JP2020176803A - Air conditioner - Google Patents

Abstract

To provide an air conditioner that can restrain surging without significantly deteriorating air blowing performance.SOLUTION: An air conditioner comprises: a fan 7 for sucking air from suction ports (2a and 2b); a heat exchanger 6; a discharge port 3 from which heat-exchanged air is discharged; a rear guider 11 and a stabilizer 12 arranged on a downstream side of the fan 7, and forming an air passage 10 for guiding air to the discharge port 3; movable plates (15a and 15b) arranged on the rear guider and/or the stabilizer, and capable of being tilted; and driving devices (17a and 17b) for driving the movable plates. The movable plates comprise protruding parts (18a and 18b) protruding on the side of the air passage.SELECTED DRAWING: Figure 1

Description

The present invention relates to an indoor unit of an air conditioner.

Conventionally, as an air conditioner of this type, for example, one disclosed in Patent Document 1 is known. The air conditioner disclosed in Patent Document 1 is provided on a stabilizer or a rear guider so as to be rotatable or slidable, and is divided into a plurality of left and right in the longitudinal direction for controlling the air volume of the airflow blown from the outlet. It is equipped with an air volume control plate.

Japanese Patent No. 5268668

However, in the conventional configuration, by rotating or sliding the air volume control plate to control the air volume, it is possible to suppress surging that occurs when the fan rotates, but to suppress surging. When the air volume is controlled by using the air volume control plate, it is necessary to operate the air volume control plate greatly, which causes a problem that the air flow performance is greatly deteriorated and the desired air flow performance cannot be obtained.

An object of the present invention is to solve the above-mentioned conventional problems, and to provide an air conditioner capable of suppressing surging without significantly deteriorating the ventilation performance.

In order to explain the above problems, the air conditioner of the present invention includes a suction port, a fan that sucks air from the suction port, a heat exchanger, and an outlet that blows out air that has been heat-exchanged by the heat exchanger. The rear guider and stabilizer, which are located on the downstream side of the fan and form a ventilation path that guides air to the air outlet, and the movable plate, which is arranged on the rear guider and / or the stabilizer and can be tilted, and the drive that drives the movable plate. The device is provided, and the movable plate is provided with a protruding portion protruding toward the ventilation path side.

As a result, when the movable plate is tilted to change the air passages of the rear guider and the stabilizer, the air passages and the air outlets are narrowed, static pressure can be secured, and surging can be suppressed. In addition to this, the flow path is narrowed by providing the protrusion on the ventilation path side of the rear guider and the stabilizer, and the surging suppressing effect can be further obtained. By providing the movable plate with a protruding portion, surging can be suppressed without increasing the amount of movement when the movable plate is tilted, so that deterioration of ventilation performance can be reduced.

According to the present invention, it is possible to provide an air conditioner capable of suppressing generated surging while suppressing a significant deterioration in ventilation performance.

Cross-sectional view showing a state in which the movable plate of the indoor unit of the air conditioner according to the first embodiment is tilted. Enlarged sectional view showing a state in which the movable plate of the indoor unit of the air conditioner is tilted. Cross-sectional view showing a state in which the fan of the indoor unit of the air conditioner is stopped. Cross-sectional view showing a state in which the fan of the indoor unit of the air conditioner rotates and the movable plate is not tilted. A perspective view showing a movable plate attached to the rear guider of the indoor unit of the air conditioner and a protruding portion protruding into the ventilation path. A perspective view showing a state in which a movable plate and a driving device are attached to the rear guider of the indoor unit of the air conditioner. A perspective view showing a state in which the movable plate and the drive device attached to the rear guider of the indoor unit of the air conditioner are integrated. A cross-sectional view showing a movable plate attached to the rear guider of the indoor unit of the air conditioner according to the second embodiment, a state in which a part of the driving device is covered with a space inside a protruding portion provided on the movable plate, and A cross-sectional view showing how the movable part is tilted by driving the drive device. Perspective view showing the state of the rear guider of the indoor unit of the air conditioner according to the third embodiment. A cross-sectional view showing how the movable plate of FIG. 9 is tilted.

