JP2012083038A - Floor type indoor unit of air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an indoor unit in which air sucked through an auxiliary suction port can be supplied to the vicinity of an upper end of a heat exchanger, and thereby, decrease in heat exchange efficiency can be suppressed.SOLUTION: A casing 10 housing a cross-flow fan 21 and an indoor heat exchanger 22 includes a main suction port 10a which is disposed in a lower end of the casing, for sucking air near the floor, and an air outlet 10d which is disposed in an upper end of the casing, for blowing air. Further, the casing 10 has auxiliary suction ports 10b, 10c which are disposed between the main suction port 10a and the air outlet port 10d and formed in a front panel 34 that faces a front heat exchanger 22a of the indoor heat exchanger 22.

Description

  The present invention relates to a floor-standing indoor unit of an air conditioner that sucks air in the vicinity of a floor surface from a lower end portion of a casing and blows out air from the upper end portion of the casing.

  As a conventional floor-standing indoor unit of an air conditioner, a turbo fan is used, and air is sucked from four suction ports provided in the upper and lower portions and both side surfaces of the front panel of the casing, and above the front panel and What blows off from the blower outlet each provided below is known (for example, refer patent document 1). In such a floor-standing indoor unit, the turbofan sucks air from four suction ports provided in four directions, and supplies air to a heat exchanger disposed between the front panel and the turbofan. Air is blown out from the upper and lower outlets.

JP 2010-78274 A

  Here, as a configuration of the floor-standing indoor unit, in addition to the configuration as described above, the air is sucked from the suction port provided at the lower end portion of the casing and blown out from the air outlet provided at the upper end portion of the casing. Is also possible. In such a configuration, when a turbo fan is used, noise is increased because the outlet is smaller than the casing. Therefore, it is preferable to use a cross flow fan instead of the turbo fan.

  In the case of such a configuration, the air sucked from the suction port flows upward from below through a gap formed between the heat exchanger and the front panel arranged substantially in parallel with the front panel. The gap between the front panel and the heat exchanger is designed to be relatively narrow from the viewpoint of downsizing the floor-standing indoor unit, and the flow path resistance in the gap is large. Therefore, the air sucked from the suction port cannot be supplied to the vicinity of the upper end portion of the heat exchanger, resulting in a problem that the heat exchange efficiency is lowered.

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

  A floor-standing indoor unit for an air conditioner according to a first aspect of the present invention includes a casing having a front panel, a cross flow fan accommodated in the casing, and a portion facing the back surface of the front panel in the casing. A heat exchanger, and the casing is provided at a lower end portion of the casing and has a main suction port for sucking air in the vicinity of the floor surface, and a blower outlet provided at the upper end portion of the casing and for blowing out air. In addition, the front panel has an auxiliary inlet provided between the main inlet and the outlet.

  The phrase “provided at the upper end of the casing” includes not only the case of being provided on the upper wall of the casing but also the case of being provided near the upper end of the front panel. Similarly, “provided at the lower end of the casing” includes not only the case of being provided on the lower wall of the casing but also the case of being provided near the lower end of the front panel.

  This floor-standing indoor unit has an auxiliary suction port formed in the front panel in addition to the main suction port provided at the lower end of the casing. The air sucked from the main suction port flows through the gap between the front panel and the heat exchanger from the bottom to the top, and is then supplied to the heat exchanger. Since the auxiliary suction port is located above the main suction port, the air sucked from the auxiliary suction port and the air flowing through the gap between the front panel and the heat exchanger is more than the air sucked from the main suction port. Also reaches up. Therefore, the air sucked from the auxiliary suction port can be supplied to the vicinity of the upper end of the heat exchanger. Therefore, a decrease in heat exchange efficiency can be suppressed.

  In the floor-standing indoor unit of the air conditioner according to the second invention, in the floor-standing indoor unit according to the first invention, the auxiliary suction port is a slit-like opening extending along the horizontal direction.

