JP2013088074A - Air conditioner - Google Patents

Abstract

An air conditioner that suppresses dew condensation on a driving means that drives blades of a blowout port.
An air conditioner according to the present invention includes an indoor heat exchanger 5 that exchanges heat between a refrigerant and air, a blowout port 21 that blows out air that has undergone heat exchange in the indoor heat exchanger 5, and a blowout port 21 that blows out air. Left and right wind direction changing blades 23 that change the direction of the wind to be moved left and right, and left and right blade driving means 25 that drive the left and right wind direction changing blades 23, and the left and right blade driving means 25 are arranged on both sides or one side of the outlet. When the predetermined dew condition is satisfied, the rotation of the left / right wind direction changing blade 23 to the side where the left / right blade driving means 25 is disposed is restricted.
[Selection] Figure 10

Description

  The present invention relates to prevention of condensation in an air conditioner.

  Conventionally, in order to prevent condensation that occurs at the air outlet of an air conditioner indoor unit during cooling operation, there is a technique that prevents condensation by controlling the up-and-down air direction changing blades (see, for example, Patent Document 1).

JP 2003-185225 A

  However, in addition to the dew condensation on the blades that change the wind direction as in Patent Document 1, the outlet of the indoor unit has a through hole through which the connecting bar of the left and right blades that change the wind direction passes to the left and right. There was a problem that dew condensation might occur when cold air enters from the inside.

  This invention solves the said conventional subject, and it aims at providing the air conditioner which suppresses the dew on the drive means which drives the blade | wing of a blower outlet.

  In order to achieve the above object, an air conditioner of the present invention is an indoor heat exchanger that exchanges heat between a refrigerant and air, a blowout port that blows out air that has been heat-exchanged by the indoor heat exchanger, and a blowout from the blowout port. Left and right wind direction changing blades for changing the wind direction to the left and right, and left and right blade driving means for driving the left and right wind direction changing blades. When the attached condition is satisfied, by restricting the rotation of the left and right wind direction changing blades to the side where the left and right blade driving means are arranged, it is difficult for cold wind to reach the left and right blade driving means and to cause condensation. can do.

  ADVANTAGE OF THE INVENTION According to this invention, the air conditioner which suppresses dew condensation to the drive means which drives the blade | wing of a blower outlet can be provided.

The external perspective view and principal part block diagram of the indoor unit in Embodiment 1 of this invention Configuration schematic diagram of refrigeration cycle of air conditioner in Embodiment 1 Configuration schematic diagram of left and right wind direction change blades in the first embodiment The figure which shows the rotation range of the left-right wind direction change blade | wing in Embodiment 1 (A) State diagram of left blade before correction in the first embodiment (b) State diagram of left blade after correction in the first embodiment (A) State diagram of right wing before correction in the first embodiment (b) State diagram of right wing after correction in the first embodiment (A) State diagram of left wing in the first embodiment (b) State diagram of right wing in the first embodiment (A) State diagram of right and left wind direction change blades before correction in the first embodiment (b) State diagram of right and left wind direction change blades after correction in the first embodiment (A) State diagram of left blade before correction in the first embodiment (b) State diagram of left blade after correction in the first embodiment (A) State diagram of right and left wind direction change blades before correction in the first embodiment (b) State diagram of right and left wind direction change blades after correction in the first embodiment Voltage change diagram for stepping motor in Embodiment 1

  An air conditioner according to a first aspect of the present invention includes an indoor heat exchanger that exchanges heat between refrigerant and air, a blowout port that blows out air that has been heat-exchanged by the indoor heat exchanger, and a direction of wind blown from the blowout port. The left and right wind direction changing blades and the left and right blade driving means for driving the left and right wind direction changing blades, and the left and right blade driving means are arranged on both sides or one side of the outlet and when a predetermined dew condition is satisfied By restricting the rotation of the right and left wind direction changing blades to the side where the left and right blade driving means are disposed, it is possible to make it difficult for cold air to reach the left and right blade driving means and to prevent condensation.