The first invention is arranged and blown on the downstream side of a suction port, a fan that sucks air from the suction port, a heat exchanger, an air outlet from which the air exchanged by the heat exchanger is blown out, and a fan. The movable plate is provided with a rear guider and a stabilizer forming a ventilation path for guiding air to the outlet, a movable plate arranged on the rear guider and / or the stabilizer and capable of tilting, and a drive device for driving the movable plate. It is an air conditioner characterized by having a protruding portion protruding to the road side.

As a result, when the movable plate is tilted to change the air passages of the rear guider and the stabilizer, the air passages and the air outlets are narrowed, static pressure can be secured, and surging can be suppressed. In addition to this, the flow path is narrowed by providing the protrusion on the ventilation path side of the rear guider and the stabilizer, and the surging suppressing effect can be further obtained. By providing the movable plate with a protruding portion, surging can be suppressed without increasing the amount of movement when the movable plate is tilted, so that deterioration of ventilation performance can be reduced.

The second invention is characterized in that the protruding portion of the first invention is provided at least on one end side in the left-right direction of the ventilation path. As a result, since the protruding portion is provided on one end side of the ventilation passage, the deterioration of the ventilation performance is small as compared with the case where it is located in the central portion of the ventilation passage. Further, since it is on one end side, it becomes easy to arrange the drive device when it is arranged in the space provided inside the protruding portion, the configuration is simple, and the drive can be easily carried out.

The third invention is characterized in that at least a part of the driving device of the first or second invention is located outside the movable plate in the left-right direction.

As a result, since the drive device is located on the outer side of the movable plate in the left-right direction, the configuration of the protrusion can be considered without worrying about the arrangement of the drive device, and the shape and size of the protrusion can be arbitrarily determined. can do.

The fourth invention is characterized in that, in particular, the protrusions of the first to third inventions are provided with a space inside so as to cover at least a part of the driving device.

As a result, the drive device can be arranged in the space of the protruding portion on the opposite side of the ventilation path, and the space inside the protruding portion can be effectively used. Further, since the drive device is inside the protruding portion and does not protrude into the ventilation path, it does not become a ventilation resistance at the time of ventilation, so that high performance of ventilation performance can be realized.

A fifth aspect of the invention is characterized in that the stabilizers and / or rear guiders of the first to fourth inventions further include a rear guider protrusion and / or a stabilizer protrusion that protrudes toward the ventilation path side.

As a result, the shape and size of the protruding portion can be arbitrarily determined without being limited by the arrangement and size of the movable plate, and the surging suppression effect can be enhanced.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to this embodiment.

(Embodiment 1)
The air conditioner according to the first embodiment of the present invention is a so-called separate type air conditioner in which the indoor unit and the outdoor unit are connected to each other by a refrigerant pipe, a control wiring, or the like. A heat pump is composed of an indoor unit and an outdoor unit, and the outdoor unit is provided with a compressor. The indoor unit is a wall-mounted indoor unit that is attached to the wall surface of the room.

FIG. 1 is a cross-sectional view showing a state in which the movable plate of the indoor unit of the air conditioner according to the first embodiment of the present invention is tilted. FIG. 2 is an enlarged cross-sectional view showing a state in which the movable plate of the indoor unit is tilted. FIG. 3 is a cross-sectional view showing a state in which the fan of the indoor unit is stopped. FIG. 4 is a cross-sectional view showing a state in which the fan of the indoor unit is rotated and the movable plate is not tilted. FIG. 5 is a perspective view showing a schematic configuration of a movable plate attached to the rear guider of the indoor unit and a protruding portion protruding into the ventilation passage. FIG. 6 is a perspective view showing a state in which a movable plate and a driving device are attached to the rear guider of the indoor unit. FIG. 7 is a perspective view showing a state in which the movable plate attached to the rear guider of the indoor unit and the drive device are integrated.

In FIGS. 1, 3 and 4, the main body 1 of the indoor unit includes a front opening 2a and a top opening 2b serving as an air suction port, an outlet 3 for blowing out heat-exchanged air, and a front panel 4. ..

Inside the main body 1 of the indoor unit, there is a filter 5 for removing dust contained in the indoor air, a heat exchanger 6 for heat exchange of the taken indoor air, and an air outlet for heat exchange with the heat exchanger 6. The operation of the fan 7, which is a once-through fan that generates an air flow from 3 to the room, the motor 8 that drives the fan 7 (described in FIGS. 5 and 6), the motor 8, and other components described below. A control device 9 for controlling is provided.

