JP2000111079A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To operate a cross-flow fan even for pressure characteristics corresponding to the ventilation resistance in an air channel and to control decrease of air supply efficiency and increase of noise easily. SOLUTION: The air conditioner includes an indoor unit comprising an unit housing 1 provided internally with an air channel 4 interconnecting an air inlet 2 and an air outlet 3, a heat exchanger 5 disposed in the air channel 4, an air filter 6 disposed in the air channel 4 on the upstream side of the heat exchanger 5, and a cross-flow fan 7 disposed in the air channel 4 on the downstream side of the heat exchanger 5, wherein the air flow-in area of the cross- flow fan 7 is enlarged/contracted depending on the ventilation resistance in the air channel 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner, and more particularly to a structure and operation control of an indoor unit provided in the air conditioner.

[0002]

2. Description of the Related Art Some air conditioners include an indoor unit mounted on a wall surface of a room to be air-conditioned and an outdoor unit installed outside the room. Generally, it has an internal structure as shown in FIG. That is, the indoor unit includes the unit casing 51, and the unit casing 51
Inside, an air inlet 52 formed in the upper part and the front part of the unit casing 51 and an air outlet 53 formed in the lower part.
An air flow passage 54 is provided for communication between the air passages.
A heat exchanger 55 that dehumidifies and cools the room air sucked from the air suction port 52 during cooling and generates air-conditioned air during heating during heating is arranged in the air passage 54. The air filter 56 is disposed in the air flow passage 54 upstream of the heat exchanger 55, while the indoor air is sucked in the air flow passage 54 downstream of the heat exchanger 55. A cross-flow fan 57 that passes through the heat exchanger 55 and blows out the generated conditioned air from the air outlet 53 into the room is provided.

In this case, the unit housing 51
A rear guide 58 and a stabilizer 59 which are a part of the air flow path 54 are provided between the air outlet 53 and the cross flow fan 57, and the inner ends of the rear guide 58 and the stabilizer 59, that is, the cross flow The fan side end is disposed close to the cross flow fan 57. Note that the rear guider 58 and the stabilizer 59
Are fixed in position, and they cannot be moved. Although not shown in the drawings, it is common that horizontal and vertical wind direction plates, so-called louvers, are arranged in the air outlet 53. Depending on these louvers, the air outlet 53 may be used.
The blowing direction of the conditioned air blown out from the room toward the room is to be adjusted.

[0004]

However, in the indoor unit according to the above-mentioned conventional form, regardless of which of the heating operation, the cooling operation, the dehumidifying operation, and the air blowing operation,
The following inconveniences were to occur. That is, when the cross flow fan 57 is operated, the room air is sucked by the cross flow fan 57 from the air inlet 52 of the unit housing 51 while passing through the air filter 56 and the heat exchanger 55. The heat is exchanged while passing through the exchanger 55 to form conditioned air, which is then blown out from the air outlet 53. However, since the room air contains dust and dirt floating in the room, Dust and dirt adhere to the heat exchanger 55 and the air filter 56. Then, the heat exchanger 55 and the air filter 5
If dust and dirt adhere to the air passage 6, the airflow resistance in the air flow path 54 increases, which may cause a reduction in air blowing efficiency and an increase in noise.

[0005] Regardless of whether dust or dirt adheres to the heat exchanger 55 or the air filter 56, dew condensation occurs in the heat exchanger 55 during the cooling operation. As a result, the ventilation resistance in the air passage 54 is increased, so that the ventilation efficiency is reduced and the noise is increased.

By the way, according to the study by the inventor of the present invention, the correlation diagram of FIG. 1, that is, the static pressure (mmA
q) and the amount of air (m ³ / min) were obtained as shown in the diagram showing the correlation. That is, when the adhesion of dust and dew condensation are small and the ventilation resistance in the air passage 54, that is, the static pressure is lower than a certain value (about 1.6 mmAq in FIG. 1), the air inflow of the cross flow fan 57 is performed. The larger the area, the larger the air volume. On the other hand, if the static pressure in the air passage 54 becomes higher than about 1.6 mmAq due to the attachment of dust and condensation, the air inflow area of the cross flow fan 57 becomes larger. The fact is that the smaller the air volume, the higher the air volume. In FIG. 1, the case where the air inflow area of the cross flow fan 57 is small is indicated by a solid line, and the case where the air inflow area is large is indicated by a broken line. If the static pressure in the air flow path 54 is the same, The greater the air volume, the better the air blowing efficiency,
And the noise will be reduced.

The present invention has been made based on such knowledge, and it is possible to operate a cross flow fan with a pressure characteristic corresponding to a ventilation resistance in an air flow path, and It is an object of the present invention to provide an air conditioner having a configuration capable of easily suppressing a decrease in blowing efficiency and an increase in noise.

