JP5549817B2 - Duct type air conditioner indoor unit - Google Patents

Description

  The present invention relates to an indoor unit of a duct-type air conditioner that is improved with respect to a cooling structure of an electrical component room.

  As an indoor unit of a conventional duct type air conditioner, it is installed behind the ceiling, is equipped with a blower fan inside the indoor unit body, is equipped with an electrical component room inside or outside the indoor unit body, and is generated by heat-generating parts inside the electrical component room In order to cool the heat, there is a type in which air behind the ceiling is sucked and cooled by a blower fan from a suction port provided in the electrical component room. However, simply by providing a suction port in the electrical component room, the maximum temperature of the atmosphere behind the ceiling is about 60 ° C., and thus the electrical component chamber cannot be sufficiently cooled. To solve this problem, as shown in FIG. 12, the blower fan 220 and the heat exchanger 230 are arranged inside the casing 210 of the indoor unit body 200, and the side plate 211 is located near the suction port of the blower fan 220. An indoor unit that has an opening 211a and passes through the protruding portion 241 from the ventilation hole 211a by aligning the protruding portion 241 provided with a ventilation hole (not shown) on the back of the substrate of the electrical component chamber 240 with the opening 211a. There is one in which the electrical components in the electrical component chamber 240 are cooled by air subjected to heat exchange in the body (Patent Document 1).

JP 2009-030829 A

  However, in Patent Document 1, air passes only through the back of a part of the substrate of the electrical component chamber 240, and heat generated in a reactor, a capacitor, or the like, which is a heat generating component arranged in the electrical component chamber 240. Not enough for cooling. In addition, since a part of the substrate of the electrical component chamber 240 is opened to the air passage, moisture generated in the heat exchanger may enter the electrical component chamber 240, causing a short circuit or damage to parts. May lead to

  An object of the present invention is to provide an indoor unit of a duct type air conditioner that can cool an electrical component room with a simple configuration and prevents moisture from being generated in the electrical component room.

To achieve the above object, the invention according to claim 1 includes at least a front plate having an air outlet, a back plate having a suction port, a safety drain pan having a frame around it and serving also as a bottom plate, A top plate covering the upper surface and a side plate connecting one end of the front plate and one end of the back plate constitute a housing, a blower is fixed to the back surface of the front plate, and heat is applied to the back surface of the back plate. In a duct-type air conditioner indoor unit that includes an exchanger and constitutes the indoor unit main body, a partition plate that divides the inside of the housing into left and right sides is provided, and one end of the partition plate is fixed to the back surface of the front plate. A heat exchange side plate for holding the heat exchanger in a vertical position on the pipe outlet side of the heat exchanger, one end of the heat exchange side plate is fixed to the back plate, and the other end of the heat exchange side plate And the other end of the partition plate fixed to each other, the heat exchange side plate and the partition Are arranged in a row to form a partition wall, a blower chamber in which the blower and the heat exchanger are arranged on one side partitioned by the partition wall, and an electrical component on the other side partitioned by the partition wall The electrical component chamber includes an electrical component chamber bottom plate disposed in a raised shape with respect to the safety drain pan, and the electrical component chamber bottom plate is interposed between the safety drain pan and the electrical component chamber bottom plate. An air intake for guiding air is formed, and air in the ceiling is guided from the inside of the frame of the safety drain pan to the air intake, and from the air intake, the electrical component chamber, and further from the electrical component chamber, the An air passage leading to the blower chamber is formed.
According to a second aspect of the present invention, in the indoor unit for a duct-type air conditioner according to the first aspect, the electrical component room is connected to the electrical component chamber side plate arranged in parallel to the partition plate, and the electrical component chamber side plate. On the other hand, a back plate of the electrical component room that is bent in an L shape and continuous, the bottom plate of the electrical component chamber disposed in a raised bottom shape with respect to the safety drain pan, and the electrical component that closes the electrical component chamber to the outside A space that is closed by a chamber lid, a part of the top plate, and a part of the front plate, and a first gap between the bottom plate of the electrical component chamber and a part of the front plate A second gap is formed between the frame of the safety drain pan and the electrical component chamber lid, and an air intake is provided on the bottom side surface of the electrical component chamber bottom plate facing the frame of the safety drain pan. Forming and communicating with the partition plate and the electrical component chamber side plate A through hole is formed, and the air passage sequentially passes through the second gap, the air intake, the lower surface of the bottom plate of the electrical component chamber, the first gap, the interior of the electrical component chamber, and the through hole. It is characterized by being a passage.
According to a third aspect of the present invention, in the indoor unit of the duct type air conditioner according to the first or second aspect, at least a reactor and a capacitor are included in the air passage that passes through the interior of the electrical component room. It is characterized by that.
According to a fourth aspect of the present invention, in the indoor unit of the duct type air conditioner according to the second or third aspect, the position of the air intake formed in the raised bottom side surface of the bottom plate of the electric component room is the electric component chamber. The position of the bottom plate is biased toward the electrical component room back plate side.