  In this floor-standing indoor unit, the air sucked from the auxiliary suction port can be supplied over the entire width of the heat exchanger. Therefore, a decrease in heat exchange efficiency can be reliably suppressed.

  In the floor-standing indoor unit of the air conditioner according to the third aspect of the invention, in the floor-standing indoor unit according to the first or second aspect of the invention, the auxiliary suction port is provided in a central region in the height direction of the front panel. ing.

  In this floor-standing indoor unit, the air sucked from the auxiliary suction port is easily supplied near the upper end of the heat exchanger.

  In the floor-standing indoor unit of the air conditioner according to the fourth invention, in the floor-standing indoor unit according to any one of the first to third inventions, the auxiliary suction port is provided at a position facing the heat exchanger. It has been.

  In this floor-standing indoor unit, the air sucked from the auxiliary suction port is easily supplied to the heat exchanger.

  In the floor-standing indoor unit of the air conditioner according to the fifth aspect of the present invention, in the floor-standing indoor unit according to any one of the first to fourth aspects of the invention, the front panel is provided above the auxiliary suction port, and the refrigerant A radiation panel having a part of piping constituting the circuit is included.

  In this floor-standing indoor unit, since the radiation panel is provided above the auxiliary suction port, air heated by the heat radiated from the radiation panel can be suppressed from being sucked from the auxiliary suction port.

  In the floor-standing indoor unit of the air conditioner according to the sixth invention, in the floor-standing indoor unit according to any one of the first to fifth inventions, the heat exchanger is disposed substantially parallel to the front panel. A front heat exchanger, and a rear heat exchanger that inclines upward from the vicinity of the lower end of the front heat exchanger toward the back surface.

  In this floor-standing indoor unit, the heat exchanger is composed of a front heat exchanger and a rear heat exchanger, so when the entire heat exchanger is formed in a plate shape and placed almost parallel to the front panel In comparison, the height of the heat exchanger disposed substantially parallel to the front panel can be shortened. Therefore, it can reduce in size in the height direction of the casing. Moreover, since the height of the heat exchanger can be shortened, the air sucked from the main suction port is easily supplied to the vicinity of the upper end of the heat exchanger. That is, in order to supply the air sucked from the main suction port to the vicinity of the upper end of the front heat exchanger, there is no need to increase the gap between the front panel and the front heat exchanger. Can also be miniaturized.

  In the floor-standing indoor unit of the air conditioner according to the seventh invention, in the floor-standing indoor unit according to any one of the first to seventh inventions, as the front panel approaches the back from the lower end of the auxiliary suction port. It has a protruding portion that is inclined upward.

  In this floor-standing indoor unit, air sucked from the auxiliary suction port can flow upward, so that the air is easily supplied to the vicinity of the upper end of the heat exchanger. In addition, it is difficult to see the inside of the casing from the outside.

  The floor-standing indoor unit for an air conditioner according to an eighth aspect of the invention is the floor-standing indoor unit according to the seventh aspect of the invention, comprising a drain pan provided below the heat exchanger, wherein the protruding portion is more than the drain pan. It is not provided below.

  In this floor-standing indoor unit, the flow path through which the air sucked from the main suction port passes in the vicinity of the main suction port can be prevented from being narrowed by the protruding portion.

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

  In 1st invention, in addition to the main suction port provided in the lower end part of the casing, it has the auxiliary suction port formed in the front panel. The air sucked from the main suction port flows through the gap between the front panel and the heat exchanger from the bottom to the top, and is then supplied to the heat exchanger. Since the auxiliary suction port is located above the main suction port, the air sucked from the auxiliary suction port and the air flowing through the gap between the front panel and the heat exchanger is more than the air sucked from the main suction port. Also reaches up. Therefore, the air sucked from the auxiliary suction port can be supplied to the vicinity of the upper end of the heat exchanger. Therefore, a decrease in heat exchange efficiency can be suppressed.

