JP2009257604A - Air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner for setting a panel to a desired position in a short time. <P>SOLUTION: In opening and closing motion of a panel disposed while its central shaft of rotation is deflected to one side in the vertical direction of the panel, motor load is reduced by decreasing a rotating speed of a motor for driving the panel by self-weight of the panel when rotating torque applied to the central shaft of the rotation is increased, and the rotating speed of the motor is increased when the rotating torque is low, thus the panel is quickly opened and closed to the desired position. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an air conditioner having a panel in an indoor unit that opens and closes an outlet according to a cooling and heating operation.

In the conventional air conditioner, as shown in Patent Document 1, at the air outlet of the indoor unit, the rotation fulcrum of the up / down direction wind direction changing blade is positioned in front of the air outlet and rotates around the output shaft. A wind direction changing blade is rotatably attached to the tip of the arm portion to be driven, the arm portion is driven by the first motor, the wind direction changing blade is driven by the second motor, and the arm portion and the wind direction changing blade are independently provided. It is known to create a comfortable living environment by operating cold air and warm air freely in the vertical direction.
JP 2006-138629 A

  By the way, in patent document 1, since a rotation center axis is located in the center of a wind direction change blade | wing, the rotational speed of a 1st motor and a 2nd motor is constant in any axial rotation position. However, if the panel is large and the rotation center axis of the panel is biased to one side of the panel, the rotational torque fluctuates due to the panel's own weight, and the motor load increases at a position where the rotational torque is high. The motor load is reduced at a position where the rotational torque is low.

  In such a panel opening / closing operation in which the rotational torque fluctuates, there is a desire to set the panel at a desired position in a short time.

  In view of the above, an object of the present invention is to provide an air conditioner that can set a panel at a desired position in a short time.

  In order to achieve the above object, the present invention comprises a panel disposed at a blowout opening of a cabinet, a panel opening / closing mechanism having a motor for opening / closing the panel, and a control unit for controlling the panel opening / closing mechanism, The panel is provided with an opening / closing rotation center axis that is biased to either side of the panel in the up / down direction, and the control unit performs the operation according to the rotational torque applied to the panel rotation center axis during the panel opening / closing operation. When the rotational torque is high, the motor rotational speed is made low, and when the rotational torque is low, the motor rotational speed is controlled at high speed.

  According to the above configuration, during the opening / closing operation of the panel, the motor load is reduced by reducing the motor rotation speed when the rotation torque is high according to the rotation torque applied to the panel rotation center axis, and the motor load is reduced when the rotation torque is low. Since the rotation speed is increased, the panel can be quickly opened and closed at a desired position.

  Incidentally, the fluctuation of the rotational torque applied to the panel rotation center axis is influenced by the weight of the panel. Therefore, when the weight of the panel is applied on the opposite side to the rotation direction, the rotational torque becomes high, so the motor rotation speed is reduced. Further, when the weight of the panel is applied in the rotation direction, the rotational torque is lowered, so that the rotational speed of the motor is increased.

  "Low speed" and "high speed" represent the relative speed of the motor. “Low speed” and “high speed” are not limited to two preset speeds, and may be speeds that change stepwise or continuously. A pulse control can be exemplified as a mode in which the rotational speed of the motor is controlled at a variable speed stepwise or continuously.

  In variable speed control of the motor, when the panel is raised in the direction opposite to the direction in which the weight of the panel is applied, the motor rotation speed is rotated at the maximum speed at which the torque required to raise the panel against gravity can be obtained. Dynamic control. That is, even if the control is performed at “low speed”, the control is performed at the maximum speed that does not hinder the motor operation. Further, when the weight of the panel is applied in the rotation direction, the motor rotation speed is controlled to be higher than the speed (maximum speed at a low speed). Thereby, the posture of the panel can be quickly switched to a predetermined position.

  In addition, when the pivot center axis is disposed on the upper end side of the panel, the panel has a closed position in which the lower end of the panel recedes from the pivot center axis and covers the outlet, and the lower end of the panel is less than the pivot center axis. In addition, it is possible to freely switch and rotate between the forwardly opened upper opening posture. In this case, the control unit increases the motor rotation speed from the panel closing position to the position where the lower end of the panel is at the lowest end, and quickly moves the panel to the lowest end position. It is possible to reduce the load on the motor by controlling the rotation speed of the motor to a low speed until it reaches the upward opening position where the motor is advanced.

