JP4965618B2 - Air direction change device for air conditioner - Google Patents

Description

  The present invention relates to an air conditioner including a wind direction changing device that changes a wind direction blown out from an outlet of a cabinet.

  In the air conditioner, when the air direction of the air passage is controlled, the air guide panel that opens and closes the front opening of the cabinet and the auxiliary louver disposed in the vicinity of the rear outlet are controlled. However, since the wind guide panel and the auxiliary louver are each arranged in the vicinity of the air outlet and are controlled by a single unit, the air blowing performance depends on the length of the auxiliary louver and the wind guide panel, In an air conditioner that aims to be compact and reduce costs, it has been difficult to improve the air blowing performance by assembling both at the same time.

  For this reason, as another method, in order to improve the blowing performance using either one of the panel structure or the auxiliary louver, the size (depth length) of the auxiliary louver (lateral louver) is increased to improve the blowing performance. Although it is conceivable to improve, the lateral louver that freely changes the direction of the wind at the air outlet part has a longer louver depth because the air blowing performance depends on the rotation angle, louver shape, and operating torque. There are restrictions on doing this, and there is a risk of increasing costs.

  In Patent Document 2, a horizontal blade corresponding to a horizontal louver and an auxiliary plate on the back side thereof are used, and the air passing between the auxiliary plate and the guide plate on the back side of the air passage is guided along the guide plate, There has been disclosed an air conditioner that can discharge air along the guide plate even if the guide plate is shorter than the conventional one.

JP 2008-138892 A Japanese Utility Model No. 61-29221 Microfilm

  However, Patent Document 2 only improves the air blowing structure between the auxiliary plate and the guide plate, and does not contribute to the improvement of the air blowing performance of blowing air far away by the horizontal blade (lateral louver).

  In view of the above, an object of the present invention is to provide a wind direction changing device for an air conditioner that can improve the blowing performance without increasing the shape of the lateral louver.

In order to achieve the above object, a wind direction changing device for an air conditioner according to the present invention is disposed in a heat exchanger disposed in an air passage in a cabinet, and on the downstream side of the air passage from the heat exchanger. A fan, a blower outlet formed in the front surface of the air passage, a horizontal louver provided on the front side of the blower outlet so as to be rotatable around a rotary shaft, and a horizontal louver. A control unit that drives and controls the front of the outlet so as to rotate freely and changes the blowing direction of the wind sent from the fan, and is disposed at the outlet on the rear side of the lateral louver and is located behind the air passage. A rectifying plate that rectifies the wind from the fan, a drain pan having an open U-shaped cross section is disposed below the heat exchanger, and a rear wall surface and a bottom wall surface of the drain pan are downstream of the fan of the air passage. A part of the air guide wall on the side Form, the rectifying plate, the front end is arranged opposite to the lower nose portion is a corner portion between the wall and the bottom wall after said drain pan, the rear end is arranged in the fan near the lateral louvers 1 It is composed of a single plate, and is arranged so as to close the front opening of the cabinet in its closed position, and is formed in a curved shape that matches the curved shape of the front opening of the cabinet, and its inner surface side is a concave curved surface. The control unit is configured so that in the upward blowing posture of the horizontal louver, the inner surface of the horizontal louver and the upper surface of the rectifying plate are cooperated so that the air flows longer than the depth length of the horizontal louver alone. In order to form the guide path, control is performed to bring the lower end of the lateral louver close to the front end of the current plate.

In the above configuration, the control unit controls the rotation of the lateral louver. In the control unit, in blowing on the horizontal louver orientation, with the inner surface of the lateral louver and it is continuously both in cooperation with the upper surface of the rectifying plate, rectifying the lower end of the lateral louvers so as to form one of the air guide path Control to bring it close to the front edge of the plate . At this time, the horizontal louver and the current plate are integrated in a pseudo manner to form a ventilation guide path longer than the ventilation guide path of the horizontal louver alone. Therefore, the air blowing performance is improved by the combination of the existing rectifying plate and the horizontal louver.

  Thus, without increasing the number of members, and without increasing the length of the horizontal louver unit, that is, without increasing the length of the horizontal louver plate surface direction orthogonal to the left-right direction, while improving the blowing performance, It is possible to provide a blower outlet structure that is compact and can be reduced in cost.