  In the second invention, the air sucked from the auxiliary suction port can be supplied over the entire width of the heat exchanger. Therefore, a decrease in heat exchange efficiency can be reliably suppressed.

  In 3rd invention, it becomes easy to supply the air suck | inhaled from the auxiliary | assistant inlet to the upper end vicinity of the heat exchanger.

  In the fourth invention, air sucked from the auxiliary suction port is easily supplied to the heat exchanger.

  In the fifth invention, since the radiation panel is provided above the auxiliary suction port, the air heated by the heat radiated from the radiation panel can be suppressed from being sucked from the auxiliary suction port.

  In the sixth aspect of the invention, the heat exchanger is composed of a front heat exchanger and a back heat exchanger, so that the entire heat exchanger is formed in a plate shape and is arranged substantially parallel to the front panel. Thus, the height of the heat exchanger arranged substantially parallel to the front panel can be shortened. Therefore, it can reduce in size in the height direction of the casing. Moreover, since the height of the heat exchanger can be shortened, the air sucked from the main suction port is easily supplied to the vicinity of the upper end of the heat exchanger. That is, in order to supply the air sucked from the main suction port to the vicinity of the upper end of the front heat exchanger, there is no need to increase the gap between the front panel and the front heat exchanger. Can also be downsized.

  In the seventh aspect of the invention, the air sucked from the auxiliary suction port can flow upward, so that the air is easily supplied near the upper end of the heat exchanger. In addition, it is difficult to see the inside of the casing from the outside.

  In the eighth invention, the passage through which the air sucked from the main suction port passes in the vicinity of the main suction port can be prevented from being narrowed by the protruding portion.

It is a circuit diagram of the air conditioner provided with the floor-standing indoor unit concerning the 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 panel and opening / closing panel of the floor-standing indoor unit shown in FIG.

Hereinafter, a floor-standing indoor unit (hereinafter simply referred to as “indoor unit”) 1 of the air conditioner 100 according to the embodiment of the present invention will be described.
As shown in FIG. 1, the indoor unit 1 according to the present embodiment is connected to the outdoor unit 4 by a pipe constituting the refrigerant circuit 50, and constitutes the air conditioner 100 together with the outdoor unit 4.

<Schematic configuration of the air conditioner 100>
First, a schematic configuration of the air conditioner 100 will be described.
The indoor unit 1 includes an indoor heat exchanger 22, a crossflow fan 21 disposed in the vicinity of the indoor heat exchanger 22, a radiation panel 32, an indoor electric valve 15, and an indoor temperature for detecting the indoor air temperature. Sensor 36. The outdoor unit 4 includes a compressor 40, a four-way switching valve 41, an outdoor heat exchanger 42, an outdoor fan 43 disposed in the vicinity of the outdoor heat exchanger 42, and an outdoor electric valve 44.

  In the air conditioner 1, the indoor heat exchanger 22, the compressor 40, the four-way switching valve 41, the outdoor heat exchanger 42, and the outdoor electric valve 44 are connected to form an annular refrigerant circuit 50. An outdoor heat exchanger temperature sensor 47 is attached to the outdoor heat exchanger 42. Branch portions 50a and 50b are provided on both sides of the indoor heat exchanger 22 in the piping in the indoor unit 1, respectively. And the both ends of the bypass piping 51 are connected to the branch parts 50a and 50b. That is, the pipes on both sides of the indoor heat exchanger 22 are connected by the bypass pipe 51. The bypass pipe 51 is provided with a radiation panel 32 and an indoor motor operated valve 15. A panel input temperature sensor 27 and a panel output temperature sensor 28 are attached to both sides of the radiation panel 32 in the bypass pipe 51. An accumulator 45 is interposed between the suction side of the compressor 40 and the four-way switching valve 41 in the refrigerant circuit 50, and the discharge side of the compressor 40 and the four-way switching valve 41 in the refrigerant circuit 50 are arranged. A discharge temperature sensor 46 is attached between them.