Further, in the main body 1 of the indoor unit, the ventilation passage 10 from the downstream side of the fan 7 to the upstream side of the air outlet 3 is arranged on the downstream side of the fan 7 to guide the air flow, and the rear guider 11 and the rear guider 11. It is formed by a stabilizer 12 arranged so as to face each other and inner walls (not shown) on both side surfaces of the main body 1 of the indoor unit.

The air outlet 3 is provided with lower blades 13a and upper blades 13b, respectively, as vertical wind direction changing blades that open and close the air outlet 3 and change the air blowing direction in the vertical direction. Left and right wind direction changing blades 14 that can change the wind direction in the left-right direction when blowing out the air around the inside or the vertical wind direction changing blades 13a and 13b are provided.

A movable rear guider 15a and a movable stabilizer 15b, which are movable plates for rotating, are provided on a part of the air passage 10 side (or the air outlet 3 side) of the rear guider 11 and the stabilizer 12, respectively. On the side of the stabilizer 12 opposite to the ventilation path 10 side, drive devices 17a and 17b for rotating the movable rear guider 15a and the movable stabilizer 15b are provided, respectively, and the drive devices 17a and 17b and the movable plate 15a, respectively. The rotation centers of 15b are fastened by the shafts 16a and 16b, respectively. (Enlarged view in Fig. 2 and integrated view in Fig. 7)

Further, at the left-right ends of the movable plates 15a and 15b, protrusions 18a and 18b protruding toward the ventilation passage 10 side (or the air outlet 3 side) are provided, respectively. The protruding portions 18a and 18b are interlocked with the rotation of the movable portions 15a and 15b.

The operation and operation of the air conditioner configured as described above will be described below.

When the operation is started from the state where the air conditioner is stopped as shown in FIG. 3, the vertical wind direction changing blades 13a and 13b rotate and open as shown in FIG. 1, and the front opening 2a and the upper surface opening are opened. The wind sucked from the portion 2b passes through the filter 5 and the heat exchanger 6, passes through the ventilation passage 10, and is blown out from the air outlet 3. The wind blown out can be sent to any place in the room by the vertical wind direction changing blades 13a and 13b and the left and right wind direction changing blades 14 changing the wind direction in the vertical direction and the horizontal direction, respectively.

Here, when the fan 7 rotates and the wind is blown from the outlet 3, for example, if dust or dirt accumulates on the filter 5 and the ventilation resistance increases, sufficient static pressure cannot be secured. The wind blown out from the air outlet 3 flows backward to generate a pulsation called surging, which may cause an intermittent abnormal sound of rustling, or may cause dew or dripping.

On the other hand, the rear guider 11 and the stabilizer 12 are provided with a movable rear guider 15a and a movable stabilizer 15b, respectively, and these are rotated to change the flow path of the rear guider and the stabilizer to narrow the flow path of the ventilation passage 10 or the air outlet 3. Then, the static pressure can be secured and the backflow of the wind blown from the outlet 3 can be suppressed to a certain extent, so that the surging can be suppressed to a certain extent, the generation of an abnormal noise of rustling is suppressed, and dew condensation and dripping are prevented. It becomes possible. In addition, since the static pressure can be improved and a stable flow field can be formed, turbulence can be reduced and noise can be reduced.

Specifically, as shown in FIGS. 1 and 2, when the movable rear guider 15a and the movable stabilizer 15b, which are movable plates, are rotated around the shafts 16a and 16b by the driving of the driving devices 17a and 17b, the movable rear guider 15a becomes The movable stabilizer 15b moves upward and downward, narrows the flow path of the ventilation passage 10 or the air outlet 3, respectively, and can increase the static pressure, thereby obtaining a surging suppressing effect. On the contrary, when the movable rear guider 15a moves downward and the movable stabilizer 15b moves upward, the flow paths of the ventilation passage 10 or the air outlet 3 can be expanded to improve the ventilation performance. (Fig. 4)

However, although the effect of suppressing surging can be obtained by narrowing the flow path of the ventilation passage 10, the ventilation resistance increases, so that the ventilation performance may be deteriorated depending on the size of the air volume. In particular, the fan 7 rotates at high speed. In the case of rotation, the rotation of the movable rear guider 15a and the movable stabilizer 15b has a large influence on the wind flowing through the ventilation passage 10, and the ventilation performance may be significantly deteriorated. Surging tends to occur strongly when the fan 7 rotates at a low rotation speed because it is difficult to secure static pressure, but it may also occur when the fan 7 rotates at a high rotation speed depending on the shape of the ventilation passage 10. is there.

