JP2015140993A - Air-conditioner indoor unit and air-conditioner including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an indoor unit of a ceiling-embedded air-conditioner, capable of securing design when the indoor unit operates and stops operating while securing an opening area of an air inlet.SOLUTION: An air-conditioner indoor unit comprises: a casing that includes a decorative panel having an air inlet and an air outlet and provided on a lower surface of the casing; a cross-flow fan disposed in the casing, drawing in indoor air from the air inlet, and blowing out the indoor air from the air outlet; an indoor heat exchanger disposed in the casing leeward of the cross-flow fan; a filter disposed in the casing windward of the cross-flow fan; a suction panel that can cover the air inlet; and a panel drive motor rotating the suction panel around a rotary shaft, the suction panel being constituted by a plurality of split panels disposed in a longitudinal direction of the indoor unit, and at least one of the split panels being located downward of the rotary shafts of the other split panels.

Description

  The present invention relates to an air conditioner.

  Since the ceiling-embedded indoor unit has a structure in which the indoor unit is embedded in the ceiling, the air inlet and the air outlet must be provided on the decorative panel located below the indoor unit. For this reason, there is a problem that the opening area of the decorative panel is increased and the design property is poor.

  In Patent Document 1, the suction panel 4 is supported so that the front side can rotate, the rear side is supported so as to open and close the air suction port 30a, and the panel driving device 7 is provided on the rear side of the suction panel 4. An air conditioner including a panel lifting arm 71 that supports the arm and an arm lifting mechanism that rotates the rear side of the suction panel 3 by moving the panel lifting arm 71 up and down is described.

  According to the air conditioner of Patent Document 1, since the suction panel covers the air suction port when the operation is stopped and the suction panel is opened when the operation is performed, the design is improved when the operation is stopped while securing the air passage. Can do.

JP 2001-273315 A

  However, the indoor unit compresses the air sucked from the air suction port by the indoor cross-flow fan 130 and blows it out from the air outlet. Therefore, in order to reduce ventilation resistance, it is necessary to make the air inlet larger than the air outlet. That is, in the air conditioner of Patent Document 1, the length of the suction panel is longer than that of the blowout panel, and the suction panel protrudes greatly from the decorative panel during operation, and the design properties during operation are poor.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an indoor unit of an air conditioner that has an improved design at the time of operation and when the operation is stopped while ensuring an opening area of an air suction port in a ceiling-embedded indoor unit. And

  The present application includes a plurality of means for solving the above-described problems. To give an example, an indoor unit of an air conditioner includes a housing having a decorative panel having an air inlet and an air outlet on the lower surface, A cross-flow fan that is arranged in the housing, sucks room air from the air suction port, and blows out the air from the air blow-out port; an indoor heat exchanger that is arranged leeward of the cross-flow fan in the housing; and the wind of the cross-flow fan in the housing A filter disposed above, a suction panel that can cover the air suction port, and a panel drive motor that rotates the suction panel around the rotation axis, and the suction panel is disposed in the longitudinal direction of the indoor unit When the suction panel covers the air suction port, at least one of the split panels is positioned below the rotation axis of the other split panel.

  ADVANTAGE OF THE INVENTION According to this invention, the indoor unit of the air conditioner which improved the designability at the time of a driving | operation and the time of an operation stop can be provided, ensuring the opening area of an air suction inlet in a ceiling embedding type indoor unit.

1 is a cycle configuration diagram of an air conditioner according to Embodiment 1. FIG. It is a perspective view of the indoor unit of the air conditioner in connection with Example 1. It is a longitudinal cross-sectional view of the air conditioner of FIG. It is the longitudinal cross-sectional view which closed the suction panel of the air conditioner of FIG. It is a perspective view at the time of the operation stop of the air conditioner of FIG. It is a figure explaining the method of opening a suction panel at the time of dust removal of the air conditioner of FIG.

  Embodiments of the present invention will be described in detail with reference to the drawings as appropriate. In addition, the same code | symbol is attached | subjected to the common part in each figure, and the overlapping description is abbreviate | omitted.

  FIG. 1 is a cycle configuration diagram of the air conditioner according to the first embodiment. During the cooling operation, the high-temperature and high-pressure refrigerant discharged from the compressor 101 flows into the outdoor heat exchanger 103 through the four-way valve 102. The refrigerant that has flowed into the outdoor heat exchanger 103 is condensed and becomes liquid refrigerant by exchanging heat with outdoor air sent by the outdoor blow-through once-through fan 104. The liquid refrigerant passes through the expansion valve 105 to become a low-temperature and low-pressure two-phase refrigerant and flows into the indoor heat exchanger 120.

