JP5267539B2 - Floor-standing indoor unit - Google Patents

Description

  The present invention relates to a floor-standing indoor unit provided with a substantially V-shaped heat exchanger having a front heat exchanger and a rear heat exchanger.

  As a conventional floor-standing indoor unit, one that sucks air in the vicinity of the floor surface from a suction port provided in front of the lower end portion of the casing and blows out from a blowout port provided in the upper end portion of the casing is known ( For example, see Patent Document 1). The air sucked from the suction port is supplied to the heat exchanger accommodated in the casing, and is heated by heat exchange with the refrigerant flowing in the heat exchanger. And the heated air blows off from a blower outlet.

Japanese Utility Model Publication No. 63-185023

  In the floor-standing indoor unit configured as described above, the front heat exchanger disposed so as to face the back of the front panel of the casing, and the back heat inclined upward as it approaches the back from the vicinity of the lower end of the front heat exchanger. It is conceivable to use a substantially V-shaped heat exchanger having an exchanger. When such a heat exchanger is used, the air sucked from the suction port provided in front of the lower end portion of the casing is less likely to flow to the rear heat exchanger side than to the front heat exchanger side. Therefore, sufficient air is not supplied to the back surface heat exchanger, causing a problem that the heat exchange efficiency of the heat exchanger is reduced.

  Then, this invention is made | formed in order to solve the above subjects, and it aims at providing the floor-standing indoor unit which can prevent the fall of heat exchange efficiency.

The floor-standing indoor unit according to the first invention has a front panel, a casing that houses a heat exchanger, a suction port that is provided in front of the lower end of the casing and sucks in air near the floor surface, A blower outlet that is provided at the upper end of the casing and blows out air, a filter that is provided in a flow path from the suction port to the heat exchanger in the casing, and a drain pan that is provided below the heat exchanger with the door, the heat exchanger, a front heat exchanger disposed so as to face the rear surface of the front panel, rear heat exchanger which is inclined upward as it approaches the rear from the vicinity of the lower end of the front heat exchanger has the door, along with air sucked from the suction port flows to the front heat exchanger, before a part of the air flowing through the front heat exchanger is divided in the lower than the drain pan Is configured to supply the back heat exchanger, the front-rear direction length of the drain pan is substantially the same as the longitudinal direction length of the heat exchanger, and the rear end of the drain pan from the rear end of the suction port It is arranged on the back side, the filter is inserted between the front panel and the front heat exchanger, and its lower end is arranged near the rear edge of the suction port , At least a portion below the drain pan is convexly curved forward.

  Note that “(the suction port) is provided in front of the lower end portion of the casing” means that the portion formed on the front side of the lower end portion of the casing in front of the front-rear direction center position is on the rear side of the front-rear direction center position. It means that the suction port is provided so that it may become larger than the part currently formed in this.

In this floor-standing indoor unit, the area of the filter below the drain pan is increased and the ventilation resistance is reduced compared to the case where the filter is not curved in the flow path from the suction port to the rear heat exchanger. Can be small. Therefore, the air sucked from the suction port provided in front of the lower end portion of the casing is likely to flow to the back side through the filter below the drain pan . Therefore, it is possible to suppress a shortage of air supply to the rear heat exchanger and suppress a decrease in heat exchange efficiency of the heat exchanger.
In this floor-standing indoor unit, since the drain pan is provided, it becomes difficult for air to be supplied to the rear heat exchanger by the drain pan. Therefore, in such a case, it is effective to apply the present invention.

In the floor-standing indoor unit according to the second invention, in the floor-standing indoor unit according to the first invention, the front heat exchanger is provided substantially parallel to the front panel.

  In this floor-standing indoor unit, the resistance of the air flow path formed between the front panel and the front heat exchanger can be reduced as compared with the case where the front heat exchanger is inclined with respect to the front panel.

In the floor-standing indoor unit according to the third invention, in the floor-standing indoor unit according to the first or second invention, the area of the front heat exchanger is larger than the area of the back heat exchanger.

  In this floor-standing indoor unit, air is less likely to flow on the rear heat exchanger side with a relatively small area than on the front heat exchanger side. Therefore, in such a case, it is effective to apply the present invention.

In the floor-standing indoor unit according to the fourth invention, in the floor-standing indoor unit according to any one of the first to third inventions, the front heat exchanger and the back heat exchanger are opposed to each other in the casing. A cross flow fan is provided.

  In this floor-standing indoor unit, air sucked from the suction port by driving the crossflow fan can be supplied to the front heat exchanger and the rear heat exchanger.

In the floor-standing indoor unit according to the fifth invention, in the floor-standing indoor unit according to any one of the first to fourth inventions, at least a part of the filter below the front heat exchanger is curved forward and convex. The guide means for guiding is provided.

  In this floor-standing indoor unit, the filter can be reliably bent by the guide means.

  As described above, according to the present invention, the following effects can be obtained.

In the first aspect of the invention, the area of the filter below the drain pan is increased and the ventilation resistance is reduced compared to the case where the filter is provided in a state where the filter is not curved in the flow path from the suction port to the rear heat exchanger. can do. Therefore, the air sucked from the suction port provided in front of the lower end portion of the casing is likely to flow to the back side through the filter below the drain pan . Therefore, it is possible to suppress a shortage of air supply to the rear heat exchanger and suppress a decrease in heat exchange efficiency of the heat exchanger.

