JP6609722B1 - Air conditioner indoor unit - Google Patents

Abstract

An object of the present invention is to obtain an indoor unit of an air conditioner that can suppress a short circuit and also prevent a louver from bending. The indoor unit of the air conditioner includes a suction port, a plurality of air outlets provided so as to surround the suction port, and a plurality of louvers that are provided in each of the air outlets and are capable of adjusting the air outlet direction. Is provided. When the indoor unit is stopped, the louver is rotated in a direction to close the air outlet, and the louver angle when the indoor unit is turned in the direction to close the air outlet is a fully closed angle, and the indoor unit is operated. A remote control for setting the operation of the louver is sometimes provided, and when the minimum angle among the louver angles settable by the remote control is a first angle and the maximum angle is a second angle, Among the air outlets, the louver angles of some of the air outlets are set to a third angle that is larger than the fully closed angle that is the louver angle when the indoor unit is stopped and smaller than the first angle, The outlet louver is set to auto swing or bottom blowing.

Description

  The present invention relates to an indoor unit of an air conditioner having a plurality of air outlets and including a louver for controlling the wind direction of each air outlet, and is particularly suitable for a four-way ceiling cassette type indoor unit.

  As an indoor unit of a conventional air conditioner, there is a ceiling cassette type having a plurality of outlets (for example, four) and a louver for controlling the air direction of each outlet.

  Usually, the louver in an indoor unit of an air conditioner is configured to have a wind direction set by a user with a remote controller. However, under certain operating conditions, the indoor unit itself controls the louver to force the wind direction. Some are configured to change. For example, when heating start-up control is performed to quickly warm the room at the start of heating, or when control for improving temperature unevenness between the upper and lower parts of the room is being performed during normal heating operation. is there.

  As a prior art which implements the heating operation start-up control described above, there is one described in Japanese Patent Laid-Open No. 8-320145 (Patent Document 1). In the indoor unit (indoor unit) of an air conditioner described in Patent Document 1, warm air is directed into the indoor living space with the louver angle facing downward at the start of heating operation (at the start of heating operation). Directly blown out and convection heated to warm the room. Then, when the difference between the room temperature and the set temperature is within a predetermined value, the louver is swung up and down, and after a predetermined time has passed, the air direction of the blown air is controlled in a direction substantially parallel to the ceiling surface (horizontal blowing). And shifting to radiant heating operation is described.

  Thus, it is described that it is possible to perform comfortable heating without causing a resident in the room to feel a warm air flow with the radiant heat of the warm air near the ceiling while effectively preventing a decrease in the indoor temperature.

  Moreover, as a prior art which implements the control which improves the temperature nonuniformity of the indoor upper part and the lower part at the time of normal heating operation, there exists a thing of Unexamined-Japanese-Patent No. 2011-196666 (patent document 2). In the device described in Patent Document 2, when it is determined that the temperature is uneven, the temperature unevenness elimination control unit starts the swing operation of the louver, stops the swing operation when a predetermined condition is satisfied, and then the louver. Is controlled to take a downward posture.

JP-A-8-320145 JP 2011-196666 A

  In the above-mentioned Patent Document 1, at the start of heating, the louver angle is directed downward to warm the room by convection heating, and when the difference between the room temperature and the set temperature falls within a predetermined value, the louver is swung up and down. Thus, both the vicinity of the ceiling and the floor where people are present can be heated.

  Further, in the above-mentioned Patent Document 2, when the temperature unevenness state is reached, the swing operation of the louver is started, and when the predetermined condition is satisfied, the swing operation is stopped, and the louver is controlled to take a downward posture. Is trying to reduce.

  However, in the case of an air conditioner indoor unit having a plurality of (for example, four) outlets so as to surround the suction port, all the louvers are turned downward or all the louvers are swung up and down during the heating operation. And the state where the wind direction of all the blower outlets becomes a bottom blow simultaneously occurs. If all the air outlets are blown down simultaneously, there is a problem that the blown air is sucked into the air inlet before spreading into the indoor space, that is, a short circuit is likely to occur and the heating capacity is reduced. .

  In general, a suction air temperature sensor is installed at the suction port, but when a short circuit occurs, the suction air temperature sensor is set to the actual indoor air temperature by the blown air hitting the suction temperature sensor. There is also a problem of detecting a higher temperature and causing unnecessary heating stop (thermo-off).

  In an indoor unit having four outlets, by setting the louvers of some outlets to the fully closed position (position at the time of operation stop), the wind speed at the remaining outlets is increased, and the vertical temperature difference is small. Some have created an indoor environment (small temperature unevenness), but when the louver is in the fully closed position, there is a problem that the louver bends because the wind pressure of high-temperature air acts.

  An object of the present invention is to obtain an indoor unit of an air conditioner that can suppress a short circuit and also prevent a louver from bending.

  In order to achieve the above-mentioned object, the present invention is configured to be able to adjust a blow-out direction provided at each of the blow-out openings, and a plurality of blow-out openings provided so as to surround the suction openings. In an indoor unit of an air conditioner comprising a plurality of louvers, when the indoor unit is stopped, the louver is rotated in a direction to close the air outlet, and the indoor unit is stopped in a direction to close the air outlet The louver angle at the time is a fully closed angle, a remote control is provided for setting the operation of the louver during operation of the indoor unit, and the minimum angle among the louver angles that can be set by the remote control is a first angle, When the maximum angle is the second angle, during heating operation, the louver angles of some of the plurality of outlets are larger than the fully closed angle, which is the louver angle when the indoor unit is stopped, and the first Smaller than one angle Is set to have a third angle, the louver of the other of said air outlet, characterized in that it is set to blow the auto swing or down.