  According to the present invention, since the air in the ceiling is led from the inside of the frame of the safety drain pan to the electrical component chamber and further from the electrical component chamber to the blower chamber, the air in the air channel is sucked by the blower. Therefore, air is not trapped in the electrical component room, and even when air having a maximum temperature of about 60 ° C. in the back of the ceiling is taken in, the heat generating components existing in the electrical component room are effectively cooled. In addition, since the air passage that passes through the electrical component chamber is separated from the air passage that passes through the heat exchanger, moisture is not generated in the electrical component chamber.

It is a side view of arrangement | positioning of the indoor unit of the duct type air conditioner of a present Example. It is a perspective view of the indoor unit main body of the indoor unit of the duct type air conditioner of a present Example. It is a top view of the state which removed the top plate of the indoor unit main body of the indoor unit of the duct type air conditioner of a present Example. It is sectional drawing of the AA line of FIG. It is a fragmentary perspective view of the partition plate vicinity of the state which removed the top plate of the indoor unit main body of the indoor unit of the duct type air conditioner of a present Example. It is explanatory drawing of the assembly of the air blower of the indoor unit main body of the indoor unit of the duct type air conditioner of a present Example. It is a fragmentary perspective view of the electrical component room and piping room of the state which removed the top plate of the indoor unit main body of the indoor unit of the duct type air conditioner of a present Example. It is a partial top view of the electrical component room and piping room of the state which removed the top plate of the indoor unit main body of the indoor unit of the duct type air conditioner of a present Example. It is explanatory drawing of the flame | frame structure of the electrical equipment room vicinity of the indoor unit main body of the indoor unit of the duct type air conditioner of a present Example. It is a fragmentary perspective view of the electrical component room of the state which removed the top plate of the indoor unit main body of the indoor unit of the duct type air conditioner of a present Example. It is a fragmentary perspective view of the piping chamber of the state which removed the piping cover of the indoor unit main body of the indoor unit of the duct type air conditioner of a present Example. It is a partial exploded perspective view of the indoor unit main body of the indoor unit of the conventional duct type air conditioner.

  FIG. 1 shows an installed state of a duct type air conditioner according to one embodiment of the present invention as viewed from the side of an indoor unit. Reference numeral 1 denotes an indoor unit main body. One end of a suction duct 2A is attached to the suction port 1a, and the other end of the suction duct 2A communicates with the indoor space 4 by a suction grill 3A. In addition, one end of the blowout duct 2B is attached to the blowout port 1b of the indoor unit body 1, and the other end of the blowout duct 2B is communicated with the indoor space 4 by the blowout grill 3B. The indoor unit body 1 is placed on the ceiling plate 6 of the building in the ceiling space 5. The indoor unit body 1 may be hung from the building ceiling.

  As shown in FIGS. 2 and 3, the indoor unit main body 1 includes a safety drain pan 101 that also serves as a bottom plate, a front plate 102 that includes an air outlet 1b, a back plate 103 that includes a suction port 1a, and a front plate 102. The left side plate 104 that connects the rear plate 103 and the top plate 105 constitute a housing. The front plate 102, the back plate 103, the side plate 104, and the partition plate 106 attached to the front plate 102 are erected from the safety drain pan 101 to form a housing frame α. The safety drain pan 101 is slightly larger than the housing frame α, and includes a frame 101a around the body so as not to leak water in the main body to the outside. The safety drain pan 101 is attached to the housing frame α by fixing the frame 101 a to the front plate 102 and the back plate 103. The front plate 102 is provided with a blowing duct mounting frame 108 for mounting the blowing duct 2B, and the back plate 103 is provided with a suction duct mounting frame 107 for mounting the suction duct 2A.