  The low-temperature and low-pressure two-phase refrigerant that has flowed into the indoor heat exchanger 120 exchanges heat with indoor air sent by a cross-flow fan (indoor fan) 130. At this time, the indoor air sent to the indoor heat exchanger 120 is cooled by the low-temperature and low-pressure two-phase refrigerant that has flowed into the indoor heat exchanger 120 and is discharged into the room from the outlet. Since the air discharged into the room from the outlet is lower than the temperature of the air at the inlet, the room temperature can be lowered. The refrigerant heat-exchanged by the indoor heat exchanger 120 returns to the compressor 101 again via the four-way valve 102. The compressor 101, the outdoor heat exchanger 103, the outdoor blower fan 104, and the expansion valve 105 are disposed in the outdoor unit, and the indoor heat exchanger 120 and the cross-flow fan 130 are disposed in the indoor unit 100.

  Next, an example of an indoor unit of an air conditioner provided with a decorative panel having a plurality of suction panels covering the air suction port will be described with reference to FIGS. 2 is a perspective view showing an installation state of the indoor unit 100 of the air conditioner, and FIG. 3 is a longitudinal sectional view of the indoor unit 100 of FIG. Here, FIG. 2 and FIG. 3 show an operation state in which the suction panels 4a, 4b, 4c, 4d and the blowout panel 22 are opened. Note that the indoor unit 100 of the present embodiment is a ceiling-embedded air conditioner.

  The indoor unit 100 includes a housing 30, a cross-flow fan 130, a cross-flow fan motor 10, an indoor heat exchanger 120, a filter 11, a panel drive motor 7, and the like.

  The housing 30 includes a housing body 2 embedded in a ceiling surface 31 and a decorative panel 3 that covers the lower surface opening of the housing body 2. The housing 30 is suspended from the upper wall surface in the ceiling via a suspension bolt 32. The housing body 2 has a rectangular parallelepiped external shape having a depth dimension (a dimension in the front-rear direction) smaller than a width dimension (a dimension in the left-right direction) and a height dimension smaller than the depth dimension. A square hole is formed in the top surface 31 at a position matching the bottom surface of the housing body 2.

  The air suction port 30 a is provided long in the left and right in the rear part of the decorative panel 3, and the air outlet 30 b is provided in the left and right in the front part of the decorative panel 3.

  The once-through fan 130 is disposed in the housing 2 so as to suck indoor air from the air suction port 30a and blow out from the air blower outlet 30b after passing through the indoor heat exchanger 120. This cross-flow fan 130 is a cross-flow fan that is long in the left-right direction. The cross-flow fan motor 10 that drives the cross-flow fan 130 is juxtaposed on one side of the cross-flow fan 130 in the left-right direction, and the rotary shafts of the cross-flow fan 130 and the cross-flow fan motor 10 are connected to each other. In FIG. 3, the cross-flow fan motor 10 is shown together with the cross-flow fan 130 so as to represent the positional relationship between the two. It is partitioned. Note that the front, rear, left and right in the indoor unit 100 of the present embodiment have the air outlet as the front side with reference to a standard installation example.

  The decorative panel 3 is disposed so as to cover the lower surface opening of the housing body 2 and the edge of the hole of the top surface 31 and to be exposed below the ceiling surface 31. The decorative panel 3 has a rectangular shape larger than that of the housing body 2 when viewed from above, and is attached to the housing body 2. The decorative panel 3 constituting the lower surface of the housing 30 is provided with an air inlet 30a and an air outlet 30b. The decorative panel 3 is provided with a plurality of divided panels 4a, 4b, 4c, and 4d that open and close the air suction port 30a, and an outlet panel 22 that opens and closes the air outlet 30b. The divided panels 4a, 4b, 4c, and 4d and the blowout panel 22 are panels that open the air inlet 30a and the air outlet 30b when the indoor unit 100 is in operation, and close the air inlet 30a and the air outlet 30b when the operation is stopped. It is driven by a drive motor 7.

  The blowout panel 22 is rotatably supported at the rear side, and is rotated by the blowout panel drive motor. This blowing panel 22 also serves as a blowing wind direction plate that raises and lowers the wind direction, and the wind direction sent into the room can be adjusted by adjusting the opening / closing angle of the blowing panel 22. The blow-out panel 22 is driven so as to blow mainly the wind forward from the air outlet 30b during cooling, and mainly blow the wind downward during heating by controlling the blow-panel drive motor with a control device.