  ADVANTAGE OF THE INVENTION According to this invention, there exists an effect which can obtain the indoor unit of the air conditioner which can suppress a short circuit and can also prevent the bending of a louver.

It is a perspective view which shows Example 1 of the indoor unit of the air conditioner of this invention. It is a longitudinal cross-sectional view of the indoor unit shown in FIG. It is one principal part sectional drawing of the blower outlet shown in FIG. 1, FIG. 2, and is a figure of a louver in a fully closed state. It is sectional drawing of one principal part of the blower outlet shown in FIG. 1, FIG. 2, and is a figure which shows the minimum angle (1st angle) and maximum angle (2nd angle) of a louver during indoor unit operation. FIG. 3 is a cross-sectional view of one main part of the air outlet shown in FIGS. 1 and 2, illustrating a third angle of the louver in the first embodiment. It is a figure explaining the effect | action in the state in which the louver shown in FIG. 5 is a 3rd angle. It is a figure explaining the louver operation at the time of start-up operation and the subsequent stirring operation in the indoor unit of the conventional air conditioner. In FIG. 7, it is a figure explaining the short circuit phenomenon at the time of all the louvers blowing down at the time of start-up operation and the subsequent stirring operation. It is a figure explaining the louver operation at the time of the starting operation and the subsequent stirring operation in the first embodiment of the indoor unit of the air conditioner. It is a figure explaining the louver operation | movement at the time of the stirring operation shown in FIG. 9, the flow of blowing air, and the flow of suction air. It is a figure explaining the louver operation at the time of the starting operation and the subsequent stirring operation in the second embodiment of the indoor unit of the air conditioner. It is a figure explaining the louver operation | movement at the time of the starting operation in the Example 3 of the indoor unit of an air conditioner, and the subsequent stirring operation.

  Hereinafter, specific examples of the present invention will be described with reference to the drawings. In each figure, the part which attached | subjected the same code | symbol has shown the part which is the same or it corresponds.

A first embodiment of an indoor unit of an air conditioner according to the present invention will be described with reference to FIGS.
First, the whole structure of the indoor unit of the air conditioner in the present Example 1 is demonstrated using FIG. FIG. 1 is a perspective view illustrating an indoor unit of an air conditioner according to the first embodiment.

  As shown in FIG. 1, an indoor unit 1 of an air conditioner is connected to an outdoor unit (not shown) by a refrigerant pipe to form a refrigerant circuit, and a refrigerant is circulated to constitute a refrigeration cycle. This indoor unit 1 is a so-called ceiling cassette type, and includes a housing 2 embedded in an indoor ceiling and the like, a decorative panel 3 provided so as to close a lower surface opening of the housing 2, and the like. Are provided with a suction port 4 which is provided in the center and sucks room air and four air outlets 5 which are provided so as to surround the suction port 4.

  A suction grille 6 is provided at the suction port 4, and a louver 7 is provided at each of the blowout ports 5 so as to be rotatable so as to adjust the blowing direction of the air blown from the blowout port 5. The louver 7 shown in FIG. 1 shows a state where the indoor unit 1 is stopped and fully closed, that is, a state where the louver angle is a fully closed angle (0 degree). The fully closed state includes not only a state in which the air outlet 5 is completely closed, but also a state in which the opening area is minimized so that the louver substantially closes the air outlet.

  FIG. 2 is a longitudinal sectional view of the indoor unit 1 shown in FIG. As shown in FIG. 2, a motor 8 and a centrifugal fan 9 connected to the rotating shaft of the motor 8 are installed in the center of the housing 2. The motor 8 is fixed to the center of the top plate of the housing 2.

  Further, a square-shaped heat exchanger 10 is installed around the centrifugal fan 9 so as to surround the centrifugal fan 9 in a plan view. The heat exchanger 10 is a cross fin type fin-and-tube heat exchanger. Further, a drain pan 11 for receiving dew condensation water generated in the heat exchanger 10 is installed at the lower part of the heat exchanger 10. As the drain pan 11, a heat insulating material made of styrene foam is generally used, a water receiving groove is formed along the lower end of the heat exchanger 10, and the lower end portion of the heat exchanger 10 enters the water receiving groove. . Although not shown, the air outlet 5 is formed of a heat insulating material that is integral with or separate from the heat insulating material that constitutes the drain pan 11.

  Reference numeral 20 denotes an indoor ceiling, and the indoor unit 1 is installed with the casing 2 embedded in the ceiling 20. The decorative panel 3 is formed in a square shape that is slightly larger than the casing 2, is disposed along the ceiling 20 so as to cover the lower surface of the casing 2, and is exposed to the indoor space.

  The louver 7 provided at the air outlet 5 of the decorative panel 3 is in a fully closed position (louver angle is 0 degree) in FIG. 2, and shows a state in which the operation of the indoor unit 1 is stopped. . When the indoor unit 1 is started to operate, the louver 7 is rotated so as to open the air outlet 5, and a predetermined value set by a user from a remote controller (not shown) such as bottom blowing or side blowing (horizontal blowing). Fixed at an angle. Alternatively, when the user sets the operation of the louver 7 to auto swing from the remote controller, the louver 7 performs the auto swing operation in the range from the minimum angle to the maximum angle.