[0008]

According to a first aspect of the present invention, there is provided an air conditioner comprising: a unit housing provided with an air flow passage for connecting and connecting an air inlet and an air outlet; A heat exchanger arranged in the flow path, an air filter arranged in the air flow path upstream of the heat exchanger, and an air filter arranged in the air flow path downstream of the heat exchanger And an indoor unit including a cross flow fan, wherein an air inflow area of the cross flow fan is adjusted in accordance with a ventilation resistance in the air flow path. It is characterized by having a configuration.

An air conditioner according to a second aspect of the present invention is the air conditioner according to the first aspect, wherein a part of an air flow path is provided between an air outlet of a unit housing and a cross flow fan. A rear guider and a stabilizer are provided, and as at least one of the rear guider and the stabilizer moves toward the air outlet, the air inflow area of the crossflow fan is enlarged, and It is characterized in that the air inflow area of the cross flow fan is reduced as at least one of the rear guider and the stabilizer moves in a direction away from the air outlet.

An air conditioner according to a third aspect of the present invention is the air conditioner according to the first aspect, wherein a part of an air flow path is provided between an air outlet of a unit housing and a cross flow fan. A rear guider is provided, and an extension member capable of moving forward and backward is attached to an end of the rear guider on the crossflow fan side. With the extension member moving backward in a direction approaching the air outlet, While the air inflow area of the cross flow fan is enlarged, the air inflow area of the cross flow fan is reduced as the extension member moves forward in a direction away from the air outlet. There is a feature.

An air conditioner according to a fourth aspect of the present invention is the air conditioner according to the first aspect, wherein a part of an air flow path is provided between an air outlet of a unit housing and a cross flow fan. A rear guider is provided, and a swingable extension member is attached to a cross flow fan side end of the rear guider, so that the extension member swings in a direction approaching the cross flow fan. Accordingly, the air inflow area of the cross flow fan is reduced,
It is characterized in that the air inflow area of the cross flow fan is enlarged as the extension member swings in a direction away from the cross flow fan.

An air conditioner according to a fifth aspect of the present invention is the air conditioner according to any one of the first, third, and fourth aspects, wherein an air outlet of a unit housing and a cross flow fan are connected. A stabilizer serving as a part of an air flow path is provided between the two, and an extension member capable of moving forward and backward is attached to a cross flow fan side end of the stabilizer, and the extension member approaches the air outlet. While the air inflow area of the crossflow fan is enlarged as the airflow area moves backward in the direction, the crossflow air moves as the extension member moves forward in the direction away from the air outlet. The air inlet area of the fan is reduced.

An air conditioner according to a sixth aspect of the present invention is the air conditioner according to any one of the first, third, and fourth aspects, wherein an air outlet of a unit housing and a cross flow fan are provided. A stabilizer serving as a part of the air flow path is provided between the two, and a swingable extending member is attached to a cross flow fan side end of the stabilizer, and the extending member is connected to the cross flow fan. As the air inflow area of the cross flow fan is reduced along with the swinging operation toward the approaching direction, as the extension member swings in the direction away from the cross flow fan. The cross flow fan is characterized in that the air inflow area is enlarged.

An air conditioner according to a seventh aspect of the present invention is the air conditioner according to any one of the first to sixth aspects, wherein a static pressure corresponding to a ventilation resistance is detected in the air flow path. A pressure detecting means is provided, and the air inflow area of the cross flow fan is adjusted in accordance with the detected static pressure. An air conditioner according to an eighth aspect of the present invention is the air conditioner according to any one of the first to sixth aspects, wherein an air flow rate is detected in an air flow path on the upstream or downstream side of the cross flow fan. A flow velocity detecting means is provided, and the air inflow area of the cross flow fan is adjusted in accordance with the detected air velocity.

An air conditioner according to a ninth aspect of the present invention is the air conditioner according to any one of the first to sixth aspects, wherein a rotation number detecting means for detecting the rotation number of the cross flow fan is provided. The cross-flow fan is characterized in that the air inflow area is adjusted in accordance with the detected rotation speed. An air conditioner according to a tenth aspect of the present invention is the air conditioner according to any one of the first to sixth aspects, wherein an operation time integrating means for integrating the operating time of the cross flow fan is provided, It is characterized in that the air inflow area of the cross flow fan is scaled and adjusted in accordance with the accumulated operation time.

