JP5232497B2 - Indoor unit for air conditioning - Google Patents

Description

  The present invention relates to an indoor unit for air conditioning of an air conditioner.

In an indoor unit for air conditioning of an air conditioner installed in a building room, indoor air is sucked into the air conditioning indoor unit through a filter by a fan, cooled or heated in a heat exchanger, and then introduced into the room from the outlet. Blown out.
In such an indoor unit for air conditioning, reduction of power consumption is a constantly demanded issue, and various ideas have been made for this purpose. One of them is to reduce input pressure (power) of a motor that drives a fan by reducing in-machine pressure loss in an air conditioning indoor unit (see, for example, Patent Documents 1 and 2).

JP 2000-193264 A Japanese Patent Laid-Open No. 10-196989

As described above, reduction of power consumption is a constantly demanded problem, and there is room for further improvement in a technique for reducing the input of a motor that drives a fan.
The present invention has been made based on such a technical problem, and an object thereof is to provide an indoor unit for air conditioning that can further reduce power consumption by reducing the input of a motor that drives a fan. To do.

The inventors of the present invention, which have been diligently studied based on the above object, have focused on the air suction flow path to the air conditioning indoor unit and the in-machine pressure loss at the outlet.
As a result, it was understood that the grille and filter present on the suction flow path, and the louver present at the outlet had an influence on the in-machine pressure loss.

Accordingly, the present invention is an air conditioning indoor unit that sucks indoor air, heats or cools the air, and blows the air into the room, and includes a suction port for sucking indoor air and a blowout that blows the heated or cooled air into the room. A decorative panel having a mouth, an indoor heat exchanger that heats or cools indoor air, a blower that sends indoor air to the indoor heat exchanger, a case body that houses the indoor heat exchanger and the blower, and a suction port And / or a pressure loss suppression mechanism that suppresses the pressure loss of the air flow at the air outlet, and the pressure loss suppression mechanism includes a grille having a passage portion for air sucked from the air inlet and air that is sucked from the air inlet. Among the filters that remove foreign substances of a size, at least the grille should be in a position that covers the suction port and a position that is separated from the suction port. Characterized by a rotatably. If at least the grill is moved to a position away from the suction port, it is possible to prevent the grill from increasing pressure loss in the machine at the suction port. In order to further reduce the in-machine pressure loss, it is preferable to move not only the grill but also the filter to a position away from the suction port.
Here, when the filter is also moved, the grill and the filter can be integrated, or the grill and the filter can be moved independently.

  In addition, the pressure loss suppression mechanism can retreat a louver that is located in the blowout flow path that is continuous with the blowout opening and controls the direction of the air blown from the blowout opening to a position along the wall surface of the blowout flow path. . Thereby, it is possible to prevent the louver from increasing the in-machine pressure loss at the outlet.

  As described above, at least the grill is moved or the louver is retracted to reduce the internal pressure loss, whereby the input (power) of the motor for driving the fan of the blower can be suppressed. The mode in which the grill or louver is moved is set to the power saving mode, the mode in which the grill and the fan are covered with the suction port, and the louver is disposed in the blowing channel is set to the normal mode. The mode switching can also be switched according to the operation of the operation switch by the user or a preset control program.

In the present invention, provided so as to cover the suction port of the grille and the filter, and the grill and filter, mobile Organization for moving independently at a position spaced apart from the suction port may further comprise Turkey a.

Further, in the present invention, louvers, and it is also from the blowing passage, and further comprising benzalkonium louver evacuation Organization retracting to a position along the wall surface of the balloon channel.
The normal mode in which the louver is disposed in the blowing channel and the power saving mode in which the louver is operated by being retracted to a position along the wall surface of the blowing channel may be switchable.

  According to the present invention, it is possible to suppress the input (power) of the motor for driving the fan of the blower by reducing the pressure loss in the machine by moving at least the grill or retracting the louver. It becomes possible to suppress electric power.

Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.
FIG. 1 is a diagram for illustrating a schematic configuration of an indoor unit for air conditioning in the present embodiment.
As shown in FIG. 1, the air conditioning indoor unit 10 is connected to the air conditioning outdoor unit 1 by a refrigerant pipe 2 to constitute a ceiling-mounted air conditioner.
The air-conditioning outdoor unit 1 is installed outside and includes a compressor that compresses a refrigerant, an outdoor heat exchanger 3 that performs heat exchange between the refrigerant and outdoor air, and an outdoor fan 4.
On the other hand, the indoor unit 10 for air conditioning has an indoor heat exchanger 12 that performs heat exchange between the refrigerant and indoor air inside a case body 11 that is embedded in a ceiling (not shown). Is circulated between the air conditioning outdoor unit 1 and the air conditioning indoor unit 10.

The air conditioning indoor unit 10 further includes a blower 14, a motor (not shown) for driving the blower 14, and an air guide plate 15 inside the case body 11.
A decorative panel 19 is provided at the bottom of the case body 11. In the lower part of the decorative panel 19, an air inlet 16 for indoor air is formed in the central part, and an outlet 17 for blowing air into the room is formed in the outer peripheral part.

  During the operation of the ceiling-mounted air conditioner, the blower 14 is driven, and indoor air is guided from the suction port 16 to the air guide plate 15 and sent to the indoor heat exchanger 12. And it cools or heats in the process of flowing through the indoor heat exchanger 12 through which the refrigerant from the air-conditioning outdoor unit 1 is passed, and becomes conditioned air and blows out into the room from the outlet 17.

Here, a grill 20 is provided in the suction port 16 at the center of the decorative panel 19 so as to cover it. The grill 20 has an opening such as a slit through which indoor air passes.
On the back side of the grill 20 (the side facing the inside of the case main body 11), a filter 21 for removing dust and the like contained in the indoor air sucked through the opening of the grill 20 is provided. The filter 21 may be provided integrally with the grill 20, or the filter 21 may be held by a frame-like frame (not shown) and disposed on the back side of the grill 20.

As shown in FIG. 1 and FIG. 2A, the grill 20 and the filter 21 are provided as a pressure loss suppressing mechanism so as to be movable up and down with respect to the case body 11 fixed to the ceiling. For this reason, the grill 20 and the filter 21 are attached to the lower ends of a plurality of rods 22 that are held by the case body 11 so as to be movable up and down.
Since this rod 22 functions as a mechanism for moving the grill 20 and the filter, it can be moved up and down by a motor driven by a rack and pinion mechanism, a ball screw mechanism or the like. In this case, the rod 22 can also constitute a rack gear or a ball screw. Further, the rod 22 can be moved up and down by an air cylinder, a hydraulic cylinder or the like. In addition, the grill 20 and the filter 21 can be moved up and down by a link mechanism or the like instead of the rod 22. Here, the mechanism for raising and lowering the grill 20 and the filter 21 is not intended to be limited to the above-described one, and other mechanisms can be appropriately employed.

  The raising and lowering operations of the grill 20 and the filter 21 using the mechanism as described above are automatically controlled by the controller of the air conditioning indoor unit 10.

In the air conditioning indoor unit 10, operation control is performed in a plurality of modes including a mode that prioritizes air conditioning and a mode that prioritizes power saving.
In a mode in which air conditioning is prioritized, the blower 14 is driven as in the prior art, and indoor air is guided from the suction port 16 to the air guide plate 15 and sent to the indoor heat exchanger 12. And it cools or heats in the process of flowing through the indoor heat exchanger 12 through which the refrigerant from the air-conditioning outdoor unit 1 is passed, and becomes conditioned air and blows out into the room from the outlet 17. At this time, the grill 20 and the filter 21 are disposed at a position where the suction port 16 of the case body 11 is closed, as indicated by a solid line in FIG.
On the other hand, in the mode in which power saving is prioritized, the grill 20 and the filter 21 are lowered from the suction port 16 to secure a gap with the case body 11 as shown by a two-dot chain line in FIG. It is assumed that This gap is set to a size sufficient to prevent pressure loss when the room air is sucked from the suction port 16. Thereby, the pressure loss at the time of inhaling indoor air reduces compared with the mode which gives priority to air conditioning. As a result, it is possible to reduce the input of the motor for driving the fan of the blower 14 and to suppress power consumption.

