Air conditioner
An air conditioner capable of satisfactorily preventing noise from entering an indoor space includes: an indoor unit that is fixed to a wall surface of an indoor space and houses an indoor heat exchanger; and an outdoor unit that houses an outdoor heat exchanger connected to a refrigerant circuit that includes the indoor heat exchanger. The outdoor unit includes an outside casing that is fitted into an opening formed in a building wall partitioning an outdoor space and the indoor space from each other and defines an internal space that is open to the outdoor space and isolated from the indoor space by being surrounded by a sound insulation wall, and an inside casing that is disposed in the internal space and houses the outdoor heat exchanger.
1 . An air conditioner, characterized by comprising:
an indoor unit that is fixed to a wall surface of an indoor space and houses an indoor heat exchanger; and
an outdoor unit that houses an outdoor heat exchanger and a blower fan, the outdoor heat exchanger connected to a refrigerant circuit that includes the indoor heat exchanger, the blower blowing air to the outdoor heat exchanger,
the outdoor unit includes
an outside casing that is fitted into an opening formed in a building wall and projects from the opening formed in the building wall into a building interior to define an internal space of the outside casing that is arranged in the building interior, wherein the outside casing partitions an outdoor-exposed space and the indoor space,
wherein the internal space is open to the outdoor space, the internal space is surrounded by a sound insulation wall, and the internal space is isolated from the indoor space, and
an inside casing that is disposed in the internal space and houses the outdoor heat exchanger,
the internal space is formed between the outside casing and the inside casing,
the outside casing includes: a wall body having a first side wall, a second side wall, a bottom plate, a first top wall, and a second top wall; and a front panel, wherein the first side wall, the second side wall, the bottom plate, the first top wall, the second top wall, and the front panel are each formed as the sound insulation wall,
the walls of the wall body extend along respective virtual planes orthogonal to a wall surface of the building wall and define a storage port opening toward the indoor space and an open port being open to the outdoor space through the opening,
the front panel is joined to the wall body and closes the storage port, and
the inside casing includes
a first side plate that faces the first side wall,
a second side plate that faces the front panel,
a third side plate that faces the second side wall,
a fourth side plate that faces the open port,
a suction port that is provided in the fourth side plate and is open to the outdoor space, and
a blower port that is provided in the first side plate and allows air to be blown out after heat exchange toward the first side wall.
2 . The air conditioner according to claim 1 , wherein
the outside casing includes the second side wall that houses the inside casing between the second side wall and the first side wall, the wall body including the second side wall, and
the refrigerant circuit includes a switching valve, the switching valve is connected to the outdoor heat exchanger, protrudes from a side plate facing the second side wall in the inside casing, and switches opening and closing of a connection port on a basis of rotation of a screw whose rotation axis is an axis line set perpendicular to a plate surface of the side plate.
3 . The air conditioner according to claim 1 , wherein
the outside casing includes the wall body and the front panel,
the wall body includes the first side wall and the second side wall extending along a virtual plane orthogonal to the wall surface of the building wall and defines the storage port opening toward the indoor space, and
the front panel is joined to the wall body and closes the storage port, and the refrigerant circuit includes a switching valve and an auxiliary refrigerant pipe,
the switching valve is connected to the outdoor heat exchanger, protrudes from a side plate facing the second side wall in the inside casing, and forms a connection port having an axis line set in parallel to a plate surface of the side plate, and
the auxiliary refrigerant pipe is connected to the connection port in accordance with tightening of a flare nut whose rotation axis is the axis line and is drawn from the outside casing to the indoor space on a side of the indoor space than an edge of the second side wall on the side of the indoor space.
4 . The air conditioner according to claim 1 , wherein
the first side wall and the second side wall extend along a virtual plane orthogonal to a wall surface of the building wall,
the first top wall extends from an end of the first side wall and the second side wall on sides of the outdoor space toward sides of the indoor space and closes the internal space sandwiched by the first side wall and the second side wall from above, and
the second top wall extends from the first top wall toward the sides of the indoor space to ends of the first side wall and the second side wall on the sides of the indoor space and closes the internal space from above so as to be openable and closable.
5 . The air conditioner according to claim 1 , wherein
a heater is disposed between the outside casing and the inside casing.
6 . The air conditioner according to claim 1 , wherein
the outside casing includes
a drain pan for storing defrost-water generated when frost adhered to the outdoor heat exchanger is melted, and
a pump for discharging the defrost-water to an outside of the outside casing.
7 . The air conditioner according to claim 1 , wherein
a space provided between the blower port and the first side wall is larger than a space provided between the third side plate and the second side wall.
8 . The air conditioner according to claim 3 , wherein
the outside casing includes the bottom plate that is supported so as to be slidable with respect to the wall body in parallel to the first side wall and the second side wall and supports the inside casing from below.
9 . The air conditioner according to claim 3 , wherein
the end of the second side wall on a side of the indoor space includes a joining edge and an escape edge,
the joining edge is partitioned in a direction perpendicular to a floor surface and is fitted into the front panel, and
the escape edge is recessed from the joining edge toward a side of the outdoor space and accepts entry of the auxiliary refrigerant pipe.
10 . The air conditioner according to claim 5 , wherein
a first controller that controls the heater is provided in the inside casing, and
the first controller energizes the heater when a second controller receives a signal indicating a heating operation including a defrosting operation from the second controller provided in the indoor unit.
11 . The air conditioner according to claim 5 , further comprising
the sound insulation material on at least an outside of the outside casing corresponding to a position where the heater is disposed.
12 . The air conditioner according to claim 6 , wherein
at least part of a heater is housed in the drain pan.
13 . The air conditioner according to claim 12 , wherein
a plurality of holes for dropping the defrost-water into the drain pan is provided in a bottom plate of the inside casing, and part of the heater is housed in the drain pan along a direction in which the plurality of holes is lined up.
14 . The air conditioner according to claim 10 , wherein
the heater is controlled by the first controller to start energization in accordance with outside temperature.
15 . The air conditioner according to claim 13 , wherein
a drain for draining the defrost-water to an outside of the outside casing is provided in the drain pan, and another part of the heater different from the part is housed in the drain pan so as to be adjacent to the drain.