  As shown in FIG. 3, the interior of the indoor unit main body 1 includes a partition wall 106 and a heat exchange side plate 141 (described later) arranged in a row to form a partition wall β, and one side partitioned by the partition wall β is The blower chamber 120 is provided, and the other side is the electrical component chamber 130 and the piping chamber 160. As shown in FIGS. 5 to 8 and 10, the partition plate 106 is formed in a T-shape on the back surface of the front plate 102 so as to be orthogonal to the front plate 102 in a direction parallel to the side plate 104. One end is fixed to the shape, and the inside of the housing is divided into left and right. The electrical component chamber 130 and the piping chamber 160 are partitioned by an electrical component chamber back plate 131 of the electrical component chamber 130. In the blower chamber 120, the blower 150 is directly attached to the back of the blower outlet 1 b of the front plate 102, and the heat exchanger 140 is disposed in a vertical posture in the vicinity of the backplate 103. With this configuration, the air sucked from the suction port 1a by the blower 150 passes through the suction grill 3A and the suction duct 2A from the indoor space 4 and is heat-exchanged by the heat exchanger 140, and then from the blower outlet 1b to the blowout duct 2B. It passes through the blowing duct 3B and is blown into the indoor space 4.

  The heat exchanger 140 includes a heat exchange side plate 141 for fixing to the housing frame α. By attaching one of the heat exchange side plates 141 to the partition plate 106 and the other to the back plate 103, the frame of the housing is obtained. It is fixed to α. The blower 150 is configured by connecting two blower fans 152 to a rotary shaft 151, and includes a motor 154 supported by a motor support 153 at one end of the rotary shaft 151, and a shaft fixing base 155 at the other end. A supported bearing 156 is provided. The blower fan 152 includes a fan casing 157 that surrounds the blower fan 152 and can be divided into upper and lower parts and opens into the air outlet 1b of the front plate 102. The motor support 153 includes an attachment base 158 for attaching to the front plate 102. The blower 150 is fixed to the front plate 102 by attaching the shaft fixing base 155, the fan casing 157, and the mounting base 158 to the front plate 102.

  When assembling the blower 150, first, with respect to the front plate 102, the blowing duct mounting frame 108 is provided on the front surface (outside the main body), and the partition plate 106, the shaft fixing base 155, and the motor support on the back surface (inside the main body). The mounting base 158 to which the 153 is fixed is fixed. Next, with the surface of the front plate 102 as the bottom, the motor 154, the fan casing 157, the bearing tool 156, the rotating shaft 151, and the like are fixed to predetermined positions. At this time, the motor 154 is attached to a position biased toward the partition plate 106 with respect to the front plate 102. Then, as shown in FIG. 6, the front plate 102 is raised on the top plate 105 that is upside down. The top plate 105 includes a top plate frame 105a for reinforcing the top plate 105 and fixing the housing frame α. The front plate 102 is fixed to the top plate frame 105a.

  At this time, since the side plate 104 is not yet attached, the front plate 102 is only fixed to the top plate frame 105a of the top plate 105, and the heavy air blower 150 attached to the back surface of the front plate 102 is used. Although one end of the partition plate 106 is fixed to the front plate 102 so as to be T-shaped when viewed from the top, the partition plate 106 is a top plate 105. The front plate 102 is supported and can maintain a stable state. Furthermore, since the partition plate 106 is attached to a position biased toward the motor 154 having the largest weight in the blower 150, the load on the front plate 102 is applied to the partition plate 106 in a well-balanced manner and takes a stable vertical posture. Can be maintained. Similarly, the suction duct attachment frame 107 is attached to the front surface (outside the main body) and the heat exchanger 140 is attached to the rear surface (inside the main body). The heat exchanger 140 is attached by fixing one side of the heat exchange side plate 141 provided in the heat exchanger 140 to the back plate 103. The back plate 103 is disposed in the top plate 105 to which the front plate 102 is attached, and the back plate 103 is fixed to the top plate frame 105a. Next, the other side of the heat exchange side plate 141 is fixed to the side of the partition plate 106 that is not fixed to the front plate 102. Further, the side plate 104 is attached so as to connect the front plate 102 and the back plate 103, then a member constituting the electrical component chamber 130 described later is attached, and finally the safety drain pan 101 is attached, and the assembly is completed. To do.