  When the operation of the indoor unit 1 is started, room air is sucked from the suction portion 12 of the centrifugal fan 9 through the suction port 4 and the suction grill 6, and is discharged from the discharge portion 13 of the centrifugal fan 9 to the outer periphery. Discharged in the direction. After the air discharged from the centrifugal fan 9 passes through the heat exchanger 10 and is cooled or heated, the air-conditioned air flows between the outer peripheral surface of the heat exchanger 10 and the inner peripheral surface of the housing 2. The air is blown out into the room from the air outlet 5 formed in the decorative panel 3 through the formed air passage 14.

At this time, if the louver 7 is set to the downward blowing angle, the conditioned air is blown downward, and if the louver 7 is set to the horizontal blowing angle, the louver 7 is blown substantially in the horizontal direction (horizontal direction). Further, when the above-described auto swing is set, the louver 7 performs the auto swing operation in the range from the minimum angle to the maximum angle, so that the conditioned air is vertical from the direction close to the horizontal according to the movement of the louver 7. It is blown out to the direction near.
In FIG. 2, 15 is a bell mouth that is arranged below the centrifugal fan 9 and has an opening that rises toward the suction portion 12 of the centrifugal fan 9 while gradually reducing the diameter at the center. The bell mouth 15 is for guiding the air sucked from the suction port 4 to the centrifugal fan 9. The bell mouth 15, together with the drain pan 11, partitions the internal space of the housing 2 into a suction side and a blow-out side of the centrifugal fan 9.

  Reference numeral 16 denotes an electrical component box that houses a control board for controlling the operation of the indoor unit 1. The electrical component box 16 is installed on the lower surface of the bell mouth 15. Reference numeral 17 denotes a suction filter installed on the upper side of the suction grill 6.

  Next, a configuration in the vicinity of the louver 7 when the louver 7 is in the fully closed state, that is, when the louver 7 is in the fully closed angle (0 degree) will be described with reference to FIG. FIG. 3 is a cross-sectional view of one main part of the air outlet shown in FIGS. 1 and 2, and the louver is in a fully closed angle state. When the operation of the indoor unit 1 is stopped, the louver 7 is in the state of the fully closed angle shown in FIG. 3, preventing foreign matter from entering the indoor unit while the indoor unit 1 is stopped, and stopping the indoor unit. The design of the time is improved.

As shown in FIG. 3, the fully closed angle (0 degree) of the louver 7 is generally not a state in which the air outlet 5 is completely closed, but the left and right ends of the louver 7 and the air outlet 5 are formed. A slight gap is formed between the wall surface of the decorative panel 3 and the louver 7 and the wall surface of the air outlet 5 are configured not to interfere with each other.
In FIG. 3, reference numeral 3 a denotes a heat insulating material such as a polystyrene foam that forms the air outlet 5.

  As shown in FIG. 1, the louver 7 is formed in an elongated plate shape or wing shape extending from one end to the other end in the longitudinal direction of the air outlet 5, and the louver 7 has a central axis extending in the longitudinal direction. 18 is fixed via an attachment member 19. The central shaft 18 is rotatably supported by support members (not shown) disposed at both ends thereof, and its rotation is controlled by a stepping motor or the like.

  FIG. 4 is a cross-sectional view of one main part of the air outlet shown in FIGS. 1 and 2, and shows the minimum angle and the maximum angle of the louver during operation of the indoor unit. That is, FIG. 4 shows the operating range of the louver 7 when the indoor unit 1 is in operation, and the louver 7a indicated by a solid line is the minimum angle of the louver 7 that can be set by the user with a remote controller (not shown). A louver 7b that indicates (first angle) and is indicated by a one-dot chain line indicates the maximum angle (second angle) of the louver 7 that can be set by the user with the remote controller.

  When the louver 7 is set to the position 7a of the minimum angle (first angle), the conditioned air blown from the blowout port 5 is in a side blowing operation in which it is blown out substantially in the horizontal direction. On the other hand, when the louver 7 is set to the position 7b of the maximum angle (second angle), the conditioned air blown from the blowout port 5 is in a downward blowing operation in which it is blown out in a substantially vertical direction.

  When the fully closed angle, which is the louver angle when the outdoor unit 1 is stopped as shown in FIG. 3, is set to 0 degree, in this embodiment, the minimum angle (first angle) is set to, for example, 28 degrees, and the maximum angle ( The second angle) is, for example, 64 degrees. The minimum angle (first angle) may be arbitrarily set, for example, in the range of about 27 to 30 degrees. The maximum angle (second angle) may be arbitrarily set within a range of about 60 to 70 degrees, for example.

  The angle of the louver 7 during the operation of the indoor unit 1 can be set from the remote controller to the aforementioned minimum angle and maximum angle, as well as from the remote controller in several steps in steps of several degrees between the aforementioned minimum angle and maximum angle. It is configured to be configurable. For example, the minimum angle is the first step and the maximum angle is the seventh step, and the five steps (second to sixth steps) can be set between the first and seventh steps. . Note that the angle of the louver 7 is not limited to seven steps, and may be larger or smaller. Moreover, you may comprise so that a louver angle can be set to arbitrary angles without a step.

