JP7547908B2 - Air conditioners - Google Patents

Description

The present invention relates to an air conditioner in which the main unit of the indoor unit that conditions the air inside the room is installed in the ceiling.

Patent Document 1 discloses an air conditioner (air conditioner) whose main body is embedded in the attic space to provide indoor air conditioning, with an inspection hatch of approximately the same size as the main body provided in the ceiling panel below the main body, which can be opened to perform maintenance on the electrical components inside the main body from below. The underside of the main body of this air conditioner is provided with an opening for maintaining the electrical components inside the main body, and a removable electrical cover for closing the opening.

Patent Document 2 discloses an air conditioner in which the main unit is embedded in the ceiling space to provide indoor air conditioning, and in which maintenance of the electrical components inside the main unit is performed from the side. The side of the main unit of this air conditioner is provided with an inspection hatch for maintaining the electrical components inside the main unit, and a removable cover plate for closing the inspection hatch.

In the case of the air conditioner disclosed in Patent Document 2, a maintenance panel is generally provided on the ceiling plate near the main unit, and when performing maintenance on the electrical components inside the main unit, a worker removes this maintenance panel, enters the ceiling space, removes the cover plate, and then performs maintenance through an inspection hatch provided on the side of the main unit.

Japanese Patent Application Publication No. 3-191228 WO2013/129527 publication

In the case of the air conditioner disclosed in Patent Document 1, maintenance of the electrical components inside the main unit is performed through an opening on the underside of the main unit, but because tools or hands are inserted through the opening on the underside of the main unit, the tools and hands get in the way, making it difficult to see inside, resulting in poor workability.

On the other hand, in the case of the air conditioner disclosed in Patent Document 2, maintenance of the electrical components inside the main unit is carried out through an inspection hatch provided on the side of the main unit. However, because tools or hands must be inserted through the inspection hatch provided on the side of the main unit, the tools and hands get in the way, making it difficult to see inside, as was the case with the air conditioner disclosed in Patent Document 1, resulting in poor workability.

In addition, even if a maintenance panel is provided on the ceiling panel below the main unit, an inspection hatch for maintaining the electrical components inside the unit is provided on the side of the main unit, which means that workers must enter the ceiling space and perform maintenance through the inspection hatch on the side of the main unit, resulting in poor workability.

In view of the above problems, the object of the present invention is to provide an air conditioner in which the main unit of the indoor unit that conditions the room is installed in the ceiling, and which improves the workability when performing maintenance on the electrical components of the main unit.

One aspect of the present invention is an air conditioner that includes a main unit that is stored in the ceiling space of a house, a blower and an indoor heat exchanger that are attached inside the main unit, and an electrical box that is disposed on the outside of the main unit and stores electrical components, in which the electrical box is installed in the main unit so that its bottom and sides are exposed, the electrical box has a first inspection hatch that opens into the bottom and a second inspection hatch that opens into the side, the first inspection hatch has a first inspection cover, the second inspection hatch has a second inspection cover, and the first inspection cover and the second inspection cover are separate.

The present invention provides an air conditioner in which the indoor unit that conditions the room is installed in the ceiling, improving the ease of maintenance of the electrical components of the main unit.

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

Below, an embodiment of an 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 of a ceiling-embedded air conditioner in which the indoor unit 1 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. The indoor unit 1 is installed by hanging it from the upper wall of the ceiling of the house by bolts (not shown) that engage with the hanging fittings 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, an air outlet chamber 40 attached to the front of the main unit 2, an electrical equipment box 30 located on the left side of the main unit 2 and housing electrical components (not shown), and a decorative panel 3 located 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 airflow 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 from the rear of the front side of the main unit 2 toward the front side is blown toward the bottom side. The electrical box 30 is arranged inside the corner formed by the rear side and the left side of the main unit 2. In addition, two hanging brackets 22 used to hang the indoor unit 1 in the ceiling space of the house are attached to the upper right side and left side of the main unit 2. 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 blowing 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 equipment box 30 is located on the inside of the corner formed by the rear and left side of the housing 8, on the inner surface of the top plate 9.

