window for inspection work.

Conventionally, when an inspection hatch is provided only on the bottom or side of an electrical box, there is a problem that tools or hands must be inserted through the single inspection hatch, which can get in the way and make it difficult to see inside the electrical box. However, in the indoor unit 1 of this embodiment, two inspection hatches are provided, the bottom opening 35 of the electrical box and the front opening 36 of the electrical box. By using the front opening 36 of the electrical box for work and the bottom opening 35 of the electrical box for viewing, the inside of the electrical box can be seen without getting in the way of tools or hands, improving workability when inspecting electrical equipment.

In addition, since two inspection openings, the bottom opening 35 of the electrical box and the front opening 36 of the electrical box, are provided, light can enter through the two inspection openings, making it possible to illuminate the inside of the electrical box 30 more brightly than if there was only one inspection opening, thereby improving workability when inspecting electrical equipment.

In the indoor unit 1 of this embodiment, the first inspection cover 37 provided at the bottom opening 35 of the electrical box and the second inspection cover 38 provided at the front opening 36 of the electrical box are separate. For example, when the only task is to check the display status of an electronic display device provided inside the electrical box 30, this can be done by simply removing only the first inspection cover 37 from the bottom side without removing the second inspection cover 38, which improves the workability when inspecting electrical equipment.

In this embodiment, the electrical box 30 is disposed inside the corner formed by the rear face and left side face of the housing 8, i.e., inside the main unit 2. However, as long as the electrical box 30 is disposed in the housing 8 so that the bottom opening 35 of the electrical box is exposed on the bottom face side of the main unit 2 and the front opening 36 of the electrical box is exposed on the side face side of the main unit 2, the electrical box 30 may be attached to the outer face of the side panel 10 of the housing 8, for example.

In this embodiment, the end face of one of the chamber side plates 42 of the blow-out chamber 40 protrudes beyond the side surface on the side where the electrical equipment box 30 of the main unit 2 is located, but this does not necessarily have to be the case. However, in order to ensure working space during inspection, it is desirable that the end face of one of the chamber side plates 42 of the blow-out chamber 40 protrude beyond the side surface on the side where the electrical equipment box 30 of the main unit 2 is located, as in this embodiment.

In addition, in this embodiment, the end face of the other chamber side plate 42 of the blow-out chamber 40 is flush with the side surface opposite the side on which the electrical box 30 of the main unit 2 is located, with no step, but the end faces of the chamber side plates 42 on both sides may protrude beyond both side surfaces of the main unit 2. However, when packaging the blow-out chamber 40 attached to the main unit 2 in packaging material, it is preferable that only the end face of one chamber side plate 42 of the blow-out chamber 40 protrudes beyond the side surface on which the electrical box 30 of the main unit 2 is located, since the structure of the packaging material is simplified if there are fewer protruding parts when packaging the blow-out chamber 40 attached to the main unit 2.

In addition, in this embodiment, the blow-out chamber 40 is formed in a box shape with end plates on both sides and openings on the bottom and back sides, but as long as it has a chamber suction port 45 on the back side, a chamber outlet 46 on the bottom side, and a guide portion 47 arranged between the chamber suction port 45 and the chamber outlet 46, it does not have to be box-shaped. For example, it may be a quarter-cylinder shape made of sheet metal bent into an arc shape between the chamber suction port 45 and the chamber outlet 46, or a triangular prism shape with an inclined surface formed between the chamber suction port 45 and the chamber outlet 46.