  When the operation of the louver 7 is set to auto swing from the remote controller, the louver 7 has an angle at the start of auto swing setting, for example, the first angle, which is the minimum angle, and the second, third,... The reciprocating operation is repeated until the 7th stage is increased, and then, in the reverse direction, the 6th stage, the 5th stage,...

  The auto swing is not limited to the reciprocating operation between the first stage to the seventh stage, and may be configured to perform the reciprocating operation of the third stage to the seventh stage, for example. Further, at the time of auto swing, the louver angle can be configured to change smoothly and continuously.

  In an air conditioner indoor unit as described above, for example, in heating operation, during high load operation where the temperature difference between the outside air temperature and room temperature is very large, the air direction is reduced so that warm air is supplied downward. Although blowing is performed, the blown air may not be able to reach the floor sufficiently.

  Moreover, as another means for reducing the opening area of the blower outlet 5 of the indoor unit 1, as shown in FIG. It is also conceivable to increase the wind speed at the remaining outlets by setting the fully closed position (the position when the operation is stopped).

  However, when the indoor unit is operated with the louvers 7 of some outlets 5 in the fully closed position, the louver in the fully closed position is greatly deflected by the wind pressure of the blown air, and the blown air is hot. Resin louvers have a problem that they tend to cause plastic deformation when operated for a long time.

  The structure of the indoor unit of the air conditioner of the present embodiment that solves the above problem will be described with reference to FIGS. FIG. 5 is a cross-sectional view of one main part of the air outlet shown in FIGS. 1 and 2, and is a diagram for explaining a third angle of the louver in the first embodiment, and FIG. 6 is a state where the louver shown in FIG. It is a figure explaining the effect | action in.

  In FIG. 5, a position 7a of the louver 7 indicated by a one-dot chain line indicates a case where the louver 7 is set at a minimum angle (first angle), and a position 7b of the louver 7 also indicated by a one-dot chain line is The case where the louver 7 is set to the position of the maximum angle (second angle) is shown. The positions 7a and 7b of these louvers 7 are angles of the louvers 7 that can be set from a remote controller (not shown), and are functions that are generally provided in conventional indoor units. The louver 7 is generally provided with a function of automatically swinging in the range from the first angular position 7a to the second angular position, and can be set from a remote controller.

  In this embodiment, the angle of each louver 7 at the four outlets 5 shown in FIG. 1 is changed to a fully closed angle (louver angle 0), which is the louver angle when the indoor unit is stopped as shown in FIG. And a third angle position 7c smaller than the first angle which is the minimum opening degree of the louver 7 which can be set from the remote controller.

The position 7c of the third angle of the louver 7 is not an angle that can be set by the user from the remote controller, but in the indoor unit 1 of the air conditioner or the like in a predetermined operating condition such as at the start of heating operation. The angular position of the louver 7 is automatically set from a control device (not shown) provided.
For example, when the first angle is 28 degrees, the third angle is larger than 0 degrees that is a fully closed angle when the indoor unit is stopped, and the first angle (the minimum angle that the user can set from the remote control) ( Smaller than 28 degrees), for example, 14 degrees. The third angle is not limited to 14 degrees, and may be arbitrarily set in the range of 5 to 25 degrees, preferably in the range of 10 to 18 degrees.

  That is, in the present embodiment, when the minimum angle (first angle), which is the angle of the louver 7 that can be set from the remote controller, is set to the first step and the maximum angle (second angle) is set to the seventh step, the third angle Corresponds to the angle of the 0.5th step. The angle of the 0.5th step is not a louver angle that can be set by the user from the remote control, but is determined by the control device provided in the indoor unit 1 or the like. It is an angle that is automatically set for conditions.

  In this embodiment, as described above, each louver 7 is configured to be set at the position 7c of the third angle (0.5th stage angle), and the air conditioner performs a predetermined operation determined in advance. In the case of the condition, among the louvers 7 of the plurality of outlets 5, the louvers 7 of some of the outlets 5 are set at the position 7 c of the third angle.

  By setting the louvers 7 of some of the air outlets 5 at the position of the third angle (an angle larger than the fully closed angle of the louver and smaller than the first angle), as shown by a hatched circle in FIG. A small gap 21 can be formed between the wall surface of the outlet 5 and the end of the louver 7. Therefore, since the airflow can be blown out from the gap 21, the deflection of the louver due to the wind pressure can be reduced. Therefore, since the deflection of the louver 7 can be suppressed, it is possible to suppress the louver from being plastically deformed even when high-temperature air is blown into the room.

  Note that the louver 7 set to the third angle may be configured to be sequentially switched every predetermined time. Further, the louver 7 of the other outlet 5 performs a louver operation that can be set from the remote controller. That is, the other louvers 7 are set to auto swing or set to an arbitrary louver angle.

The predetermined operating conditions set in advance for the air conditioner are, for example, the following operating conditions. When the following operation is performed, some of the air outlets of the louvers of the air outlets The louver may be configured to be automatically set to the third angle from a control device (not shown) provided in the indoor unit 1, for example.
(1) When heating operation is set.
(2) When operating under high load operating conditions in which the temperature difference between the outside air temperature and room temperature is greater than a predetermined temperature difference during heating operation or cooling operation.
(3) When a high-speed blowout setting is made to make the blown air reach farther than usual, such as near the floor, during heating operation or cooling operation.
(4) When a stirring operation is set to increase the blown air speed during heating operation or the like to reduce the temperature difference between the upper part and the lower part of the room, or the control device of the air conditioner automatically executes the stirring operation If.

