JP2012207801A - Wall embedded type air conditioning indoor unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wall embedded type air conditioning indoor unit increasing heat exchanging efficiency and reducing risk of complication of installing work and impossibility of installation.SOLUTION: The air conditioning indoor unit 10 is installed by being embedded in a sidewall H in a room and includes a casing 12, an indoor heat exchanger, second auxiliary refrigerant piping 36 extending from the indoor heat exchanger, a connection part 33 connecting the second auxiliary refrigerant piping 36 with communication piping 32 extending from an air conditioning outdoor unit, and an electrical equipment box 40 having an almost rectangular parallelopiped shape setting a lateral direction of the casing 12 as its longitudinal direction. The connection part 33 is positioned on an upper side of the casing 12. The electrical equipment box 40 is arranged on the upper side of the casing 12 and at a predetermined position on the side closer to a front face than the position of the connection part 33 to which the second auxiliary refrigerant piping 36 and the communication piping 32 have been connected.

Description

  The present invention relates to a wall-embedded air-conditioning indoor unit that is embedded in a side wall of a room.

  2. Description of the Related Art Conventionally, there are wall-embedded air-conditioning indoor units that are embedded in a side wall of a room. For example, as disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 9-79658), the wall-embedded air-conditioning indoor unit includes an electrical component box in which electrical components are stored in a casing and indoor heat exchange. In many cases, the electrical equipment box is disposed on the side of the indoor heat exchanger.

  By the way, in order to improve the heat exchange efficiency by the indoor heat exchanger, it is conceivable to increase the size of the indoor heat exchanger. Therefore, in the conventional wall-embedded air conditioning indoor unit, if the size of the indoor heat exchanger is increased by increasing the horizontal dimension of the indoor heat exchanger, the horizontal direction of the casing in which the indoor heat exchanger is accommodated Therefore, the size of the wall-embedded air-conditioning indoor unit becomes larger than before. Then, when this large-wall-embedded air-conditioned room unit is installed on the side wall of the room where the conventional wall-embedded air-conditioned room unit is installed, the opening provided in the side wall is further expanded. Work is required and installation work may be complicated. In addition, when a conventional wall-embedded air-conditioning indoor unit is installed between the columns in the half, even if you try to install a wall-embedded air-conditioning indoor unit that is larger than the conventional size, the space between the columns is widened. There is a risk that it will not be possible to install.

  Accordingly, an object of the present invention is to provide a wall-embedded air-conditioning indoor unit that can improve heat exchange efficiency and can reduce the risk of complicated installation work or installation failure. There is.

  A wall-embedded air-conditioning indoor unit according to a first aspect of the present invention is a wall-embedded air-conditioning indoor unit that is installed embedded in a side wall of a room, and includes a casing, an indoor heat exchanger, an auxiliary pipe, And a connection part and an electrical component box. A suction port is formed in the casing. Moreover, the suction inlet is formed in the front side which faces a room in the state in which the casing was installed in the side wall. The indoor heat exchanger is housed in a casing and performs heat exchange of room air taken in from the suction port. The auxiliary pipe extends from the indoor heat exchanger. The connecting portion is for connecting the auxiliary piping and the communication piping extending from the air conditioning room outside unit. The electrical component box has a substantially rectangular parallelepiped shape whose longitudinal direction is the left-right direction of the casing. Moreover, the connection part is located above the casing. Further, the electrical component box is disposed on the upper side of the casing and at a first predetermined position on the front side with respect to the position of the connecting portion after the auxiliary pipe and the connecting pipe are connected.

  In the wall-embedded air-conditioning indoor unit according to the first aspect of the present invention, the electrical component box is on the upper side of the casing and on the front side from the position of the connecting portion after the auxiliary pipe and the connecting pipe are connected. Is arranged at the first predetermined position. For this reason, since the dimension of the indoor heat exchanger can be extended to the part where the electrical component box is installed in the conventional wall-embedded air-conditioning indoor unit, the indoor heat can be increased without increasing the horizontal dimension of the casing. The horizontal dimension of the exchanger can be increased.

  As a result, the heat exchange efficiency can be improved, and the possibility that the installation work becomes complicated or cannot be installed can be reduced.