  In the above, the grill 20 and the filter 21 are lowered. However, when the grill 20 and the filter 21 can be moved up and down independently, only the grill 20 is lowered or the grill 20 and the filter 21 are lowered. It is also possible to vary the descending amount (dimension) of 21.

In the air conditioning indoor unit 10, a louver 30 for controlling the direction of the blown air is provided at the air outlet 17.
The louver 30 operates in the outlet 17 as a pressure loss suppression mechanism by a swing mechanism 31 described in detail later. As shown in FIG. 2 (b), the swinging mechanism 31 blows out the louver 30 in the blowing passage 18 formed so as to be continuous with the blowing outlet 17 in the case body 11. A wind direction control position P1 for controlling the direction of the blown air that is located in the flow path 18 and a retreat position P2 that is located along the wall surface of the blow flow path 18 and is retreated so as not to disturb the blown air. Move between two positions. Further, the swing mechanism 31 changes the angle of the louver 30 with respect to the wind blowing direction in the blowing channel 18 at the wind direction control position P1.

As shown in FIG. 3, in the swing mechanism 31, the connecting shaft 35 is rotatably held by a pair of holders 36 fixed to the case body 11 (see FIG. 2A). An arm 42 is fixed to one end of the connecting shaft 35 via a key, and a gear 34b and a bearing 34b fixed to the L-shaped arm 33 are fixed to the other end of the connecting shaft 35 via a key. A gear 34c is rotatably supported at the tip. The motor 34 is fixed to the upper part of the arm 33, and a gear 34a is fixed to the rotating shaft of the motor 34 through a key. The gear 34b meshes with the gear 34c, and the gear 34d meshes with the gear 34c. The gear 34 d is fixed to a shaft 43 that is rotatably inserted in a bearing 40 that is fixed to the lower portion of the arm 33.
Shafts 32 a and 32 b are integrally provided at both ends of the louver 30. The shaft 32 a is inserted and fixed in a hole provided at one end of the shaft 43, and the shaft 32 b is inserted and fixed in a hole provided in a shaft 44 that is rotatably inserted in the arm 42. Thereby, the gears 34a, 34c, and 34d are rotated by the forward / reverse rotation of the motor 34, and the louver 30 swings around the shafts 32a and 32b.
The motor 37 is fixed to the case body 11 (see FIG. 2A), and a gear 37a is fixed to the rotating shaft of the motor 37. The gear 37a meshes with a gear 37b fixed to the connecting shaft 35, and the gears 37a and 37b are rotated by forward and reverse rotation of the motor 37, and swing around the arms 33 and 42 and the connecting shaft 35 as fulcrums.
Here, the connecting shaft 35, the holder 36, and the motor 37 are fixed to the case main body 11 (see FIG. 2A) at a position where the connecting shaft 35, the holder 36, and the motor 37 are not exposed in the blowing flow path 18, and the pair of arms 33 are The louver 30 is exposed in the blowing channel 18 through the hole formed in the blowing channel 18.

In such a swing mechanism 31, the motor 37 is actuated to rotate the connecting shaft 35, whereby the arm 33 and the arm 42 swing about the connecting shaft 35. Then, the louver 30 moves in the blowing channel 18 formed so as to be continuous with the blowing port 17 in the case body 11. As a result, the louver 30 is positioned in the blowout flow path 18 to control the direction of the blown air, and is positioned along the wall surface of the blowout flow path 18 so as not to hinder the blown wind. It moves between two positions, the retreat position P2 for retreat.
When the louver 30 is in the wind direction control position P1, when the motor 34 is operated, the shafts 32a and 32b rotate via the gears 34a, 34c and 34d, and the angle of the louver 30 changes. Accordingly, the angle of the louver 30 with respect to the wind blowing direction in the blowing channel 18 is changed at the wind direction control position P1.