  In this way, as shown in FIG. 6, the air blower 150 is supported by the partition plate 106 during the assembly, so that other components can be attached smoothly and the assemblability is improved. In addition, since the blower chamber 120 is separated from the electrical component chamber 130 and the piping chamber 160 by connecting the heat exchange side plate 141 and the partition plate 106 in a row, the blower is affected by the electrical component chamber 130, the piping, and the like. The air blowing efficiency is improved, and the electrical component chamber 130 is not cooled by the sucked air and does not condense.

  As shown in FIGS. 7 to 10, the electrical component chamber 130 is composed of an L-shaped electrical component chamber rear plate 131 and the other electrical component chamber side plate as viewed from the upper surface standing so as to surround two sides. The periphery is closed by 132, the electrical component chamber lid 133 that closes the opened one surface (facing the electrical component chamber side plate 132) to the outside, and a part of the front plate 102 that covers the other surface (front surface). The top surface is closed by a part of the top plate 105, and the bottom surface is closed by the electrical component room bottom plate 134 having a raised bottom (see FIG. 9). The electrical component chamber bottom plate 134 has a raised bottom side surface 134a. The lower end of the raised bottom side surface 134a abuts on the safety drain pan 101, and the electrical component chamber bottom plate 134 is separated from the safety drain pan 101 by the height of the raised bottom side surface 134a. Is supported in the bottom state. In the present embodiment, the electrical component chamber bottom plate 134 is formed by extending and bending the electrical component chamber side plate 132, but may be formed of a separate member.

  The electrical component room side plate 132 and the electrical component room back plate 131 side are attached by an electrical component room fixture 135 mounted between the electrical component chamber side plate 132 and the partition plate 106, and the front plate of the electrical component room side plate 132 is attached. On the 102 side, an attachment portion 132b (see FIG. 8) formed by extending the front plate 102 side of the electrical component room side plate 132 toward the partition plate 106 side is attached to the partition plate 106, thereby the electrical component chamber. The side plate 132 and the partition plate 106 are arranged in parallel, and an interval X is formed between them (see FIG. 7). In the present embodiment, the front plate 102 side of the electrical component chamber side plate 132 is attached to the partition plate 106 by an attachment portion formed by extending the front plate 102 side of the electrical component chamber side plate 132 toward the partition plate 106 side. Although attached, you may attach to the partition plate 106 with the electrical component room fixture 135 similarly to the electrical component room backplate 131 side.

  A reactor 136, a capacitor 137, and other electrical components are attached inside the electrical component chamber 130 (see FIG. 8). The reactor 136 and the capacitor 137 are arranged at the upper corner opposite to the front plate 102.

  With this configuration, heat-exchanged air flows in the vicinity of the electrical component chamber 130 on the side of the blower chamber 120 of the partition plate 106, and the electrical component chamber 130 includes heat generating components such as the reactor 136 and the capacitor 137. There is a temperature difference between 120 and the electrical component chamber 130, and dew may be generated in the partition plate 106. In this case, dew is attached to the electrical component chamber 130 side of the partition plate 106, and the partition plate 106 is attached. The dew flows into the safety drain pan 101. On the other hand, since the electrical component chamber 130 is separated from the partition plate 106 by the interval X, the electrical component chamber 130 is not affected by the temperature of the blower chamber 120 and the partition plate 106, and dew does not occur outside the electrical component chamber 130. In addition, since the electrical component chamber 130 is raised, even if dew accumulates in the safety drain pan 101, the electrical component is not affected.