  As described above, the third angle is not the one in which the user can set an arbitrary louver from the remote controller to the third angle. The angle is automatically set from the control device of the machine. For example, when the operation (1), (3), or (4) described above is set, or when the operation is performed under the condition (2), the stirring operation (4) is automatically executed. In this case, the angle of the louver 7 of any of the outlets 5 is automatically set to the third angular position from the control device.

  By configuring in this way, the opening area of the blower outlet 5 of the louver part set to the third angle is reduced, so that the amount of air blown from the blower outlet 5 is greatly reduced, and the other blower outlets 5 The blowing wind speed from can be increased sufficiently. Accordingly, the blown air can reach a sufficiently distant position such as the floor surface.

  Moreover, in the blower outlet 5 of the louver part set to the said 3rd angle, the small clearance gap 21 mentioned above can be formed between the wall surface of this blower outlet 5, and the edge part of the said louver 7, This clearance gap 21 can be formed. Since the air current can be blown out from the air, the deflection of the louver 7 due to the wind pressure can be reduced. Therefore, even when the rotational speed of the centrifugal fan 9 is increased and a large amount of high-temperature air is blown into the room, the deflection of the louver 7 can be reduced, so that plastic deformation of the louver 7 can also be suppressed.

In the above description, when the predetermined operating conditions are set in advance, the louver angle of some of the plurality of outlets is set to the third angle. It may replace with and may be comprised as follows.
That is, when the predetermined operating condition is reached, the angle of the louver 7 of some of the plurality of outlets 5 is not immediately controlled to the third angle, but the louver 7 is first plastic. It may be possible to first hold at a fully closed angle for a predetermined time that does not cause deformation, and then control the louver 7 to the third angle after the predetermined time has elapsed.

  With this configuration, when the louver 7 is held at the fully closed angle, the blown air speed from the other outlets 5 can be further increased as compared with the case where the louver 7 is controlled to the third angle. The effect of blowing can be further improved. In addition, since the louver 7 is controlled to the third angle before the louver 7 controlled to the fully closed angle causes plastic deformation, an effect of preventing plastic deformation of the louver 7 can be obtained.

In the above description, the minimum angle that can be set by the remote controller is the first angle, and the louver angle that is larger than the fully closed angle that is the louver angle when the indoor unit is stopped and smaller than the first angle is the third angle. However, instead of this, it may be configured as follows.
That is, when the louver has a function of automatically swinging, the minimum angle of the louver during the automatic swing is the first angle, and the louver is larger than the fully closed angle that is the louver angle when the indoor unit is stopped and smaller than the first angle. The angle may be set to the third angle.

  As described above, in this embodiment, the angle of the louvers 7 of some of the plurality of outlets 5 is determined under predetermined operating conditions such as when high-speed outlets are set. Is set to a third angle that is larger than the fully closed angle (0 degree) that is the louver angle when the indoor unit is stopped and that can be set by the remote controller or smaller than the first angle that is the minimum angle during auto swing, Since the louver 7 of the air outlet is set to the second angle or the auto swing, the louver provided in each air outlet 5 while enabling high-speed air blowing from a part of the air outlets of the plurality of air outlets 5. 7 can also be suppressed.

  Next, the louver operation in the conventional indoor unit 1 and the louver operation in the indoor unit 1 according to the first embodiment will be described with reference to FIGS. FIG. 7 is a diagram for explaining the louver operation during the start-up operation and the subsequent agitation operation in the indoor unit of the conventional air conditioner. FIG. 8 is the same as FIG. 7 in the start-up operation and the subsequent agitation operation. FIG. 9 is a diagram for explaining a short circuit phenomenon when the louver of the air conditioner is blown down, and FIG. 10 and 10 are diagrams for explaining the louver operation, the flow of blown air, and the flow of suction air during the stirring operation shown in FIG.

  In the conventional indoor unit, during the start-up operation of the heating operation, as shown in FIG. 7, the louvers 7A to 7D of the four outlets 5 shown in FIG. The maximum angle is controlled, and then, after a predetermined time has elapsed, all of the louvers 7A to 7D perform an auto swing operation, and a stirring operation is performed. The stirring operation is performed for a predetermined time, and thereafter, the normal operation is performed.

  For this reason, at the time of heating start-up operation, the wind direction of all the four outlets 5 becomes a 2nd angle (down blowing) simultaneously. In addition, since all the louvers 7A to 7D perform an automatic swing operation during the stirring operation performed after a predetermined time has elapsed, all four louvers 7A to 7D simultaneously perform the second angle (downward blowing) during the auto swing operation. ).

In this way, when all four louvers 7A to 7D are blown downward, as shown in FIG. 8, the heated warm air 22 is provided on the lower center surface of the indoor unit 1 before spreading into the indoor space R. The phenomenon of being sucked into the suction port 4, that is, the short circuit phenomenon (see the short circuit flow 23) is likely to occur. For this reason, while the heating capability of an air conditioner falls, since the heated hot blowing air is immediately sucked in, the efficiency of an air conditioner also falls.
In FIG. 8, reference numeral 24 denotes the flow of indoor cold air that is sucked into the air inlet 4 of the indoor unit 1 from the vicinity of the floor surface F forming the indoor space R.