In the air conditioning indoor unit 10, in the mode in which priority is given to the air conditioning, the louver 30 is arranged at the wind direction control position P 1 and the angle thereof is changed by forward / reverse rotation of the motor 34 in the same manner as in the past. Controls the direction of wind blowing.
On the other hand, in the mode in which power saving is prioritized, the louver 30 is positioned at the retracted position P2 so that the louver 30 does not impair the air flow in the blowing flow path 18. Thereby, the pressure loss when conditioned air blows out from the blowout port 17 through the blowout flow path 18 is reduced as compared with the mode in which air conditioning is prioritized. As a result, it is possible to reduce the input of the motor for driving the fan of the blower 14 and to suppress power consumption.

  Here, the swing mechanism 31 eliminates the gears 34a, 34c, 34d, 37a, 37b, etc., and as shown in FIG. 4, the louver 30 can be swung by the motor 34 held by the arm 33, and the arm 42 It is also possible to adopt a configuration in which the connecting shaft 35 is directly driven to rotate by the motor 37 held on the shaft.

In the above embodiment, the configuration of the air conditioning indoor unit 10 has been described. However, any configuration other than the portion related to the main part of the present invention may be used.
Further, the mechanism for raising and lowering the grill 20 and the filter 21, the louver 30 and the swinging mechanism 31 may have any other configuration as long as a required function can be realized.
In addition to this, as long as it does not depart from the gist of the present invention, the configuration described in the above embodiment can be selected or changed to another configuration as appropriate.

It is a perspective view which shows the structure of the ceiling installation type air conditioner in this Embodiment. It is a figure which shows the indoor unit for air conditioning, (a) is sectional drawing, (b) is a figure which shows the motion of a louver. It is a perspective developed view which shows the rocking mechanism of a louver. It is a perspective developed view showing another example of the swing mechanism of the louver.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Indoor unit for air conditioning, 11 ... Case main body, 12 ... Indoor heat exchanger, 14 ... Air blower, 16 ... Suction port, 17 ... Outlet, 18 ... Outlet channel, 19 ... Makeup panel, 20 ... Grill, 21 ... Filter, 22 ... Rod, 30 ... Louver, 31 ... Swing mechanism

Claims (5)

An air conditioning indoor unit that sucks indoor air, heats or cools the air, and blows it into the room,
A decorative panel comprising a suction port for sucking in the indoor air and a blow-out port for blowing heated or cooled air into the room;
An indoor heat exchanger for heating or cooling the indoor air;
A blower for sending the indoor air to the indoor heat exchanger;
A case main body that houses the indoor heat exchanger and the blower;
A pressure loss suppressing mechanism that suppresses pressure loss of the air flow at the suction port and / or the air outlet;
Equipped with a,
The pressure loss suppressing mechanism includes at least the grill among a grill having a passage portion for the air sucked from the suction port and a filter for removing foreign matters having a predetermined size or more from the air sucked from the suction port. An air conditioning indoor unit that is movable between a position that covers the suction port and a position that is separated from the suction port . The pressure loss suppression mechanism is capable of retracting a louver located in a blowout flow path continuous with the blowout opening and controlling the direction of the air blown from the blowout opening to a position along the wall surface of the blowout flow path. air conditioning indoor unit according to claim 1, wherein the. The grill and the filter are provided so as to cover the suction port,
Before and Symbol grill the filter, the indoor unit air conditioner as claimed in claim 1 or 2, further comprising a mobile structure for moving independently at a position spaced from said suction port. The pre-Symbol louver, the air conditioning indoor unit according to claim 2 from the blow-out flow path, and further comprising a louver evacuation Organization retracting to a position along the wall surface of the blowout passage. It is possible to switch and control between a normal mode in which the louver is operated in a state where the louver is disposed in the blowing channel and a power saving mode in which the louver is operated by retracting the louver to a position along the wall surface of the blowing channel. The indoor unit for air conditioning of Claim 2 or 4 characterized by these.

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