  The rotational speed control of the motor is provided with a torque detector that detects rotational torque applied to the panel rotation center axis, and the rotational speed of the motor is controlled based on the torque signal detected by the torque detector, or Variable speed control may be performed by sequence control.

  The control based on the torque signal detected by the torque detector is advantageous in that the rotation speed can be controlled regardless of the position of the opening / closing position of the panel. Further, when several panel opening / closing postures are determined, the panel rotation trajectory is clear and can be easily controlled by sequence control.

  Further, as a panel opening / closing mechanism, an arm drive is provided that includes an arm that is pivotally supported around an axis and an arm that pivotally supports a panel around a pivot axis of the panel at the distal end. A motor provided with a motor for driving, a panel driving motor for rotating the panel, and a control unit for controlling both driving motors can be exemplified.

  The controller that controls the drive of the two axes, when opening and closing the panel to a desired position, controls the panel drive motor and / or the arm drive motor according to the rotational torque applied to the panel rotation center axis. Drive control. As a result, the load on the motor can be reduced during the opening and closing operation of the panel, and the panel can be quickly opened and closed at a desired position.

  As described above, according to the present invention, during the opening / closing operation of the panel, when the rotation torque is high according to the rotation torque applied to the panel rotation central axis, the motor rotation speed is reduced to reduce the motor load. Since the rotational speed of the motor is increased when it is low, the panel can be quickly opened and closed at a desired position.

  Embodiments according to the present invention will be described with reference to the drawings. The indoor unit of the air conditioner in this embodiment is shown in FIGS. The indoor unit includes a heat exchanger 1 and an indoor fan 2, which are housed in a cabinet 3. The cabinet 3 is formed in a substantially rectangular parallelepiped box shape whose depth is longer than the height, and is a curved surface from the front surface to the bottom surface. A suction port 4 is formed on the upper surface of the cabinet 3, and a blowout port 5 is formed on the curved surface.

  An air passage 6 extending from the suction port 4 to the blowout port 5 is formed inside the cabinet 3, and the heat exchanger 1 and the indoor fan 2 are disposed in the air passage 6. The heat exchanger 1 is arranged in an inverted V shape in a side view. A filter 7 is disposed between the suction port 4 and the heat exchanger 1 to remove dust from the indoor air sucked from the suction port 4. A cleaning device 8 for cleaning the filter 7 is provided in the cabinet.

  The cleaning device 8 moves the filter 7 in the cabinet 3 to pass through the dust removing unit 9, and the dust removing unit 9 removes dust attached to the filter 7. A guide path 10 that is curved in a U shape in a side view is formed on the front side in the cabinet 3, and a moving unit including a motor and a gear reciprocates the filter 7 along the guide path 10. In the dust removing unit 9, the rotating brush 11 scrapes off dust from the filter 7 that passes therethrough, and a suction fan (not shown) causes air to flow substantially parallel to the filter 7 (in the left-right direction) and sucks the scraped dust. Discharge.

  An air guide panel 20 that opens and closes the outlet 5 is provided on the curved surface of the cabinet 3. The wind guide panel 20 is formed by a single curved panel and covers the front surface of the cabinet 3. The width of the wind guide panel 20 is the same as the width of the cabinet 3 and is formed larger than the width of the outlet 5. And the front panel 21 is formed in the front surface of the cabinet 3 so that it may become one step lower from the middle part of the front surface to the bottom surface. Thereby, a recessed part is formed in the whole width direction, and the wind guide panel 20 fits in this recessed part.

  An opening is formed in the front panel 21, and this opening serves as the outlet 5. When the wind guide panel 20 is fitted in the recess, the wind guide panel 20 is positioned in front of the outlet 5 and covers the outlet 5 and the front panel 21 around the outlet 5. That is, the wind guide panel 20 is formed larger than the outlet 5. In the state where the wind guide panel 20 is fitted in the concave portion, as shown in FIGS.

  As described above, the wind guide panel 20 is closed when the operation of the air conditioner is stopped. The air guide panel 20 closes the air outlet 5 and the arm entrances 21a formed on the left and right sides of the air guide panel 20 in the closed position so that the outer surface of the upper portion of the front surface of the cabinet 3 and the outer surface of the air guide panel 20 are flush with each other. Formed. Thereby, it is set as the structure where dust does not collect easily in the blower outlet 5 or the wind guide panel 20. FIG.