Next, a blow-out chamber 100 according to another embodiment of the present invention will be described with reference to Figures 6 and 7. The blow-out chamber 100 has side panels on both lateral ends, has openings on the bottom and rear sides, and is formed in a stepped box shape on the other lateral side, and is attached to the front of the main unit 2 so as to cover the blow-out opening 15 formed on the front of the main unit 2. As with the first embodiment, the vertical height H2 of the blow-out chamber 40 is the same as the vertical height H1 of the main unit 2 (see Figure 7). Figure 6 is a perspective view of the blow-out chamber 100 as seen from the lower rear side. As shown in Fig. 6, the blow-out chamber 100 includes a chamber top plate 101a forming the upper surface, a right chamber side plate 102a forming the right side surface, a left chamber main side plate 102b forming the left side surface, a chamber front plate 103 forming the front surface, a chamber back plate 104 forming the back surface, a chamber sub-top plate 101b standing upright from the left chamber main side plate 102b in parallel with the chamber top plate 101a, and a left chamber sub-side plate 102c provided downward from the left end of the chamber sub-top plate 101b, and the left side is stepped. The chamber back plate 104 is formed with a chamber suction port 105 that communicates with the blow-out opening 15 formed on the front surface of the main unit 2 and has a width L1 in the left-right direction and a width L2 in the up-down direction (see Fig. 2B) that is approximately the same as the width L1 in the left-right direction of the blow-out opening 15. A chamber blow-out port 106 is formed over the entire bottom surface side of the blow-out chamber 100. Additionally, a decorative panel front L-side mounting bracket 109 for mounting the decorative panel 3 is attached to the chamber back plate 104 on the lower left side of the blow-out chamber 100, and although not shown, a decorative panel front R-side mounting bracket is attached to the right chamber side plate right 102a on the lower back side of the blow-out chamber 100. The decorative panel front L-side mounting bracket 109 has an angle portion with an L-shaped cross section and is strong enough to support the decorative panel 3.

Figure 7 shows the state in which the blow-out chamber 100 is attached to the front panel 12 of the main unit 2. The width between the right chamber side panel 102a and the left chamber auxiliary side panel 102c, which is the overall width in the left-right direction of the blow-out chamber 100, is set longer than the left-right width of the housing 8 constituting the main unit 2, and the width between the right chamber side panel 102a and the left chamber main side panel 102b in the left-right direction of the blow-out chamber 100 is set to be the same as the left-right width of the housing 8 constituting the main unit 2. When the blow-out chamber 100 is attached to the housing 8, the right chamber side panel 102a on the right side is flush with the right side panel 10 of the housing 8 without protruding from it, and the left chamber auxiliary side panel 102c on the left side protrudes from the left side panel 10 on which the electrical box 30 of the housing 8 is installed, that is, protrudes from the left side of the electrical box 30. In addition, the left-right width L3 of the chamber blow-out port 106 is set longer than the left-right width L1 of the blow-out opening 15.

The airflow blown forward from the main unit 2 through the chamber suction port 105 enters the blow-out chamber 100 and is redirected toward the bottom of the main unit 2 by the chamber top plate 41, the right chamber side plate 102a, the left chamber main side plate 102b, the chamber sub-top plate 101b, the left chamber main side plate 102b, and the chamber front plate 103, so that the blow-out chamber 100 functions as a wind direction guide that changes the direction of the airflow. In this embodiment, the chamber top plate 41, the right chamber side plate 102a, the left chamber main side plate 102b, the chamber sub-top plate 101b, the left chamber main side plate 102b, and the chamber front plate 103 function as guides 107 to change the direction of the airflow. In addition, the airflow blown forward from the outlet 15 of the main unit 2 is blown out from the chamber outlet 106, which has a width L3 that is longer than the width L1 of the outlet 15 in the left-right direction, so the outlet chamber 100 has the function of expanding the width of the airflow.

In this embodiment, the right chamber side plate 102a on the right side is flush with the right side plate 10 of the housing 8 and does not protrude from it, but if the width L3 of the chamber outlet 106 is longer than the width L1 in the left-right direction of the outlet opening 15, it may be stepped and protrude from the right side plate 10 of the housing 8, like the left chamber auxiliary side plate 102c on the left side.