  The air conditioner of the second invention is the air conditioner according to the second invention, particularly in the first invention, wherein the left and right blade driving means includes a motor, the predetermined dew condition is satisfied, and the left and right wind direction changing blades are not driven. Can suppress the occurrence of dew condensation by warming the motor by energizing the motor.

  In the air conditioner of the third invention, particularly in the second invention, the energization of the motor is periodically switched between on and off, so that the motor temperature is prevented from becoming too high and the durability is impaired. Can be suppressed, and power consumption can be prevented from increasing.

  In the air conditioner of the fourth invention, particularly in the first to third inventions, the left / right wind direction changing blade has a left / right / left wind direction changing blade located on the left side and a right / left wind direction changing blade located on the right side. The left and right wind direction changing blades and the right and left wind direction changing blades are independently driven and controlled, and when the predetermined dew conditions are met, the left and right and left wind direction changing blades are restricted from rotating and the right and left and right wind direction changing blades are restricted from rotating. And not only preventing condensation on the left and right blade driving means, but also suppressing the occurrence of condensation on the left and right blades themselves.

  The air conditioner of the fifth invention is the air conditioner according to the first to fourth inventions, in particular, when a swing mode for swinging the left and right wind direction changing blades with respect to a predetermined center axis is provided, and when a predetermined dew condition is satisfied, By correcting the predetermined center axis, it is possible to suppress the occurrence of condensation in the swing mode with simple control.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is an external perspective view and main part configuration diagram of an indoor unit according to Embodiment 1, and FIG. 2 is a schematic configuration diagram of a refrigeration cycle of an air conditioner.

  The air conditioner in the present embodiment is configured by connecting an indoor unit 1 installed indoors and an outdoor unit 2 installed outdoor using a refrigerant pipe 3.

The indoor unit 1 includes an indoor heat exchanger 5 that exchanges heat between indoor air and a refrigerant, and an indoor fan 6 that promotes heat exchange in the indoor heat exchanger 5 and blows air into the room. Moreover, the temperature sensor 7 which is an indoor temperature detection means which detects indoor temperature, and the humidity sensor 8 which is an indoor humidity detection means which detects indoor humidity are provided.

  The outdoor unit 2 includes an outdoor heat exchanger 9 that exchanges heat between the outdoor air and the refrigerant, an outdoor fan 10 that promotes heat exchange in the outdoor heat exchanger 9 and blows air, and compresses the refrigerant and discharges high-temperature refrigerant. A compressor 11 for switching, a four-way valve 12 for switching the flow path of the refrigerant, and a decompressor 13 for decompressing the refrigerant.

  And at the time of air_conditionaing | cooling operation, the refrigerating cycle is comprised so that a refrigerant | coolant may flow in order of the compressor 11, the four-way valve 12, the outdoor heat exchanger 9, the decompression device 13, the indoor heat exchanger 5, the four-way valve 12, and the compressor 11. During the heating operation, the refrigerant flow path is reversed by switching the four-way valve 12.

  In addition, an infrared sensor 4 that is a human body detection unit is disposed above the outlet of the indoor unit 1 to detect the presence of a person in the installed room and to detect the movement of the person. In the present embodiment, the infrared sensor 4 is disposed at the upper part of the outlet, but is not limited thereto, and may be provided on the front panel, for example.

  Further, in the present embodiment, the detection of indoor persons is performed using three pyroelectric infrared sensors 4, but depending on the size of the room, the number of infrared sensors 4 may be reduced to detect indoor persons. In addition, since the number of infrared sensors 4 may be increased to detect a person in the room, the number of infrared sensors 4 may be changed depending on the capacity of the air conditioner, for example. Conceivable. Further, in the present embodiment, the infrared sensor 4 is fixed, but it may be of a type driven left and right. In addition, although a pyroelectric infrared sensor is used, any type of sensor that can detect the position and movement of a person may be used. For example, a thermopile infrared sensor may be used.

  The front side of the indoor unit 1 is opened during the air conditioning operation and closed when the air conditioning operation is stopped, the front panel 20 that blows air into the room, and the up and down wind direction that changes the wind direction from the blowout port 21 up and down. A change blade 22 and a left and right wind direction change blade 23 that changes the wind direction of the wind from the outlet 21 to the left and right are provided.