In the 1st invention, since the drain pan is provided, it becomes difficult to supply air to a back surface heat exchanger by a drain pan. Therefore, in such a case, it is effective to apply the present invention.

In 2nd invention, compared with the case where a front heat exchanger inclines with respect to a front panel, resistance of the air flow path formed between the front panel and the front heat exchanger can be made small.

In 3rd invention, compared with the front surface heat exchanger side, air becomes difficult to flow on the back surface heat exchanger side with a comparatively small area. Therefore, in such a case, it is effective to apply the present invention.

In 4th invention, the air suck | inhaled from the suction inlet by the drive of the crossflow fan can be supplied to a front surface heat exchanger and a back surface heat exchanger.

In the fifth invention, the filter can be reliably bent by the guide means.

It is a circuit diagram of an air conditioner provided with a floor-standing indoor unit according to an embodiment of the present invention. It is a perspective view of the floor-standing indoor unit shown in FIG. It is a front view of the floor-standing indoor unit shown in FIG. It is sectional drawing which follows the IV-IV line of the floor-standing indoor unit shown in FIG. It is a figure which shows the state which removed the front grill and the opening-and-closing panel of the floor-standing indoor unit shown in FIG. FIG. 6 is an exploded perspective view of the floor-standing indoor unit and the front grille, side cover, upper filter, lower filter, and open / close panel in the state shown in FIG. 5. It is an enlarged view of the part enclosed with the dashed-dotted line shown in FIG. It is a perspective view of the back surface of the heat insulation cover shown in FIG. It is sectional drawing which follows the IX-IX line of the heat insulation cover shown in FIG. (A) is sectional drawing which follows the XX line of the heat insulation cover shown in FIG. 8, (b) is an enlarged view of the part enclosed with the dashed-dotted line in (a). It is a schematic diagram which shows the state which removed the open / close panel of the floor-standing indoor unit shown in FIG. It is a schematic diagram which shows the main guide provided in the front grille and radiation panel shown in FIG. 11, respectively. It is a figure for demonstrating the procedure which attaches a lower filter to the lower filter guide member shown in FIG.

  Hereinafter, the air conditioner 100 provided with the floor-standing indoor unit 1 according to the embodiment of the present invention will be described.

<Schematic configuration of the air conditioner 100>
As shown in FIG. 1, the air conditioner 100 of the present embodiment includes a floor-standing indoor unit 1 (hereinafter simply referred to as “indoor unit”) installed indoors and an outdoor unit 5 installed outdoors. I have. The indoor unit 1 includes an indoor heat exchanger 22, a cross flow fan 21 disposed in the vicinity of the indoor heat exchanger 22, a radiation panel 30, an indoor electric valve 17, and an indoor temperature for detecting the indoor air temperature. And a sensor 46. The outdoor unit 5 includes a compressor 50, a four-way switching valve 51, an outdoor heat exchanger 52, an outdoor fan 53 disposed in the vicinity of the outdoor heat exchanger 52, and an outdoor electric valve 54. Yes.

  The refrigerant circuit 60 has an annular main flow path 61 to which the indoor heat exchanger 22, the compressor 50, the four-way switching valve 51, the outdoor heat exchanger 52, and the outdoor electric valve 54 are connected. An outdoor heat exchanger temperature sensor 57 is attached to the outdoor heat exchanger 52. Branch portions 60a and 60b are provided on both sides of the indoor heat exchanger 22 in the piping in the indoor unit 1 constituting the main flow path 61, respectively. And the both ends of the bypass piping 62 are connected to the branch parts 60a and 60b. That is, the pipes on both sides of the indoor heat exchanger 22 are connected by the bypass pipe 62. The bypass pipe 62 is provided with the radiation panel 30 and the indoor motor operated valve 17. A panel incoming temperature sensor 27 and a panel outgoing temperature sensor 28 are attached to both sides of the radiation panel 30 in the bypass pipe 62. Further, an accumulator 55 is interposed between the suction side of the compressor 50 and the four-way switching valve 51 in the main flow path 61, and between the discharge side of the compressor 50 and the four-way switching valve 51, A discharge temperature sensor 56 is attached.

  The indoor heat exchanger 22 has a pipe constituting a part of the refrigerant circuit 60, and an indoor heat exchanger temperature sensor 29 is attached. The indoor heat exchanger 22 is disposed on the windward side of the cross flow fan 21. The air heated or cooled by heat exchange with the refrigerant flowing in the indoor heat exchanger 22 is blown out into the room as hot air or cold air by the cross flow fan 21, whereby hot air heating or cooling is performed.

  As will be described in detail later, the radiation panel 30 constitutes a part of the surface of the indoor unit 1 and has a panel pipe 33 (see FIG. 4) that constitutes a part of the refrigerant circuit 60. Radiant heating is performed by the heat of the refrigerant flowing through the panel pipe 33 being radiated indoors. The indoor motor operated valve 17 is provided to adjust the flow rate of the refrigerant supplied to the radiation panel 30.

  As operation modes implemented in the air conditioner 100 of the present embodiment, there are a cooling mode, a warm air heating mode, and a radiant heating mode. The cooling mode is a mode in which cooling is performed by flowing a refrigerant to the indoor heat exchanger 22 without flowing the refrigerant to the radiant panel 30, and the warm air heating mode is an indoor heat exchanger without flowing the refrigerant to the radiating panel 30. 22 is a mode in which a refrigerant is passed through to perform hot air heating. The radiant heating mode is a mode in which radiant heating is performed by flowing a refrigerant through the radiant panel 30 while flowing the refrigerant through the indoor heat exchanger 22 and performing hot air heating.

