JP5673059B2 - Duct type air conditioner indoor unit - Google Patents

Description

  The present invention relates to an indoor unit of a duct-type air conditioner that achieves accurate temperature detection and maintenance of refrigerant piping.

  As an indoor unit of a conventional duct type air conditioner, for example, as shown in FIGS. 12 to 14, the internal configuration of the indoor unit body 200 is driven by a motor 221 inside a front plate 212 having a blowout duct mounting frame 211. The air blower 220 is attached, the heat exchanger 230 is arranged inside the back plate 214 having the suction duct attachment frame 213, the electrical component chamber 240 is arranged on the outer wall surface of the side plate 215 of the indoor unit body 200, There is one in which a pipe connection port 231 is drawn out to a side plate 215 and the part is covered with a pipe cover 216 (Patent Document 1).

JP 2004-204810 A

  The heat exchanger 230 of the air conditioner is not limited to the duct type, and includes a plurality of U-shaped refrigerant tubes and a plurality of radiating fins for heat exchange between air and the refrigerant. The heat exchanger 230 includes a refrigerant tube, A path pipe, a flow divider (a merging device depending on the state of the refrigeration cycle), a liquid pipe, a gas pipe, an electronic expansion valve, or the like connected to the refrigerant pipe is connected. The piping in the vicinity of the heat exchanger 230 is provided with a piping thermistor (temperature sensor) that detects the temperature of the refrigerant flowing out of the heat exchanger 230 (inflow depending on the state of the refrigeration cycle).

  However, in the configuration as disclosed in Patent Document 1, the air sucked into the indoor unit main body 200 from the air-conditioned room (not shown) by the blower 220 passes not only the heat exchanger 230 but also the surroundings of the heat exchanger 230. Therefore, the pipe thermistor for detecting the temperature of the refrigerant is affected by the air passing therethrough, and it is difficult to accurately detect the temperature of the refrigerant.

  In addition, the ambient temperature of the heat exchanger 230 is such that the air around the heat exchanger 230 is radiated from the heat exchanger 230, that is, the refrigerant pipe through which the refrigerant flows and the radiating fins attached to the refrigerant pipe. Since it is warmed (or cooled) by the radiated heat and cooled (or warmed) by the air passing through the heat exchanger 230, the temperature of the refrigerant flowing through the refrigerant pipe and the air passing through the heat exchanger 230 The temperature is between these temperatures. Therefore, as described above, when the pipe thermistor is arranged in the vicinity of the heat exchanger 230, the temperature of the refrigerant flowing through the refrigerant pipe and the ambient temperature of the heat exchanger 230 are different, so that the pipe thermistor is around the heat exchanger 230. It is difficult to accurately detect the temperature of the refrigerant under the influence of the heat of the air.

  Further, in the configuration of Patent Document 1, the electrical component chamber 240 is disposed on the outer wall surface of the side plate 215 of the indoor unit body 200. However, depending on the configuration, the electrical component chamber 240 is disposed inside the indoor unit body 200. In addition, since there are heat generating components inside the electrical component chamber 240, it is necessary to devise a piping thermistor so that the electrical component chamber is not affected by the heat.

  Furthermore, when maintaining the pipe thermistor and the electronic expansion valve, the pipe cover 216 for attaching the pipe connection port 231 cannot be checked up to the inside even if it is removed, and the indoor unit body 200 needs to be disassembled.

  The object of the present invention is to detect the temperature of the refrigerant pipe by a temperature sensor such as a pipe thermistor without being affected by the heat of the air passing through the heat exchanger or the heat of the heat exchanger or the heat of the electrical component room. It is another object of the present invention to provide a duct type air conditioner indoor unit that can easily perform maintenance such as a temperature sensor.

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 also serving as a bottom plate, and a top plate covering the entire top surface. A casing is composed of one end of the front plate and a side plate connecting one end of the back plate, a blower is fixed to the back surface of the front plate, and a heat exchanger is disposed on the back surface of the back plate. In the indoor unit of the duct type air conditioner constituting the indoor unit main body, a partition plate that divides the inside of the housing into right and left is provided, one end of the partition plate is fixed to the back surface of the front plate, and the heat exchanger A heat exchange side plate for holding the heat exchanger in a vertical posture is arranged on the pipe outlet side, 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 of the partition plate The ends are fixed to each other, and the heat exchange side plate and the partition plate are erected in a row. An air blow chamber is formed on one side partitioned by the partition wall, and the blower chamber and the heat exchanger are disposed on the other side, and an electrical component chamber and a piping chamber are formed on the other side partitioned by the partition wall. A temperature sensor is attached to the refrigerant pipe of the heat exchanger drawn into the piping chamber, and the piping chamber includes a part of the partition wall and an electrical component chamber back plate that closes one surface of the electrical component chamber. The periphery is closed by the back plate and the detachable piping chamber lid, and the upper surface is closed by a part of the top plate .
According to a second aspect of the present invention, in the indoor unit of the duct-type air conditioner according to the first aspect, a pipe cover through which an external connection pipe continuing to the refrigerant pipe is detachably attached to the pipe chamber lid. It is characterized by being.