  The divided panels 4 a, 4 b, 4 c, 4 d and the blowout panel 22 are installed with a lower surface continuous from the lower surface of the central portion of the decorative panel 3. In other words, the lower surface of the front portion and the rear portion of the decorative panel 3 is located above the lower surface of the central portion via the stepped portion, and the divided panels 4a, 4b, 4c, 4d and the blowout The panel 22 is installed in a space formed by the stepped portion. With such a configuration, the appearance design of the lower surface of the air conditioner can be improved.

  When the indoor unit 100 is operated, the compressor 101 is driven to operate the refrigeration cycle, the panel driving motor 7 is driven, and the divided panels 4a, 4b, 4c, and 4d are rotated and the air suction port 30a is rotated. The blower panel drive motor is driven and the blower panel 22 rotates to open the air outlet 30b, and the cross-flow fan motor 10 is driven to rotate the cross-flow fan 130. These operations are controlled by the control device.

  The opening / closing speed at which the divided panels 4a, 4b, 4c and 4d are opened is determined by the rotational speed of the panel drive motor 7, and can be easily changed by changing the command data from the control device.

  Due to the rotation of the cross-flow fan 130, the room air is sucked into the housing 30 through the air suction port 30 a and passes through the filter 11. At this time, dust contained in the room air is collected by the filter 11. The indoor air that has passed through the filter 11 is subjected to air conditioning such as heating, cooling, and dehumidification by the indoor heat exchanger 120, and then blown out again from the air outlet 30 b to the indoor space through the cross-flow fan 130.

  The indoor unit compresses the air sucked from the air suction port 30a by the cross-flow fan 130 and blows it out from the air outlet 30b. Therefore, in order to reduce the air resistance, it is necessary to make the air inlet 30a larger than the air outlet 30b. That is, the length of the suction panel 4 is longer than that of the blowout panel 22, and the suction panel 4 protrudes greatly from the decorative panel 3 during operation.

  Therefore, the indoor unit of the air conditioner of the present embodiment is arranged in the casing 30 having the decorative panel 3 having the air inlet 30a and the air outlet 30b on the lower surface, and the casing 30, and the indoor air is air A cross-flow fan 130 that blows out from the suction port 30 b through the suction port 30 a, an indoor heat exchanger 120 that is disposed leeward of the cross-flow fan 130 in the housing 30, and an upwind of the cross-flow fan 130 in the housing 30. The filter 11 arranged, the suction panel 4 that can cover the air suction port 30a, and the panel drive motor 7 that rotates the suction panel 4 around the rotation shaft 5 are provided. When composed of a plurality of divided panels 4a, 4b, 4c, and 4d arranged in the longitudinal direction and the suction panel 4 covers the air suction port 30a, at least one of the divided panels is rotated by the other divided panel. 5 located below.

  According to the indoor unit of the air conditioner of the present embodiment, a predetermined ventilation area can be secured by opening the plurality of divided panels 4a, 4b, 4c, and 4d with respect to the amount of air suction required during the air conditioning operation. Ventilation resistance can be reduced. Furthermore, since the suction panel 4 is composed of a plurality of divided panels 4a, 4b, 4c, 4d, the length of the divided panel of the suction panel 4 in the depth direction is short, and the divided panels 4a, 4b, 4c of the suction panel 4 are short. The rear end of 4d is not greatly lowered from the decorative panel 3, and the design can be improved.

  In this embodiment, when the suction panel 4 covers the air suction port 30a, at least one of the divided panels is positioned below the rotating shaft 5 of the other divided panel, and the suction panel does not overlap when the operation is stopped. In order to cover the air suction port 30a, the panel portion of the divided panel is connected to the rotary shaft 5 via a link. That is, since the panel part and the rotating shaft 5 are separated, the dividing panel can be positioned below the rotating shaft 5 of another dividing panel without overlapping the dividing panels.

  Furthermore, the indoor unit of the air conditioner of the present embodiment includes a blowout panel 22 that can cover the air blowout port 30b of the decorative panel 3, and the air suction port 30a has a larger opening area than the air blowout port 30b, and The number of divided panels of the suction panel 4 is larger than the number of the blowout panels 22.