  In the warm air heating mode, the indoor motor-operated valve 17 is closed, and the four-way switching valve 51 is switched to the state shown by the solid line in FIG. Therefore, as indicated by solid arrows in FIG. 1, the high-temperature and high-pressure refrigerant discharged from the compressor 50 flows into the indoor heat exchanger 22 through the four-way switching valve 51. The refrigerant condensed in the indoor heat exchanger 22 is depressurized by the outdoor electric valve 54 and then flows into the outdoor heat exchanger 52. The refrigerant evaporated in the outdoor heat exchanger 52 flows into the compressor 50 via the four-way switching valve 51 and the accumulator 55.

  In the radiant heating mode, the indoor motor-operated valve 17 is opened, and the four-way switching valve 51 is switched to the state shown by the solid line in FIG. Therefore, as indicated by the dashed arrows in FIG. 1, the high-temperature and high-pressure refrigerant discharged from the compressor 50 flows into the indoor heat exchanger 22 and the radiation panel 30 through the four-way switching valve 51. Then, the refrigerant condensed in the indoor heat exchanger 22 and the radiation panel 30 is decompressed by the outdoor electric valve 54 and then flows into the outdoor heat exchanger 52. The refrigerant evaporated in the outdoor heat exchanger 52 flows into the compressor 50 via the four-way switching valve 51 and the accumulator 55.

<Configuration of indoor unit 1>
Next, the configuration of the indoor unit 1 will be described.
As shown in FIG. 2, the indoor unit 1 has a rectangular parallelepiped shape as a whole, and is installed near the floor surface in the room. In the present embodiment, the indoor unit 1 is attached to the wall surface in a state of floating about 10 cm from the floor surface. In the following description, the direction protruding from the wall to which the indoor unit 1 is attached is referred to as “front”, and the opposite direction is referred to as “rear”. 2 is simply referred to as “left-right direction”, and the up-down direction is simply referred to as “up-down direction”.

  As shown in FIG. 4, the indoor unit 1 includes a casing 10, an internal device such as a cross flow fan 21, an indoor heat exchanger 22, an air outlet unit 25, and an electrical component unit 26 accommodated in the casing 10, and a front surface. A grill 12 is mainly provided. As will be described in detail later, the casing 10 has a main suction port 10a formed in front of the lower end portion thereof, and auxiliary suction ports 10b and 10c formed in the front wall thereof. Further, an air outlet 10 d is formed at the upper end of the casing 10. In the casing 10, a flow path is formed from the main suction port 10a and the auxiliary suction port 10b to the air outlet 10d. In the indoor unit 1, the cross flow fan 21 is driven to suck air from the auxiliary suction ports 10 b and 10 c while sucking air in the vicinity of the floor surface from the main suction port 10 a. Then, in the indoor heat exchanger 22, the sucked air is heated or cooled to harmonize, and the conditioned air is blown out from the outlet 10d and returned to the room.

  The casing 10 includes a main body frame 11, an outlet cover 41, a radiation panel 30, an open / close panel (open / close member) 42, and a side panel 15 (see FIG. 6). As will be described later, the air outlet cover 41 has a front panel portion 41a, and the radiation panel 30 has a front panel portion 31. The front panel portion 41 a of the blower outlet cover 41, the front panel portion 31 of the radiation panel 30, and the open / close panel 42 are arranged so as to be flush with each other on the front surface of the casing 10, thereby constituting the front panel 4. As shown in FIG. 2, a power button 18 and a light-emitting display unit 19 that indicates an operation state are provided at the upper right end portion of the front panel 4, that is, the right end portion of the front panel portion 41 a of the outlet cover 41. .

  The main body frame 11 is attached to a wall surface and supports the various internal devices described above. The front grill 12, the blower outlet cover 41, the radiation panel 30, and the open / close panel 42 are attached to the front surface of the main body frame 11 in a state of supporting internal devices. The blower outlet cover 41 is attached to the upper end part of the main body frame 11, and the blower outlet 10d which is a rectangular opening long in the left-right direction is formed in the upper wall. The radiation panel 30 is attached to the lower side of the outlet cover 41, and the open / close panel 42 is attached to the lower side of the radiation panel 30. Between the lower front end of the main body frame 11 and the lower end of the open / close panel 42 is a main suction port 10a which is an opening that is long in the left-right direction. In addition, as shown in FIG. 4, the main suction inlet 10a is provided in the front side rather than the front-back direction center position (position shown by the arrow) in the lower end part of the casing 10. As shown in FIG.

Here, each internal apparatus accommodated in the casing 10 will be described.
The cross flow fan 21 is arranged so that the axial direction thereof is along the left-right direction slightly above the central portion in the height direction of the casing 10. The cross flow fan 21 sucks air from the lower front and blows it upward and rearward.

  The indoor heat exchanger 22 is disposed substantially in parallel with the front panel 4, and faces upward as the front heat exchanger 22a faces the back of the front panel 4 and the lower end of the front heat exchanger 22a approaches the back. It is comprised with the back surface heat exchanger 22b which inclines. The front heat exchanger 22 a is disposed in front of the cross flow fan 21, and its upper half faces the cross flow fan 21. As shown in FIG. 4, the upper end of the front heat exchanger 22 a is located above the upper end of the cross flow fan 21. The rear heat exchanger 22 b is disposed below the cross flow fan 21. That is, the indoor heat exchanger 22 has a substantially V shape as a whole, and is disposed to face the cross flow fan 21 so as to surround the front and the lower side of the cross flow fan 21.