Here, the horizontal louver is composed of a single plate material, and is disposed so as to close the front opening of the cabinet in the closed position, and is formed in a curved shape matching the curved shape of the front opening of the cabinet. Thereby, a blower outlet is obstruct | occluded with a horizontal louver, and a part of external appearance of a cabinet can be comprised.

The horizontal louvers, a closed position for closing the opening of the cabinet, cooperate one blowing guided by continuously both by the inner surface of the lateral louvers is rotated louver lower end to the rectifier plate side and the upper surface of the current plate It is possible to adopt an upper blowing posture that forms a path and a lower blowing posture that exposes the lower end of the louver to the outside of the cabinet and guides the wind blown from the blower outlet downward. The horizontal louver is rotatable between an upper blowing posture and a lower blowing posture. A closed posture for closing the opening of the cabinet exists between the upper blowing posture and the lower blowing posture of the horizontal louver.

Position of the rotation axis of the lateral louvers may be near the top end position.

  Further, the horizontal louver is formed in such a manner that the inner louver has a concave curved surface in the upper blowing posture, and the louver guide path is longer than the depth length of the horizontal louver alone in cooperation with the rectifying plate arranged on the rear side. Can be formed. Since the inner surface side of the horizontal louver has a concave curved surface, the air blowing guide path can blow the wind blown from the blower outlet diagonally upward and far along the concave curved surface.

In addition, the rectifying plate is disposed at a substantially intermediate position in the vertical direction of the air outlet, and rectifies the turbulent flow that occurs at the lower end of the nose and blows it forward. It can also be formed in a flat cross-sectional ellipse shape by the long axis. Thereby, the baffle plate can rectify the turbulent flow that occurs at the lower end of the nose and blow the wind from the fan forward.

As described above, according to the present invention, in blow on the lateral louvers orientation, in cooperation with the upper surface of the inner surface and the integer Nagareban lateral louvers is sequencing both to form a single blast guideway Since the control is performed to bring the lower end of the horizontal louver close to the front end of the rectifying plate , the horizontal louver and the rectifying plate are integrated in a pseudo manner to form a blowing guide path longer than the blowing guide path of the single horizontal louver. Thus, it is possible to provide a blower structure that is compact and can be reduced in cost while improving the blower performance by the combination of the existing current plate and the horizontal louver.

It is an external appearance perspective view of the indoor unit of the air conditioner in this embodiment. It is side surface sectional drawing which shows the closed attitude | position of a horizontal louver in the indoor unit of FIG. Is a side sectional view showing the blow out position on the horizontal louvers in FIG. Is a side sectional view showing the lower blow out position of the horizontal louvers in FIG. It is side surface sectional drawing which shows the rotation state of a horizontal louver in FIG. It is a control block diagram of the louver and fan of the indoor unit shown in FIG. It is a control flowchart of the louver and fan of the indoor unit shown in FIG.

  Embodiments according to the present invention will be described with reference to the drawings. In the present embodiment, an example of an indoor unit of a separate type air conditioner that is an example of an air conditioner will be described. This type of air conditioner includes a heat exchanger housed in an indoor unit, and a compressor, a four-way valve, an outdoor heat exchanger, and a throttle device (both not shown) housed in an outdoor unit (not shown). The refrigerant pipes are connected to form a refrigeration cycle, and various operation modes such as cooling, heating, and dehumidification can be executed.

  As shown in FIG. 2, in the indoor unit, a suction port 2 for sucking room air is formed on the upper surface of the cabinet 1, and an outlet 4 is formed in an opening 3 below the front surface of the cabinet 1. An air passage 5 extending from the suction port 2 to the blowout port 4 is formed inside the cabinet 1, and a heat exchanger 6 and a fan 7 are disposed in the air passage 5.

  As shown in FIG. 1, the cabinet 1 forms an exterior by combining a back plate 8, a left cover 9, a right cover 10, a front panel 11, and a louver unit 12.

  A grill 13 is provided on the front side of the suction port 2, and a filter 14 is disposed on the back side of the suction port 2. The filter 14 can be taken out from the front side by opening the front panel 11. The heat exchanger 6 is arranged in an inverted V shape on the suction port side of the air passage 5. An open U-shaped drain pan 15 is disposed below the front heat exchanger 6a of the inverted V-shaped heat exchanger.

  The fan 7 is disposed downstream of the heat exchanger 6 in the air passage 5. The fan 7 is a cross flow fan, and is disposed so as to be surrounded by the inverted V-shaped heat exchanger 6.