  The wind guide panel 20 and the cabinet 3 are made of the same material. Thereby, the wind guide panel 20 comprises a part of cabinet, and there exists a feeling of unity and high quality as a whole, and can provide the air conditioner excellent in the external appearance.

  The outer surface of the wind guide panel 20 forms a smooth curved surface extending from the front surface to the bottom surface of the cabinet 3 in the closed posture of the panel. Thereby, the wind guide panel 20 becomes a member constituting a part of the front surface of the cabinet 3. In other words, a part of the panel of the cabinet 3 is used as the wind guide panel 20. Thereby, the wind guide panel 20 turns into a long panel with a long full length compared with the louver employ | adopted as the conventional air conditioner.

  The air outlet 5 is provided with a wind direction plate 24 and an auxiliary louver (not shown). The wind direction plate 24 changes the wind direction in the left-right direction by changing the angle in the left-right direction. The auxiliary louver changes the vertical direction according to the posture of the wind guide panel 20 and changes the vertical direction while rectifying the blown wind.

  The heat insulating material 30 is mounted on the inner surface of the wind guide panel 20 over almost the entire surface. The inner surface of the heat insulating material 30 forms a curved surface so that the blown air can be smoothly guided. The width in the left-right direction of the heat insulating material 30 is made larger than the width of the outlet 5.

  The wind guide panel 20 is detachably attached to the cabinet 3 via the arm 12. The arm 12 can freely enter and exit from a vertically long arm entrance 21 a formed on both sides (right and left sides) of the outlet 5 of the front panel 21. As shown in FIGS. 9 to 15, the arm 12 is unitized and accommodated in the case 15. The case 15 has an opening 15 a on the front side, and is fixed in the cabinet 3 so that the opening 15 a faces the entrance 21 a of the front panel 21.

  The inner surface of the cabinet 3 is formed with a fitting portion (not shown) in which the case 15 can be fitted just in accordance with the outer shape of the case 15, and the cabinet 15 is simply fitted into the fitting portion. 3, the arm 12 and the drive unit can be positioned. After attaching the case 15 to the cabinet 3, it is only necessary to connect the lead wires of the arm driving motor 22 and the panel driving motor 27.

  The pair of left and right arms 12 are attached so that the base portion 12 b can rotate around a rotation shaft 18 formed in the case 15. That is, the arm base 12b is rotatably attached to the cabinet 3 inside the entrance / exit 21a, and the arm tip 12c rotates while the arm tip 12c draws an arc-shaped locus. The doorway 21a is provided so as to be able to enter and exit.

  The arm base 12b is disposed in the lower space inside the entrance / exit 21a, and the arm tip 12c is disposed in the upper space inside the entrance / exit 12a.

  The unit is provided with a drive unit that drives the arm 12. The drive unit includes an arm drive motor 22 attached to the case 15 and a power transmission mechanism that transmits the drive force of the arm drive motor 22 to the arm 12. The power transmission mechanism includes a rack 12a formed in an arc shape around the rotation shaft 18 at the rear end of the arm 12, and a pinion 19 that meshes with the rack 12a. The pinion 19 meshes with a gear 22 a fixed to the motor shaft of an arm driving motor 22 installed in the case 15.

  Further, each arm 12 is provided with a panel drive unit that rotates the wind guide panel 20 supported by the arm 12. The panel drive unit includes a panel drive motor 27 and a power transmission mechanism that transmits the rotational force of the motor 27 to the wind guide panel 20. The panel drive motor 27 and the power transmission mechanism for the panel are installed on the arm 12. That is, the power transmission mechanism for the panel includes a driving pulley 23 installed at the base of the arm 12, a driven pulley 16 installed at the arm tip side, and a timing stretched between the pulleys 23, 16. Belt 25.

  The outer shell of the arm 12 is composed of an arm main body 28 having a hollow structure, and the power transmission mechanism for driving the panel is accommodated in the arm main body 28 so as to be integrally rotatable with the driven pulley 16 and the pulley shaft. The wind guide panel 20 is connected.