An air conditioner according to an eleventh aspect of the present invention is the air conditioner according to the fourth or sixth aspect, wherein the extension member is moved by a driving means made of a shape memory alloy or a bimetal which is deformed according to a temperature condition. It is characterized by being operated. An air conditioner according to a twelfth aspect of the present invention is the air conditioner according to the fourth or sixth aspect, wherein the extension member is made of a shape memory alloy or a bimetal that deforms according to a temperature condition. It is characterized by:

According to the above configuration, the configuration is adopted in which the air inflow area of the cross flow fan is scaled up or down in accordance with the ventilation resistance in the air flow path. When the static pressure corresponding to the ventilation resistance in the inside is lower than a certain value, that is, at low static pressure, the air inflow area of the cross flow fan is enlarged and the air volume is increased, but with the adhesion of dust and condensation When the static pressure in the air flow path is higher than a certain value, that is, when the static pressure is high, it is possible to increase the air volume while reducing the air inflow area of the cross flow fan. And since it is possible to operate the cross flow fan with the pressure characteristics corresponding to the ventilation resistance in the air flow path, the operation of such a cross flow fan reduces the ventilation efficiency and increases the noise. Can be easily suppressed.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments according to the present invention will be described below with reference to the drawings.
The correlation diagram illustrated in FIG. 1, that is, the static pressure (mmA) when the air inflow area of the cross flow fan changes.
q) and the air volume (m ³ / min) were created based on the knowledge clarified by the diagram showing the correlation. The air conditioner according to any of the embodiments also includes a unit housing in which an air flow path for connecting and connecting the air suction port and the air blowout port is provided, and a heat exchanger disposed in the air flow path. And an air filter disposed in an air flow path upstream of the heat exchanger, and a cross flow fan disposed in an air flow path downstream of the heat exchanger. A unit is provided, and the air inflow area of the cross flow fan is configured to be adjusted in accordance with the ventilation resistance in the air flow path.

(Embodiment 1) FIG. 2 is a cross-sectional view showing the internal structure of an indoor unit provided in an air conditioner according to Embodiment 1 and is inside a unit housing 1 provided in the indoor unit. Are air inlets 2 formed in the upper and front portions of the unit housing 1 and air outlets 3 formed in the lower portion.
An air flow path 4 is provided for communicating between the air passages. A heat exchanger 5 that dehumidifies and cools the room air sucked from the air suction port 2 during cooling and generates air-conditioned air during heating during heating is arranged in the air flow path 4. The air filter 6 is disposed in the air flow path 4 upstream of the heat exchanger 5, while indoor air is sucked in the air flow path 4 downstream of the heat exchanger 5. A cross-flow fan 7 that passes through the heat exchanger 5 and blows out the generated conditioned air from the air outlet 3 of the unit housing 1 into the room is arranged.

At this time, a rear guide 8 and a stabilizer 9 which are a part of the air flow path 4 are provided between the air outlet 3 of the unit housing 1 and the cross flow fan 7. The inner end of each stabilizer 9, that is, the end on the crossflow fan side, is arranged close to the crossflow fan 7. Further, an extension member 11 configured to be able to move forward and backward is attached to an end of the rear guider 8 on the crossflow fan side so as to overlap with each other. The extension member 11 is provided via a rack and pinion mechanism 12. Drive motor 13
Is to be moved forward and backward.

When the extension member 11 is moved backward in the direction approaching the air outlet 3 of the unit housing 1 via the rack and pinion mechanism 12 by using the drive motor 13, the Flow fan 7
The air inflow area of the cross flow fan 7 is reduced when the extension member 11 is moved forward in the direction away from the air outlet 3. become. That is, in the first embodiment, the extension member 11 attached to the end of the rear guider 8 on the crossflow fan side moves forward and backward, so that the air inflow area of the crossflow fan 7 reduces the ventilation resistance in the air flow path 4. The scaling has been adjusted accordingly.

Further, at each predetermined position in the air flow path 4 on the upstream side and the downstream side of the cross flow fan 7, that is, each of the suction position and the blowing position of the cross flow fan 7, functions as a static pressure detecting means. Static pressure sensor 14
The static pressures detected by these static pressure sensors 14 before and after the cross flow fan 7, that is, the values of the static pressures having a correlation corresponding to the ventilation resistance in the air flow path 4 are controlled. It is taken in by the microcomputer 15 which is a means. The drive of the drive motor 13 is controlled by the microcomputer 15 based on the value of the received static pressure.
As a result, the extension member 11 is moved forward and backward.

Here, the static pressure sensors 14 are disposed in the air flow path 4 on the upstream and downstream sides of the cross flow fan 7, respectively. Since it is only necessary to detect the corresponding static pressure or the static pressure corresponding to the ventilation resistance between the heat exchanger 5 and the air filter 6, one of the static pressure sensors 14 is arranged at the suction position of the cross flow fan 7, and the other. May be arranged on the upstream side of the air filter 6 or outside the unit housing 1. Further, since the static pressure outside the unit housing 1 is almost the same as the atmospheric pressure, it is determined that there is no significant change. It goes without saying that the static pressure sensor 14 may be arranged only at the suction position of the flow fan 7.