  According to the indoor unit of the air conditioner of the present embodiment, the necessary opening area can be secured even if the rear ends of the divided panels 4a, 4b, 4c, and 4d of the suction panel 4 do not drop greatly from the decorative panel 3, and the indoor unit Ventilation resistance can be reduced.

  Each of the divided panels 4a, 4b, 4c, and 4d is pivotally supported on the rotary shaft 5 so that the front side is rotatable, and each suction panel is interlocked by a panel link 41a. The air suction port 30a is opened and closed by the rotating operation of the divided panels 4a, 4b, 4c, and 4d. The panel link 41a is connected to the panel drive motor 7 via the panel link 41b and the panel link 41c, and operates in the front-rear direction. As described above, since the length in the depth direction is shortened by using a plurality of suction panels, the axial moment is reduced at the rotating shaft 5 of each divided panel, so that it operates with a link mechanism that is not complicated as described above. Is possible.

  That is, in the indoor unit of the air conditioner of this embodiment, the rotating shafts 5 of the plurality of divided panels 4a, 4b, 4c, and 4d are connected to one panel driving motor 7, and the panel driving motor 7 is a stepping motor. The lengths of the divided panels 4a, 4b, 4c, and 4d of the suction panel 4 are shorter than the length of the blowout panel 22. According to the indoor unit of the air conditioner of the present embodiment, the axial moment can be reduced on the rotating shaft 5 of each divided panel. Therefore, the rotating shaft 5 can be rotated by the stepping motor without a complicated structure.

  The horizontal dimensions of the suction panel 4 and the blowout panel 22 are the same as each other, and are set to be the same as the horizontal dimension of the decorative panel 3. In other words, the suction panel 4 and the blow-out panel 22 protrude in the left-right direction from the air suction port 30 a and the air blow-out port 30 b and extend to both side ends of the decorative panel 3. From this point, the appearance design of the lower surface of the air conditioner can be improved.

  The indoor heat exchanger 120 is arranged in the ventilation path on the air suction side of the cross-flow fan 130 in the housing 30. The indoor heat exchanger 120 includes a back surface heat exchanger 120 a provided on the back side of the cross-flow fan 130 and a bottom surface heat exchanger 120 b provided on the bottom surface side of the cross-flow fan 130. The rear heat exchanger 120a is inclined and installed such that its lower part is located on the front side (cross-flow fan side) and its upper part is located on the rear side (counter-flow fan side). The lower surface heat exchanger 120b is installed with an inclination so that the front side thereof is slightly lower.

  By attaching the rear heat exchanger 120a and the lower heat exchanger section 9b with different attachment angles, the heat transfer area as the indoor heat exchanger 120 can be increased, and the performance can be improved. Here, by eliminating the slits of the plate fins of the lower-surface indoor heat exchanger 120b having a small inclination, the flow of the dew condensation water during the cooling operation is improved, and the dew condensation water is accumulated in the slit portion or the dew condensation water is large. It is possible to suppress problems such as a decrease in air volume and an increase in noise due to ventilation resistance.

  By setting the heat transfer area of the back heat exchanger 120a and the bottom heat exchanger unit 9b in response to the small wind speed distribution of the bottom indoor heat exchanger 120b and the large wind speed distribution of the back heat exchanger 120a, The balance between the air volume and the heat transfer area can be optimized, which is effective for improving performance and reducing noise.

  A lower surface heat exchanger 120b continuously extends from the lower end of the rear heat exchanger 120a to surround the cross-flow fan 130 downward and forward. With such a configuration, the ventilation area of the indoor heat exchanger 120 can be increased without increasing the height dimension, the heat exchange performance can be improved with low noise, and it is suitable for a ceiling-embedded air conditioner. It has become. In addition, a substantially triangular space is formed on the back side of the indoor heat exchanger 120 as viewed from the side.

  The indoor heat exchanger 120 constitutes a part of the refrigeration cycle. The refrigeration cycle is configured to circulate refrigerant in the order of the compressor 31, the four-way valve 32, the outdoor heat exchanger 33, the decompression device 34, the indoor heat exchanger 120, the four-way valve 32, and the compressor 31. The indoor heat exchanger 120 (the back surface heat exchanger 120a and the bottom surface heat exchanger 120b) includes a large number of fins juxtaposed in the left-right direction and a meandering refrigerant pipe that passes through these fins.

  The filter 11 collects dust from indoor air flowing into the indoor heat exchanger 120, and includes a frame portion and a mesh portion. The filter 11 is disposed in the ventilation path on the air suction side of the indoor heat exchanger 120 in the housing 30.