  As shown in FIG. 4, the extension length L1 of the front heat exchanger 22a extending in the vertical direction is a rear heat exchanger extending obliquely from the vicinity of the lower end of the front heat exchanger 22a toward the back. It is longer than the extended length L2 of 22b. Moreover, the length along the left-right direction in the front view of the front surface heat exchanger 22a and the back surface heat exchanger 22b is substantially the same. Accordingly, the area of the portion of the front heat exchanger 22a to which air from the main suction port 10a is supplied, that is, the area of the front surface of the front heat exchanger 22a is the main suction port 10a of the rear heat exchanger 22b. Is larger than the area of the portion to which the air from the air is supplied, that is, the area of the surface of the rear heat exchanger 22b facing diagonally downward.

  A pipe for supplying the refrigerant sent from the outdoor unit 5 to the indoor heat exchanger 22 and the radiation panel 30 is disposed on the right side of the indoor heat exchanger 22 in a front view. More specifically, in FIG. 1, pipes extending from the branch part 60 a to the indoor heat exchanger 22 and the radiant panel 30, and pipes extending from the indoor heat exchanger 22 and the radiant panel 30 to the branch part 60 b, respectively, It is arranged on the right side of the exchanger 22. As shown in FIG. 5, a drip-proof cover 23 is attached in front of these pipes.

  In the vicinity of the lower end of the indoor heat exchanger 22, a drain pan 24 extending in the left-right direction is disposed. As shown in FIG. 5, when viewed from the front, the left end of the drain pan 24 is located substantially opposite to the end of the indoor heat exchanger 22, and the right end is located on the right side of the indoor heat exchanger 22. It is in a position facing the arranged pipe. Further, as shown in FIG. 4, the end portion in the front-rear direction of the drain pan 24 is at a position substantially opposite to the end portion in the front-rear direction of the indoor heat exchanger 22. As shown in FIG. 4, the air sucked from the main suction port 10a is divided into a front side and a rear side below the drain pan 24, and is supplied to the front heat exchanger 22a and the rear heat exchanger 22b, respectively.

  The air outlet unit 25 is disposed above the cross flow fan 21 and guides the air blown from the cross flow fan 21 to the air outlet 10 d formed at the upper end of the casing 10. The blower outlet unit 25 includes a horizontal flap 25a disposed in the vicinity of the blower outlet 10d. The horizontal flap 25a changes the direction of the airflow in the vertical direction of the airflow blown from the air outlet 10d, and opens and closes the air outlet 10d.

  As shown in FIG. 5, the electrical component unit 26 is disposed below the drain pan 24, and includes an electrical component box 26a that accommodates a circuit board (not shown) and the like, and a substrate accommodated in the electrical component box 26a. And a terminal block 26b to be electrically connected. The electrical component box 26 a is disposed at a position substantially opposite to the right half of the indoor heat exchanger 22, and the terminal block 26 b is disposed at a position facing the pipe disposed on the right side of the indoor heat exchanger 22. Yes. Further, the wiring drawn out from the electrical component unit 26 is routed straight upward from the right side of the terminal block 26b, and the power button 18 provided on the upper right end of the front panel 4 and the LED light emitter of the light emitting display unit 19 are provided. It is connected.

  As shown in FIG. 6, the front grill 12 is attached to the main body frame 11 in a state where the above-described various internal devices, the outlet cover 41, and the radiation panel 30 are attached. As shown in FIG. 4, the front grill 12 is disposed so as to cover from the substantially vertical central portion of the front heat exchanger 22 a to the lower end of the main body frame 11. At the lower end portion of the front grill 12, a suction port grill 14 disposed in the main suction port 10 a is provided. Further, as will be described in detail later, the upper filter 16a and the lower filter 16b are provided on the portion of the front grill 12 covering the main body frame 11 in cooperation with the main guide 72 provided on the rear surface of the radiation panel 30. Main guides 71, 72 and the like for guiding are provided. As shown in FIG. 6, side panels 15 constituting a part of the side surface of the casing 10 are attached to the left and right sides of the front grill 12.

  Here, as shown in FIG. 6, in the indoor unit 1 of this embodiment, two upper filters 16a arranged side by side and two lower filters arranged below each upper filter 16a. A total of four filters, 16b, are attached. The length L3 along the vertical direction of the upper filter 16a is shorter than the length L4 along the vertical direction of the lower filter 16b, and the width (length along the horizontal direction) of the upper filter 16a is substantially equal to the width of the lower filter 16b. The same. That is, the area of the upper filter 16a is smaller than the area of the lower filter 16b.

  Here, as shown in FIG. 6, in the indoor unit 1 of this embodiment, two upper filters 16a arranged side by side and two lower filters arranged below each upper filter 16a. A total of four filters, 16b, are attached. The length L1 along the vertical direction of the upper filter 16a is shorter than the length L2 along the vertical direction of the lower filter 16b, and the width (length along the left-right direction) of the upper filter 16a is substantially equal to the width of the lower filter 16b. The same. That is, the area of the upper filter 16a is smaller than the area of the lower filter 16b.