  A pulley shaft of the driven pulley 16 is rotatably supported at the tip of the arm 12. The pulley shaft is formed in a cylindrical shape, and a spline hole 17 is formed on the inner peripheral surface of the pulley shaft for spline fitting with the spline shaft on the panel side. The driven pulley 16 is attached to the arm 12 so that the axial direction of the spline hole 17 is parallel to the panel left-right direction A.

  On the other hand, as shown in FIG. 16, spline shafts 13 and bearings 14 are provided on the left and right sides of the inner surface of the air guide panel 20 to connect to the tip of the arm 12. The spline shaft 13 passes through a spline hole 17 penetrating the arm 12 in the left-right direction, and engages with a bearing portion 14a of the bearing 14 facing in the left-right direction. Thereby, the pulley 16 and the wind guide panel 20 are connected by the spline shaft 13 so as to be integrally rotatable. In order to engage the spline shaft 13 and the bearing 14, a concave portion is formed at the center of the tip of the spline shaft 13, a convex portion is formed in the bearing portion 14a of the bearing 14, and the convex portion is inserted into the concave portion. is doing.

  The driving pulley 23 is disposed near the rotation shaft 18 of the arm 12. A tension roller 26 for adjusting the tension of the timing belt 25 is installed between the driven pulley 16 and the driving pulley 23. A gear 23 a is concentrically attached to the driving pulley 23 and meshes with a gear 27 a fixed to the motor shaft of the panel driving motor 27. In the present embodiment, stepping motors are used as the arm driving motor 22 and the panel driving motor 27.

  The panel drive motor 27 is installed on the outer surface of the arm body 28 at the base of the arm 12, and the motor shaft is introduced into the arm body 28. Therefore, when the arm 12 is rotated around the rotation shaft 18 by the arm driving motor 22, the panel driving motor 27 moves together with the arm 12.

  FIG. 17 is a control block diagram of the air conditioner. As shown in the figure, the control unit 41 is composed of a microcomputer. Various sensors 42, two position detection sensors 43 and 44, and a torque detection unit 45 are connected as main components on the input side of the control unit 41. In the present embodiment, the torque detector 45 is for detecting the rotational torque of the panel drive motor 27. In this torque detection, the motor current can be detected, or the rotational torque can be detected by a well-known method such as a strain gauge with respect to the rotation shaft of the motor shaft or other power transmission system. For example, although the rotation center axis of the wind guide panel 20 is the spline shaft 13, the rotational torque applied to this axis and the rotational torque applied to the pulley shaft of the timing belt may be detected.

  In addition to detecting the rotational torque for the panel drive motor 27, the arm drive motor 22 may be detected by detecting the rotational torque for the arm drive motor 22. In this case, in addition to detecting the rotational torque of the motor shaft of the arm driving motor 22, the torque of the rotating shaft in the rotating shaft 18 and other power transmission systems may be detected.

  Moreover, the arm drive motor 22, the panel drive motor 27, and the compressor of the refrigeration cycle 40 are connected as main output side components of the control unit.

  In the refrigeration cycle 40, the indoor unit heat exchanger 1 and an unillustrated outdoor unit compressor, four-way valve, and outdoor heat exchanger are connected by piping to form a circulation cycle. The control unit 41 controls the arm driving motor 22 and the panel driving motor 27 to rotate forward and backward according to the cooling / heating operation, and opens and closes the wind guide panel 20. As shown in FIGS. 14 and 15, the position detection sensor 43 is disposed in the case 15 so as to face the rear end portion of the arm 12, and is turned on when the arm 12 is in the case accommodation posture. 14 and 15, the tension roller 26 between the driven pulley 16 and the driving pulley 23 is omitted. Further, as shown in FIG. 2, the position detection sensor 44 is disposed at a step portion at the lower end of the front panel 21. The position detection sensors 43 and 44 are limit switches. Further, as one of various sensors, a non-contact optical sensor (not shown) is disposed in the vicinity of the position detection sensor 44, and the detection signal is controlled when the rear end of the wind guide panel 20 approaches the lower end of the front panel 21. The data is output to the unit 41.

  The control unit 41 controls the arm driving motor 22 and the panel driving motor 27 based on the detection signals of the various sensors 42, 43, 44 and the signal from the torque detecting unit 45, and controls the opening / closing of the air guide panel 20. . When the arm driving motor 22 is driven, the arm 12 rotates around the rotation shaft 18 with the rotation of the gear 19 and enters and exits from the entrance 21 a of the front panel 21. At the same time, the wind guide panel 20 is rotated around the spline shaft 13 by driving and controlling the panel drive motor 27.