Next, the operation control of the indoor unit provided in the air conditioner according to the first embodiment will be described. That is, when the operation of the cross flow fan 7 is started,
The room air is sucked from the air suction port 2 of the unit housing 1 by the cross flow fan 7 while passing through the air filter 6 and the heat exchanger 5, and is heat-exchanged while passing through the heat exchanger 5 to be air-conditioned. After being converted into air, the air is blown out from the air outlet 3 of the unit housing 1 into the room. When the ventilation resistance in the inside increases, the value of the static pressure detected by the static pressure sensor 14 arranged at least with respect to the suction position of the cross flow fan 7 also increases. The air volume of the room air flowing in the flow path 4 will decrease.

The inside of the air flow path 4 has a high static pressure, for example,
The high static pressure of about 1.6 mmAq or more as shown in FIG. 1 is recognized by the microcomputer 15, and the microcomputer 15 controls the driving of the drive motor 13 to move the extension member 11. As a result of the forward movement in the direction away from the air outlet 3 of the unit housing 1, the air inflow area of the cross flow fan 7 when the inside of the air flow path 4 has a high static pressure is reduced. Therefore, the air volume of the room air flowing in the air flow path 4 of the unit housing 1 increases, and a decrease in the blowing efficiency and an increase in noise are suppressed. On the other hand, if no dust adheres to the heat exchanger 5 and the air filter 6 and no dew condensation occurs on the heat exchanger 5 and the ventilation resistance in the air flow path 4 does not increase so much, the static pressure sensor 14
The microcomputer 15 controls the drive of the drive motor 13 and then moves the extension member 11 to the air outlet 3 of the unit housing 1 because the value of the static pressure detected by the
Will move backward in the direction to approach
Since the air volume adjustment at the time of the low static pressure which enlarges the air inflow area of the cross flow fan 7 is executed, the decrease in the air blowing efficiency and the increase in the noise are also suppressed.

In the first embodiment, the air inflow area of the cross flow fan 7 is reduced by the extension member 11 movably attached to the end of the rear guider 8 on the cross flow fan side. Is adopted, but the configuration is not limited to only such a configuration, and a configuration as described in each of the second and third embodiments may be employed. It is possible. Therefore, hereinafter, the case of an air conditioner employing another configuration will be described as the second and third embodiments.

(Embodiment 2) FIG. 3 is a cross-sectional view showing the internal structure of an indoor unit provided in an air conditioner according to Embodiment 2; the basic configuration of the indoor unit according to Embodiment 2 is shown. Is not different from the first embodiment,
2, parts and portions that are the same as those in FIG. 2 are given the same reference numerals, and detailed description thereof will be omitted. That is,
A rear guide 8 and a stabilizer 9 which are part of the air flow path 4 are provided between the air outlet 3 and the cross flow fan 7 of the unit housing 1 provided in the indoor unit according to the present embodiment. In addition, the inner ends of the rear guider 8 and the stabilizer 9, that is, the cross flow fan-side end, are disposed close to the cross flow fan 7. At this time, an extension member 1 configured to be able to move forward and backward is provided at the end of the stabilizer 9 on the cross flow fan side.
The extension members 17 are moved forward and backward by a drive motor 19 provided via a rack and pinion mechanism 18.

Therefore, when the extension member 17 is moved backward in the direction approaching the air outlet 3 of the unit housing 1 through the rack and pinion mechanism 18 by using the drive motor 19, the Flow fan 7
The air inflow area of the cross flow fan 7 is reduced when the extension member 17 is moved forward in the direction away from the air outlet 3. That is, the second embodiment
In this configuration, the extension member 17 attached to the end of the stabilizer 9 on the cross flow fan side moves forward and backward, so that the air inflow area of the cross flow fan 7 is adjusted in accordance with the ventilation resistance in the air flow path 4. That is, when the same operation control as that of the first embodiment is performed, the air flow is adjusted based on whether the inside of the air flow path 4 is at a high static pressure or a low static pressure. become.

(Embodiment 3) FIG. 4 is a cross-sectional view showing the internal structure of an indoor unit provided in an air conditioner according to Embodiment 3, and FIG. 5 is a cross-sectional view showing its modified structure. In the third embodiment, the air inflow area of the cross flow fan 8 is adjusted in accordance with the movement of the rear guider 8 or the stabilizer 9 itself or both of the rear guider 8 and the stabilizer 9. It has become. Since the basic configuration of the indoor unit according to the third embodiment is not different from that of the first embodiment, the same parts and portions in FIGS. 4 and 5 as those in FIG. The detailed description in is omitted.