  In the air passage 5, on the downstream side of the fan 7, air blowing guide walls are formed on both front and rear sides, and the air blown from the fan 7 is guided from the blowout port 4 to the front opening of the cabinet 1. In the air passage 5, the front air guide wall is constituted by a rear wall surface 15 a and a bottom wall surface 15 b of the drain pan 15. The rear air guide wall is composed of a rear guide wall 16 formed on the front side of the back plate 8 of the cabinet 1. The rear guide wall 16 is formed in a concave curved surface so as to guide the air blown from the fan 7 forward. The fan 7 is disposed with a gap between the rear wall surface 15a of the drain pan 15 and the rear guide wall 16 on the back plate 8 side.

  The louver unit 12 constitutes a part of the wind direction changing device. The louver unit 12 is arranged in the blower outlet 4 on the rear side of the lateral louver 18, a peripheral member 17 that forms the blower outlet 4 in the center, a horizontal louver 18 that is rotatably provided in front of the blower outlet 4. A rectifying plate 19 that rectifies the wind from the fan 7 and a plurality of vertical louvers 20 that are swingably disposed behind the horizontal louver 18 are provided.

  In the peripheral member 17, a lower member 21 that supports the vertical louver 20 in a swingable manner, left and right side plates 22, and an upper member are integrally formed in a frame shape, and the air outlet 4 is formed in the center. The upper member is constituted by a drain pan 15, and the bottom wall surface 15 b of the drain pan 15 constitutes the upper mouth wall surface of the outlet 4.

  The lower member 21 constitutes the lower exterior of the cabinet 1, and its rear end portion is locked to the front side portion of the back plate 8, and the peripheral member 17 is fixed to the back plate 8 with screws. The upper surface of the lower member 21 is a blast guide surface 21 a that gently slopes downward and continues to the rear guide wall 16 of the back plate 8.

  A plurality of vertical louvers 20 are swingably provided on the air guide surface 21a, and the wind from the fan 15 is changed in the left-right direction. Each vertical louver 20 is formed in a plate shape, and an intermediate portion is formed thin in the front-rear direction so as to be swingable in the left-right direction. A rear end portion of each vertical louver 20 is detachably engaged with an engaging portion formed on the lower member 21 from the rear. The front end portion of each vertical louver 20 is for changing the wind direction, and the angle can be changed in the left-right direction by an intermediate thin portion.

  The plurality of vertical louvers 20 are connected in the left-right direction by a connecting rod 25 in the left-right direction connected to the front end, and although not shown, the plurality of vertical louvers 20 are connected by a vertical louver motor 23 (see FIG. 6) connected to one end of the connecting rod 25. The vertical louver 20 swings in conjunction with the left-right direction.

  The rectifying plate 19 is disposed at a substantially intermediate position in the vertical direction of the air outlet 4, above the vertical louver 20, and opposed to the lower end nose tip 15 c that is a corner between the rear wall surface 15 a and the bottom wall surface 15 b of the drain pan 15. Has been. The rectifying plate 19 has a flat cross-sectional ellipse formed by a short axis in the longitudinal direction and a long axis in the front-rear direction so as to rectify the turbulent flow generated in the lower end nose tip 15c of the drain pan 15 and blow it forward. Is formed. The current plate 19 is passed between the left and right side plates 22 of the peripheral member 17. The rectifying plate 19 has a function of preventing the user's fingertip from entering the air outlet 4 and contacting the fan 7 together with the rectifying action.

  The horizontal louver 18 is composed of a single horizontal louver, and both left and right end portions of the horizontal louver 18 are pivotally supported on the side plate 22 of the peripheral member 17 so as to be rotatable around a rotation shaft 26 whose axial direction is the left-right direction. ing. It is driven by a lateral louver motor 24 (see FIG. 6) connected to the rotating shaft 26. In this example, the rotation shaft 26 of the horizontal louver 18 is located at the upper end of the horizontal louver 18. When the horizontal louver 18 rotates, the bottom wall surface 15b of the drain pan 15 is formed in a concave shape in order to prevent the upper end of the horizontal louver 18 from colliding with the bottom wall surface 15b of the drain pan 15 to restrict the rotation. .

  The horizontal louver 18 is disposed so as to cover the front opening 3 of the cabinet 1 in the closed posture, and is formed in a curved shape matching the curved shape of the front opening 3 of the cabinet 1. Therefore, in the closed posture of the horizontal louver 18, the air outlet 4 is almost closed by the horizontal louver 18, and the surface side 18 a of the horizontal louver 18 constitutes a part of the appearance of the cabinet 1.