Here, if the movable rear guider 15a and the movable stabilizer 15b are provided with protrusions 18a and 18b, respectively, the flow paths of the ventilation passage 10 and the air outlet 3 are narrowed to increase the static pressure while minimizing the resistance to the wind flow. Therefore, the effect of suppressing surging can be obtained without rotating the movable rear guider 15a and the movable stabilizer 15b, just as the movable rear guider 15a and the movable stabilizer 15b can be rotated to obtain the effect of suppressing surging. Obtained to a certain extent.

Therefore, by providing the movable rear guider 15a and the movable stabilizer 15b with the protrusions 18a and 18b, when the movable rear guider 15a and the movable stabilizer 15b are tilted to suppress the looseness, these are due to the effect of the protrusions 18a and 18b. The amount of operation can be reduced as compared with the case where there is no. As a result, surging can be suppressed without significantly deteriorating the ventilation performance.

In particular, for relatively small surging such as surging that occurs when the fan 7 rotates at a high speed, the movable rear guider 15a and the movable stabilizer 15b can be eliminated by the effect of the protrusions 18a and 18b without rotating. It is also possible to suppress the deterioration of the ventilation performance.

In order to suppress surging, the movable rear guider 15a and the movable stabilizer 15b have the shape of the ventilation passage 10, the pressure loss of the filter 5 and the heat exchanger 6, regardless of whether one of them is provided or both of them are provided. Or, the effect can be obtained depending on the situation such as the ability of the fan 7.

The movable rear guider 15a and the movable stabilizer 15b arranged on the rear guider 11 and the stabilizer 12 rotate according to the rotation speed of the fan 7, respectively. Specifically, the rotation angles of the movable rear guider 15a and the movable stabilizer 15b are set in advance according to the rotation speed of the fan 7, and when the fan 7 has a predetermined rotation speed, the instruction of the control device 9 is used. The drive devices 17a and 17b are driven, and the movable rear guider 15a and the movable stabilizer 15b are rotated to realize a predetermined rotation angle.

As an example of controlling the rotation operation of the movable rear guider 15a and the movable stabilizer 15b according to the rotation speed of the fan 7, the fan 7 rotates when the fan 7 rotates in a predetermined rotation speed or a rotation speed range of a predetermined width. It is conceivable to control the angle to be the largest, and in other rotation speeds or rotation speed ranges, the rotation speed is gradually reduced as the rotation speed becomes smaller or conversely, as the rotation speed becomes larger. As a result, in the rotation speed or the rotation speed range where surging occurs, the rotation angle is increased to suppress this, and at other rotation speeds, the rotation angle is decreased or rotation is performed as shown in FIG. By setting the angle to 0 °, that is, by preventing it from rotating, it is possible to secure the ventilation performance, and it is possible to improve energy saving and comfort.

The rotation angle of the movable rear guider 15a and the movable stabilizer 15b can be set to any angle from the maximum angle to 0 °, and the larger the rotation angle, the greater the surging suppression effect. On the other hand, the smaller the rotation angle, the better the ventilation performance, and the more energy saving and comfort can be improved. In addition to the method of rotating the movable rear guider 15a and the movable stabilizer 15b at an arbitrary angle from the maximum angle to 0 °, there is also a method of moving only to both the maximum angle and 0 °.

As described above, as a specific rotation angle determination method of the method of determining the rotation angle according to the rotation speed of the fan 7 or the rotation speed range, the fan efficiency defined by the following equation is movable so as to be maximized. There is a method of controlling the operation of the rear guider 15a and the movable stabilizer 15b. That is, dP is the pressure loss (pressure loss of the air passage from the suction port to the outlet), Q is the air volume from the suction port, n is the fan speed, and T is the torque (output supplied from the motor 8 to the fan 7). If W is defined as a motor input, the fan efficiency η can be defined as η = (dP * Q) / (n * T) ≒ Q / W, so that the movable rear guider 15a and the movable rear guider 15a that maximize the fan efficiency η are movable. The rotation angle of the stabilizer 15b is set in advance.