  The wall-embedded air-conditioning indoor unit according to the second aspect of the present invention is the wall-embedded air-conditioning indoor unit according to the first aspect, wherein the dimension of the electrical component box in the left-right direction communicates with the auxiliary pipe from the left end of the casing. It is shorter than the dimension to the connection part after the pipe is connected, or the dimension from the right end of the casing to the connection part after the auxiliary pipe and the connection pipe are connected. For this reason, a 1st predetermined position can be set so that an electrical component box may not be located in the front of a connection part.

  Thereby, workability | operativity of the connection operation | work with refrigerant | coolant piping and communication piping can be improved.

  The wall-embedded air-conditioned room unit according to the third aspect of the present invention is the wall-embedded air-conditioned room unit according to the first or second aspect, wherein the electrical component box is detachably attached to the casing. For this reason, in this wall-embedded air conditioning indoor unit, the electrical component box can be attached to the casing after the refrigerant pipe and the connecting pipe are connected. Therefore, since a work space for connecting the refrigerant pipe and the communication pipe can be secured, it is possible to improve workability at the time of connecting the refrigerant pipe and the communication pipe.

  The wall-embedded air-conditioned room unit according to the fourth aspect of the present invention is the wall-embedded air-conditioned room unit according to the first or second aspect, wherein the electrical component box is connected to an electric wire extending from the inside of the casing, In a state where it is connected to the electric wire, it can be moved to a second predetermined position that is farther from the connecting portion than the first predetermined position. For this reason, in this wall-embedded air-conditioning indoor unit, the electrical component box can be moved to the second predetermined position when the refrigerant pipe and the connecting pipe are connected. Therefore, since a work space can be ensured on the front side of the connecting portion, workability at the time of connecting work between the refrigerant pipe and the connecting pipe can be improved.

  In the wall-embedded air-conditioning indoor unit according to the first aspect of the present invention, the heat exchange efficiency can be improved, and the possibility that the installation work becomes complicated or cannot be installed can be reduced.

  In the wall-embedded air-conditioning indoor unit according to the second aspect of the present invention, the workability of the connection work between the refrigerant pipe and the communication pipe can be improved.

  In the wall-embedded air-conditioning indoor unit according to the third aspect of the present invention, it is possible to improve workability at the time of connecting the refrigerant pipe and the connecting pipe.

  In the wall-embedded air-conditioning indoor unit according to the fourth aspect of the present invention, it is possible to improve workability at the time of connecting the refrigerant pipe and the connecting pipe.

The front view of the air-conditioning indoor unit which concerns on one Embodiment of this invention. The longitudinal cross-sectional view of the air-conditioning indoor unit which concerns on one Embodiment of this invention. The top view of the air-conditioning indoor unit which concerns on one Embodiment of this invention. (A) Front view of conventional air-conditioning indoor unit (front grill and decorative plate omitted), (b) Front view of air-conditioned indoor unit according to one embodiment of the present invention (front grill and decorative plate omitted). The longitudinal cross-sectional view of the conventional air-conditioning indoor unit. The figure for demonstrating the installation work of the air-conditioning indoor unit which concerns on the modification A. FIG. The top view of the air-conditioning indoor unit which concerns on the modification B. The figure for demonstrating the installation work of the air-conditioning indoor unit which concerns on the reference example A. FIG. (A) The schematic longitudinal cross-sectional view of the air-conditioning indoor unit which concerns on one Embodiment of this invention, (b) The schematic vertical cross-sectional view of the air-conditioning indoor unit which concerns on the reference example B.

  Hereinafter, an air-conditioning indoor unit 10 according to an embodiment of the present invention will be described with reference to the drawings. The following embodiments are specific examples of the present invention and do not limit the technical scope of the present invention.

(1) Configuration of Air-Conditioning Indoor Unit The air-conditioned indoor unit 10 is an indoor unit of an air conditioner of the type that is installed in the indoor side wall H. As shown in FIGS. 1 and 2, the air conditioning indoor unit 10 includes a casing 11, an indoor heat exchanger 20, an auxiliary pipe 31, a connection portion 33, an electrical component box 40, and a decorative board 12. ing. Hereinafter, the configuration of the air conditioning indoor unit 10 will be described.