  As shown in FIG. 4, the upper filter 16a and the lower filter 16b are arranged between the front heat exchanger 22a and the front panel 4, that is, from the main suction port 10a and the auxiliary suction ports 10b and 10c to the front heat exchanger 22a. It is provided in the flow path to reach. The upper filter 16a is attached to the upper filter attachment region (region indicated by A) in FIG. 4 and extends in the vertical direction, and the lower end thereof is substantially the center in the vertical direction of the front heat exchanger 22a. Opposite. The lower filter 16b is attached to the lower filter attachment region (region indicated by B) in FIG. 4 and is provided downward from the vicinity of the lower end of the upper filter 16a, and its lower half is convex forward. It is curved. More specifically, the lower filter 16b is curved at a portion below the drain pan 24 disposed in the vicinity of the lower end portion of the indoor heat exchanger 22. The lower end of the lower filter 16b is located in the vicinity of the rear edge of the main suction port 10a.

  In FIG. 11, the upper filter mounting area of the upper filter 16a arranged on the left corresponds to the area indicated by hatching. The lower filter mounting area of the lower filter 16b arranged on the left corresponds to the area indicated by dot hatching. As shown in FIG. 11, most of the upper filter mounting region on the upper end side (the region excluding the lower end portion, the region indicated by a <b> 1 in FIG. 11) is covered with the radiation panel 30. In addition, the radiation panel 30 respond | corresponds to the outer peripheral part of this invention. The lower end of the upper filter mounting region (the region indicated by a2 in FIG. 11) and the lower filter mounting region are in a region facing the open / close panel 42. Therefore, as shown in FIG. 11, when the open / close panel 42 is removed, the lower end portion of the upper filter mounting region and the lower filter mounting region are exposed.

  The upper filter 16a is inserted upward from an area indicated by a2 provided at the lower end of the mounting area. The lower filter 16b is inserted downward from the upper end of the mounting area.

  As shown in FIGS. 6 and 11, the front grill 12 includes a main guide 71 that constitutes a part of the upper filter guide member 70 that guides the upper filter 16a, and a lower filter guide member 80 that guides the lower filter 16b. A main guide 81 and an auxiliary guide 82 are provided. The main guides 71 and 81 are provided on the back side of the wall surface 13 provided on the left and right sides of the upper filter mounting region and the lower filter mounting region, and the auxiliary guide 82 is provided on the front side of the wall surface 13. The main guides 71 and 81 and the auxiliary guide 82 are all formed so as to protrude from the wall surface 13 toward the upper filter mounting region or the lower filter mounting region. Details of the main guides 71 and 81 and the auxiliary guide 82 will be described later.

  As shown in FIG. 4, the air outlet cover 41 covers the air outlet unit 25. As described above, the air outlet 10 d is formed on the upper wall of the air outlet cover 41. Further, a front panel portion 41 a is provided on the front surface of the outlet cover 41. The front panel portion 41a has a rectangular shape that is long in the left-right direction. Here, as shown in FIG. 3, the length of the front panel portion 41 a in the vertical direction is L.

  The radiation panel 30 has a substantially rectangular shape that is long on the left and right, and is provided above the center in the height direction of the casing 10. As shown in FIG. 4, the radiation panel 30 contacts the front panel 31 made of aluminum, the heat insulating cover 32 made of resin so as to cover the back of the front panel 31, and the back of the front panel 31. It is mainly comprised with the panel piping 33 attached so that. The panel piping 33 is a part of piping that constitutes the refrigerant circuit 60. The refrigerant sent from the outdoor unit 5 flows into the panel pipe 33 and flows from the right end to the left end in the front view on the back surface of the front panel portion 31. Then, it is folded and flows from the left end to the right end, and flows out of the panel pipe 33 from the right end.

  The length of the front panel portion 31 in the vertical direction is almost twice that of the front panel portion 41 a of the outlet cover 41. That is, as shown in FIG. 3, the length of the front panel portion 31 in the vertical direction is about 2L. The front panel unit 31 is located below the front panel unit 41 a of the outlet cover 41. As shown in FIG. 4, the substantially central portion of the radiant panel 30 in the vertical direction faces the upper end of the front heat exchanger 22a.

  As shown in FIGS. 8 and 10, a main guide 72 and an auxiliary guide 73 that constitute a part of the upper filter guide member 70 that guides the upper filter 16 a are provided on the back surface of the heat insulating cover 32. In FIG. 11, the main guide 72 is indicated by a broken line. As shown in FIG. 11, the main guide 72 is positioned above the main guide 71 provided on the front grill 12. The main guide 72 is provided on the back side of the wall surface 34 provided on the left and right of the upper filter mounting region, and the auxiliary guide 73 is provided on the front side of the wall surface 34. The main guide 72 and the auxiliary guide 73 are both formed so as to protrude from the wall surface 34 toward the upper filter mounting region. Details of the main guide 72 and the auxiliary guide 73 will be described later.

  The open / close panel 42 is provided below the front panel portion 31 of the radiation panel 30 so as to be openable and closable. The open / close panel 42 has a rectangular shape that is long in the left-right direction, and the length in the vertical direction is approximately four times that of the front panel portion 41 a of the outlet cover 41. That is, as shown in FIG. 3, the length of the open / close panel 42 in the vertical direction is about 4L. As shown in FIG. 4, the vertical position of the upper end of the open / close panel 42 is substantially the same as the upper end of the front grill 12. As described above, the lower end of the open / close panel 42 constitutes a part of the main suction port 10a. Therefore, by removing the open / close panel 42 as described above, the lower end portion (region a2) of the upper filter mounting region provided in the front grill 12 and the lower filter mounting region (region B) are exposed, and the upper filter 16a and the lower filter 16b can be attached and detached, and the filter can be inserted.