  The indoor heat exchanger 22 has a pipe constituting a part of the refrigerant circuit 50, 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. Air heated or cooled by heat exchange with the indoor heat exchanger 22 is blown out into the room as warm air or cold air by the crossflow fan 21, whereby hot air heating or cooling is performed.

  As will be described later in detail, the radiation panel 32 constitutes a part of the surface of the indoor unit 1 and has a pipe constituting a part of the refrigerant circuit 50. Radiant heating is performed by radiating the heat of the refrigerant flowing through the pipe into the room. The indoor motor operated valve 15 is provided to adjust the flow rate of the refrigerant supplied to the radiation panel 32.

  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 the cooling is performed by flowing the refrigerant to the indoor heat exchanger 22 without flowing the refrigerant to the radiant panel 32, and the heating mode is the mode in which the refrigerant is not flowed to the indoor heat exchanger 22 without flowing the refrigerant to the radiating panel 32. In this mode, warm air is heated by flowing a refrigerant. The radiation mode is a mode in which the refrigerant is supplied to the radiant panel 32 and the radiant heating is performed while the refrigerant is supplied to the indoor heat exchanger 22 to perform the hot air heating.

  In the warm air heating mode, the indoor motor-operated valve 15 is closed and the four-way switching valve 41 is switched to the state indicated by the solid line in FIG. Therefore, the high-temperature and high-pressure refrigerant discharged from the compressor 40 flows into the indoor heat exchanger 22 through the four-way switching valve 41 as indicated by the solid arrow in FIG. The refrigerant condensed in the indoor heat exchanger 22 is decompressed by the outdoor motor operated valve 44 and then flows into the outdoor heat exchanger 42. The refrigerant evaporated in the outdoor heat exchanger 42 flows into the compressor 40 through the four-way switching valve 41 and the accumulator 45.

  In the radiant heating mode, the indoor motor-operated valve 15 is opened, and the four-way switching valve 41 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 40 flows into the indoor heat exchanger 22 and the radiation panel 32 through the four-way switching valve 41. Then, the refrigerant condensed in the indoor heat exchanger 22 and the radiation panel 32 is decompressed by the outdoor electric valve 44 and then flows into the outdoor heat exchanger 42. The refrigerant evaporated in the outdoor heat exchanger 42 flows into the compressor 40 through the four-way switching valve 41 and the accumulator 45.

<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 of this embodiment has a rectangular parallelepiped shape as a whole, and is installed near the floor surface of 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”. Further, the left-right direction shown in FIG. 2 is simply referred to as “left-right direction”.

  As shown in FIG. 4, the indoor unit 1 includes a casing 10, internal devices such as a cross flow fan 21, an indoor heat exchanger 22, an outlet unit 25, and an electrical component unit 26 housed in the casing 10, A front grill 12 is mainly provided. As will be described in detail later, the casing 10 has a main suction port 10a formed in its lower wall and auxiliary suction ports 10b and 10c formed in its front wall. Further, an air outlet 10 d is formed on the upper wall of the casing 10. 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. And in the indoor heat exchanger 22, it heats or cools with respect to the sucked air, and is harmonized. Then, 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 air outlet cover 31, a radiation panel 32, and an opening / closing panel 33. As will be described later, the air outlet cover 31 has a front panel portion 31a, and the radiation panel 32 has a front panel portion 32a. The front panel portion 31 a of the blower outlet cover 31, the front panel portion 32 a of the radiation panel 32, and the open / close panel 33 are arranged so as to be flush with each other on the front surface of the casing 10, and constitute a front panel 34. 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 34, that is, the right end portion of the front panel portion 31 a of the outlet cover 31. .