  The inner surface (back surface) shape of the horizontal louver 18 is also formed in a curved surface shape in accordance with the front surface side shape. That is, the horizontal louver 18 is formed in a bow shape when viewed from the side, and its inner surface side (back surface side) is a concave curved surface. And the horizontal louver 18 is the upper blowing attitude | position A, and the ventilation guide path longer than the depth length of a horizontal louver single-piece | unit is formed in cooperation with the baffle plate 19 located in the rear side.

  Further, the horizontal louver 18 closes the opening 3 of the cabinet 1, and the lower end 18 c of the horizontal louver 18 rotates to the rectifying plate 19 side to turn the upper surface (back surface) 18 b of the horizontal louver 18 and the upper surface of the rectifying plate 19. The upper blow-off posture A, which forms a single air guide path in cooperation with 19a, and the lower end 18c of the horizontal louver 18 are rotated to the outside of the cabinet 1 so that the air blown from the blow-out port 4 is blown out. A lower blowing posture C that leads downward can be taken.

  That is, the horizontal louver 18 is rotatable between the upper blowing posture A and the lower blowing posture C. A closed posture B that closes the opening 3 of the cabinet 1 exists in the middle of the turning trajectory between the upper blowing posture A and the lower blowing posture C of the horizontal louver 18.

  Moreover, the control part 30 which drives and controls the horizontal louver 18 rotatably in the front surface of the blower outlet 4, and changes the blowing direction of the ventilation from the fan 7 is provided. As shown in FIG. 6, the control unit 30 includes a microcomputer, and an operation unit 31 provided on the remote controller or the like on the input side and a louver position detection unit 32 that detects the position of the lateral louver 18 are connected. A lateral louver motor 24, a vertical louver motor 23, and a fan motor 33 are connected to the output side of the control unit 30.

  In the control unit 30, operation start and operation mode switching are performed by a command signal from an operation unit 31 mounted on a remote controller or the like. For example, when a command signal for the heating operation mode is input from the operation unit 31, the control unit 30 drives and controls the horizontal louver motor 24 to rotate the horizontal louver 18 from the closed posture B to the lower blowing posture C. In addition, when a command signal for the cooling operation mode is input from the operation unit 31, the lateral louver motor 24 is driven and controlled to rotate the lateral louver 18 from the closed posture to the upper blowing posture A. In addition, switching from the upper blowing posture A to the lower blowing posture C or switching from the lower blowing posture C to the upper blowing posture A is performed depending on each operation mode. For example, the horizontal louver 18 is blown to the floor side with the wind from the fan 7 in the lower blowing posture C to quickly cool the floor side locally, and then switched from the lower blowing posture C to the upper blowing posture A, There is also an operation mode in which the cool air from the fan 7 is discharged far away toward the ceiling.

  The louver position detection unit 32 is for detecting the attitude of the lateral louver 18 and can be constituted by a microswitch or an optical sensor arranged on the peripheral member 17 corresponding to each attitude A, B, C. . Alternatively, when the lateral louver motor 24 is a stepping motor, a configuration in which the position of the lateral louver 18 is detected by calculating from a pulse signal applied to the lateral louver motor 24 can be employed.

  The control unit 30 can stop the horizontal louver 18 at the positions of the upper blowing posture A, the closed posture B, and the lower blowing posture C in response to a signal from the louver position detection unit 32. In particular, the control unit 30 causes the air blowing guide path to be longer than the depth length of the horizontal louver alone by the cooperation of the upper surface (inner surface 18b) of the horizontal louver 18 and the upper surface 19a of the rectifying plate 19 in the upper blowing posture A of the horizontal louver 18. The rotational posture (upper blowing posture) of the lateral louver 18 is controlled so as to form

  Further, the control unit 30 can control the rotational speed of the fan motor 33 by a command signal from the operation unit 31 or a temperature signal from a temperature sensor (not shown) to control the air volume of the fan 7.

  Further, the control unit 30 also controls the rotational speed of the fan motor 33 according to the rotational state of the lateral louver 18. That is, when the lateral louver 18 is switched from the lower blowing posture C or the upper blowing posture A to the closed posture B, the fan motor 33 is controlled to be slow or stopped. In the closed posture B of the horizontal louver 18, as shown in FIG. 2, the opening of the cabinet 1 is almost closed, so that when the fan motor 33 is operated normally in this state, the load applied to the fan 7 Becomes lighter. Then, since the rotation speed of the fan 7 increases, it may cause abnormal noise. Therefore, the control unit 30 controls the fan 7 to stop when the lateral louver 18 shifts to the closed posture B.