A rear guide 8 and a stabilizer 9, which are part of the air flow path 4, are provided between the air outlet 3 of the unit housing 1 and the cross flow fan 7 provided in the indoor unit according to the third embodiment. In this case, as shown in FIG. 4, the rear guider 8 is driven by a drive motor 22 via a rack and pinion mechanism 21 while the rear guider 8 itself is pivoted about the axis of the cross flow fan 7. Is to be moved.
In such a configuration, when the rear guider 8 itself moves toward the air outlet 3 of the unit casing 1 via the rack and pinion mechanism 21 by the drive motor 22, the rear guider 8 itself is moved. Inner end,
That is, as a result of the cross flow fan side end part moving away from the cross flow fan 7, the air inflow area of the cross flow fan 7 is enlarged.

When the rear guider 8 itself is moved in a direction away from the air outlet 3 by the drive motor 22 via the rack and pinion mechanism 21, the inner end of the rear guider 8 cross-flows. In order to approach the fan 7, the air inflow area of the cross flow fan 7 is reduced. Therefore, in the third embodiment, the air inflow area of the cross flow fan 7 is reduced by the movement of the rear guider 8 itself.
The expansion and contraction is adjusted in accordance with the ventilation resistance in the inside, and when the inside of the air passage 4 becomes high static pressure, the air inflow area of the cross flow fan 7 is reduced, so that the inside of the air passage 4 is reduced. When the air flow in the air flow path 4 becomes low static while the air flow rate of the room air flowing through the air flow path increases, the air inflow area of the cross flow fan 7 is increased, so that the air flow through the air flow path 4 is increased. The amount of indoor air flowing is increased.

In the third embodiment, the rear guide 8
The stabilizer 9 itself is assumed to be moving, but as shown in a deformed structure in FIG. 5, the stabilizer 9 itself is oscillated and then moved, or, although not shown, the rear guider 8 and the stabilizer Needless to say, both of 9 may move. That is, in the indoor unit whose deformation structure is shown in FIG. 5, the rear guide 8 and the stabilizer 9 which are a part of the air flow path 4 are respectively connected to the air outlet 3 and the cross flow fan 7 of the unit housing 1. The stabilizer 9 at this time is to be oscillated after being supported by the drive motor 24 itself.

Therefore, when the stabilizer 9 itself is moved by the drive motor 24 in a direction away from the air outlet 3, the inner end of the stabilizer 9 approaches the cross flow fan 7, so that the cross flow fan 7 is reduced, and when it is moved in a direction approaching the air outlet 3, the inner end of the stabilizer 9 moves away from the cross flow fan 7 so that the cross flow fan 7, the air inflow area is enlarged. That is, the same operation control as that of the first embodiment is executed. If the inside of the air flow path 4 has a high static pressure, the air inflow area of the cross flow fan 7 is reduced to increase the amount of indoor air. If the static pressure is low, the air flow rate of the room air is increased by increasing the air inflow area of the cross flow fan 7.

Further, in the first to third embodiments, the air inflow area of the cross flow fan 7 is adjusted in accordance with the static pressure detected by the static pressure sensor 14 provided in the air flow path 4. Although it is described that the operation control is employed, it is needless to say that the present invention is not limited to such operation control.
Therefore, hereinafter, a case of an air conditioner employing another operation control will be described as a fourth embodiment.

(Embodiment 4) FIG. 6 is a cross-sectional view showing an internal structure of an indoor unit provided in an air conditioner according to Embodiment 4 and FIG. 7 is a cross-sectional view showing a modified structure thereof. Since the configuration itself of the indoor unit according to the fourth embodiment is not different from that of the first embodiment, FIG.
The same reference numerals are given to the same parts and portions as those described above, and the detailed description is omitted here. In the fourth embodiment, it is assumed that the configuration itself of the indoor unit is the same as that of the first embodiment. However, the present invention is not limited to only such a configuration. It goes without saying that a configuration corresponding to the second and third embodiments shown in FIG.

The indoor unit provided in the air conditioner according to the fourth embodiment has an air flow path 4 between the air outlet 3 of the unit housing 1 and the cross flow fan 7 as in the first embodiment. Rear guider 8 and stabilizer 9
Is provided. An extension member 11 configured to be able to move forward and backward is attached to an inner end of the rear guider 8 disposed close to the cross flow fan 7, that is, an end on the cross flow fan side. Is to be moved forward and backward by a drive motor 13 provided via a rack and pinion mechanism 12.