  The remote control device 30 is provided with a remote control device 30 that gives a driving instruction to the indoor unit 1. The remote control device 30 includes a display unit 31 that displays driving information and other information, and an operation unit 32 that performs setting changes and commands. The operation unit 32 includes a plurality of buttons.

  The remote control device 30 can set an instruction for cooling operation or heating operation and a reference indoor set temperature, and in normal air conditioning operation, the air conditioning operation is performed so that the reference indoor set temperature is obtained.

  FIG. 3 is a schematic view of the left / right wind direction changing blade 23 at the outlet 21. In FIG. 3, the left and right wind direction changing blades 23 of the present embodiment are the left and right wind direction changing blades (hereinafter referred to as the left blade 23 a) arranged on the left side when viewed directly from the front direction of the indoor unit 1, and the front of the indoor unit 1. The right and left wind direction changing blades (hereinafter referred to as the right blade 23b) are arranged on the right side when viewed directly from the direction. The left blade 23a is configured by connecting a plurality of blades with a left rail 24a, and the right blade 23b is configured by connecting a plurality of blades with a right rail 24b.

  The left and right blade driving means 25 for driving the left and right wind direction changing blades 23 are a left and right blade driving means for driving the left rail 24a (hereinafter, left blade driving portion 25a), and a right and left blade driving means for driving the right rail 24b. (Hereinafter referred to as the right blade driving unit 25b), and each of the left and right blade driving means 25 includes a motor and a gear. When the motor is driven, the left blade 23a and the right blade 23b are driven in the left-right direction to control the air flow in the left-right direction.

  Further, a through hole 26a and a through hole 26b are provided on both sides of the air outlet 21, and the left rail 24a is connected to a left blade driving unit 25a disposed inside the casing of the indoor unit 1 through the through hole 26a. The right rail 24b is connected to the right blade driving unit 25b disposed inside the housing of the indoor unit 1 through the through hole 26b.

  FIG. 4 is a view showing the rotation range of the left / right wind direction changing blade 23. FIG. 4 is a view showing one of the plurality of left and right wind direction changing blades 23 as a representative, and the blade is driven by an angle A in the left and right direction around the fulcrum 27. The left crosspiece 24a or the right crosspiece 24b is connected to the fulcrum 27 of each left / right wind direction change blade 23, and the left / right wind direction change blades 23 connected by the same cross are controlled to face in the same direction. In addition, the arrow in a figure has shown the front direction (front panel 20 side of the indoor unit 1).

  In the air conditioner configured as described above, control for preventing dew on the left and right blade driving means 25 will be described below. First, the dew suppression control in a state where the left blade 23a is inclined toward the left blade drive unit 25a will be described.

  Fig.5 (a) is the figure which showed the wind direction change state of the left blade | wing 23a. The left blade 23a shown in FIG. 5 (a) is a view showing a state in which the left blade 23a is inclined to the left side by an angle X1 from the front direction. In FIG. 5 (a), only the left and right blades located on the leftmost side are shown and described for easy understanding, but the same operation is performed in all the left blades 23a connected by the left rail 24a.

  If the cooling operation is continued under the condition that the dew is easily attached in such a state, the cool air flows out through the through hole 26a and cools the left blade driving unit 25a. It will cause dew.

  Therefore, in the present embodiment, when it is easy to get dew, the rotation of the left blade 23a in the direction in which the left blade drive unit 25a is arranged is restricted. A specific example will be described below.

  In the present embodiment, the dew condition is cooling operation and the indoor humidity is not less than a predetermined humidity. For example, when the indoor humidity is detected to be 70% or more during the cooling operation, it is determined that the predetermined dew condition is satisfied. Note that the dew condition in this embodiment is an example. For example, the condition that the indoor temperature is equal to or higher than a predetermined indoor temperature or the condition that the outdoor temperature is lower than a predetermined outdoor temperature. May be put in. Further, when the humidity sensor is not provided, the determination may be made based only on the indoor temperature or the outdoor temperature.