  As described above, the front panel 4 includes the front panel part 41 a provided on the outlet cover 41, the front panel part 31 provided on the radiation panel 30, and the open / close panel 42. And between the front panel part 31 of the radiation panel 30 and the opening / closing panel 42, the auxiliary | assistant suction inlet 10b which is a slit-shaped opening extended in the left-right direction (horizontal direction) is formed. Further, an auxiliary suction port 10c which is a slit-like opening extending in the left-right direction is also formed near the upper end of the open / close panel 42. As shown in FIG. 3, the distance in the vertical direction between the upper end of the open / close panel 42 and the auxiliary suction port 10 c is L.

  That is, the vertical length of the front panel 4 is 7L, the auxiliary suction port 10b is formed at a position 3L from the upper end of the front panel 4, and the auxiliary suction port 10c is formed at a position 3L from the lower end of the front panel 4. Has been. That is, the auxiliary suction ports 10 b and 10 c are provided in the central region of the front panel 4 in the vertical direction (height direction). Moreover, as shown in FIG. 4, the auxiliary suction ports 10b and 10c are opposed to the front heat exchanger 22a.

<Upper filter guide member 70 and lower filter guide member 80>
The upper filter guide member 70 is provided in each of the upper filter mounting regions of the two upper filters 16a arranged side by side and guides the upper filter 16a. As described above, the upper filter guide member 70 includes the main guide 71 provided on the front grill 12, the wall surface 13 which is a part of the front grill 12, the main guide 72 and the auxiliary guide 73 provided on the radiation panel 30. And a wall surface 34 which is a part of the radiation panel 30. The main guides 71 and 72 correspond to the first guide portion of the present invention.

  The main guide 71 is formed at the upper end of the front grill 12 and is substantially parallel to the filter surface of the upper filter 16 a guided by the upper filter guide member 70. The main guide 71 guides both the left and right ends of the upper filter 16a, particularly when the upper filter 16a starts to be inserted. That is, the main guide 71 corresponds to the insertion start portion of the first guide member. More specifically, the main guide 71 is in contact with the rear surfaces of the left and right ends of the upper filter 16a and regulates the insertion direction of the upper filter 16a together with the wall surface 13 of the front grill 12.

  The main guide 72 guides both left and right ends of the upper filter 16a above the main guide 71 (on the downstream side of the main guide 71 with respect to the insertion direction of the upper filter 16a). It is almost parallel. More specifically, the main guide 72 is in contact with the rear surfaces of the left and right ends of the upper filter 16a, and regulates the insertion direction of the upper filter 16a together with the wall surface 34 of the radiation panel 30.

  The auxiliary guide 73 is formed in front of the main guide 72. As shown in FIGS. 8 and 9, the upper half of the auxiliary guide 73 extends in the vertical direction, and the lower half of the auxiliary guide 73 is inclined forward. As a result, the upper filter 16 a attached to the upper filter guide member 70 is sandwiched between the main guide 72 and the auxiliary guide 73 at the left and right ends of the upper end portion thereof. Note that the lower end of the auxiliary guide 73 coincides with the lower front end of the heat insulating cover 32. Therefore, when inserting the upper filter 16a from the lower side to the upper side of the radiation panel 30, it is possible to prevent the upper filter 16a from being removed from the insertion path. That is, even if the upper filter 16a is inserted in a state of being lifted from the main guide 72 without being brought into contact with the main guide 72, the auxiliary guide 73 extending to the lower front end of the heat insulating cover 32 is moved forward of the auxiliary guide 73. The upper filter 16a does not enter this area.

  The lower filter guide member 80 is provided in each of the upper filter mounting regions of the two lower filters 16b arranged side by side, and guides the lower filter 16b. As described above, the lower filter guide member 80 includes the main guide 81 and the auxiliary guide 82 provided on the front grill 12 and the wall surface 13 which is a part of the front grill 12.

  The main guide 81 extends from the lower end portion of the front grill 12 to the lower end of the main guide 71, and is provided substantially parallel to the filter surface of the lower filter 16 b guided by the lower filter guide member 80. And it contacts the back of the both left and right ends of the lower filter 16b, and restricts the insertion direction of the lower filter 16b together with the wall surface 13 of the front grill 12. That is, the main guide 81 corresponds to the second guide means of the present invention. The upper half of the main guide 81 extends along the vertical direction, and the lower half of the main guide 81 is convexly curved forward. As shown in FIG. 7, the auxiliary guide 82 is provided in front of the curved portion of the main guide 81. As a result, the lower filter 16b attached to the lower filter guide member 80 is in a state in which the left and right end portions of the lower half are sandwiched between the main guide 81 and the auxiliary guide 82 and curved forward.