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 (top plate 9) 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, and the upper surface is covered by the top plate 9. 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. In addition, a front opening 36 of the electrical box is formed under the front plate 34 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, and 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.

The electrical box 30 is disposed on the outer side of the blower 20 in the housing 8, and when the electrical box 30 is disposed in the housing 8, the electrical box bottom plate 31 constituting the bottom surface of the electrical box 30 is exposed to the bottom surface 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 side 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 disposed so as to be 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 the electrical box front opening 36, and the first inspection lid 37 and the second inspection lid 38 are separated from each other. 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 piece at the other end. The second inspection cover 38 is removably attached to the side plate 10 and the electrical box bottom plate 31 by three screws.

The blow-out chamber 40 is formed in a box shape with a pair of end plates at both sides 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. FIG. 4 is a perspective view of the blow-out chamber 40 seen from the bottom back side. As shown in FIG. 4, the blow-out chamber 40 is provided with a chamber top plate 41 forming the top surface, chamber side plates 42 forming the left and right side surfaces as end plates, a chamber front plate 43 forming the front surface, and a chamber back plate 44 forming the back surface. 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-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 46 is formed over the entire bottom side of the blow-out chamber 40.

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 located, 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, so that 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 that 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 surface of the electrical box 30, is exposed on the side surface 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 30 can be viewed without getting in the way of tools or hands, improving workability when inspecting electrical equipment.

In addition, because 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 and left side of the housing 8, i.e., inside the main unit. However, as long as the electrical box 30 is disposed on the outer side of the housing 8 relative to the blower 20 and the indoor heat exchanger 19, such that the electrical box bottom opening 35 is exposed on the bottom side of the main unit 2 and the electrical box front opening 36 is exposed on the side of the main unit 2, the electrical box 30 may be attached to the outer surface 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 formed by a plate bent into an arc shape between the chamber suction port 45 and the chamber outlet 46, or a triangular prism shape formed into an inclined surface between the chamber suction port 45 and the chamber outlet 46.

Next, an air conditioner according to another embodiment of the present invention will be described. The same reference numerals are used for the components common to the air conditioner according to the first embodiment, and detailed description of the components common to the air conditioner according to the first embodiment will be omitted. FIG. 6 is a perspective view of a duct-type air conditioner in which an indoor unit 101 is installed in the ceiling of a room to air-condition the room, and the indoor unit 101 is viewed from the lower front side. The difference between the indoor unit 101 according to the other embodiment and the indoor unit 1 according to the first embodiment is that the indoor unit 101 does not have a decorative panel 3, an outlet duct 104 is arranged in front of the main unit 102 of the indoor unit 101 instead of the outlet chamber 40, and an intake duct 103 is arranged on the back side of the main unit 102. In addition, with regard to the housing 8, the intake opening 14 formed on the rear bottom surface of the housing 8 of the indoor unit 1 is blocked by a blocking plate 106, and an intake opening 107 is formed on the back side of the housing 8, and the other components are the same.
In addition, the exhaust duct 104 attached to the front of the main unit 102 and the intake duct 103 attached to the back of the main unit 102 belong to the facilities of the building in which the duct-type air conditioner is installed, so in Figure 6 they are simply drawn as being short in the front-to-rear direction.

The indoor unit 101 has a main unit 102 installed in the ceiling and an electrical box 30 that is arranged on the left side of the main unit 102 and stores electrical components (not shown). The main unit 102 has a housing 8 that is the same as the housing of the air conditioner according to the first embodiment. However, the suction opening 14 formed in the housing 8 is blocked by a blocking plate 106 attached thereto, and the back plate 13 of the housing 8 is removed. Therefore, the suction opening 107 is formed on the back side of the housing 8. The electrical box 30 is arranged inside the corner formed by the back and left side of the housing 8, and when the electrical box 30 is arranged in the housing 8, the electrical box bottom plate 31 that constitutes the bottom of the electrical box 30 is exposed on the bottom side of the main unit 102, and the electrical box front plate 34 that constitutes the left side of the electrical box 30 is exposed on the side of the main unit 102.