In this way, the movable rear guider 15a and the movable stabilizer 15b are tilted so that the fan efficiency η is maximized according to the rotation speed or the rotation speed range of the fan 7, so that the motor input can be reduced while suppressing surging. As a result, energy saving can be achieved.

Here, since it is difficult to measure the pressure loss dP and the torque T, it is possible to simply measure the air volume Q and the motor input W and evaluate them by η≈Q / W. In this case, the fan efficiency η is substantially maximum.

Normally, when the flow path is in the optimum state for the ventilation performance, if the movable plate is tilted to narrow the flow path, the static pressure is increased but the ventilation performance is deteriorated. On the other hand, for example, when the ventilation resistance increases due to the accumulation of dust or dirt on the filter 5, it may be possible to maximize the fan efficiency by narrowing the flow path to some extent.

As described above, when the rotation angles of the movable rear guider 15a and the movable stabilizer 15b are determined in advance according to the rotation speed or the rotation speed range of the fan 7, and the drive devices 17a and 17b are controlled accordingly, the rotation angles are determined in advance. The rotation angle may be determined by assuming that the ventilation resistance increases due to the accumulation of dust or dirt on the filter 5, or by assuming that the ventilation resistance does not increase. But it's okay.

In FIGS. 1 to 8, by providing the protruding portion 18a at the left-right end (right side in the figure) of the ventilation passage 10 (outlet 3), deterioration of ventilation performance can be minimized. Further, since it is on one end side, when arranging the drive device 17a in the space provided inside the protrusion 18a, it becomes easy to arrange while effectively using the space, the configuration is simple, and the drive is easily carried out. As shown in FIGS. 1 to 4 and 6 to 7, since the drive device 17a is located outside the movable rear guider 15a in the left-right direction, the configuration of the protruding portion can be considered without worrying about the arrangement of the drive device. Therefore, the shape and size of the protruding portion can be arbitrarily determined.

The shape of the protruding portion 18a may be a trapezoid, a triangular pyramid, a ski jumping hill, or the like, in addition to a part of the arc as shown in FIGS. 1 to 7.

It should be noted that the protrusions 18a and 18b have the shape of the ventilation passage 10, the filter 5 and the heat exchanger 6 regardless of whether one of the protrusions 18a and 18b is provided or both of them are provided in order to suppress surging. Each effect can be obtained depending on the situation such as pressure loss or the capacity of the fan 7.

Further, the positions of the protruding portions 18a and 18b may be provided not only at the right end in the left-right direction as shown in FIGS. 5 to 7 but also at the left end or the central portion other than that in order to suppress surging. Any of these combinations can be effective depending on the shape of the ventilation passage 10, the pressure loss of the filter 5 and the heat exchanger 6, the capacity of the fan 7, and the like.

In FIG. 5, since the protrusion 18a is located on the movable rear guider 15a, when the movable rear guider 15a tilts, the protrusion 18a also moves in conjunction with the tilt, whereby the movable plate and the protrusion are integrated. Since it is formed, it is not necessary to drive both of them, the configuration is simple, and the driving can be easily performed. The same can be said for the protrusion 18b and the movable stabilizer 15b.

An example of a method of attaching the movable rear guider 15a and the drive device 17a to the rear guider 11 will be described with reference to FIGS. 6 and 7. First, the shaft on the left side of the movable rear guider 15a is passed through a bearing (not shown) on the left side of the rear guider 11, the movable rear guider 15a is placed at a predetermined position, and then the drive device 17a is placed on the ventilation path 10 side of the rear guider 11. Prepare on the right side opposite to the above, and attach the shaft 16a of the drive device 17a to the bearing (not shown) on the right side of the movable rear guider 15a while passing it through the shaft hole (not shown) on the right side of the rear guider 11. By doing so, both can be concluded. After fastening, the drive device 17a is fixed to the side of the rear guider 11 opposite to the ventilation passage 10. According to this method, the movable rear guider 15a and the drive device 17a can be easily attached to the rear guider 11, the positioning can be performed with high accuracy, and the movable rear guider 15a can be easily removed.