  And when such a dew condition is satisfied, it restrict | limits so that the maximum value of rotation of the left blade | wing 23a may be suppressed. That is, the angle at which the left blade 23a is tilted toward the side where the left blade drive unit 25a is disposed is limited so as to rotate only to a predetermined angle.

  FIG. 5B is a state diagram in which the rotation of the left blade 23a is restricted. When the left blade 23a rotated to the left by an angle X1 as shown in FIG. 5 (a) satisfies a predetermined dew condition, the left blade 23a is turned to the left by an angle X2 as shown in FIG. 5 (b). However, the rotation is limited (angle X1> angle X2). The angle X2 is an angle determined in advance by experiments or the like, and can be changed as appropriate depending on the position of the through hole 26a.

  The left blade 23a has been described above, but the same applies to the right blade 23b. Next, dew suppression control in a state where the right blade 23b is tilted toward the right blade drive unit 25b will be described.

  FIG. 6A is a diagram showing a state of changing the wind direction of the right blade 23b. The right blade 23b shown in FIG. 6A is a view in a state in which the right blade 23b is inclined to the right side by an angle X1 from the front direction. In FIG. 6 (a), only the right and left blades located on the rightmost side are shown and described for easy understanding, but all the right blades 23b connected by the right rail 24b perform the same operation.

  And when such a dew condition is satisfied, it restrict | limits so that the maximum value of rotation of the right blade | wing 23b may be suppressed. That is, the angle at which the right blade 23b is inclined toward the side where the right blade driving unit 25b is disposed is limited so as to rotate only to a predetermined angle.

  FIG. 6B is a state diagram in which the rotation of the right blade 23b is restricted. When the right blade 23b rotated to the left by the angle X1 as shown in FIG. 6A satisfies a predetermined dew condition, the right blade 23b is turned to the angle X2 (left) as shown in FIG. 6B. The rotation is limited so as to rotate only by a predetermined limit angle. Note that the angle X2 is an angle determined in advance by experiments or the like, and can be appropriately changed depending on the position of the through hole 26b.

  As described above, in the present embodiment, when the left blade 23a is inclined to the side where the left blade drive unit 25a is disposed, the angle of rotation to the side where the left blade drive unit 25a is disposed is limited. When the right blade 23b is inclined to the side where the right blade drive unit 25b is disposed, the right and left blade drive means 25 ( It is possible to suppress the occurrence of condensation in the left blade drive unit 25a and the right blade drive unit 25b). In the above description, it is needless to say that when the angle X1 does not reach the angle X2, it is not necessary to restrict the rotation to prevent dew.

  Next, the control when the left blade 23a is inclined to the side opposite to the side where the left blade drive unit 25a is disposed will be described.

  FIG. 7A is a diagram illustrating a state in which the left blade 23a is inclined in a direction opposite to the direction in which the left blade driving unit 25a is disposed. In FIG. 7A, the flow of the air current is indicated by a dashed-dotted arrow. As shown in FIG. 7A, the airflow flowing on the left side of the left blade 23a located at the leftmost end (closest to the left blade drive unit 25a) travels straight, and the other airflow flows along the left blade 23a.

  As a result, the left blade 23a at the left end has a region 71 (indicated by a dotted line) in which the airflow does not flow along, and condensation occurs here.

  The same applies to the rightmost right blade 23b. FIG. 7B is a diagram illustrating a state in which the right blade 23b is inclined in a direction opposite to the direction in which the right blade driving unit 25b is disposed. In FIG. 7B, the flow of the air current is indicated by a one-dot chain line arrow as in FIG. 7A, and there is a region 71 (indicated by the dotted line) where the air current does not follow as in FIG. 7A. And condensation occurs.

  Therefore, in the present embodiment, the left blade 23a is restricted from rotating to the side opposite to the side on which the left blade driving unit 25a is disposed. Similarly, the right blade 23b restricts the rotation to the side opposite to the side where the right blade driving unit 25b is disposed. A specific example will be described below.