  The main body frame 11 is attached to the wall surface. The main body frame 11 supports the various internal devices described above, and a front grill 12 is attached to the front surface thereof. The outlet cover 31, the radiation panel 32, and the opening / closing panel 33 are attached to the front surface of the main body frame 11 with the front grille 12 attached. The blower outlet cover 31 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 32 is attached below the outlet cover 31, and the open / close panel 33 is attached below the radiation panel 32. Between the lower front end of the main body frame 11 and the lower end of the open / close panel 33 is a main suction port 10a which is an opening that is long in the left-right direction.

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 34, and faces upward as the front heat exchanger 22a faces the back surface of the front panel 34 and from the vicinity of the lower end portion of the front heat exchanger 22a toward the back surface. 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 so as to surround the front and the lower side of the cross flow fan 21.

  A pipe for supplying the refrigerant sent from the outdoor unit 4 to the indoor heat exchanger 22 and the radiation panel 32 is arranged 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 50 a to the indoor heat exchanger 22 and the radiation panel 32, and pipes extending from the indoor heat exchanger 22 and the radiation panel 32 to the branch part 50 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.

  A drain pan 24 extending in the left-right direction is disposed below the indoor heat exchanger 22. 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.

  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 10d formed on the upper wall 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 is applied to the power button 18 provided at the upper right end of the front panel 34 and the LED light emitter of the light emitting display unit 19. It is connected.

  As described above, the front grill 12 covers the main body frame 11 in a state where internal devices such as the crossflow fan 21, the indoor heat exchanger 22, the outlet unit 25, and the electrical component unit 26 are attached. Attached to the frame 11. More specifically, the front grill 12 is attached to the main body frame 11 so as to cover from the substantially vertical central portion of the front heat exchanger 22a to the lower end of the main body frame 11. The front grill 12 has a filter holding portion 12a and a suction port grill 12b disposed in the main suction port 10a.

  A lower filter 13 and an upper filter 14 are attached to the filter holding portion 12a. As shown in FIG. 4, the lower filter 13 held by the filter holding portion 12a extends downward from a substantially central portion in the vertical direction of the front heat exchanger 22a, and its lower end portion is inclined in the rear oblique direction. is doing. The lower end of the lower filter 13 is located in the vicinity of the rear edge of the main suction port 10a. The upper filter 14 extends upward from a substantially central portion in the vertical direction of the front heat exchanger 22a. The lower filter 13 and the upper filter 14 divide the space between the front heat exchanger 22a and the front panel 34 in the front-rear direction.

  The air outlet cover 31 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 31. Further, a front panel portion 31 a is provided on the front surface of the outlet cover 31. The front panel portion 31a has a rectangular shape that is long in the left-right direction. Here, L is the length in the vertical direction of the front panel portion 31a.

  The radiation panel 32 has a rectangular shape that is long on the left and right, and a part of the piping that constitutes the refrigerant circuit 50 is disposed inside the radiation panel 32. And the refrigerant | coolant sent from the outdoor unit 4 flows in into the radiation panel 32 from the right end part of the radiation panel 32 in front view, and flows to the left end part. Then, it is folded and flows from the left end to the right end, and flows out of the radiation panel 32 from the right end.

  A front panel portion 32 a is provided on the front surface of the radiation panel 32. The length of the front panel portion 32 a of the radiation panel 32 in the vertical direction is approximately twice that of the front panel portion 31 a of the outlet cover 31. That is, as shown in FIG. 3, the length of the front panel portion 32a in the vertical direction is about 2L. The front panel part 32 a is located below the front panel part 31 a of the outlet cover 31. As shown in FIG. 4, the substantially vertical central portion of the radiation panel 32 faces the upper end of the front heat exchanger 22a.