  Further, when the horizontal louver 18 shifts to the closed posture B by switching from the upper blowing posture A to the lower blowing posture C, or conversely, the lateral louver 18 is switched by switching from the lower blowing posture C to the upper blowing posture A. When shifting to the closed posture B, the control unit 30 receives a signal from the louver position detection unit 32, and controls the fan 7 to stop or switch to low speed operation as the horizontal louver 18 approaches the closed posture B. When the opening 3 is opened so that 18 passes through the closed posture B and shifts to the upper blowing posture A or the lower blowing posture C, control is performed to increase the rotational speed of the fan 7 again. As a result, the load applied to the fan 7 becomes lighter as the closed posture B is approached, and noise can be prevented from being generated by increasing the rotational speed of the fan 7, and air blowing is resumed when the opening 3 is open. Therefore, a comfortable driving state can be obtained.

That is, the control unit 30 monitors the posture of the horizontal louver 18 by a signal from the louver position detection unit 32, and controls the fan motor 33 to stop or drive at a low speed when the horizontal louver 18 switches to the closed posture. . The control unit 30, when Setsu換Ru on blown out position A or the lower blowing out position C lateral louver 18 from closed position, to drive the original rotational speed is gradually increasing the rotation speed of the fan motor 33 controlled To do.

  Further, the control unit 30 also controls the rotational speed of the lateral louver motor 24 so that the lateral louver 18 is rotated at different rotational speeds when switching from the upper blowing posture A to the closed posture B and when switching from the lower blowing posture C to the closed posture B. The rotation speed is controlled.

  This is because the rotational angle from the upper blowing posture A to the closed posture B of the horizontal louver 18 is smaller than the rotational angle from the lower blowing posture C to the closed posture B. That is, since the opening 3 of the cabinet 1 is formed obliquely downward in the lower front portion of the cabinet, the closed posture B of the lateral louver 18 is in a state where the lower end 18c is inclined to the outlet side from the vertical direction. On the other hand, the lower blowing posture C of the horizontal louver 18 is a state in which the lower end 18c is opened forward from the vertical direction. On the other hand, the upper blowing posture A of the horizontal louver 18 is a state in which the lower end 18 c is close to the rectifying plate 19.

  Therefore, the rotation angle from the closed posture B to the upper blowing posture A of the lateral louver 18 is smaller than the rotation angle to the lower blowing posture C. Therefore, if switching to a posture with a different rotation angle is performed at the same speed, the transition time from the closed posture B to the upper blowing posture A is shorter than the transition time from the closed posture B to the lower blowing posture C. There is a possibility that the rotational speed control (stop control) that slows down the rotation of the fan motor 33 during the transition from the posture A to the closed posture B cannot catch up with the rotational speed of the lateral louver 18.

  Therefore, in the control unit 30, the rotational speed of the lateral louver motor 24 is slower in the transition from the upper blowing posture A to the closed posture B of the lateral louver 18 than in the transition from the lower blowing posture C to the closed posture B. In the closed posture B, the fan motor 33 is controlled to be surely stopped or driven at a low speed. In other words, the lateral louver 18 having a smaller rotational angle between the rotational angle from the upper blowing posture A to the closed posture B and the rotational angle from the lower blowing posture C to the closed posture B. In the rotation switching operation, the rotational speed of the lateral louver motor 24 is controlled to be slowed down, and the rotational speed control for slowing down the rotational speed of the fan motor 33 catches up with the rotational switching operation of the lateral louver 18. . As a result, the load applied to the fan 7 becomes lighter as it approaches the closed posture B, and it is possible to prevent the generation of abnormal noise caused by the increase in the rotational speed of the fan 7.

  In the above configuration, when the indoor unit is stopped, the lateral louver 18 is in a closed posture B in which the front opening 3 of the cabinet 1 is substantially closed as shown in FIG. Here, when an operation command, for example, a cooling operation command is output from the operation unit 31, the control unit 30 receives the signal to drive the refrigeration cycle, and the lateral louver 18 is blown upward from the closed posture B. Switching to the posture A (see FIG. 3), the fan motor 33 is driven and controlled. As a result, the fan 7 rotates and the air is blown forward from the air outlet 4 through the air passage 5.