  The opening / closing operation of the wind guide panel 20 is opened downward or upward according to various operation modes to change the blowing direction of the blown air. Specifically, during the cooling operation, the control unit 41 drives the arm driving motor 22 to open the arm 12 around the rotation shaft 18 as shown in FIG. 3 and FIG. Rotate clockwise. Thereby, the arm 12 is rotated until the tip is inclined downward.

  Here, when the air guide panel 20 is fixed and rotated around the rotation shaft 18 together with the arm 12, the rear end (lower end) of the air guide panel 20 comes into contact with the lower end of the front panel 21. Then, the panel drive motor 27 is driven in accordance with the rotation of the arm 12 so that the rear end (lower end) of the wind guide panel 20 and the lower end of the front panel 21 are not in contact with each other, and the spline shaft is driven. The wind guide panel 20 is rotated clockwise in FIG. Then, after the rotation of the arm 12 is completed, the air guide panel 20 is rotated counterclockwise in FIG. 4, and the rear end of the air guide panel 20 is brought into contact with the lower wall of the air outlet 5.

  Thus, the wind guide panel 20 opens downward during the cooling operation. In this downward opening posture, the rear end of the wind guide panel 20 is connected to (in contact with) the lower wall of the air outlet 5, and a long nozzle is formed by the air guide panel 20 and the upper wall of the air outlet 5. . The wind guide panel 20 guides the cool air obliquely upward, and the cool air blows out along the ceiling.

  During the heating operation (see FIGS. 5 and 6), the control unit 41 drives the arm driving motor 22 to rotate the arm 12 counterclockwise about the rotation shaft 18, and the wind guide panel. Rotating 20 clockwise about the shaft portion 13a of the spline shaft 13 is the same as in the cooling operation. However, during the heating operation, as shown in FIGS. 5 and 6, the arm 12 stops rotating when it faces the horizontal direction, and the wind guide panel 20 is moved until the outer surface of the wind guide panel 20 is obliquely upward. The turning point is different from the cooling operation.

  In this case, since the front end (upper end) approaches the upper part of the front panel 21 as the wind guide panel 20 rotates, the control unit 41 rotates the arm 12 and the wind guide panel 20 so that they do not contact each other. (The driving of the arm driving motor 22 and the panel driving motor 27) is controlled.

  Thus, the wind guide panel 20 opens upward at the time of heating operation. In this upward opening posture, the air guide panel 20 shields the front of the air outlet 5, suppresses the warm air blown forward, and guides the warm air toward the floor surface. Even at the initial stage of the cooling operation, the air guide panel 20 is in the upwardly open posture, and the cool air is blown out toward the floor surface to perform rapid cooling.

  Further, as shown in FIGS. 7 and 8, it is possible to rotate the air guide panel 20 from the upwardly opened posture until the outer surface of the panel faces upward without rotating the arm 12. By taking this maximum upward opening posture, it becomes possible to blow out conditioned air toward the front floor surface more than in the normal upward opening posture.

  In this case, a recess 21 b is formed in the front panel so that the front end of the wind guide panel 20 does not contact the front panel 21. Similarly, a recess 15 b is formed at a position corresponding to the case 15. Note that the wind guide panel 20 may be controlled to rotate in accordance with the rotation of the arm 12 when taking the maximum upward opening posture. When the operation is stopped, the air guide panel 20 is closed by performing an operation opposite to the operation of opening the air guide panel 20 and covers the air outlet 5 and is integrated with the cabinet 5 as shown in FIG.

  In the above panel opening / closing operation, the wind guide panel 20 is large, and the spline shaft 13 that is the rotation center axis of the wind guide panel 20 is biased toward the front side (upper end) of the wind guide panel 20. Rotational torque applied to the panel drive motor 27 fluctuates due to its own weight, and the motor load increases at a position where the rotational torque is high, and conversely, the motor load is reduced at a position where the rotational torque is low. In particular, in the upward opening operation of the wind guide panel 20, the rotation angle of the panel from the closing position of the panel to the upward opening position of the panel increases. Therefore, if the panel rotation time is long, the user is uncomfortable.