  4 shows a closed cross section of the divided panels 4a, 4b, 4c, and 4d when the operation is stopped, and FIG. 5 shows a perspective view when the operation is stopped. When the operation is stopped, the divided panels 4a, 4b, 4c, and 4d cover and close the air suction port 30a so that they do not overlap each other and there is no gap between them. Since the divided panels 4a, 4b, 4c, and 4d correspond to the curvature of the position facing the decorative panel 3, the surface of the decorative panel 3 becomes flat and the design can be improved. Further, the closed shape can prevent room air from entering the housing and contaminating the inside with dust in the room air.

  FIG. 6 is a view for explaining a method of opening the suction panel when dust is removed from the air conditioner of FIG. In this embodiment, as shown in FIG. 6, the connection of the panel links 41a and 41b is released, and the support mechanism 17 of the reinforcing plate 42 to the decorative panel 3 is released, thereby exposing the air suction port 30a. Further, the filter 11 can be in a state when dust is removed.

  The divided panels 4a, 4b, 4c, and 4d are a plurality of strip-shaped synthetic resin panel members that open and close the air suction port 30a, and the rotating shaft 5 of each of the suction panels 4 is provided on a metal reinforcing plate 42. Yes. The reinforcing plate 42 can rotate rearward coaxially with the divided panel 4a. That is, the indoor unit of the air conditioner of the present embodiment is provided above the decorative panel 3 and includes a reinforcing plate 42 that can rotate around the rotating shaft, and the rotating shaft 5 of the suction panel 4 is provided on the reinforcing plate 42. It has been. According to the indoor unit of the air conditioner of the present embodiment, the workability of removing dust from the filter 11 can be improved.

  In addition, this invention is not limited to each embodiment, Moreover, you may combine embodiment mentioned above suitably.

  DESCRIPTION OF SYMBOLS 1 ... Air conditioner, 2 ... Housing body, 3 ... Cosmetic panel, 4 ... Suction panel, 4a ... Divided panel, 4b ... Divided panel, 4c ... Divided panel, 4d ... Divided panel, 5 ... Rotating shaft, 7 ... Panel Drive motor, 120 ... indoor heat exchanger, 120a ... back heat exchanger, 120b ... bottom heat exchanger, 130 ... cross-flow fan, 10 ... cross-flow fan motor, 11 ... filter, 17 ... reinforcing plate support mechanism, 21 ... vertical Vanes, 22 ... blowout panel, 30 ... casing, 30a ... air inlet, 30b ... air blowout, 31 ... compressor, 32 ... four-way valve, 33 ... outdoor heat exchanger, 34 ... decompression device, 41a ... panel link a, 41b ... panel link b, 41c ... panel link c, 41d ... panel link d, 42 ... reinforcing plate

Claims (5)

A housing provided on the lower surface with a decorative panel having an air inlet and an air outlet;
A once-through fan that is disposed in the housing, sucks in indoor air from the air suction port, and blows out the air blowout port;
An indoor heat exchanger disposed leeward of the cross-flow fan in the housing;
A filter disposed on the windward side of the cross-flow fan in the housing;
A suction panel capable of covering the air inlet;
A panel drive motor for rotating the suction panel around a rotation axis;
The suction panel is composed of a plurality of divided panels arranged in the longitudinal direction of the indoor unit,
When the suction panel covers the air suction port, at least one of the divided panels is an indoor unit of an air conditioner positioned below the rotation shaft of the other divided panel. A blowout panel capable of covering the air blowout port of the decorative panel;
2. The air conditioner room according to claim 1, wherein the air inlet has an opening area larger than that of the air outlet, and the number of the divided panels of the suction panel is larger than the number of the outlet panels. Machine. The rotating shafts of the plurality of divided panels are connected to one panel driving motor,
The panel driving motor is a stepping motor,
The indoor unit of the air conditioner according to claim 1 or 2, wherein a length of the divided panel of the suction panel is shorter than a length of the blowout panel. Provided above the decorative panel, comprising a reinforcing plate that can rotate around a rotation axis,
The indoor unit of an air conditioner according to any one of claims 1 to 3, wherein the rotation shaft of the suction panel is provided on the reinforcing plate. An indoor unit for an air conditioner according to any one of claims 1 to 4,
An air conditioner including a compressor, an outdoor heat exchanger, an outdoor fan, and an outdoor unit having an expansion valve.