  Here, the guide widths of the upper filter guide member 70 and the lower filter guide member 80 will be described with reference to FIG. The guide width is the total width of portions of the upper filter guide member 70 or the lower filter guide member 80 that are substantially parallel to the filter surface and guide the left and right ends of the upper filter 16a or the lower filter 16b. That is, the guide width of the insertion start portion (region a2) of the upper filter guide member 70 is in contact with the back surface of the upper filter 16a at the left and right end portions of the upper filter mounting region, respectively, and regulates the filter insertion direction. Is the total width. Further, the guide width of the portion (region a1) downstream of the insertion start portion of the upper filter guide member 70 in the filter insertion direction is in contact with the back surface of the upper filter 16a at the left and right ends of the upper filter mounting region. This is the total width of the main guide 72 that regulates the insertion direction. Furthermore, the guide width of the lower filter guide member 80 (that is, the guide width of the region B that is the lower filter mounting region) is in contact with the back surface of the lower filter 16b at both the left and right ends of the lower filter mounting region. This is the total width of the main guide 81 that regulates the direction.

  As shown in FIG. 12, the width of the main guide 71 located at the left end of the upper filter mounting region (region A) is W1. In the present embodiment, the widths of the main guides 71 provided at the left and right ends of the upper filter mounting region are equal. Therefore, the guide width of the insertion start portion (region a2) of the upper filter guide member 70 is 2 × W1. The width of the main guide 72 located at the left end of the upper filter mounting area (area A) and the width of the main guide 81 located at the left end of the lower filter mounting area (area B) are both substantially Equally, W2. As with the main guide 71, the width of the main guide 72 provided at each of the left and right ends of the region A and the width of the main guide 81 provided at each of the left and right ends of the region B are equal. Accordingly, the guide width of the portion (region a1) downstream of the insertion start portion of the upper filter guide member 70 in the filter insertion direction and the guide width of the lower filter mounting region (region B) are 2 × W2. The guide width (2 × W1) in the region a2 that is the insertion start portion of the upper filter guide member 70 is the region a1 that is downstream of the insertion start portion of the upper filter guide member 70 in the insertion direction and the region that is the lower filter mounting region It is larger than the guide width (2 × W2) in B.

  Further, the width W2 of the main guides 72 and 81 is substantially the same as the widths of the left and right ends of the upper filter 16a and the lower filter 16b. Further, the widths of the auxiliary guides 73 and 82 arranged at positions facing the main guides 72 and 81 are substantially the same as the width W2 of the main guides 72 and 81, respectively. Therefore, when the upper filter 16a and the lower filter 16b are mounted on the upper filter guide member 70 and the lower filter guide member 80, the ventilation resistance is increased by the main guides 72 and 81 and the auxiliary guides 73 and 82, and the upper filter 16a and It is possible to prevent the range in which dust can be removed in the lower filter 16b from becoming narrow.

<Installation procedure of lower filter 16b>
Next, a procedure for mounting the lower filter 16b will be described with further reference to FIG.
First, as shown in FIG. 11, the open / close panel 42 is removed so that a filter can be inserted. Thereby, the region B which is the mounting region of the lower filter 16b is exposed. Then, as shown in FIG. 13A, the back surfaces of the left and right ends of the lower end portion of the upper filter 16 a are brought into contact with the upper end portion of the main guide 81 of the lower filter guide member 80. At this time, the insertion direction of the lower filter 16 b is regulated by the main guide 81 and the wall surface 13 of the front grill 12.

  Subsequently, the lower filter 16b whose insertion direction is restricted as described above is inserted along the insertion direction (downward). Then, as shown in FIG. 13B, when the lower end of the lower filter 16b reaches a position facing the auxiliary guide 82, the left and right ends of the lower filter 16b are sandwiched between the main guide 81 and the auxiliary guide 82, It is bent so as to be convex forward. Thereafter, as shown in FIG. 13C, the lower filter 16b is inserted until the entire lower filter 16b is within the region B which is the filter mounting region. At this time, the lower half of the lower filter 16b is curved convexly forward.

<Characteristics of indoor unit 1 of this embodiment>
The indoor unit 1 of the present embodiment includes an upper filter 16a and a lower filter provided in a flow path from a main suction port 10a provided in front of the lower end portion of the casing 10 to the front heat exchanger 22a of the indoor heat exchanger 22. 16b. And as for the lower filter 16b, at least one part below the front heat exchanger 22a is curving convexly ahead.
Therefore, compared with the case where the lower filter 16b is not curved, the area of the upper filter 16a below the front heat exchanger 22a can be increased, and the ventilation resistance can be reduced. Therefore, the air sucked from the main suction port 10a provided in front of the lower end portion of the casing 10 easily flows to the back side through the upper filter 16a below the front heat exchanger 22a. Thereby, insufficient supply of air to the back surface heat exchanger 22b can be suppressed, and a decrease in heat exchange efficiency of the indoor heat exchanger 22 can be suppressed.

  Further, the indoor unit 1 of the present embodiment includes a drain pan 24 provided below the indoor heat exchanger 22. When the drain pan 24 is provided, it becomes difficult for the drain pan 24 to supply air to the rear heat exchanger 22b. Therefore, in such a case, it is effective to apply the present invention.

  Further, in the indoor unit 1 of the present embodiment, the front heat exchanger 22a is provided substantially parallel to the front panel 4. Therefore, compared to the case where the front heat exchanger 22a is inclined with respect to the front panel 4, the resistance of the air flow path formed between the front panel 4 and the front heat exchanger 22a can be reduced.