  As shown in FIG. 10, the electrical component chamber side plate 132 of the electrical component chamber 130 has an electrical component chamber through hole 132a in the vicinity of the reactor 136 and the capacitor 137, and corresponds to the electrical component chamber through hole 132a. As shown in FIG. 5, a partition plate through hole 106 a is also formed at the position of the partition plate 106. Further, an air intake port 134b is formed in the raised bottom electrical component chamber bottom plate 134 on the raised bottom side surface 134a facing the frame 101a of the safety drain pan 101 by a notch that is not blocked by the electrical component chamber lid 133. Yes. In this embodiment, the air inlet 134b is formed at a position spaced from the front plate 102 side of the raised bottom side surface 134a, but may be formed continuously from the front plate 102 side of the raised bottom side surface 134a. Since the electrical component room bottom plate 134 is disposed at a predetermined distance from the back surface of the front plate 102, the electrical component chamber 130 is disposed between the back surface of the front plate 102 and the electrical component chamber bottom plate 134. A gap G1 is formed at the lower corner of the. Further, since the safety drain pan 101 is larger than the housing frame α, a gap G2 is formed between the frame 101a of the safety drain pan 101 and the electrical component chamber lid 133.

  With this configuration, the air in the ceiling behind the air sucked in by the blower 150 enters the air intake port 134b of the electrical component chamber bottom plate 134 from the gap G2 between the frame 101a of the safety drain pan 101 and the electrical component chamber lid 133. It passes between the lower surface of the electrical component room bottom plate 134 and the safety drain pan 101, enters the electrical component chamber 130 through the gap G1 with the front plate 102, and passes through the electrical component chamber through-hole 132a of the electrical component chamber side plate 132 and the partition plate 106. It passes through the same partition plate through hole 106a and is sucked by the blower fan 152 of the blower 150 of the blower chamber 120. As a result, an air passage from the lower corner on the front plate 102 side to the upper corner on the opposite side of the front plate 102 is formed in the electric component chamber 130 as indicated by an arrow in FIG. The whole inside is cooled effectively. Further, since the reactor 136 and the capacitor 137 that are heat generating components are disposed in the vicinity of the electrical component chamber through-hole 132a that is the outlet of the air passage, the heat generated in the reactor 136 and the capacitor 137 is generated in the electrical component chamber 130. Will not flow through the electrical component chamber through-hole 132a, and other components will not be affected.

  In addition, when the attachment on the front plate 102 side of the electrical component chamber side plate 132 is attached to the partition plate 106 by an attachment portion formed by extending the front plate 102 side of the electrical component chamber side plate 132 toward the partition plate 106 side, When air is sucked into the electrical component chamber 130, the mounting portion serves as a shield on the back side of the electrical component chamber 130, and is sucked into the gap G1 without leakage.

  The air inlet 134b may be formed continuously from the front plate 102 side of the raised bottom side surface 134a in order to simplify the structure as long as the air sucked from the air inlet 134b flows into the gap G1. However, if the air intake port 134b is small, the distance passing between the lower surface of the electrical component room bottom plate 134 and the safety drain pan 101 is shortened, and the air sucked from the air intake port 134b becomes closer to the air intake port 134b side of the gap G1. Since the electrical component chamber cannot be sufficiently cooled by being sucked into the electrical component chamber 130 from a position biased toward the air, the air sucked from the air intake port 134b is interposed between the lower surface of the electrical component chamber bottom plate 134 and the safety drain pan 101. It is necessary to increase the width of the air intake port 134b so that the air intake port 134b passes through the gap G1.

  On the other hand, when the air intake port 134b is formed at a position separated from the front plate 102 side, the raised bottom side surface 134a is formed as a support portion that supports the electrical component chamber bottom plate 134 from the safety drain pan in a raised bottom state with the air intake port 134b interposed therebetween. As a result, the strength increases and it can be supported stably. Also, since the air intake port 134b is separated from the gap G1, the electric component chamber bottom plate 134 can be formed without increasing the air intake port 134b. Since the distance that the air passes between the lower surface and the safety drain pan 101 becomes longer, the distance is sufficiently expanded in the width direction in the safety drain pan before passing through the gap G1. In other words, the air sucked from the air intake port 134b passes through the gap G1 in the width direction facing the front plate 102 without being biased toward the air intake port 134b of the gap G1, so that the inside of the electrical component chamber 130 is effective. It is more effective because it can be cooled.

  From the above, the distance between the air inlet 134b and the gap G1 is effective when the distance that the air passes between the lower surface of the electrical component chamber bottom plate 134 and the safety drain pan 101 is longer. The position is more effective when it is biased toward the electrical component room back plate 131 side.