  Therefore, in the present embodiment, in the upward opening operation of the wind guide panel 20, the rotational speed of the panel drive motor 27 is reduced when the rotational torque is high in accordance with the rotational torque applied to the panel drive motor 27. When the rotational torque is low, the rotational speed of the panel drive motor 27 is controlled at a high speed. In the downward opening operation of the panel, since the rotation angle of the arm 12 is small and the rotation time of the air guide panel 20 is short, the variable speed control of the arm driving motor 22 is not performed.

  FIG. 18 is a side cross-sectional view in which the opening / closing operations from the closed position to the upward position of the panel are overwritten. In FIG. 18, the rotation range from the closed position of the wind guide panel 20 until the one end (lower end) of the wind guide panel 20 reaches the lowermost position (the panel is substantially vertical) is “open −1”. The rotation range from the position where one end (lower end) of the panel 20 is at the lowest end to the panel open position where the lower end of the wind guide panel 20 is most advanced is “open-2”, from the panel open position to the wind guide panel 20. The rotation range until the lower end of the windshield returns to the lowermost position is “closed-1”, and the rotation range until the lower end of the wind guide panel 20 returns from the lowermost position to the closed position is “closed-2”. .

  FIG. 19 is a graph showing the rotation speed of the panel drive motor in each posture of FIG. In the figure, the vertical axis represents the rotation speed, and the horizontal axis represents each rotation range shown in FIG. The rotation speed is represented by a relative ratio where the rotation speed of the conventional panel drive motor is “1”. The speed in the opening direction of the panel is positive, and the speed in the closing direction is negative.

  As shown in FIGS. 18 and 19, when the rotation range of the wind guide panel 20 is “open-1”, the weight of the wind guide panel 20 is applied in the rotation direction of the wind guide panel 20. Therefore, since the motor load is reduced, the rotational speed is increased and the wind guide panel 20 is moved quickly.

  When the rotation range of the wind guide panel 20 is “open-2”, the weight of the wind guide panel 20 is applied in a direction opposite to the rotation direction of the wind guide panel 20. As a result, the motor load increases, and the rotational speed is reduced.

  When the rotation range of the wind guide panel 20 is “closed−1”, the weight of the wind guide panel 20 is added to the rotation direction (return direction) of the wind guide panel 20. Therefore, since the motor load is reduced, the rotational speed is increased and the wind guide panel 20 is quickly moved to the vertical state.

  When the rotation range of the wind guide panel 20 is “closed-2”, the weight of the wind guide panel 20 is applied in the direction opposite to the rotation direction of the wind guide panel 20. As a result, the motor load increases, and the rotational speed is reduced.

  Conventionally, the relative speed “1” shown in FIG. 19 is used regardless of the position of the panel. However, in this embodiment, in consideration of the gravity of the wind guide panel 20, when the wind guide panel 20 is rotated downward, the wind guide panel 20 is moved at a speed 1.5 times higher than the conventional speed “1”. When turning 20 upward, the conventional speed is “1”.

  Here, the relative speed “1” is set to a maximum speed at which a torque necessary to raise the wind guide panel against gravity is set. When the wind guide panel 20 is lowered, the relative speed is set as described above. If it is faster than “1” (for example, relative speed “1.5”), the wind guide panel 20 can be moved most quickly when the motor is used.

  Thus, during the opening / closing operation of the wind guide panel 20, when the rotational torque is high according to the rotational torque applied to the panel drive motor 27, the motor rotational speed is reduced to reduce the motor load, and when the rotational torque is low Since the rotation speed of the motor is increased, the panel can be quickly opened and closed at a desired position.

  As for the downward opening operation of the air guide panel 20, the vertical rotation operation of the arm 12 is the main operation and the rotation angle of the arm is small, so that the variable speed control of the panel drive motor 27 and the arm drive motor 22 is performed. However, these motors may be controlled at a variable speed in consideration of the weight of the panel. In this case, since the vertical rotation operation of the arm 12 is the main operation, the arm driving motor 22 may be controlled at a variable speed according to the weight of the panel.