At this time, the static pressure in the air flow path 4 is set in the air flow path 4 downstream of the cross flow fan 7.
Further, a flow velocity sensor 26 is provided as a flow velocity detecting means for detecting an air flow velocity which has a correlation corresponding to the ventilation resistance, and the value of the air flow velocity detected by the flow velocity sensor 26 is controlled by the control means. Is taken in by the microcomputer 15. Therefore, the microcomputer 15 controls the driving of the drive motor 13 based on the value of the taken air flow velocity.
As a result, the air inflow area of the cross flow fan 7 is adjusted in accordance with the same procedure as in the first embodiment. Although the flow velocity sensor 26 is provided in the air flow path 4 downstream of the cross flow fan 7 here, the flow velocity sensor 26 is not limited to the downstream side of the cross flow fan 7 and the flow velocity sensor 26 Of course, it may be provided in the air flow path 4 on the upstream side.

Therefore, in the indoor unit provided in the air conditioner according to the fourth embodiment, the following operation control is performed. That is, when the operation of the cross flow fan 7 is started, the indoor air is supplied to the air inlet 2 of the unit housing 1.
The air is sucked by the cross flow fan 7 while passing through the air filter 6 and the heat exchanger 5 from the air passage 6. When the ventilation resistance of
Since the value of the air flow rate detected by the flow rate sensor 26 provided in the air flow path 4 decreases and becomes a high static pressure, the air volume of the room air flowing through the air flow path 4 decreases. come. The microcomputer 15 recognizes that the inside of the air flow path 4 has become high static pressure, and the microcomputer 15 controls the driving of the drive motor 13 so that the extension member 11 Outlet 3
The air inflow area of the crossflow fan 7 is reduced because the airbag is moved forward in a direction away from the airflow.
Therefore, the air volume of the room air flowing in the air flow path 4 of the unit housing 1 increases, and a decrease in the blowing efficiency and an increase in noise are suppressed.

On the other hand, when no dust adheres to the heat exchanger 5 and the air filter 6 and no dew condensation occurs on the heat exchanger 5 and the ventilation resistance in the air passage 4 does not increase so much, the flow rate sensor 26 Microcomputer 15 does not reduce the value of the air flow rate detected by
3 and drive the extension member 11 to the unit housing 1.
Is moved backward in a direction approaching the air outlet 3, and the air inflow area of the cross flow fan 7 is enlarged. Therefore, the unit housing 1
The air volume of the room air flowing through the air flow path 4 of this embodiment increases, so that a decrease in the blowing efficiency and an increase in noise are also suppressed.

In the fourth embodiment, the flow rate sensor 26 for detecting the air flow rate is provided in the air flow path 4 on the upstream side or the downstream side of the cross flow fan 7. However, the present invention is not limited to such a configuration. Therefore, as shown in FIG. 7, a rotation speed sensor 28 serving as rotation speed detecting means for detecting the rotation speed of the cross flow fan 7 is connected to the cross flow fan 7.
The rotation speed sensor 28 provided in place of the static pressure sensor 14 or the flow velocity sensor 26 detects that the inside of the air flow path 4 has become high static pressure, and detects the detected rotation. It is also possible to adopt a configuration in which the air inflow area of the cross flow fan 7 is adjusted in accordance with the number. Alternatively, although not shown, an operation time integrating means for integrating the operation time of the cross flow fan 7 is provided for the drive motor 13 so that dust adheres and dew condensation occurs and the inside of the air flow path 4 becomes high. It is also possible to adopt a configuration in which the microcomputer 15 estimates the operating time at which the static pressure will be attained, and then adjusts the air inflow area of the cross flow fan 7 according to the integrated operating time.

Further, Embodiments 1 to 5 described above
In the configuration 4, the extension members 11 and 17 attached to the rear guider 8 and the stabilizer 9 are moved forward and backward by the drive motors 13 and 19, or the rear guider 8 and the stabilizer 9 are moved by the drive motors 22 and 24. Although adopted, it is also possible to adopt a configuration different from these, and such a configuration will be described below as a fifth embodiment.

(Embodiment 5) FIG. 8 is a cross-sectional view showing the internal structure of an indoor unit provided in an air conditioner according to Embodiment 5, and FIG. 9 is a perspective view showing a main part thereof.
FIG. 4 is a cross-sectional view showing a deformation structure of the indoor unit. 8 to 10, the same components and portions as those in FIGS. 2 to 7 are denoted by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIGS. 8 and 9, between the air outlet 3 and the cross flow fan 7 of the unit housing 1 of the indoor unit according to the fifth embodiment, as shown in FIGS. Is provided, and a flat-plate-shaped extending member 30 capable of swinging operation is attached to an end of the rear guider 8 on the cross flow fan side. In the fifth embodiment, it is assumed that the extension member 30 is attached to the rear guider 8. However, the present invention is not limited to such a configuration. Needless to say, it may be attached to the part so as to be swingable.