  In the upper blowing posture A of the horizontal louver 18, the inner surface 18b of the horizontal louver 18 and the upper surface 19a of the rectifying plate 19 are combined in a pseudo manner so that they are substantially continuous. Form. That is, since the ventilation guide path becomes a ventilation guide path longer than the ventilation guide path of a single horizontal louver in the front-rear direction, it is possible to send the wind far and improve the ventilation performance.

  In this case, the combination of the existing lateral louver 18 and the rectifying plate 19 forms a long air guide path in the front-rear direction, so the depth of the lateral louver alone is increased, or another air guide member is added. Compared to the case, it is possible to reduce the number of parts and make the system compact, and to reduce the cost.

  At this time, since the inner surface side of the horizontal louver 18 has a concave curved surface, the air blowing guide path discharges the wind blown from the outlet 4 obliquely upward (toward the ceiling) along the concave curved surface. Can send wind up to.

  On the other hand, for example, when a heating operation command is output from the operation unit 31, the control unit 30 receives the signal, drives the refrigeration cycle, and blows down the lateral louver 18 from the closed posture B when predetermined conditions are satisfied. The lateral louver motor 24 and the fan motor 33 are driven and controlled to switch to the posture C (see FIG. 4).

  When the fan 7 is driven, the air is blown forward from the air outlet 4 through the air blowing guide path. This wind hits the inner surface 18b of the horizontal louver 18 located in the front opening 3 of the cabinet 1, is guided downward, and enters a lower blowing state.

  In a blowing state such as heating or cooling operation, when the control unit 30 receives a wind direction change command from the operation unit 31, the control unit 30 drives and controls the vertical louver motor 23, and swings the vertical louver 20. Change the airflow from the left and right.

  FIG. 7 is a control flowchart of the louver and the fan. In this flowchart, the louver means the lateral louver 18 and the louver motor means the lateral louver motor 24. In this example, the louver switching operation from the upper blowing posture A to the lower blowing posture C and the switching operation from the lower blowing posture C to the upper blowing posture A will be described in an easy-to-understand manner. Switching operation from A or lower blowing posture C to closed posture B (step 11 (S11) to step 16 (S16)) and switching operation from closed posture B to upper blowing posture A or lower blowing posture C (step 17 ( S17) to Step 20 (S20)) will be described separately.

  The switching operation from the closed posture B to the upper blowing posture A or the lower blowing posture C is an operation flow from step 17 (S17) to step 20 (S20). Moreover, since various modes can be considered for the switching operation of the horizontal louver 18 during the cooling operation and the heating operation, the switching operation of the horizontal louver motor 24 and the fan motor 33 is limited to each other without mentioning each operation mode. The control method will be described.

  First, it is determined whether or not a switching command signal for the horizontal louver 18 has been input after the start of operation (S10). If a switching command signal has been input, the process proceeds to step 11 (S11). Otherwise, the process waits until a switching command signal is input. In step 11, it is determined whether or not the switching command signal is a switching command from the upper blowing posture A to the closing posture B (including a switching command from the upper blowing posture A to the lower blowing posture C). At the time of switching command to the posture B, the lateral louver 18 is switched from the upper blowing posture A to the closed posture B while driving the louver motor 24 at a lower speed than the normal speed (S12), and the fan motor 33 closes the lateral louver 18 Make sure to stop in the posture or drive at a predetermined low speed.

  When the switching command signal is a switching command from the lower blowing posture C to the closing posture B (including a switching command from the lower blowing posture C to the upper blowing posture A) (S13: Yes), the lateral louver motor 24 is controlled at a normal speed. Then, it is determined whether or not the horizontal louver 18 has shifted to the closed posture B (S15). When the horizontal louver 18 is switched to the closed posture, the fan motor 33 and the horizontal louver motor 24 are temporarily stopped (S16).

  Then, it is further determined whether or not a louver open command signal is input (S17). In this case, in the case of a switching command from the upper blowing posture A to the closing posture B or a switching command from the lower blowing posture C to the closing posture B, the lateral louver 18 maintains the closed posture, so the opening command signal is It is not entered. Thus, when the open command signal is not input (S17: No), it ends as it is.

  When the opening command signal is input (S17: Yes), the lateral louver motor 24 and the fan motor 33 are re-driven at normal speed (S18), and the specified posture (upper blowing posture A or lower blowing posture C) is obtained. The lateral louver motor 24 is stopped (S20).