(1-1) Casing The casing 11 includes a frame 13 and a front grille 14. The frame 13 is a substantially rectangular box-shaped member having an opening 15 on the front side (front side). In addition, the front side of the frame 13 in this embodiment means the side facing the room in a state where the casing 11 is installed in the side wall H of the room. Inside the frame 13, a suction space 16a and a blowing space 16b are formed.

  Further, the cross flow fan 60, the indoor heat exchanger 20 and the like are accommodated in the frame 13. The cross flow fan 60 has a cylindrical shape, and the peripheral surface is provided with blades in the direction of the rotation axis. Further, the cross flow fan 60 is driven to generate an air flow in a direction intersecting with the rotation axis. For this reason, the cross flow fan 60 sucks indoor air into the suction space 16a in the frame 13 and allows the air after heat exchange with the indoor heat exchanger 20 to pass through the blowing space 16b. Can be blown into the room.

  The front grille 14 is attached to the front side of the frame 13, that is, the front surface of the frame 13 so as to cover the opening 15 of the frame 13. Further, the front grill 14 is provided with a suction port 17 and a blowout port 18. The suction port 17 is a plurality of slit-like openings that are long in the longitudinal direction of the air-conditioning indoor unit 10, that is, in the horizontal direction. The suction port 17 is an opening for taking indoor air into the casing 11 and is disposed at a position facing the suction space 16a. Moreover, the blowout port 18 is provided in the lower part of the front grille 14, and is arrange | positioned in the position facing the blowout space 16b. A horizontal flap 19 is provided in the vicinity of the outlet 18. The horizontal flap 19 is a substantially rectangular plate-like member, and guides the air blown out from the blowout port 18. Specifically, the horizontal flap 19 has a rotation axis parallel to the longitudinal direction of the air-conditioning indoor unit 10, and changes the air guiding direction by being driven to rotate about the rotation axis. The air taken into the casing 11 from the room through the suction port 17 is harmonized by heat exchange and blown out into the room through the air outlet 18.

(1-2) Indoor heat exchanger The indoor heat exchanger 20 is arrange | positioned so that the front of the crossflow fan 60 may be covered, as shown in FIG. The indoor heat exchanger 20 includes a heat transfer tube that is bent back and forth at both ends in the longitudinal direction, and a plurality of fins 21 through which the heat transfer tube passes. In the indoor heat exchanger 20, heat exchange is performed between the air sucked from the suction port 17 by the rotation of the cross flow fan 60 and the refrigerant passing through the heat transfer tube. Further, the heat transfer tubes are folded back in a U shape at both ends in the longitudinal direction of the indoor heat exchanger 20. Further, the heat transfer pipe of the indoor heat exchanger 20 is connected to the auxiliary pipe 31.

(1-3) Auxiliary piping The auxiliary piping 31 is piping extended from the indoor heat exchanger 20, and is connected with the connection piping 32 extended from the outdoor heat exchanger which an air-conditioning outdoor unit (not shown) has. The auxiliary pipe 31 and the communication pipe 32 connect the indoor heat exchanger 20 and the outdoor heat exchanger to constitute a refrigerant circuit. The auxiliary pipe 31 includes a liquid pipe 31a and a gas pipe 31b for circulating the refrigerant in the refrigerant circuit. Further, the auxiliary pipe 31 has a first auxiliary refrigerant pipe 35 and a second auxiliary refrigerant pipe 36. The first auxiliary refrigerant pipe 35 is connected to a heat transfer pipe protruding from the side surface of the indoor heat exchanger 20. The second auxiliary refrigerant pipe 36 is continuous with the auxiliary pipe 31. Here, the first auxiliary refrigerant pipe 35 refers to a pipe located on the side of the indoor heat exchanger 20, and the second auxiliary refrigerant pipe 36 refers to the air conditioning indoor unit 10 on the side wall H. In the installed state, the pipe is routed above the frame top surface 13a, that is, above the indoor heat exchanger 20, and extends in the left-right direction of the casing 11.