  FIG. 8A shows that the left blade 23a is inclined at an angle Y1 to the side opposite to the side where the left blade driving unit 25a is disposed (right side when viewed from the front direction), and the right blade 23b is connected to the right blade driving unit 25b. It is the figure which showed the condition which inclines at the angle Y1 on the opposite side (the left side when it looks directly from the front direction) with the side arrange | positioned.

  When a predetermined dew condition is satisfied under the situation shown in FIG. 8A, the left blade 23a is limited from the angle Y1 to the angle Y2, and the right blade 23b is similarly limited from the angle Y1 to the angle Y2. This makes it easier for airflow to flow through the side of the left blade 23a located at the leftmost end and the side of the right blade 23b located at the rightmost end, and it is possible to suppress condensation on each blade.

  In addition, since angle Y1 is larger than angle Y2 which is a predetermined limit angle, control was performed to correct the angle and suppress dew. However, dew is generated when angle Y1 is smaller than angle Y2. Therefore, there is no need to perform control for correcting the angle. Further, the angle Y2 is a value calculated in advance from experiments or the like and is not uniquely determined, and can be changed as appropriate.

  As described above, in the present embodiment, when the left blade 23a is inclined to the side opposite to the side on which the left blade drive unit 25a is disposed, the side opposite to the side on which the left blade drive unit 25a is disposed. When the right blade 23b is inclined to the side where the right blade drive unit 25b is disposed, the angle of rotation to the side opposite to the side where the right blade drive unit 25b is disposed is limited. Thus, the occurrence of dew on each blade is suppressed.

  Next, control for suppressing dew in the swing mode will be described. FIG. 9A is a diagram showing one state of the left blade 23a in the swing mode. As shown in FIG. 9A, in the swing mode, the left blade 23a swings left and right by an angle B about the central axis 28a. The angle B is a preset angle.

  Usually, air-conditioning operation is performed according to a predetermined operation mode. One of the modes is a swing mode, which rotates around the predetermined center axis by the same angle to the left and right at a predetermined timing. The central axis may be determined directly by the user using the remote control device 30 or automatically in the direction in which there is a person detected by the infrared sensor 4. As a result, depending on the central axis, even in the swing mode, during the cooling operation, the cool air cools the left blade drive unit 25a through the through hole 26a, and as a result, the left blade drive unit 25a is exposed to dew. Will occur.

  First, in the normal swing mode, it is assumed that the left blade 23a is inclined at an angle Z1 to the side where the left blade drive unit 25a is arranged (left side when viewed directly from the front direction). Then, the axis of the angle Z1 is set as the central axis 28a, and the center axis 28a is rotated to the left and right at an angle B at a predetermined timing.

  Next, when a predetermined dew condition is satisfied, it is determined whether or not the angle Z1 is equal to or larger than the predetermined angle Z2. If the angle is equal to or greater than the predetermined angle Z2, the central axis is corrected so that the central axis 28a becomes the predetermined angle Z2, and control is performed so as to swing left and right at an angle B about the central axis of the angle Z2.

  As a result, the cooling effect on the left blade drive unit 25a can be suppressed, and the occurrence of dew on the left blade drive unit 25a can be suppressed. The angle Z2 may be the same value as the angle X2 described above, or may be a different value. The swing mode of the left blade 23a has been described, but the same applies to the right blade 23b. To suppress the cooling effect on the right blade drive unit 25b, the center of the swing mode is shifted to the opposite side of the right blade drive unit 25b. Correct the axis.

Next, the control of both the left blade 23a and the right blade 23b in combination with the above control will be described. The left blade 23a and the right blade 23b are composed of a plurality of blades. The left blade 23a at the left end and the right blade 23b at the right end will be described with reference to the drawings.

  FIG. 10A is a state diagram in which the left blade 23a and the right blade 23b are in an air conditioning operation by being inclined at an angle W to the right side (right side when viewed directly from the front direction side).