  The indoor unit of the air conditioner of the first embodiment that solves the above-described problems of the conventional indoor unit of the air conditioner will be described with reference to FIGS. 9 and 10. In the first embodiment, in order to improve the short circuit phenomenon described above, the louvers 7A to 7D of the four outlets 5 shown in FIG. 1 are controlled as shown in FIG. Also in the first embodiment, at the time of heating start-up operation, the same as that shown in FIG. 7 in that the air directions of the louvers 7A to 7D of all four outlets 5 are simultaneously controlled to the second angle (downward blowing). Controlled.

  The indoor unit 1 of the first embodiment is different from the conventional one shown in FIGS. 7 and 8 in the control of the louvers 7A to 7D in the stirring operation performed after the heating start-up operation has elapsed for a predetermined time. In this embodiment, of the louvers 7 of the four outlets 5, the louvers 7 </ b> B to 7 </ b> D of the three outlets 5 perform the automatic swing operation and the stirring operation is performed. As shown in FIG. 9, the louvers 7 </ b> A of some of the air outlets 5 of the louvers 7 are controlled to the third angle described above with reference to FIG.

  The third angle (blowing above horizontal) is a minimum opening of the louver 7 that is larger than the fully closed angle (louver angle 0 degree) that is the louver angle when the indoor unit is stopped as shown in FIG. It is an angle (0.5 step angle) smaller than a certain first angle (first step angle), for example, an angle such as 14 degrees.

  Further, as described above, the position 7c of the third angle of the louver 7 is not an angle that can be set by the user from the remote controller, but when the predetermined operating conditions are set in advance, the indoor unit 1 of the air conditioner, etc. The angle position of the louver 7 is automatically set from the control device provided in

  In the prior art, since all the louvers 7A to 7D perform the automatic swing operation during the stirring operation, all the four louvers 7A to 7D may face downward during the auto swing operation. As described above, there is a problem that causes a short circuit phenomenon. On the other hand, in the present Example 1, since the louver 7A of one blower outlet 5 is made the said 3rd angle (blow more than horizontal), the following effects are acquired.

  That is, as shown in FIG. 10, from the air outlet 5 provided with the louver 7A having the third angle, the air is blown above the indoor space R (on the ceiling 20 side) as shown by the air 22a. become. For this reason, since the passage 25 of suction air is formed under the blower outlet 5 provided with the louver 7A, the cool air of the downward | lower direction in the indoor space R is the suction inlet of the indoor unit 1 as shown with the flow 24 of indoor air. 4 is easily inhaled. As a result, a short circuit phenomenon (see FIG. 8) in which a part of the hot air is immediately sucked from the suction port 4 can be suppressed, and the heated hot air is immediately sucked from the suction port. By suppressing this, the cool air below the indoor space R can be efficiently sucked into the indoor unit 1, so that the efficiency of the air conditioner can be improved.

  Further, since the louver 7A is set at the position of the third angle, a small gap 21 is formed between the wall surface of the outlet 5 and the end of the louver 7 as shown by a hatched circle in FIG. be able to. Therefore, since the airflow can be blown out from the gap 21, it is possible to reduce the deflection of the louver 7A due to the wind pressure and to suppress the plastic deformation of the louver even when high-temperature air is blown into the room. Can also be obtained.

Thus, according to the first embodiment, there is an effect that it is possible to obtain an indoor unit of an air conditioner that can suppress a short circuit and also prevent a louver from being bent. Further, high-speed blowout is possible from the blowout port 5 having a louver other than the louver set to the third angle.
Note that the heating start-up operation shown in FIG. 9 is performed when the user sets a high-load heating mode or the like. When the high-load heating mode or the like is set, the air conditioner automatically Thus, the heating start-up operation shown in FIG. 9 is performed. Immediately after the start of the heating operation, the start-up operation is performed for a predetermined time, for example, about 30 minutes, and then the operation is shifted to the stirring operation. This agitation operation is performed for about 10 minutes, and thereafter, the operation shifts to a normal operation that can be freely set by the user from the remote controller.

  A second embodiment of the indoor unit for an air conditioner of the present invention will be described with reference to FIG. Since the basic configuration of the indoor unit 1 is the same as that of the first embodiment described with reference to FIGS. 1 to 6 and 10, the description of the same parts is omitted, and the second embodiment is the first embodiment. It demonstrates centering on a different part.

  FIG. 11 is a diagram illustrating the louver operation during the start-up operation and the subsequent stirring operation in the air conditioner indoor unit according to the second embodiment. Also in the second embodiment, at the time of heating start-up operation, the same as that shown in FIG. 7 in that the air directions of the louvers 7A to 7D of all four outlets 5 are simultaneously controlled to the second angle (downward blowing). Controlled.

  The difference between the indoor unit 1 of the second embodiment and the first embodiment described above is the control of the louvers 7A to 7D in the stirring operation performed after the heating start-up operation has elapsed for a predetermined time, as shown in FIG. is there. In the second embodiment, when the agitation operation is started, first, the louvers 7B to 7D of the three outlets 5 out of the louvers 7 of the four outlets 5 perform the automatic swing operation and the agitation operation is performed. The louvers 7A of some of the outlets 5 of the louvers 7 of the outlet 5 are controlled to the third angle (horizontal or more blowing), as shown in FIG.