(1-4) Connection Portion The connection portion 33 is for connecting the auxiliary pipe 31 and the communication pipe 32. The connecting portion 33 is disposed at the end of the second auxiliary refrigerant pipe 36 and is disposed above the frame top surface 13a in a state where the air conditioning indoor unit 10 is installed on the side wall H. In the present embodiment, the connection portion 33 refers to the flare nut 33 a disposed at the end of the second auxiliary refrigerant pipe 36. In addition, the communication pipe 32 is a pipe for connecting the outdoor heat exchanger and the indoor heat exchanger 20 and includes a liquid communication pipe 32a and a gas communication pipe 32b. The liquid communication pipe 32a and the gas communication pipe 32b are respectively connected to the liquid pipe 31a and the gas pipe 31b by a flare nut 33a.

(1-5) Electrical component box The electrical component box 40 is a box-shaped member having a substantially rectangular parallelepiped shape, and is a component such as a capacitor or a transistor, or a light emitting element for driving each component device included in the air conditioning indoor unit 10. It accommodates electrical components such as a control board to which components such as 41a and light receiving elements are attached. A part of the light emitting element 41 a is exposed from the electrical component box 40 so as to function as the display unit 41. Furthermore, an electrical component box side opening (not shown) for passing wiring connected to the electrical component is formed on the bottom surface 40a of the electrical component box 40. A connector (not shown) is provided at the end of the wiring, and is electrically connected to each component device provided in the air conditioning indoor unit 10 by being connected to a wiring connector (not shown) extending from the inside of the casing 11. Connected to. The electrical component box 40 is detachably attached to the casing 11 with such a configuration.

  In the present embodiment, as shown in FIGS. 2 and 3, the electrical component box 40 is on the upper side of the frame top surface 13 a in the state where the air conditioning indoor unit 10 is installed on the side wall H, and the second auxiliary It is assumed that it is arranged at a predetermined position (corresponding to a first predetermined position) in front of the positions of the refrigerant pipe 36 and the connection portion 33, that is, in front of the positions of the second auxiliary refrigerant pipe 36 and the connection portion 33. In the state where the electrical component box 40 is disposed at a predetermined position, the left-right direction of the casing 11 is the longitudinal direction (see FIGS. 1 and 3).

  In this embodiment, the display unit 41 is provided in a part of the electrical component box 40. However, the display unit 41 is not limited to this, and the display unit 41 is provided separately from the electrical component box 40, and is displayed as the electrical component box 40. You may arrange | position in the position away from the part 41. FIG.

(1-6) Decorative plate The decorative plate 12 is more forward than the positions of the connecting portion 33, the connecting pipe 32, and the electrical component box 40 so that the connecting portion 33 and the connecting pipe 32 are difficult to visually recognize from the user who is in the room. It is an elongate plate-shaped member arrange | positioned. Further, the decorative plate 12 is fixed to the casing 11 after connecting the connecting pipe 32 and the auxiliary pipe 31 and arranging the electrical component box 40 at a predetermined position in the installation work of the air conditioning indoor unit 10. In the present embodiment, the dimension in the longitudinal direction of the decorative plate 12 is larger than the dimension from the left end of the frame 13 to the connecting portion 33, and the right end of the decorative plate 12 is disposed at a predetermined position. It overlaps with the left end of the electrical component box 40. Further, since the decorative plate 12 is fixed to the casing 11, the forward movement of the electrical component box 40 is restricted.

(2) Installation Work of Air Conditioning Indoor Unit Next, the installation work of the air conditioning indoor unit 10 will be described.

  First, the installation frame 80 is installed along the edge of the installation opening provided in the side wall H, and the frame 13 accommodated in the indoor heat exchanger 20 or the like is fixed to a predetermined position of the installation frame 80. Next, the second auxiliary refrigerant pipe 36 is routed to the upper side of the frame top surface 13a, and the second auxiliary refrigerant pipe 36 and the communication pipe 32 are connected using the flare nut 33a. Thereafter, the wiring extending from the electrical component box 40 and the wiring extending from the frame 13 are connected, and the electrical component box 40 is arranged at a predetermined position on the frame top surface 13a. Then, the decorative plate 12 is attached to the frame 13 by means such as screwing, and the front grille 14 is fixed to the frame 13 and the installation frame 80, whereby the installation operation of the air conditioning indoor unit 10 is completed.

(3) Features (3-1)
FIG. 4A is a front view of a conventional wall-embedded air-conditioned room unit 510, and FIG. 4B is a front view of the wall-embedded air-conditioned room unit 10 according to the present embodiment. FIG. 5 is a longitudinal sectional view of the wall-embedded air-conditioning indoor unit 510. In FIG. 4A, reference numeral 541 indicates a display unit. In FIG. 4, the front grille and the decorative plate are omitted.