In this embodiment, the right or left side plate is formed in a stepped shape and protrudes from the side plate 10 of the housing 8, but it is preferable that it is box-shaped rather than stepped, as in the blow-out chamber 40 shown in the first embodiment. By making it box-shaped rather than stepped, in the case of the blow-out chamber 40, the airflow moving forward from the blow-out opening 15 collides with the inner surface of the chamber front plate 43 and spreads to the left and right, and the airflow spreading to the left and right is guided by the inner surfaces of the chamber side plates 42 on both sides, and the airflow with a width L3 wider than the width L1 direction of the blow-out opening 15 flows downward. On the other hand, in the case of the blow-out chamber 100, which has a stepped shape, the upper side of the airflow moving forward from the blow-out opening 15 collides with the inner surface of the chamber front plate 43, flows downward without spreading to the left and right, and then spreads in the left and right directions. Therefore, compared to the blow-out chamber 40, the airflow flowing downward occurs before the flow spreading to the left and right, and the flow spreading to the left and right is less than in the case of the blow-out chamber 40. In addition, the box-shaped configuration of the blow-out chamber 40 has the advantage of being simple in structure and therefore reducing manufacturing costs.

The above description refers to a limited number of embodiments, but the scope of the rights is not limited to these, and modifications of the embodiments based on the above disclosure will be obvious to those skilled in the art.

1...indoor unit, 2...main unit, 3...decorative panel, 5...intake port, 6...blowout port, 8...housing, 14...intake opening, 15...blowout opening, 17...heat exchanger chamber, 18...blower chamber, 19...indoor heat exchanger, 20...sirocco fan, 23...mounting bracket on rear side of decorative panel, 25...wind shield, 26...partition plate, 30...electrical box, 31...electrical box bottom plate, 32...electrical box side plate, 33...electrical box rear plate, 34...electrical box front plate, 35...electrical box bottom opening (first inspection hatch), 36...electrical box front opening (second inspection hatch), 37...first inspection cover, 38...second inspection cover, 39...reinforcing bar, 40...blowout chamber, 41...chamber top plate, 42...chamber side plate, 43...chamber front plate, 44...chamber rear plate, 45...chamber suction port, 46...chamber blowing port, 47...guide section, 48...decorative panel front R side mounting bracket, 49...decorative panel front L side mounting bracket, 50...work space, 60...ceiling opening, 100...blowout chamber, 101a...chamber top plate, 101b...chamber sub top plate, 102a...chamber side plate right, 102b...chamber main side plate left, 102c...chamber sub side plate left, 103...chamber front plate, 104...chamber rear plate, 105...chamber suction port, 106...chamber blowing port, 107...guide section, 109...decorative panel front L side mounting bracket

Claims (3)

a main body unit including a front panel, a rear panel, a top panel, a bottom panel, and a pair of side panels, the main body unit having an outlet opening on the front panel and an inlet opening on the bottom panel;
a decorative panel disposed on a bottom surface of the main unit and having an air outlet and an air inlet;
an electrical box that is disposed in the main unit and that houses electrical components;
The inside of the main unit is divided by a partition into a heat exchanger chamber arranged on the front side and a fan chamber arranged on the rear side,
An indoor heat exchanger is disposed in the heat exchanger chamber, and a blower is disposed in the blower chamber,
In a ceiling-embedded type air conditioner in which the main unit is installed in the ceiling space of a building,
an air outlet chamber including a chamber side plate attached to the front plate of the main unit and provided at both lateral ends, a chamber suction port on the rear side communicating with the air outlet, a chamber air outlet provided on the bottom side communicating with the air outlet, and a guide portion disposed between the chamber suction port and the chamber air outlet for guiding the air flow flowing in from the chamber suction port to the chamber air outlet,
a width of the chamber air outlet in a direction between the chamber side plates is set to be longer than a width of the air outlet opening in the direction between the side plates ,
The electrical equipment box has an inspection hatch that opens on a side surface and an inspection cover that covers the inspection hatch, and is disposed so that the inspection hatch is exposed on the side surface of the main unit,
2. A ceiling-embedded air conditioner comprising : a chamber side plate of the blow-out chamber, the chamber side plate being protruding from the side plate of the main unit on which the electrical equipment box is disposed . The blowout chamber is a box-shaped chamber including a chamber top plate, a chamber front plate, a chamber rear plate, and the chamber side plate,
The chamber rear plate is formed with the chamber inlet port,
2. The ceiling recessed type air conditioner according to claim 1, wherein the chamber top plate, the chamber front plate, and the chamber side plate form the guide portion. The ceiling-embedded air conditioner according to claim 1 or 2, characterized in that the vertical height of the blow-out chamber is the same as the vertical height of the main unit.

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