  In the above embodiment, the motor control is performed by detecting the rotational torque of the panel drive motor 27. However, as described above, the rotational torque of the arm drive motor 22 is also detected and the arm is lowered. Control may be performed such that the motor rotation speed is increased and the motor rotation speed is decreased when the arm is raised. Moreover, you may make it control only one of these two motors, or both. Furthermore, in the above-described embodiment, the rotational torque of the motor is detected and controlled, but it goes without saying that the rotational speed of the motor may be sequence-controlled instead.

1 is an external perspective view showing an indoor unit of an air conditioner according to the present invention. Side sectional view of the indoor unit of FIG. FIG. 1 is an external perspective view showing a state where the wind guide panel is opened downward. Side view of the indoor unit of FIG. FIG. 1 is an external perspective view showing a state where the wind guide panel is opened upward. Side view of the indoor unit of FIG. FIG. 5 is an external perspective view showing a state where the wind guide panel is further rotated. Side view of the indoor unit of FIG. The perspective view which shows the positional relationship of a wind guide panel and a case in the closed state External perspective view of the case The perspective view which shows the state which removed the one side of the case from FIG. The perspective view which shows the state which removed the motor from FIG. The perspective view which shows the state which removed the half of the cover body from FIG. Side view of FIG. The side view which shows the state which the arm rotated in FIG. Perspective view showing a wind guide panel Air conditioner control block diagram Side cross-sectional view overwriting the opening and closing operations from the closed position of the panel to the open position The graph which shows the rotational speed of the panel drive motor in each attitude | position of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat exchanger 2 Indoor fan 3 Cabinet 4 Suction inlet 5 Outlet 6 Air passage 12 Arm 12a Rack 13 Spline shaft 14 Bearing 15 Case 15a Opening 15b Recess 16 Pulley 17 Spline hole 18 Rotating shaft 19 Pinion 20 Wind guide panel 21 Front Panel 21a Entrance / exit 21b Recess 22 Drive motor 23 Drive pulley 23a Gear 24 Wind direction plate 25 Belt 26 Tension roller 27 Rotating motor 29 Gear 30 Heat insulating material 40 Refrigerating cycle 41 Control unit 42 Sensor 43, 44 Position detection sensor 45 Torque detection unit

Claims (7)

  A panel disposed at the outlet of the cabinet; a panel opening / closing mechanism having a motor for opening / closing the panel; and a control unit for controlling the panel opening / closing mechanism. The control unit is provided on either side of the vertical direction, and the controller reduces the motor rotation speed when the rotation torque is high according to the rotation torque applied to the panel rotation center axis during the panel opening / closing operation. An air conditioner that controls the rotational speed of the motor at a high speed when the rotational torque is low.   2. The control unit according to claim 1, wherein when the panel's own weight is applied to the opposite side of the rotation direction, the motor rotation speed is reduced, and when the panel's own weight is applied in the rotation direction, the motor rotation speed is controlled at a high speed. Air conditioner as described in.   The controller controls the rotation of the motor at a maximum speed at which a torque necessary to raise the panel against gravity can be obtained when raising the panel in a direction opposite to the direction in which the weight of the panel is applied, The air conditioner according to claim 1, wherein when the weight of the panel is applied in the rotation direction, the motor rotation speed is controlled to be higher than the speed.   The pivot center axis is disposed on the upper end side of the panel, and the lower end of the panel is retracted from the pivot center axis to cover the outlet, and the lower end of the panel is advanced from the pivot center axis. The controller can rotate freely between the open position and the control unit increases the motor rotation speed from the panel close position to the position where the lower end of the panel is the lowest position, and the panel open position from the lowest position of the panel 2. The air conditioner according to claim 1, wherein the rotation speed of the motor is controlled to a low speed until reaching the point.   A torque detector for detecting a rotational torque applied to the panel rotation center axis is provided, and the controller controls the rotational speed of the motor based on a torque signal detected by the torque detector. The air conditioner according to claim 1.   2. The air conditioner according to claim 1, wherein the controller controls the rotation speed of the motor in sequence during the opening / closing operation of the panel. The panel opening / closing mechanism includes an arm that is supported so that a base end of the arm is rotatable about an axis, and an arm that rotatably supports a panel around a center axis of the panel rotation. A motor for driving, a panel driving motor for rotating the panel, and a controller for controlling both driving motors,
The control unit drives and controls the panel driving motor and / or the arm driving motor according to a rotational torque applied to the panel rotation central axis when the panel is opened and closed at a desired position. The air conditioner according to claim 1.

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