JP3792226B2 - Air conditioner - Google Patents

Description

  The present invention relates to an air conditioner that harmonizes air taken into a housing and sends it out indoors.

  FIG. 47 is a side sectional view showing an indoor unit of a conventional air conditioner disclosed in Japanese Patent Application No. 2002-266437. The indoor unit 1 of an air conditioner is normally disposed at a position higher than the height of the user, and the main body is held by the cabinet 2. The cabinet 2 is provided with a claw portion (not shown) on the rear side surface and is supported by engaging the claw portion with a mounting plate (not shown) attached to the indoor side wall W1.

  A front panel 3 provided with suction ports 4 on the upper surface side and the front surface side is detachably attached to the cabinet 2. A substantially rectangular air outlet 5 extending in the width direction of the indoor unit 1 is formed in the gap between the lower end of the front panel 3 and the lower end of the cabinet 2.

  Inside the indoor unit 1, a blower path 6 that communicates from the suction port 4 to the blowout port 5 is formed. A blower fan 7 that sends out air is disposed in the blower path 6. An air filter 8 that collects and removes dust contained in the air sucked from the suction port 4 is provided at a position facing the front panel 3. An indoor heat exchanger 9 is disposed between the blower fan 7 and the air filter 8 in the blower path 6.

  The indoor heat exchanger 9 is connected to a compressor (not shown) arranged outdoors, and the refrigeration cycle is operated by driving the compressor. The indoor heat exchanger 9 is cooled to a temperature lower than the ambient temperature during cooling by operating the refrigeration cycle. During heating, the indoor heat exchanger 9 is heated to a temperature higher than the ambient temperature.

  A temperature sensor 61 is provided between the indoor heat exchanger 9 and the air filter 8 to detect the temperature of the air taken into the cabinet 2. The temperature sensor 61 detects the temperature of the air sucked from the suction port 4, and the operating frequency of the refrigeration cycle and the blower fan according to the difference from the target room temperature (hereinafter referred to as “set temperature”) set by the user. 7 is controlled.

  A drain pan 10 that collects condensation that has fallen from the indoor heat exchanger 9 during cooling or dehumidification is provided in the lower part before and after the indoor heat exchanger 9. The front drain pan 10 is attached to the front panel 3, and the rear drain pan 10 is formed integrally with the cabinet 2.

  In the vicinity of the air outlet 5 in the air blowing path 6, lateral louvers 11 a and 11 b that face the outside and can change the vertical air outlet angle in an arbitrary direction between a substantially horizontal direction and a rear lower side are provided. A vertical louver 12 capable of changing the blowing angle in the left-right direction is provided on the back side of the horizontal louvers 11a, 11b.

  In the air conditioner having the above configuration, when heating of the air conditioner is started, the blower fan 7 is rotationally driven, refrigerant from the outdoor unit (not shown) flows to the indoor heat exchanger 9, and the refrigeration cycle is operated. Thus, air is sucked into the indoor unit 1 from the suction port 4, and dust contained in the air is removed by the air filter 8.

  The air taken into the indoor unit 1 is heated by exchanging heat with the indoor heat exchanger 9. And the direction of the left-right direction and an up-down direction is controlled by the vertical louver 12 and the horizontal louvers 11a and 11b through the ventilation path 6, and conditioned air is sent out indoors toward the front lower direction from the blower outlet 5 as shown by the arrow A. Is done.

  When the difference between the room temperature and the set temperature is smaller than a predetermined temperature, the wind direction is directed substantially downward by the lateral louvers 11a and 11b as shown in FIG. As a result, the conditioned air is sent out from the air outlet 5 in the substantially downward direction as indicated by the arrow B1, reaches the floor surface in the living room, and spreads along the floor surface over the entire floor surface.

  Moreover, since warm air has a small specific gravity, a part of the airflow sent out from the blower outlet 5 is wound up and rises as shown by an arrow B3. As a result, there arises a problem that the heating capacity is reduced due to the short circuit and the upper part of the living room is heated and the lower part is not sufficiently heated.

  For this reason, Japanese Patent Application No. 2003-005378 shows an air conditioner that can send conditioned air backward from the blowout port 5 as shown in FIG. Thereby, as shown by the arrow C from the blower outlet 5, the air sent out back and downward is transmitted to the side wall W1 by the Coanda effect and reaches the floor surface. Therefore, it is possible to improve the heating efficiency and comfort by preventing an increase in warm air sent downward.