In the present embodiment, the case where the movable rear guider 15a and the drive device 17a are fastened to the rear guider 11 will be described, but the same method is used when the movable stabilizer 15b and the drive device 17b are fastened to the stabilizer 12. ..

Here, the movable rear guider 15a and the movable stabilizer 15b may each be composed of one plate or may be divided into a plurality of plates. In the case of one piece, it can be easily fastened when it is fastened to the drive devices 17a and 17b, and it is easy to control when it is rotated by the drive devices 17a and 17b. Further, when the ventilation passage 10 is divided into a plurality of parts, the movable rear guider 15a or the movable stabilizer 15b can be tilted only in the left-right longitudinal direction of the ventilation passage 10 where static pressure cannot be secured, and the surging suppression effect can be obtained. While obtaining it, it is possible to minimize the deterioration of the ventilation performance.

In FIGS. 1 and 2, the vertical angles of the vertical wind direction changing blades 13a and 13b are shown as an example, but when the rotation angles of the vertical wind direction changing blades 13a and 13b change, the wind flowing through the ventilation passage 10 Therefore, changing the rotation angle of the movable rear guider 15a and the movable stabilizer 15b accordingly is effective in suppressing surging and improving the ventilation performance.

The left and right wind direction changing blades 14 in FIGS. 1 to 4 are described in the figure arranged on the vertical wind direction changing blades 13a, but the left and right wind direction changing blades 14 are arranged in other places such as the rear guider 11 and the stabilizer 12. However, the same effect can be obtained.

By combining the shapes and sizes of the protrusions 18a and 18b, the shape, length and rotation angle of the movable rear guider 15a, and the shape, length and rotation angle of the movable stabilizer 15b, the ventilation performance can be improved. Since it is possible to change both the energy saving effect and the surging suppression effect that accompany it, it is possible to arbitrarily bring out the effects of both by combining these.

In FIGS. 1, 3 and 4, the front panel 4 is in close contact with the main body 1 of the indoor unit both when the fan 7 is rotating and when the fan 7 is stopped, but the fan 7 is stopped. When the time is closed and the fan 7 rotates, the front panel 4 moves to the front side and opens with a gap between it and the main body 1 of the indoor unit (not shown), the front of the suction port. The amount of air sucked from the opening 2a increases. Therefore, even when the ventilation resistance increases due to the accumulation of dust or dirt on the filter 5, if the front panel 4 can be opened to secure the suction area, the deterioration of the ventilation performance due to the increase in the ventilation resistance can be compensated. Therefore, if the front panel 4 can be opened and closed, the performance can be improved by combining the opening and closing of the front panel 4, the shape and size of the protruding portion, and the shape, length, and rotation angle of the movable rear guider 15a and the movable stabilizer 15b. It is possible to arbitrarily bring out both the effect of saving energy and the effect of suppressing surging.

In the present embodiment, since the air conditioner in the so-called lower blowout mode in which the outlet 3 is located below the fan 7, the drive device 17a for tilting the movable rear guider 15a includes the protrusion 18a and the rear guider 11. The drive device 17b, which is located on the lower side of the ventilation passage 10 and tilts the movable stabilizer 15b, is located on the protrusion 18b, the stabilizer 12, and the upper side of the ventilation passage 10, but the outlet 3 is a fan in a different form. In the case of an upper blowout type air conditioner (not shown) located above 7, the drive device 17a is driven to the upper side of the protrusion 18a rear guider 11 and the ventilation passage 10 because the vertical positional relationship is reversed. The device 17b is located below the protrusion 18b, the stabilizer 12, and the ventilation passage 10.

(Embodiment 2)
In FIG. 8, the movable plate attached to the rear guider of the indoor unit of the air conditioner according to the second embodiment of the present invention and the protruding portion provided on the movable plate operate in conjunction with each other by driving the drive device. It is sectional drawing which shows the state. In FIG. 8, 19 is a transmission means for transmitting the driving force of the driving device 17a to the movable rear guider 15a, and connects the shaft 16a of the driving device 17a and the shaft 16c of the movable rear guider 15a.