  In the conventional wall-embedded air-conditioning indoor unit 510, in order to improve the heat exchange efficiency of the indoor heat exchanger 520, if the dimension L2 in the left-right direction of the indoor heat exchanger 520 is increased, the indoor heat exchanger 520 It is necessary to lengthen the dimension in the left-right direction of the frame 513 in which the frame is stored. Then, if the air-conditioning indoor unit having the longer dimension L2 in the left-right direction is installed on the side wall H in the room where the conventional wall-embedded air-conditioning indoor unit 510 is installed, the opening provided in the side wall H The work for further extending the width is required, and the installation work becomes complicated. In addition, when the conventional wall-embedded air-conditioning indoor unit 510 is installed between the columns in the half, the space between the columns can be widened even if an air-conditioning indoor unit having a longer horizontal dimension L2 is installed. Because it is not possible, there is a risk that it cannot be installed.

  Therefore, in the present embodiment, the outlet position of the second auxiliary refrigerant pipe 36 is set on the back side (rear side) of the outlet position of the second auxiliary refrigerant pipe 536 of the conventional air conditioning indoor unit 510, and at least the auxiliary pipe 31. The connection portion 33 is disposed on the upper side of the frame 13 during and after connection to the communication pipe 32. Furthermore, the electrical component box 40 is disposed at a predetermined position on the front side of the position of the connecting portion 33 after the auxiliary pipe 31 and the connecting pipe are connected. For this reason, since the dimension of an indoor heat exchanger can be extended to the part in which the electrical component box 540 was installed in the conventional air-conditioning indoor unit 510 as shown in FIG. 4A and FIG. The length L1 in the left-right direction of the indoor heat exchanger 20 can be increased without increasing the size in the left-right direction.

  As a result, the heat exchange efficiency can be improved, and the possibility that the installation work becomes complicated or cannot be installed can be reduced. In addition, energy saving operation can be achieved by improving the heat exchange efficiency.

  Further, in the conventional air-conditioning indoor unit 510, in order to improve heat exchange efficiency, it is conceivable to increase the air volume of the cross flow fan 560. However, if the air volume is increased, the operation sound of the cross flow fan 560 increases. End up. Furthermore, in order to improve the heat exchange efficiency of the indoor heat exchanger 520, it may be possible to improve the performance of the indoor heat exchanger 520 without changing the size, but the configuration of the indoor heat exchanger 520 may be complicated. There is.

  Therefore, in the present embodiment, the electrical component box 40 is disposed on the front side of the position of the second auxiliary refrigerant pipe 36 and the connection portion 33, so that the indoor heat exchange can be performed without increasing the horizontal dimension of the casing 11. Since the dimension L1 in the left-right direction of the vessel 20 can be increased, the heat exchange efficiency can be improved with the indoor heat exchanger 20 having an uncomplicated configuration and without increasing the air volume of the cross flow fan 60. ing.

  Furthermore, in this embodiment, since the electrical component box 40 is disposed on the upper side of the casing 11, the dimension of the fan rotor of the cross flow fan 60 can be increased without increasing the dimension of the casing 11 in the left-right direction. it can. Therefore, the air volume can be increased without increasing the diameter of the cross flow fan 60.

(3-2)
In the present embodiment, the electrical component box 40 is disposed on the upper side of the frame top surface 13a in a state in which the air conditioning indoor unit 10 is installed on the side wall H. For this reason, the possibility that drain water generated in the indoor heat exchanger 20 flows into the electrical component box 40 can be reduced.

  By the way, when the electrical component box is disposed in the air flow path in the vicinity of the suction port inside the frame, there is a possibility that the ventilation resistance increases and the air volume decreases. In order to compensate for the decrease in the air volume, it is necessary to increase the driving amount of the cross flow fan. However, in the present embodiment, since the second auxiliary refrigerant pipe 36, the connection portion 33, and the electrical component box 40 are arranged on the upper side of the frame top surface 13a, the second auxiliary refrigerant pipe 36, the connection portion 33, and the electrical component box 40 are arranged in the air flow path near the suction port. Ventilation resistance due to the refrigerant pipe 36, the connection portion 33, and the electrical component box 40 does not occur. Thereby, the possibility that the air volume may be reduced can be reduced.