  Next, when a predetermined dew condition is satisfied, first, since the left blade 23a is inclined to the side opposite to the side where the left blade drive unit 25a is disposed, whether or not the angle W is larger than the angle Y2 Judging. When the angle W is larger than the angle Y2, the angle of the left blade 23a is corrected so as to be the angle Y2.

  Similarly, since the right blade 23b is inclined to the side where the right blade driving unit 25b is disposed, it is determined whether or not the angle W is larger than the angle X2. When the angle W is larger than the angle X2, the angle of the right blade 23b is corrected so as to be the angle X2.

  As described above, by varying the correction angle of the left blade 23a and the right blade 23b, dew on the left blade 23a located at the leftmost end is suppressed, and dew on the right blade drive unit 25b is suppressed. can do. 10 (a) and 10 (b) describe the case where both the left blade 23a and the right blade 23b are tilted to the right, but control is also performed with the same concept when tilted to the left. Can do.

  Further, in the present embodiment, the left blade drive unit 25a and the right blade drive unit 25b have a stepping motor and a gear, and when the stepping motor is not driven, a direct current is intermittently applied to one phase of the stepping motor. By applying a voltage, the temperature of the stepping motor is maintained at an abnormal dew point to suppress dew condensation.

  FIG. 11 is a diagram illustrating a state of a voltage applied to the stepping motor. In the present embodiment, when a predetermined dew condition is satisfied and the stepping motor is not driven in a swing mode or the like, a DC voltage is intermittently applied to one phase.

  First, when a predetermined dew condition is satisfied, a DC voltage V (for example, 14 V) is applied to the stepping motor. Then, the DC voltage V is applied for a predetermined motor-on time Ton (for example, 4 seconds). When the motor-on time Ton has elapsed, the voltage is not applied, and the DC voltage is applied for the motor-off time Toff (for example, 6 seconds). Do not multiply. By setting this as one cycle (for example, 10 seconds) and periodically turning on and off the stepping motor, the temperature of the stepping motor can be raised with control that does not impair the reliability as much as possible.

  Then, when the predetermined dew condition is no longer satisfied, the voltage is intermittently applied to the stepping motor.

  As described above, in the present embodiment, by correcting the angle of the left and right wind direction changing blades, it is possible to suppress dew on the drive unit that drives the left and right wind direction changing blades, and further, the left and right wind direction changing blades themselves It is also possible to suppress the dew condensation. In the present embodiment, the left and right blade driving means are arranged on both sides, but the present invention can be applied even when arranged on one side.

As described above, the present invention is not only an air conditioner in which one indoor unit is connected to one outdoor unit, but also a multi-type air conditioner in which a plurality of indoor units are connected to one outdoor unit. Even a machine can be applied.

23 Left and right wind direction changing blades 25 Left and right blade driving means

Claims (5)

An indoor heat exchanger that exchanges heat between the refrigerant and air, a blowout port that blows out the air heat-exchanged by the indoor heat exchanger, and a left and right wind direction change blade that changes the direction of the wind blown from the blowout port to the left and right Left and right blade drive means for driving the left and right wind direction changing blades, and the left and right blade drive means are disposed on both sides or one side of the outlet, and when a predetermined dew condition is satisfied, the left and right blades An air conditioner that restricts rotation of the left and right wind direction changing blades toward the side where the driving means is disposed. The left and right blade driving means includes a motor, and when the predetermined dew condition is satisfied and the left and right wind direction changing blades are not driven, the motor is energized. Air conditioner. The air conditioner according to claim 2, wherein energization of the motor is periodically switched between on and off. The left / right wind direction changing blade has a left / right / left wind direction changing blade located on the left side and a right / left / right wind direction changing blade located on the right side, and the left / right / right direction changing blade is driven independently. The rotation limitation of the left / right / right airflow direction changing blade when the predetermined dew condition is established is different from the rotation limitation of the right / left airflow direction changing blade. The air conditioner according to any one of the above. 5. A swing mode in which the left / right wind direction changing blade is swung with respect to a predetermined center axis is provided, and when the predetermined dew condition is satisfied, the predetermined center axis is corrected. The air conditioner according to any one of the above.