  According to this embodiment, since the air passage leading from the inside of the frame of the safety drain pan to the electrical component chamber and leading from the electrical component chamber to the blower chamber is formed, the air in the air passage is sucked by the blower. Therefore, air is not trapped in the electrical component room, and even when air having a maximum temperature of about 60 ° C. in the back of the ceiling is taken in, the heat generating component existing in the electrical component room is effectively cooled. In addition, since the air passage that passes through the electrical component chamber is separated from the air passage that passes through the heat exchanger, moisture is not generated in the electrical component chamber.

  The heat exchanger 140 is arranged in a vertical posture on the safety drain pan 101. The heat exchange side plate 141 that supports the pipe outlet side of the heat exchanger 140 has one side fixed to the back plate 103 and the other side fixed to the partition plate 106. The heat exchanger 140 includes a drain pan 142 that receives dew from the heat exchanger 140 between the bottom surface of the heat exchanger 140 and the safety drain pan 101, and the drain pan 142 passes under the heat exchange side plate 141 and is piped. It arrange | positions to the inside of the chamber 160, and doubles as the dew receiving of the piping of the piping chamber 160.

  Furthermore, the piping chamber 160 includes a heat exchange side plate 141, a part of the partition plate 106 connected in a row with the heat exchange side plate 141, and the electrical component chamber 130 so as to include the piping portion of the heat exchanger 140. The electrical component room back plate 131 and a part of the back plate 103 are surrounded by the periphery. As shown in FIGS. 10 and 11, a detachable piping chamber lid 161 is attached to the open surface (side surface) of the piping chamber 160. The piping chamber lid 161 is provided with an opening 161a for maintenance, and is closed by a detachable piping cover 162. Further, in the piping chamber 160, a refrigerant pipe 163 extending from the heat exchanger 140, a thermistor (not shown), an electronic expansion valve (not shown), and the like are arranged. The thermistor has a rod shape and is inserted into a cylindrical thermistor mounting cover 164 formed by bending a copper plate. The thermistor is attached to the refrigerant pipe 163 so that the refrigerant temperature of the refrigerant pipe 163 can be accurately detected. A cover 164 is attached. And the external connection piping 165 of the heat exchanger 140 that leads / introduces the refrigerant to / from the outdoor unit is drawn out through the piping chamber lid 161 and the notches 161b and 162a of the piping cover 162.

  As a result, the thermistor in the thermistor mounting cover 164 in the piping chamber 160 separated from the blower chamber 120 and the electrical component chamber 130 includes the heat exchange side plate 141 and the partition plate 106 connected to the heat exchange side plate 141 in a row. Since it is shielded from the air blowing chamber 120, it is not affected by the air passing through the heat exchanger 140, and the electrical component room back plate 131 that separates the electrical component chamber 130 and the piping chamber 160 is the heat exchange side plate 141 and its heat. The temperature of the refrigerant flowing through the refrigerant pipe 163 is not affected by the temperature of the electrical component chamber 130 because it is arranged on the side of the divider plate 106 instead of the joint of the divider plate 106 connected to the intersection plate 141 in a row. Is detected accurately. In addition, the air that is taken in from the suction port 1a of the back plate 103 and reaches the blower chamber 120 passes through the heat exchanger 140 without being affected by the refrigerant piping 163 in the piping chamber 160 being affected by ventilation resistance. Since only air is used, efficient air blowing is possible. Further, since the piping chamber lid 161 is fixed with screws or the like from the side surface of the top plate 105 or the electrical component chamber lid 133 (FIG. 11), the piping chamber lid 161 can be easily removed / attached during maintenance of the piping. Maintenance workability is improved. The piping chamber lid 161 can be configured to be inserted under the top plate 105 to obtain the same effect.