(3-3)
In the present embodiment, the electrical component box 40 is detachably attached to the casing 11. For this reason, in the installation work of the air conditioning indoor unit 10, after connecting the second auxiliary refrigerant pipe 36 and the communication pipe 32, the wiring extending from the electrical component box 40 and the wiring extending from the frame 13 are connected to each other. 40 can be arranged at a predetermined position on the frame top surface 13a. Accordingly, since a work space for performing the connection work between the second auxiliary refrigerant pipe 36 and the communication pipe 32 can be secured sufficiently, the workability of the connection work can be improved.

(4) Modification (4-1) Modification A
In the above embodiment, the electrical component box 40 is detachably attached to the frame 13.

  Instead of this, the electrical component box may be moved from the front of the connecting portion in a state where the wiring extending from the frame and the wiring extending from the electrical component box are connected.

  For example, as illustrated in FIG. 6, the electrical component box 140 may include a hinge structure that is rotatable about a fulcrum. More specifically, an electrical component box side opening 140aa through which wiring passes is provided at the right end of the bottom surface of the electrical component box 140, and the electrical component box 140 is disposed at a predetermined position on the frame top surface 113a of the frame 113. A frame-side opening 113b through which the wiring passes is provided at a position facing the electrical component box-side opening 140aa, and the wiring extends to a certain degree of freedom so that the wiring moves according to the rotation of the electrical component box 140. In a state where the wiring and the wiring extending from the electrical component box 140 are connected, the electrical component box 140 can be moved from the front side of the connection portion 33.

  When installing an air-conditioning indoor unit having such a configuration, first, an installation frame is installed along the edge of the installation opening provided on the side wall H, and the electrical component in the electrical component box 140 is connected to the electrical component by wiring. The frame 113 is fixed at a predetermined position of the installation frame. Next, as shown in FIG. 6, the electrical component box 140 is rotated and moved in a direction away from the connection portion 33 from a predetermined position with the wiring passing through the electrical component box side opening 140aa and the frame side opening 113b as a fulcrum ( For example, after the electrical component box 140 is rotated 90 degrees and disposed at a position different from the predetermined position (corresponding to the second predetermined position), the flare nut is used to connect the second auxiliary refrigerant pipe 36 and the communication pipe 32. And connect. Thereafter, the electrical component box 140 is moved to a predetermined position, and the decorative plate is attached to the frame 113 by means such as screwing. Then, by fixing the front grill to the frame 113 and the installation frame, the installation operation of the air conditioning indoor unit is completed.

  As described above, the electrical component box 140 connected to the wiring extending from the inside of the frame 113 can be moved to a position farther from the connecting portion 33 than the predetermined position, thereby connecting the second auxiliary refrigerant pipe 36 and the communication pipe. Thus, a work space for connecting to the terminal 32 can be secured. As a result, the workability at the time of connecting the second auxiliary refrigerant pipe 36 and the communication pipe 32 can be improved. Further, as compared with the case where the electrical component box is detachably provided on the casing, it is not necessary to provide a connector or the like at the end of the wiring, resulting in a simple configuration.

  In FIG. 6, the configuration other than the configuration of the electrical component box 140 and the frame 113 is the same as that of the above-described embodiment. The code | symbol is attached | subjected.

(4-2) Modification B
In the said embodiment, when the electrical component box 40 is installed in the predetermined position, the electrical component box 40 is arrange | positioned in the front of the connection part 33 (refer FIG. 3).

  Instead of this, even if the electrical component box is installed at a predetermined position, the second auxiliary refrigerant pipe may be designed so that the electrical component box is not disposed in front of the connection portion. For example, as shown in FIG. 7, the second auxiliary refrigerant pipe 436 is designed so that the dimension L3 in the left-right direction of the electrical component box 40 is shorter than the dimension L4 from the right end of the casing 11 to the connection part 33. May be. Thus, when the 2nd auxiliary refrigerant | coolant piping 436 is designed, a predetermined position can be set so that the electrical component box 40 may not be arrange | positioned in the front side of the connection part 33. FIG. Therefore, even when the electrical component box 40 is installed at a predetermined position, a work space for connecting the second auxiliary refrigerant pipe 436 and the communication pipe 432 can be secured. Can be improved. In FIG. 7, the predetermined position of the electrical component box 40 is set on the right side of the center of the casing 11, but the present invention is not limited to this, and the dimension from the left end of the casing 11 to the connection portion is the electrical component. When the second auxiliary refrigerant pipe is designed to be longer than the horizontal dimension of the box, the electrical component box is positioned at a predetermined position of the casing so that the electrical box is not arranged on the front side of the connection portion. It may be set on the left side of the center.