The operation and operation of the air conditioner configured as described above will be described below only in a portion different from that of the first embodiment. The drive device 17a is inside the protrusion 18a when the movable rear guider 15a is not tilted (FIG. 8A), and when the drive device 17a is driven, the force is transmitted to the movable rear guider 15a via the transmission means 19. , The movable rear guider 15a tilts (FIG. 8 (b)).

When the movable rear guider 15a is not tilted, the drive device 17a is inside the protrusion 18a, so that the space can be effectively used as compared with the case where the drive device 17a is arranged at a different location from the protrusion 18a. .. Since the drive device 17a is inside the protrusion 18a in this way, the drive device 17a does not protrude excessively into the ventilation passage 10 or the air outlet 3, so that the ventilation resistance does not occur and the ventilation performance is not deteriorated.

The shape and size of the protrusion 18a is such that the drive device 17a can be housed inside while surging can be suppressed and prevented, and the deterioration of the ventilation performance is minimized. The same can be said for the positional relationship between the drive device 17b provided on the movable stabilizer 15b and the protruding portion 18b.

(Embodiment 3)
FIG. 9 is a perspective view showing a state of a rear guider of an indoor unit of an air conditioner according to a third embodiment of the present invention. FIG. 10 is a cross-sectional view showing how the movable plate of FIG. 9 is tilted. In FIG. 9, the protruding portion 18a is partially provided on the rear guider 11 and a part on the movable rear guider 15a.

The operation and operation of the air conditioner configured as described above will be described below only for parts different from those of the first and second embodiments. When the movable rear guider 15a is divided and the movable rear guider 15a is not tilted, the protrusion 18a is configured so that the flow path of the ventilation passage 10 or the air outlet 3 is not narrowed while partially cutting out, and suppresses surging (FIG. 10). (A)). Further, when the movable rear guider 15a is tilted, the width of the cut portion is absorbed and the surging suppression effect is achieved by narrowing the flow path of the ventilation and 10 or the outlet 3 as in the case where the movable rear guider 15a is not tilted. Therefore, it is not necessary to increase the operating amount of the movable rear guider 15a. Further, since a part of the rear guider 11 is provided, the shape and size of the protruding portion 18a can be arbitrarily determined without being limited by the arrangement and size of the movable rear guider 15a, and the surging suppressing effect can be obtained. It is possible to increase. The same can be said for the positional relationship between the drive device 17b provided on the movable stabilizer 15b and the protruding portion 18b.

As described above, in the air conditioner according to the present invention, a protrusion and a movable plate are provided on the stabilizer and the rear guider forming the ventilation path of the indoor unit to respond to the change in the fan rotation speed, that is, the change in the air volume. By tilting the movable plate, energy efficiency can be improved, which is useful for air conditioners used for business use and general households.

1 Main body of indoor unit 2a Front opening (suction port)
2b Top surface opening (suction port)
3 Air outlet 4 Front panel 5 Filter 6 Heat exchanger 7 Fan 8 Motor 9 Control device 10 Ventilation path 11 Rear guider 12 Stabilizer 15a Movable rear guider (movable plate)
15b Movable stabilizer (movable plate)
16a, 16b Shaft 17a, 17b Drive device 18a, 18b Projection

Claims (5)

The suction port, the fan that sucks air from the suction port, the heat exchanger, the air outlet from which the air exchanged by the heat exchanger is blown out, and the outlet located on the downstream side of the fan to the air outlet. The movable plate is provided with a rear guider and a stabilizer forming a ventilation path for guiding air, a movable plate arranged on the rear guider and / or the stabilizer and capable of tilting, and a drive device for driving the movable plate. An air conditioner characterized in that the air conditioner is provided with a protruding portion protruding toward the ventilation path side. The air conditioner according to claim 1, wherein the protruding portion is provided at least on one end side in the left-right direction of the ventilation path. The air conditioner according to claim 1 or 2, wherein at least a part of the drive device is located outside the movable plate in the left-right direction. The air conditioner according to any one of claims 1 to 3, wherein the protruding portion is provided with a space inside so as to cover at least a part of the driving device. The air conditioner according to any one of claims 1 to 4, wherein the rear guider and / or the stabilizer further includes a rear guider protrusion and / or a stabilizer protrusion that protrudes toward the ventilation path side.

Images