At this time, the extension member 30 is fixed to a fixing portion of the cross flow fan 7 via a tension spring 31 so as to reduce the air inflow area of the cross flow fan 7. A support member 32 between the extension member 30 and the rear guider 8, that is, a support member 3 made of a shape memory alloy that deforms according to temperature conditions and supporting the extension member 30
2 are interposed. That is, here, the tension spring 31 and the support member 32 are to be driving means for causing the extension member 30 to swing.

Therefore, in the indoor unit according to the fifth embodiment, the following operation control is executed. First, when the cross-flow fan 7 is operated, the room air is sucked by the cross-flow fan 7 from the air inlet 2 of the unit housing 1 while passing through the air filter 6 and the heat exchanger 5. The ventilation resistance in the air flow path 4 increases with dew condensation in the exchanger 5 to increase the static pressure, whereas the dew does not occur during heating, so the air flow path 4 remains at a low static pressure. During cooling, the extension member 3 provided at the cross flow fan side end of the rear guider 8 is provided.
0 is previously fixed at a position where the air inflow area of the cross flow fan 7 is reduced.
Thus, the air flow control at the time of high static pressure, which needs to reduce the air inflow area, is performed without any inconvenience.

On the other hand, at the time of heating when the inside of the air flow path 4 has a low static pressure, the support member 32 made of the shape memory alloy is heated by the room air heated by the heat exchanger 5, and The member 32 causes the extension member 30 to swing in a direction away from the cross flow fan 7. When the air inflow area of the cross flow fan 7 is increased, the air volume of the room air flowing in the air flow path 4 increases, so that a decrease in the blowing efficiency and an increase in noise at low static pressure are suppressed. Is done. Therefore, in the fifth embodiment, if the inside of the air flow path 4 has a high static pressure, the air flow rate of the room air is increased by reducing the air inflow area of the cross flow fan 7 and the low static pressure Then, it means that the air volume of the indoor air is increased by increasing the air inflow area of the cross flow fan 7.

In the fifth embodiment, the driving means for oscillating the extension member 30 is composed of the extension spring 31 and the support member 32 made of a shape memory alloy. However, the present invention is limited to such a configuration. Instead, a support member 34 made of bimetal may be used as a driving means of the extension member 30 as in the deformed structure shown in FIG. 10. In such a configuration, it is necessary to use the tension spring 31. Disappears. Further, in the above description, the driving means including the tension spring 31 and the support member 32 made of the shape memory alloy, or the driving means including the support member 34 made of the bimetal is used. It is a matter of course that the extension member 30 itself may be manufactured by using a shape memory alloy or a bimetal that is deformed according to the temperature conditions without using the driving means. The same operation control as described above is performed.

[0048]

As described above, the air conditioner according to the present invention employs a configuration for expanding and contracting the air inflow area of the cross flow fan in accordance with the ventilation resistance in the air flow path. When the static pressure corresponding to the ventilation resistance in the air flow path and the corresponding static pressure is lower than a certain value, that is, when the adhesion of dust and condensation are small, that is, at a low static pressure, the air inflow area of the cross flow fan is enlarged to increase the air volume. On the other hand, when the static pressure in the air flow path becomes higher than a certain value due to the adhesion of dust or condensation, that is, when the static pressure is high, the air inflow area of the cross flow fan is reduced to increase the air volume. Becomes possible. In addition, since the cross flow fan can be operated with the pressure characteristics corresponding to the ventilation resistance in the air flow path, the effect of easily reducing a decrease in the blowing efficiency and an increase in noise can be obtained.

[Brief description of the drawings]

FIG. 1 is a correlation diagram illustrating a correlation between a static pressure and an air flow when an air inflow area of a cross flow fan changes.

FIG. 2 is a cross-sectional view showing the internal structure of the indoor unit provided in the air conditioner according to the first embodiment.

FIG. 3 is a cross-sectional view illustrating an internal structure of an indoor unit included in the air conditioner according to the second embodiment.

FIG. 4 is a cross-sectional view showing an internal structure of an indoor unit provided in the air conditioner according to the third embodiment.

FIG. 5 is a cross-sectional view showing the modified structure.

FIG. 6 is a cross-sectional view showing an internal structure of an indoor unit included in an air conditioner according to a fourth embodiment.

FIG. 7 is a cross-sectional view showing the modified structure.