(5) Reference example (5-1) Reference example A
In the said embodiment, the electrical component box 40 is arrange | positioned in the state by which the air-conditioning indoor unit 10 was installed in the side wall H in the front side (front side) rather than the position of the connection part 33 (refer FIG. 3).

  Instead, in order to improve the workability of the pipe connection work, the connection part and the electrical component box may be arranged side by side in the left-right direction. For example, as shown in FIG. 8, by bending the end of the second auxiliary refrigerant pipe 236 into a U-shape and arranging the connecting portion 33 at the front part of the frame top surface 13a, the second auxiliary refrigerant pipe 236 and Workability at the time of connection work with the communication pipe 232 can be improved.

  In addition, in FIG. 8, since structures other than the structure of the 2nd auxiliary refrigerant | coolant piping 236 and the connection piping 232 are the same as that of the said embodiment, about structures other than the structure of the 2nd auxiliary refrigerant | coolant piping 236 and the communication piping 232, The same code | symbol as the said embodiment is attached | subjected.

(5-2) Reference example B
In the above embodiment, as shown in FIG. 9A, the electrical component box 40 is arranged on the upper side of the frame top surface 13a. Instead of this, if the electrical component box 340 is disposed inside the frame 313 (below the frame top surface 313a) as shown in FIG. Good. In FIG. 9B, the electrical component box 340 is disposed above the indoor heat exchanger 20, so that the possibility that drain water generated in the indoor heat exchanger 20 flows into the electrical component box 340 may be reduced. it can. In addition, when the electrical component box 340 is not located on the front side of the connection portion 33, a sufficient working space for connecting the second auxiliary refrigerant pipe 36 and the communication pipe 32 can be secured. Workability at the time of connection work can be improved.

  The present invention is an invention that can improve the heat exchange efficiency and reduce the possibility that the installation work becomes complicated or cannot be installed, and is applied to a wall-embedded air-conditioning indoor unit. Is effective.

DESCRIPTION OF SYMBOLS 10 Air-conditioning indoor unit 12 Casing 17 Suction inlet 20 Indoor heat exchanger 33 Connection part 36,436 2nd auxiliary refrigerant | coolant piping (auxiliary piping)
40,140 Electrical component box

Japanese Patent Laid-Open No. 9-79658

Claims (4)

A wall-embedded air conditioning indoor unit that is installed embedded in a side wall of a room,
A casing (20) in which a suction port is formed on the front side facing the room in a state of being installed in the side wall;
An indoor heat exchanger (21) housed in the casing and performing heat exchange of the room air taken in from the suction port;
Auxiliary piping extending from the indoor heat exchanger;
A connecting portion for connecting the auxiliary pipe and a communication pipe (42) extending from the air-conditioning outdoor unit;
An electrical component box (30) having a substantially rectangular parallelepiped shape with the left-right direction of the casing as a longitudinal direction;
With
The connecting portion is located above the casing;
The electrical component box is disposed on a first predetermined position on the front side of the connection portion after the auxiliary pipe and the connection pipe are connected to each other on the upper side of the casing.
A wall-embedded air-conditioning indoor unit (10). The dimension in the left-right direction of the electrical component box is shorter than the dimension from the left end of the casing or the right end of the casing to the connection after the auxiliary pipe and the connection pipe are connected. ,
The wall-embedded air-conditioned room unit according to claim 1. The electrical component box is detachably attached to the casing.
The wall-embedded air-conditioned room unit according to claim 1 or 2. The electrical component box is connected to an electric wire extending from the inside of the casing, and is movable to a second predetermined position farther from the connection portion than the first predetermined position in a state of being connected to the electric wire.
The wall-embedded air-conditioned room unit according to claim 1 or 2.

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