  The open / close panel 33 is detachably attached to the lower side of the front panel portion 32 a of the radiation panel 32. The open / close panel 33 has a rectangular shape that is long in the left-right direction, and the length in the up-down direction is approximately four times that of the front panel portion 31 a of the outlet cover 31. That is, as shown in FIG. 3, the length of the open / close panel 33 in the vertical direction is about 4L. As shown in FIG. 4, the vertical position of the upper end of the open / close panel 33 is substantially the same as the upper end of the front grill 12. As described above, the lower end of the open / close panel 33 constitutes a part of the main suction port 10a. Therefore, by removing the open / close panel 33, the front grill 12 can be exposed, and the lower filter 13 and the upper filter 14 attached to the filter holding portion 12a of the front grill 12 can be attached and detached.

  As described above, the front panel 34 includes the front panel portion 31 a provided in the outlet cover 31, the front panel portion 32 a provided in the radiation panel 32, and the open / close panel 33. And between the front panel part 32a of the radiation panel 32 and the opening-and-closing panel 33, the auxiliary | assistant suction inlet 10b which is a slit-shaped opening extended in the left-right direction (horizontal direction) is formed. An auxiliary suction port 10 c that is a slit-like opening extending in the left-right direction is also formed near the upper end of the open / close panel 33. As shown in FIG. 3, the distance in the vertical direction between the upper end of the open / close panel 33 and the auxiliary suction port 10 c is L.

  That is, the vertical length of the front panel 34 is 7L, the auxiliary suction port 10b is formed at a position 3L from the upper end of the front panel 34, and the auxiliary suction port 10c is formed at a position 3L from the lower end of the front panel 34. Has been. That is, the auxiliary suction ports 10b and 10c are provided in the central region of the front panel 34 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.

  Moreover, as shown in FIG. 4, the opening / closing panel 33 is formed with protruding portions 33a that protrude from the lower ends of the two auxiliary suction ports 10b and 10c. The protrusion 33a is inclined upward as it approaches the back surface.

<Operation of indoor unit 1>
Next, the operation of the indoor unit 1 will be described.
By driving the cross flow fan 21, indoor air is sucked into the casing 10 from the main suction port 10 a and the auxiliary suction ports 10 b and 10 c.

  A part of the air sucked from the main suction port 10a flows from the lower part to the upper part through the gap between the front panel 34 and the front heat exchanger 22a, and is supplied to the front heat exchanger 22a. Further, the remaining part of the air sucked from the main suction port 10 a flows from the front to the rear under the drain pan 24 and is supplied to the rear heat exchanger 22 b through the rear of the drain pan 24. Further, the air sucked from the auxiliary suction ports 10b and 10c flows from the lower side to the upper side through the gap between the front panel 34 and the front heat exchanger 22a, and is supplied to the front heat exchanger 22a. The air sucked from the main suction port 10a and the auxiliary suction ports 10b and 10c passes through the lower filter 13 or the upper filter 14 before being supplied to the indoor heat exchanger 22. At this time, dust contained in the air is removed.

  The air supplied to the indoor heat exchanger 22 undergoes heat exchange with the refrigerant supplied from the outdoor unit 4 in the indoor heat exchanger 22. Thereafter, the air passes through the cross flow fan 21 and is blown out from the outlet 10d.

<Characteristics of indoor unit 1 of this embodiment>
In the indoor unit 1 of the present embodiment, the casing 10 that houses the cross flow fan 21 and the indoor heat exchanger 22 is provided at the lower end thereof, and the main suction inlet 10a that sucks in air near the floor surface, and the upper end thereof And a blower outlet 10d that blows out air. Moreover, in the casing 10, the front panel 34 facing the front heat exchanger 22a of the indoor heat exchanger 22 has auxiliary suction ports 10b and 10c provided between the main suction port 10a and the outlet 10d. Yes. Accordingly, a part of the air sucked from the main suction port 10a flows from the lower side to the upper side through the gap between the front panel 34 and the front heat exchanger 22a, and then is supplied to the front heat exchanger 22a. The Since the auxiliary suction ports 10b and 10c are located above the main suction port 10a, the air sucked from the auxiliary suction ports 10b and 10c and flowing through the gap between the front panel 34 and the front heat exchanger 22a is The air reaches the upper side of the air sucked from the main suction port 10a. Therefore, the air sucked from the auxiliary suction ports 10b and 10c can be supplied to the vicinity of the upper end of the front heat exchanger 22a. Thereby, the fall of heat exchange efficiency can be suppressed.