  However, in the second embodiment, the louver 7 </ b> A is controlled to the third angle for a predetermined time, and thereafter, the louver 7 of the three outlets 5 out of the louvers 7 of the four outlets 5. , 7C, 7D perform an automatic swing operation so that the stirring operation is performed, and the louvers 7B of some of the louvers 7 of the four outlets 5 are at the third angle (blowing above horizontal). Controlled and fixed.

  Further, after a certain period of time, the louvers 7A, 7B, and 7D of the three outlets 5 perform the automatic swing operation to perform the stirring operation, and the louver 7C is fixed at the third angle (horizontal or more blowing). After a certain period of time has passed, the louvers 7A to 7C of the three outlets 5 perform an automatic swing operation to perform a stirring operation, and the louver 7D is blown to the third angle (horizontal or higher). ) To be fixed. Thereafter, the same operation is sequentially repeated at regular time intervals to perform the stirring operation. In addition, it transfers to a normal operation after completion | finish of stirring operation.

As shown in FIG. 11, the following effects can be obtained by controlling the louver having the third angle to be sequentially switched every time a fixed time elapses during the stirring operation.
That is, although the indoor space below the louver that becomes the third angle (blow more than horizontal) is difficult to warm, the configuration of the second embodiment can provide an effect of reducing the unevenness of the indoor temperature.

  Embodiment 3 of the indoor unit for an air conditioner of the present invention will be described with reference to FIG. FIG. 12 is a diagram illustrating the louver operation during the start-up operation and the subsequent agitation operation in the air conditioner indoor unit according to the third embodiment. The basic configuration of the indoor unit 1 is the same as that of the first embodiment described with reference to FIGS. 1 to 6 and FIG. 10, and therefore, the description of the same parts is omitted, and the third embodiment is described above. A description will be given centering on differences from Example 1.

  In the third embodiment, during the heating start-up operation, the wind directions of a part (two in the present embodiment) of the louvers 7A and 7C out of the four louvers 7 of the outlet 5 are simultaneously set to the second angle (lower blowing). ), And the other louvers 7B and 7D are controlled to the third angle (blow more than horizontal).

  In the third embodiment, the control of the louvers 7A to 7D in the stirring operation that is performed after the heating start-up operation has elapsed for a predetermined time is controlled in the same manner as in the first embodiment described with reference to FIG. That is, in the third embodiment, when the agitation operation is performed, the louvers 7B to 7D of the three outlets 5 out of the louvers 7 of the four outlets 5 perform the automatic swing operation and the agitation operation is performed. As shown in FIG. 12, the louvers 7 </ b> A of some of the outlets 5 of the louvers 7 of the outlet 5 are configured to be controlled to the third angle (horizontal or more blowing).

  According to the third embodiment, during the downward blowing operation during the heating start-up operation, some of the louvers 7B and 7D are controlled to the third angle, so that they are blown downward from the other louvers 7A and 7C. High-speed blowout with a further increased wind speed is possible, and the effect of quickly raising the ambient temperature of the person in the indoor space can be obtained. Further, since the louvers 7B and 7D are controlled to the third angle, a suction air passage 25 (see FIG. 10) is formed below the air outlet 5 provided with these louvers 7B and 7D, and the indoor space Since the cool air below R is easily sucked from the suction port 4 of the indoor unit 1, the short circuit phenomenon described with reference to FIG. 8 can also be suppressed.

  In addition, the control of the louvers 7A to 7D in the stirring operation performed after the heating start-up operation has passed for a predetermined period of time controls the entire air in the indoor space while suppressing the short circuit as in the first embodiment shown in FIG. Can be warmed up evenly.

  Furthermore, in the third embodiment, a part of the louvers are controlled to the third angle in both the heating start-up operation and the agitation operation. Therefore, as described with reference to FIG. Therefore, even when high temperature air is blown into the room, the louver can be prevented from being plastically deformed.

  In the above description of the third embodiment, the example in which the louvers 7B and 7D are controlled to the third angle during the heating start-up operation has been described. However, the louvers to be controlled to the third angle may be 7A and 7C. Alternatively, only one of the four louvers may be controlled to the third angle. Further, the example in which the louver 7A is controlled to the third angle during the stirring operation has been described. However, the louver controlled to the third angle may be any one of the four louvers controlled to the third angle. Alternatively, a configuration may be adopted in which any plurality of louvers are controlled to the third angle.

  As described above, according to each embodiment of the present invention, a plurality of air outlets provided so as to surround the periphery of the suction port, and the air outlet direction provided at each of the air outlets can be adjusted. In an indoor unit of an air conditioner having a plurality of louvers, during heating operation, the louver angle of some of the plurality of outlets is larger than the fully closed angle and is the minimum angle that can be set from the remote controller. It is set as the 3rd angle smaller than a certain 1st angle, and the louver of another blower outlet is set as the bottom blow or an auto swing. Therefore, even when a louver other than the louver set to the third angle simultaneously becomes the second angle, which is the maximum angle that can be set from the remote controller, the room below the louver controlled to the third angle Since it is possible to secure a passage for sucking air (cold air), it is possible to suppress a short circuit.