DESCRIPTION OF SYMBOLS 1: Indoor unit main body, 1a: Suction inlet, 1b: Air outlet, 2A: Air inlet duct, 2B: Air outlet duct, 3A: Air inlet grille, 3B: Air outlet grille, 4: Indoor space, 5: Ceiling space, 6: Ceiling 101 : Safety drain pan, 101a: Frame, 102: Front plate, 103: Back plate, 104: Side plate, 105: Top plate, 106: Partition plate, 106a: Through hole, 107: Suction duct mounting frame, 108: Blowout duct mounting Frame 120: Blower chamber 130: Electrical component chamber 131: Electrical component chamber rear plate 132: Electrical component chamber side plate 132a: Through hole 132b: Mounting portion 133: Electrical component chamber lid 134: Electrical component chamber bottom plate , 134a: Raised bottom side surface, 134b: Air intake port, 135: Electrical component mounting fixture, 136: Reactor, 137: Condenser 140: Heat exchanger, 141: Heat exchange side plate, 142: Drain pan 150: Wind device, 151: rotating shaft, 152: blower fan, 153: motor support, 154: motor, 155: bearing fixture, 156: bearing fixture, 157: fan casing, 158: mounting base 160: piping chamber, 161 : Piping chamber lid, 161a: Opening, 161b: Notch, 162: Piping cover, 162a: Notch, 163: Refrigerant piping, 164: Thermistor mounting cover, 165: External connection piping 200: Indoor unit body 210: Enclosure Body, 211: side plate, 211a: opening 220: blower fan 230: heat exchanger 240: electrical component room, 341: protrusion

Claims (4)

At least a front plate having an air outlet, a back plate having a suction port, a safety drain pan having a frame and serving as a bottom plate, a top plate covering the entire top surface, one end of the front plate and the back plate A duct-type air that forms a housing with a side plate connecting one end of the front plate, fixes a blower on the back side of the front plate, and arranges a heat exchanger on the back side of the back plate to constitute the main body of the indoor unit In the indoor unit of the harmony machine,
A partition plate that divides the inside of the housing into left and right sides is provided, one end of the partition plate is fixed to the back surface of the front plate, and heat for holding the heat exchanger in a vertical posture on the pipe outlet side of the heat exchanger An exchange side plate is arranged, one end of the heat exchange side plate is fixed to the back plate, the other end of the heat exchange side plate and the other end of the partition plate are fixed to each other, and the heat exchange side plate and the partition plate are arranged in a row. A blower chamber in which the blower and the heat exchanger are arranged on one side partitioned by the partition wall is formed, and an electrical component chamber is formed on the other side partitioned by the partition wall. The electrical component chamber includes an electrical component chamber bottom plate disposed in a raised shape with respect to the safety drain pan, and air is provided between the safety drain pan and the electrical component chamber bottom plate on the electrical component chamber bottom plate. Forming an air intake for leading,
The air in the ceiling is guided from the inside of the frame of the safety drain pan to the air intake, and an air passage is formed to guide the air from the air intake to the electrical component chamber, and further from the electrical component chamber to the blower chamber. Duct type air conditioner indoor unit. In the indoor unit of the duct type air conditioner according to claim 1,
With respect to the electrical component chamber side plate arranged in parallel to the partition plate, the electrical component chamber rear plate that is bent in an L shape with respect to the electrical component chamber side plate, and the safety drain pan. As a space closed by the bottom plate of the electrical component room arranged in a raised bottom shape, an electrical component chamber lid for closing the electrical component chamber with respect to the outside, a part of the top plate, and a part of the front plate Configure
In addition, a first gap is formed between the electrical component chamber bottom plate and a part of the front plate, and a second gap is formed between the frame of the safety drain pan and the electrical component chamber lid. , An air intake is formed on the bottom side surface of the electrical component chamber bottom plate facing the frame of the safety drain pan, and a through hole communicating with the partition plate and the electrical component chamber side plate is formed.
The air passage is a passage that sequentially passes through the second gap, the air intake, the lower surface of the bottom plate of the electrical component chamber, the first clearance, the interior of the electrical component chamber, and the through hole. A duct-type air conditioner indoor unit. In the indoor unit of the duct type air conditioner according to claim 1 or 2,
An indoor unit of a duct-type air conditioner, wherein at least a reactor and a capacitor are included in the air passage that passes through the interior of the electrical component room. In the indoor unit of the duct type air conditioner according to claim 2 or 3,
A duct type air conditioner characterized in that the position of the air intake formed in the raised bottom side surface of the electrical component room bottom plate is biased toward the electrical component chamber rear plate side of the electrical component chamber bottom plate. Indoor unit.

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