  In the indoor unit 1 of the present embodiment, the auxiliary suction ports 10b and 10c are slit-like openings extending along the horizontal direction. Therefore, the air sucked from the auxiliary suction ports 10b and 10c can be supplied over the entire width of the front heat exchanger 22a. Therefore, a decrease in heat exchange efficiency can be reliably suppressed.

  Further, in the indoor unit 1 of the present embodiment, the auxiliary suction ports 10 b and 10 c are provided in the center region in the height direction of the front panel 34. Therefore, the air sucked from the auxiliary suction ports 10b and 10c is easily supplied to the vicinity of the upper end of the front heat exchanger 22a.

  Furthermore, in the indoor unit 1 of the present embodiment, the auxiliary suction ports 10b and 10c are provided at positions facing the front heat exchanger 22a. Therefore, the air sucked from the auxiliary suction ports 10b and 10c is easily supplied to the front heat exchanger 22a.

  In addition, in the indoor unit 1 of the present embodiment, the front panel 34 includes a radiation panel 32 that is provided above the auxiliary suction ports 10 b and 10 c and includes a part of piping that constitutes the refrigerant circuit 50. Therefore, it can suppress that the air heated with the heat radiated from the radiation panel 32 is sucked from the auxiliary suction ports 10b and 10c.

  Moreover, in the indoor unit 1 of this embodiment, the indoor heat exchanger 22 is located upward as the front heat exchanger 22a disposed substantially parallel to the front panel 34 approaches the rear surface from the vicinity of the lower end of the front heat exchanger 22a. And an inclined rear heat exchanger 22b. Therefore, the height of the front heat exchanger 22a disposed substantially parallel to the front panel 34 can be reduced as compared with the case where the entire indoor heat exchanger is formed in a plate shape and disposed substantially parallel to the front panel 34. Therefore, the casing 10 can be downsized in the height direction. Further, since the height of the front heat exchanger 22a can be shortened, the air sucked from the main suction port 10a is easily supplied to the vicinity of the upper end of the front heat exchanger 22a. That is, there is no need to increase the gap between the front panel 34 and the front heat exchanger 22a in order to supply the air sucked from the main inlet 10a to the vicinity of the upper end of the front heat exchanger 22a. 10 depth directions can also be reduced.

  Furthermore, the indoor unit 1 of this embodiment has the protrusion part 33a which inclines upward as the front panel 34 approaches a back surface from the lower end of auxiliary suction port 10b, 10c. Therefore, since the air sucked from the auxiliary suction ports 10b and 10c can flow upward, the air is easily supplied near the upper end of the front heat exchanger 22a. Further, it is possible to make it difficult to see the inside of the casing 10 from the outside.

  Moreover, the indoor unit 1 of the present embodiment includes a drain pan 24 provided below the indoor heat exchanger 22, and the protruding portion 33 a is not provided below the drain pan 24. Therefore, the flow path through which the air sucked from the main suction port 10a passes in the vicinity of the main suction port 10a can be prevented from being narrowed by the protruding portion 33a.

  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 auxiliary suction ports 10b and 10c are slit-like openings extending in the horizontal direction has been described, but the shape of the auxiliary suction ports 10b and 10c is limited to this. It is not a thing. That is, the auxiliary suction ports 10b and 10c may be slit-like openings extending in the vertical direction, or may be circular openings.

  Moreover, although the above-mentioned embodiment demonstrated the case where the auxiliary suction inlets 10b and 10c were provided in the area | region of the height direction center of the front panel 34, the position regarding the height direction of the auxiliary suction inlets 10b and 10c is shown. However, the present invention is not limited to this. That is, the auxiliary suction ports 10 b and 10 c may be provided at the lower end portion and the upper end portion of the front panel 34.