  Here, the opening command signal includes a command signal for switching from the closed posture B to the upper blowing posture A or the lower blowing posture C, a louver switching command signal from the upper blowing posture A to the lower blowing posture C, or A switching command signal from the lower blowing posture C to the upper blowing posture A is included. When a louver switching command signal from the upper blowing posture A to the lower blowing posture C or a switching command signal from the lower blowing posture C to the upper blowing posture A is input, the control unit 30 sends these command signals to the storage unit. Are stored and used as an open command signal in step 17 (S17) to determine “there is a louver open command”.

  In this way, when the horizontal louver 18 is switched to the closed posture B, it is possible to prevent abnormal noise from being generated by reliably stopping the blowing or operating at a low speed, and the horizontal louver 18 rotates. Since ventilation is resumed when the opening 3 is open, a comfortable driving state can be obtained.

  Further, in the control unit 30, the rotational speed of the lateral louver motor 24 is slower at the time of transition from the upper blowing posture A to the closed posture B of the horizontal louver 18 than at the time of transition from the lower blowing posture C to the closed posture B. Since the fan motor 33 is controlled to be surely stopped or driven at a low speed in the closed posture B, it is possible to prevent the generation of abnormal noise.

  In the above embodiment, the air direction changing device in the indoor unit of the air conditioner provided with the refrigeration cycle is exemplified, but other air conditioners having a fan and an outlet, such as an air purifier, a dehumidifier, a humidifier, and a refrigerator. Of course, the present invention can also be applied to apparatuses.

DESCRIPTION OF SYMBOLS 1 Cabinet 2 Air inlet 3 Cabinet opening 4 Air outlet 5 Air passage 6 Heat exchanger 7 Fan 8 Back plate 9 Left cover 10 Right cover 11 Front panel 12 Louver unit 13 Grill 14 Filter 15 Drain pan 15a Drain pan rear wall 15b Drain pan Bottom wall surface 15c Drain pan nose tip 16 Rear guide wall of rear plate 17 Peripheral member 18 Horizontal louver 18a Surface of horizontal louver 18b Back surface of horizontal louver 18c Lower end of horizontal louver 19 Current plate 19a Surface of current plate 20 Vertical louver 21 Lower member 22 Side plate 23 Vertical louver motor 24 Horizontal louver motor 25 Connecting rod 26 Rotating shaft 30 Control unit 31 Operation unit 32 Louver position detection unit 33 Fan motor

Claims (2)

A heat exchanger disposed in an air passage in the cabinet, a fan disposed on the downstream side of the air passage from the heat exchanger, an air outlet formed in a front surface of the air passage, and the air outlet A horizontal louver provided on the front side at the upper end portion so as to be rotatable around a rotation shaft, and a blowing direction of the wind sent from the fan by controlling the horizontal louver to be rotatable at the front surface of the outlet. A control unit that changes the air flow rate, and a rectifying plate that is arranged at the outlet on the rear side of the horizontal louver and rectifies the wind from the fan located behind the air passage,
A drain pan having an open U shape in cross section is disposed below the heat exchanger, and a rear wall surface and a bottom wall surface of the drain pan constitute a part of a ventilation guide wall downstream of the fan of the air passage,
The rectifying plate is disposed so that the front end is opposed to a lower end nose tip portion that is a corner portion between the rear wall surface and the bottom wall surface of the drain pan, and the rear end is disposed in the vicinity of the fan.
The lateral louver is composed of a single plate material, and is disposed so as to close the front opening of the cabinet in its closed position, and is formed into a curved shape that matches the curved shape of the front opening of the cabinet, and the inner surface thereof. The side is formed to be a concave curved surface,
The control unit, in the upward blowing posture of the horizontal louver, causes the inner surface of the horizontal louver and the upper surface of the rectifying plate to cooperate to form a ventilation guide path that is longer than the depth length of the horizontal louver alone. In order to do so, control is performed to bring the lower end of the horizontal louver close to the front end of the rectifying plate. The rectifying plate is disposed at a substantially intermediate position in the vertical direction of the air outlet, and rectifies the turbulent flow that occurs at the lower end of the nose and blows it forward so that the short axis in the vertical direction and the longitudinal direction can be blown out. The wind direction changing device for an air conditioner according to claim 1, wherein the air direction changing device is formed in an elliptical shape with a flat cross section by a long axis .

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