  According to the present invention, the temperature sensor in the piping chamber separated from the blower chamber and the electrical component chamber is not affected by the air passing through the heat exchanger and the heat generated in the electrical component chamber. Accurate temperature detection can be performed. In addition, by making the piping chamber lid detachable, the temperature sensor inside the piping chamber and other maintenance workability can be improved.

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 perspective view of the indoor unit main body of the indoor unit of the conventional duct type air conditioner. It is sectional drawing of the indoor unit main body of the indoor unit of the conventional duct type air conditioner. It is explanatory drawing of the air blower 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 with the refrigerant in the heat exchanger 140, and then is blown from the blower outlet 1b. It passes through 2B and the blowout duct 3B and is blown out 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). Then, the electrical component chamber side plate 132 and the partition plate 106 are arranged in parallel by the electrical component chamber mounting tool 135 mounted between the electrical component chamber side plate 132 and the partition plate 106, and an interval X is formed therebetween (see FIG. 7). A reactor 136, a capacitor 137, and other electrical components are attached inside the electrical component chamber 130 (see FIG. 8). Note that the reactor 136 and the capacitor 137 are arranged at the upper corners 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, the raised bottom electrical component chamber bottom plate 134 is formed with a notch air intake 134 a that is not blocked by the electrical component chamber lid 133 on the raised bottom side surface facing the frame 101 a of the safety drain pan 101. . The electrical component chamber bottom plate 134 is formed to be narrower than the front and rear width of the electrical component chamber side plate 132. Therefore, as shown in FIG. 10, the electrical component chamber bottom plate 134 is located between the back surface of the front plate 102 and the electrical component chamber bottom plate 134. Thus, a gap G1 is formed in the lower corner of the electrical component chamber 130. 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 by the blower 150 enters the air intake port 134a 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. In addition, 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 enters the electrical component chamber 130. Will not flow and will exit from the electrical component chamber through-hole 132a without affecting other parts.

  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 164 as a temperature sensor, an electronic expansion valve (not shown), and the like are arranged. The thermistor 164 has a rod-like shape and is provided with a cylindrical thermistor mounting cover for mounting formed by bending a copper plate, and the refrigerant pipe 163 is provided with the thermistor 164 so that the refrigerant temperature can be accurately detected. It is attached by a thermistor mounting cover. 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 164 having the thermistor mounting cover 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. Is not affected by the air passing through the heat exchanger 140, and the electrical component chamber rear plate 131 that separates the electrical component chamber 130 and the piping chamber 160 includes the heat exchange side plate 141 and the heat exchange side plate 141. The refrigerant flowing through the refrigerant pipe 163 without being affected by the temperature of the electrical component chamber 130 because it is arranged not on the joint of the partition plate 106 connected to the heat exchange side plate 141 in a row but on the partition plate 106 side. Detect temperature 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 is only the air that has passed through the heat exchanger 140 without being affected by the piping chamber 160, so efficient air blowing is possible. It becomes. 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 133: Electrical component chamber lid 134: Electrical component chamber bottom plate 134a: Air intake Inlet, 135: Electrical component chamber fixture, 136: Reactor, 137: Capacitor 140: Heat exchanger, 141: Heat exchanger side plate, 142: Drain pan 150: Blower, 151: Rotating shaft, 152: Blower 153: Motor support, 154: Motor, 155: Bearing fixing base, 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 main body 211: Blowing duct mounting frame, 212: Front plate, 213: Suction duct mounting frame, 214: back plate, 215: side plate, 216: piping cover 220: blower 230: heat exchanger, 231: piping connection port 240: electrical component room

Claims (2)

At least a front plate having an air outlet, a back plate having a suction port, a safety drain pan that also serves as a bottom plate, a top plate that covers the entire top surface, and a side that connects one end of the front plate and one end of the back plate In the indoor unit of a duct type air conditioner that constitutes a housing with a face plate, fixes a blower device on the back surface of the front plate, arranges a heat exchanger on the back surface of the back plate, and configures the indoor unit main body. ,
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, and an electrical component chamber on the other side partitioned by the partition wall Forming a piping chamber,
A temperature sensor is attached to the refrigerant pipe of the heat exchanger drawn into the pipe chamber ,
The circumference of the piping chamber is closed by a part of the partition wall, an electrical component chamber back plate that closes one surface of the electrical component chamber, the back plate, and a removable piping chamber lid. An indoor unit of a duct type air conditioner, characterized in that the upper surface is closed by a section . In the indoor unit of the duct type air conditioner according to claim 1,
An indoor unit of a duct-type air conditioner , wherein a pipe cover through which an external connection pipe continuing to the refrigerant pipe is detachably attached to the pipe chamber lid .

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