FIG. 8 is a cross-sectional view showing an internal structure of an indoor unit provided in the air conditioner according to the fifth embodiment.

FIG. 9 is a perspective view showing a main part thereof.

FIG. 10 is a transverse sectional view showing a modified structure of the indoor unit.

FIG. 11 is a cross-sectional view showing an internal structure of an indoor unit provided in an air conditioner according to a conventional mode.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Unit housing 2 Air inlet 3 Air outlet 4 Air flow path 5 Heat exchanger 6 Air filter 7 Cross flow fan

Claims (12)

[Claims] 1. A unit housing in which an air flow path for connecting and connecting an air inlet and an air outlet is provided, a heat exchanger disposed in the air flow path, and a heat exchanger. An air filter arranged in the air flow path on the upstream side,
An air conditioner including an indoor unit including a cross flow fan disposed in the air flow path downstream of the heat exchanger, wherein an air inflow area of the cross flow fan is provided. The air conditioner is characterized in that the expansion and contraction is adjusted in accordance with the ventilation resistance in the air flow path. 2. The air conditioner according to claim 1, wherein a rear guider and a stabilizer, which are a part of an air flow path, are provided between the air outlet of the unit housing and the cross flow fan. As at least one of the rear guider and the stabilizer moves in the direction approaching the air outlet, the air inflow area of the cross flow fan is enlarged, and at least one of the rear guider and the stabilizer is An air conditioner characterized in that the air inflow area of the cross flow fan is reduced as it moves in a direction away from the air outlet. 3. The air conditioner according to claim 1, wherein a rear guider which is a part of an air flow path is provided between the air outlet of the unit housing and the cross flow fan. An extension member that can move forward and backward is attached to the end of the cross flow fan, and as the extension member moves backward in a direction approaching the air outlet, the air inflow area of the cross flow fan While the extension member moves forward in the direction away from the air outlet, so that the air inflow area of the cross flow fan is reduced. Air conditioner. 4. The air conditioner according to claim 1, wherein a rear guide serving as a part of an air flow path is provided between the air outlet of the unit housing and the cross flow fan. A swingable extending member is attached to the end of the crossflow fan, and the extension member swings in a direction approaching the crossflow fan. While the inflow area is reduced, the air inflow area of the crossflow fan is enlarged as the extension member swings in a direction away from the crossflow fan. A characteristic air conditioner. 5. The air conditioner according to claim 1, wherein the air flow path is provided between the air outlet of the unit housing and the cross flow fan. A stabilizer is provided at the cross flow fan side end of the stabilizer, and an extension member that can move forward and backward is attached to the stabilizer, and the extension member moves backward in a direction approaching the air outlet. While the air inflow area of the cross flow fan is enlarged along with, the air inflow area of the cross flow fan is reduced as the extension member moves forward in the direction away from the air outlet. An air conditioner characterized by having a configuration as follows. 6. The air conditioner according to claim 1, wherein an air flow path is provided between the air outlet of the unit housing and the cross flow fan. A stabilizer is provided at the end of the stabilizer on the cross flow fan side, and an extension member capable of swinging operation is attached to the stabilizer, and the extension member swings in a direction approaching the cross flow fan. The air inflow area of the cross flow fan is reduced while the extension member swings in a direction away from the cross flow fan. An air conditioner characterized in that it is configured to be enlarged. 7. The air conditioner according to claim 1, wherein a static pressure detecting means for detecting a static pressure corresponding to a ventilation resistance is provided in the air flow path. An air conditioner characterized in that the air inflow area of the cross flow fan is adjusted in accordance with the detected static pressure. 8. The air conditioner according to claim 1, wherein a flow rate detecting means for detecting an air flow rate is provided in an air flow path on an upstream side or a downstream side of the cross flow fan. An air conditioner, wherein an air inflow area of the cross flow fan is adjusted in accordance with a detected air flow velocity. 9. The air conditioner according to claim 1, further comprising a rotation speed detecting means for detecting a rotation speed of the cross flow fan, wherein the air flow of the cross flow fan is provided. An air conditioner characterized in that the inflow area is scaled and adjusted according to the detected rotation speed. 10. The air conditioner according to claim 1, further comprising an operation time integrating means for integrating the operation time of the cross flow fan, wherein the air of the cross flow fan is provided. An air conditioner characterized in that the inflow area is scaled according to the accumulated operation time. 11. The air conditioner according to claim 4, wherein the extension member is moved by a drive unit made of a shape memory alloy or a bimetal that is deformed in accordance with a temperature condition. Air conditioner. 12. The air conditioner according to claim 4, wherein the extension member is made of a shape memory alloy or a bimetal that deforms according to a temperature condition. Air conditioner.