  In the above-described embodiment, the case where the auxiliary suction ports 10b and 10c are provided at positions facing the front heat exchanger 22a has been described. It does not need to be provided at the facing position.

  In addition, although the above-mentioned embodiment demonstrated the case where the two auxiliary suction ports 10b and 10c were formed, it is not limited to this. That is, the number of auxiliary suction ports may be one, or three or more.

  Furthermore, although the above-mentioned embodiment demonstrated the case where the front panel 34 included the radiation panel 32 provided above the auxiliary suction inlets 10b and 10c, it is not limited to this. That is, the radiation panel 32 may be provided below the auxiliary suction ports 10b and 10c. Further, the front panel 34 may not include the radiation panel 32.

  In addition, although the above-mentioned embodiment demonstrated the case where the indoor heat exchanger 22 was comprised from the front surface heat exchanger 22a and the back surface heat exchanger 22b, it is not limited to this. That is, for example, the entire indoor heat exchanger 22 may be formed in a plate shape that is disposed substantially parallel to the front panel 34.

  In the above-described embodiment, the case where the front panel 34 has the protruding portion 33a that is inclined upward as it approaches the back surface from the lower ends of the auxiliary suction ports 10b and 10c has been described, but the protruding portion 33a is not provided. Also good.

  Furthermore, although the above-mentioned embodiment demonstrated the case where the protrusion part 33a was not provided below the drain pan 24, the protrusion part 33a may be provided below the drain pan 24. FIG.

  In addition, in the above-described embodiment, the case of being attached to the wall surface in a state of floating about 10 cm from the floor surface has been described, but the present invention is applicable to all indoor units installed near the floor surface. Therefore, you may apply to the 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 10 Casing 10a Main suction inlet 10b, 10c Auxiliary suction inlet 10d Outlet 21 Cross flow fan 22 Indoor heat exchanger 22a Front heat exchanger 22b Rear heat exchanger 24 Drain pan 32 Radiation panel 33a Protrusion part 34 Front panel

Claims (8)

A casing having a front panel;
A cross flow fan housed in the casing;
A heat exchanger having a portion facing the back surface of the front panel in the casing,
The casing is
Provided at the lower end of the casing, and a main inlet for sucking air in the vicinity of the floor surface;
It is provided at the upper end of the casing and has a blowout port for blowing out air,
A floor-standing indoor unit for an air conditioner, wherein the front panel has an auxiliary inlet provided between the main inlet and the outlet.   The floor-standing indoor unit for an air conditioner according to claim 1, wherein the auxiliary suction port is a slit-like opening extending along a horizontal direction.   The floor-standing indoor unit for an air conditioner according to claim 1 or 2, wherein the auxiliary suction port is provided in a central region in the height direction of the front panel.   The floor-standing indoor unit for an air conditioner according to any one of claims 1 to 3, wherein the auxiliary suction port is provided at a position facing the heat exchanger.   The said front panel is provided above the said auxiliary suction port, The radiation panel which has a part of piping which comprises a refrigerant circuit is included, The any one of Claims 1-4 characterized by the above-mentioned. Air conditioner floor-standing indoor unit. The heat exchanger is
A front heat exchanger disposed substantially parallel to the front panel;
The floor-standing indoor unit for an air conditioner according to any one of claims 1 to 5, further comprising a rear heat exchanger that inclines upward from the vicinity of the lower end of the front heat exchanger toward the rear surface. .   The floor of an air conditioner according to any one of claims 1 to 6, wherein the front panel has a protruding portion that inclines upward as it approaches the back surface from the lower end of the auxiliary suction port. Place indoor unit. A drain pan provided below the heat exchanger;
The floor-standing indoor unit for an air conditioner according to claim 7, wherein the protruding portion is not provided below the drain pan.

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