Air is sucked in from the intake opening 107 via the intake duct 103 by the sirocco fan 20 (not shown in FIG. 6) and sent to the heat exchanger chamber 17, and the air that has exchanged heat with the refrigerant in the indoor heat exchanger 19 (not shown in FIG. 6) is blown out from the exhaust opening 15 and sent into the room via the exhaust duct 104.

The main unit 102 uses the housing 8 of the air conditioner according to the first embodiment, and the intake opening 14 of the housing 8 is blocked by attaching a blocking plate 106, and an intake opening 107 can be formed on the rear side by removing the rear plate 13 of the housing 8. Therefore, a common housing can be used for the ceiling-embedded air conditioner according to the first embodiment and the duct-type air conditioner according to this embodiment, and parts can be standardized.

Next, the case of inspecting the indoor unit 101 of this embodiment will be described with reference to FIG. 7. The two-dot chain line in FIG. 7 indicates a ceiling opening 60 provided in the ceiling for inspecting the indoor unit 101. The ceiling opening 60 is provided with an openable inspection cover (not shown). 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 102, and the second inspection cover 38, which constitutes the side surface of the electrical box 30, is exposed on the side surface of the main unit 102. Since the electrical box 30 is disposed on the main unit 102, when the inspection cover provided on the ceiling opening 60 is opened, the electrical box bottom plate 31 of the electrical box 30 is exposed. It can also be confirmed that the second inspection cover 38 is also exposed through the ceiling opening 60.

When the inspection lid provided on the ceiling opening 60 is opened, the electrical box 30 is exposed through the ceiling opening 60, so the first inspection lid 37 and the second inspection lid 38 can be removed to reveal the bottom opening 35 and the front opening 36 of the electrical box. Tools can be inserted through the front opening 36 of the electrical box, and the bottom opening 35 of the electrical box 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, because 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 101 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 addition, if the ceiling opening 60 is only open directly below the indoor unit 101, it is possible to remove only the first inspection cover 37 and inspect through the bottom opening 35 of the electrical box. If the ceiling opening 60 is open in a location away from the indoor unit 101, the worker can enter the ceiling space through the ceiling opening 60, remove only the second inspection cover 38, and inspect through the front opening 36 of the electrical box.

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... exhaust port, 8... housing, 14... intake opening, 15... exhaust opening, 17... heat exchanger chamber, 18... blower chamber, 19... indoor heat exchanger, 20... sirocco fan, 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 port), 36... electrical box front opening (second inspection port) Inspection port), 37...first inspection cover, 38...second inspection cover, 39...reinforcement bar, 40...air outlet chamber, 41...chamber top plate, 42...chamber side plate, 43...chamber front plate, 44...chamber back plate, 45...chamber intake port, 46...chamber exhaust port, 47...guide section, 50...work space, 60...ceiling opening, 101...indoor unit, 102...main unit, 103...intake duct, 104...exhaust duct, 106...cover plate, 107...intake opening

Claims (5)

A main unit that is stored in the ceiling space of a house;
A blower and an indoor heat exchanger attached inside the main unit;
an electrical box disposed on the exterior side of the main unit and housing electrical components;
The electrical box is installed on the main unit so that a bottom surface and a side surface are exposed,
The electrical equipment box has a first inspection opening that opens to the bottom surface and a second inspection opening that opens to the side surface,
The first access hatch includes a first access lid, and the second access hatch includes a second access lid;
The first inspection cover and the second inspection cover are separate ,
An air conditioner characterized in that a reinforcing bar serving as a support member is provided between the first inspection hatch and the second inspection hatch . The air conditioner according to claim 1, characterized in that the electrical box is attached to the side of the main unit. 3. The air conditioner according to claim 1, wherein an opening area of the first inspection hatch is smaller than an opening area of the second inspection hatch. The main unit includes an air outlet chamber attached to a front surface thereof and configured to guide the direction of the airflow blown out from the main unit downward;
The air conditioner according to any one of claims 1 to 3, further comprising a decorative panel that is attached to the bottom surface so as to be freely opened and closed, and covers the bottom surface of the main unit, the bottom surface of the electrical box, and the bottom surface of the blow-out chamber. 5. The air conditioner according to claim 4 , wherein one side surface of the blowout chamber protrudes beyond a side surface of the electrical equipment box exposed on a side surface of the main unit.

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