  Furthermore, in the indoor unit 1 of the present embodiment, the area of the front heat exchanger 22a is larger than the area of the rear heat exchanger 22b. On the side of the rear heat exchanger 22b having a relatively small area, air hardly flows compared to the side of the front heat exchanger 22a. Therefore, in such a case, it is effective to apply the present invention.

  In addition, the indoor unit 1 of the present embodiment includes a cross flow fan 21 provided in the casing 10 so as to face the front heat exchanger 22a and the rear heat exchanger 22b. Therefore, the air sucked from the main suction port 10a by the driving of the cross flow fan 21 can be supplied to the front heat exchanger 22a and the rear heat exchanger 22b.

  Moreover, the indoor unit 1 of this embodiment is provided with the main guide 81 and the auxiliary guide 82 which guide the part below the front heat exchanger 22a of the lower filter 16b so that it may curve convexly forward. Therefore, the lower filter 16b can be reliably bent by the main guide 81 and the auxiliary guide 82.

  As mentioned above, although embodiment of this invention was described based on drawing, it should be thought that a specific structure is not limited to these embodiment. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the above-described embodiment, the case where the lower portion of the drain pan 24 in the lower filter 16b is convexly curved forward is described. However, the curved portion in the lower filter 16b is not limited to this, and the front surface It suffices that at least a portion below the heat exchanger 22a is convexly curved forward.

  In the above-described embodiment, the main suction port 10 a is formed between the lower front end of the main body frame 11 and the lower end of the front panel 4, and more forward than the center position in the front-rear direction at the lower end of the casing 10. Although the case where it was provided was demonstrated, it is not limited to this. Even if the main suction port 10a is formed across the center position in the front-rear direction of the lower end portion of the casing 10, the portion formed on the front side of the center position is larger than the portion formed on the back side. That's fine. Further, the main suction port 10 a may be provided in the front panel 4 or may be provided across the front panel 4 and the lower wall of the casing 10.

  Furthermore, although the case where the front heat exchanger 22a is provided substantially parallel to the front panel 4 has been described in the above-described embodiment, the front heat exchanger 22a may be inclined with respect to the front panel 4. Good.

  In addition, in the above-described embodiment, the case where the area of the front heat exchanger 22a is larger than the area of the rear heat exchanger 22b has been described, but the area of the front heat exchanger 22a is the area of the rear heat exchanger 22b. Or may be smaller than the area of the back heat exchanger 22b.

  Furthermore, although the above-mentioned embodiment demonstrated the case where the crossflow fan 21 provided so as to oppose the front surface heat exchanger 22a and the back surface heat exchanger 22b was provided, it is not limited to this. That is, a turbo fan or the like may be used instead of the cross flow fan 21.

  Moreover, although the above-mentioned embodiment demonstrated the case where the lower guide 16b was provided with the main guide 81 and the auxiliary guide 82 which guide the part below the front surface heat exchanger 22a so that it may curve ahead convexly, This is not a limitation. That is, for example, when the lower filter 16b is formed in a curved shape, there may be no guide for bending the lower filter 16b.

  In addition, in the above-described embodiment, the floor-standing indoor unit 1 that is attached to the wall surface in a state of being about 10 cm above the floor surface has been described, but the present invention is not limited to this. The present invention is applicable to all floor-standing indoor units installed near the floor surface. Therefore, you may apply to the floor-standing indoor unit installed in a floor surface.

  If this invention is utilized, the fall of heat exchange efficiency can be prevented.

DESCRIPTION OF SYMBOLS 1 Indoor unit 4 Front panel 10 Casing 10a Main inlet 10d Outlet 16a Upper filter 16b Lower filter 21 Cross flow fan 22 Indoor heat exchanger 22a Front heat exchanger 22b Rear heat exchanger 24 Drain pan 81 Main guide (guide means)
82 Auxiliary guide (guide means)

Claims (5)

A casing having a front panel and containing a heat exchanger;
A suction port that is provided in front of the lower end of the casing and sucks air in the vicinity of the floor surface;
A blower outlet provided at the upper end of the casing for blowing out air;
A filter provided in a flow path from the suction port to the heat exchanger in the casing ;
A drain pan provided below the heat exchanger ,
The heat exchanger is
A front heat exchanger disposed to face the back of the front panel;
A rear heat exchanger that inclines upward as it approaches the back surface from near the lower end of the front heat exchanger,
While the air sucked from the suction port flows to the front heat exchanger,
A part of the air flowing to the front heat exchanger is divided below the drain pan and is supplied to the back heat exchanger;
The length of the drain pan in the front-rear direction is substantially the same as the length of the heat exchanger in the front-rear direction, and the rear end of the drain pan is disposed on the back side from the rear end of the suction port,
The filter is inserted between the front panel and the front heat exchanger, and a lower end portion thereof is disposed in the vicinity of a rear end edge of the suction port ,
A floor-standing indoor unit characterized in that at least a part of the filter below the drain pan is convexly curved forward. The floor-standing indoor unit according to claim 1 , wherein the front heat exchanger is provided substantially parallel to the front panel. The floor-standing indoor unit according to claim 1 or 2 , wherein an area of the front heat exchanger is larger than an area of the rear heat exchanger. The floor-standing indoor unit according to any one of claims 1 to 3 , further comprising a cross-flow fan provided so as to face the front heat exchanger and the rear heat exchanger in the casing. . The floor-standing room according to any one of claims 1 to 4 , further comprising guide means for guiding at least a part of the filter below the front heat exchanger so as to be convexly curved forward. Machine.

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