  That is, since air is blown from the air outlet provided with the louver controlled to the third angle at an angle equal to or greater than the horizontal direction, cold air below the indoor space is sucked into the air inlet of the indoor unit below the louver. A road is formed. Therefore, occurrence of a short circuit can be suppressed.

  In addition, since the louvers of some of the plurality of air outlets are set to the third angle, the wind speed blown from other air outlets can be increased, and the temperature around the person in the indoor space can be increased. It can be raised early or the stirring operation can be performed efficiently. Furthermore, since it is possible to alleviate the action of the wind pressure of high-temperature air on the louver set at the third angle, an effect of suppressing the plastic deformation due to the louver being bent can be obtained.

In addition, this invention is not limited to the Example mentioned above, Various modifications are included. For example, in Examples 1 to 3 described above, the example in which all louvers are set to the second angle (down blowing) or some louvers are set to the third angle (horizontal or more blowing) during the heating start-up operation is described. The louver may be set to auto swing, or a part of the louvers may be set to the third angle and the other louvers may be configured to auto swing.
Further, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described.

  1: indoor unit 1: housing, 3: decorative panel, 3a: heat insulating material, 4: suction port, 5: air outlet, 6: suction grille, 7: louver, 7a: position of minimum angle (first angle), 7b: position of maximum angle (second angle), 8: motor, 9: centrifugal fan, 10: heat exchanger, 11: drain pan, 12: suction part, 13: discharge part, 14: air path, 15: bellmouth 16: Electrical box, 17: Suction filter, 18: Center shaft, 19: Mounting member, 20: Ceiling, 21: Clearance, 22, 22a: Air blown out, 23: Short circuit flow, 24: Indoor air flow 25: Passage path of intake air, F: Floor surface, R: Indoor space.

Claims (10)

An air conditioner comprising: a suction port; a plurality of air outlets provided so as to surround the suction port; and a plurality of louvers that are provided in each of the air outlets and configured to be able to adjust the air outlet direction. In indoor units,
When the indoor unit is stopped, the louver is rotated in the direction to close the outlet, and the louver angle that is rotated in the direction to close the outlet is the fully closed angle.
A remote controller for setting the operation of the louver during operation of the indoor unit, when the minimum angle among the louver angles that can be set by the remote controller is a first angle and the maximum angle is a second angle;
During heating operation, the louver angles of some of the plurality of outlets are set to a third angle that is larger than the fully closed angle that is the louver angle when the indoor unit is stopped and smaller than the first angle. The air conditioner indoor unit is characterized in that the other louver of the air outlet is set to auto swing. In the indoor unit of the air conditioner according to claim 1,
The indoor unit is an indoor unit of an air conditioner, wherein the indoor unit is a four-way indoor unit in which four outlets having louvers are provided around the suction port. In the indoor unit of the air conditioner according to claim 1,
The indoor unit of an air conditioner, wherein the louver set to the third angle is controlled to the third angle after being held at a fully closed angle for a predetermined time. In the indoor unit of the air conditioner according to claim 1,
When the fully closed angle, which is the louver angle when the indoor unit is stopped, is 0 degree, the first angle is in the range of 27 to 30 degrees, and the second angle is in the range of 60 to 70 degrees. Further, the indoor unit of the air conditioner is characterized in that the third angle is arbitrarily set in a range of 5 to 25 degrees. In the indoor unit of the air conditioner according to claim 4,
The indoor unit of an air conditioner, wherein the third angle is arbitrarily set within a range of 10 to 18 degrees. In the indoor unit of the air conditioner according to claim 1,
At the start of heating operation, the louvers of all the air outlets are set to downward blowing, and after a predetermined time has passed, the louver angles of some of the air outlets are set to the third angle, The air conditioner indoor unit is characterized in that the air outlet louver is set to auto swing. In the indoor unit of the air conditioner according to claim 1,
The indoor unit of an air conditioner, wherein the louver set to the third angle is configured to be sequentially switched every predetermined time. An air conditioner comprising: a suction port; a plurality of air outlets provided so as to surround the suction port; and a plurality of louvers that are provided in each of the air outlets and configured to be able to adjust the air outlet direction. In indoor units,
When the indoor unit is stopped, the louver is rotated in the direction to close the outlet, and the louver angle that is rotated in the direction to close the outlet is the fully closed angle.
When a remote control for setting the operation of the louver during operation of the indoor unit is provided, the minimum angle among the louver angles that can be set from the remote control is the first angle, and the maximum angle is the second angle.
During heating operation, the louver angles of some of the plurality of outlets are set to a third angle that is larger than the fully closed angle that is the louver angle when the indoor unit is stopped and smaller than the first angle. The air conditioner indoor unit is characterized in that the other louver of the air outlet is set to a lower air blower. The indoor unit of the air conditioner according to claim 8,
The indoor unit is a four-way indoor unit provided with four outlets provided with louvers around the suction port,
During the start-up operation immediately after the start of the heating operation, among the four outlets, some of the outlet louvers are controlled to the third angle, and the other outlet louvers are set to lower blowing, An indoor unit of an air conditioner characterized in that after a predetermined time has elapsed, the louvers of some of the air outlets are set to the third angle, and the agitation operation is performed by automatically swinging the louvers of the other air outlets. The indoor unit of the air conditioner according to claim 8,
The indoor unit of an air conditioner, wherein the louver set to the third angle is controlled to the third angle after being held at a fully closed angle for a predetermined time.

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