Patent Document 1 discloses an air conditioner that can change the direction of the wind direction plate and send conditioned air from the blowout port 5 in a substantially downward direction.
Japanese Patent No. 3311932

  FIG. 50 shows a static pressure distribution in the vicinity of the air outlet 5 when conditioned air is sent forward and downward from the air outlet 5 by the conventional air conditioner. According to the figure, the static pressure distribution is uniform in the vicinity of the blowout port 5. However, when the conditioned air is sent from the blower outlet 5 in the substantially downward direction, the conditioned air flowing through the air blowing path 6 is changed by the horizontal louvers 11a and 11b in the direction of about 45 ° in the downward direction. FIG. 51 shows the static pressure distribution in the vicinity of the outlet 5 at this time. As shown in the figure, a high static pressure portion 90 (indicated by hatching in FIG. 48) is generated in the blower path 6 where the static pressure is extremely higher than other portions.

  The conditioned air flowing through the air blowing path 6 passes through the high static pressure unit 90. In other words, the conditioned air flows through the isostatic lines of the static pressure of the high static pressure section 90 and the streamlines of the airflow intersecting each other. For this reason, a big pressure loss is caused and ventilation efficiency falls. That is, when the blower fan 7 has the same number of rotations, the air volume is reduced to about 70 to 80% of the maximum air volume (at the time of forward downward blowing). That is, the contour line of the high static pressure portion 90 intersects with the air flow, and a large pressure loss occurs when the air flow passes through the high static pressure portion 90. This is the cause of so-called bending loss.

  When the conditioned air is sent from the outlet 5 to the rear and lower side, the conditioned air flowing through the blower path 6 is changed by about 90 ° in the rear and lower direction by the lateral louvers 11a and 11b. FIG. 52 shows the static pressure distribution near the outlet 5 at this time. As shown in the figure, a high static pressure portion 90 (indicated by hatching in FIG. 49) having a higher static pressure than that shown in FIG. Thereby, when the blower fan 7 has the same rotation speed, the air volume is reduced to about 50 to 60% at the time of the maximum air volume (at the time of forward downward blowing).

  When the amount of air sent from the air outlet 6 is reduced, the reach of warm air is shortened and the airflow from the side wall W1 is peeled off, so that the winding due to buoyancy increases. For this reason, it becomes impossible to air-condition every corner of the living room and the temperature in the vicinity of the floor does not increase, which causes discomfort to the user and locally lowers the user's body temperature, thereby harming health. In order to prevent this, there is a problem that noise increases when the air volume is increased by increasing the number of rotations of the blower fan 7 and sending out conditioned air.

  It is also conceivable that the air flow path 6 is configured downward to reduce pressure loss when blowing directly downward or rearward and lowering noise. However, there is a new problem that not only the air volume decreases when blowing in the horizontal direction or forward, but also that the side louvers 11a and 11b are likely to form condensation during the cooling operation.

  Moreover, according to the air conditioner disclosed in Patent Document 1, since the wind direction is suddenly changed, the airflow is separated from the wind direction plate, and it is difficult to set the wind direction in a desired direction. Also in this case, similarly to the above, a high static pressure portion is generated in the vicinity of the wind direction plate, an isobaric line intersecting with the air flow is generated, and the pressure loss is increased, so that the air volume is reduced.

  An object of the present invention is to provide an air conditioner capable of reducing the noise while allowing the conditioned air to reach every corner of a living room in an air conditioner capable of switching the direction of the air sent from the air outlet. To do.

In order to achieve the above object, the present invention provides a suction port for taking in indoor air, a blowout port for sending conditioned air conditioned and taken from the suction port into the room, and a ventilation path for guiding conditioned air to the blowout port. When, and a wind direction varying section for varying the wind direction of the conditioned air delivered from the air outlet to the front lower and beneath direction or rearward downward, downward as in the air conditioner to be mounted on a wall of the room, go forward The upper wall and the lower wall are inclined to each other, and a plane passing through a position where the inclination direction of the upper wall changes horizontally or upward and a position where the inclination direction of the lower wall changes directly downward is terminated. , provided front guide portion for guiding the conditioned air forwardly downward to the blowing path, when sending beneath direction or backward downward conditioned air from the outlet, the wall surface of the air flow path the air direction changing unit And continuously arranged, end is formed continuously with the front guide portion a passage serving as the outlet from the end of the front guide portion, the width of the passageway in the direction substantially perpendicular to the airflow as seen from the side The front guide portion is maintained wider than the end of the front guide portion from the end of the front guide portion to the outlet, and is in contact with the wind direction variable portion in the forward direction of the airflow flowing through the front guide portion. to form a high static pressure which isobar static pressure distribution along the flow direction of the conditioned air facing the wind direction changing unit at a high pressure than the static pressure also narrow the flow path of the conditioned air by the high static pressure The channel area is narrower than the end of the front guide portion .

According to this configuration, the air conditioner is attached to the wall surface of the room. For example, when the cooling operation is performed, the conditioned air is sent forward and downward from the outlet. In addition, when the heating operation is performed, the air direction variable portion moves and the conditioned air is sent out from the blower outlet directly downward or rearwardly. After the conditioned air descends along the wall surface due to the Coanda effect, the air circulates on the floor surface. Circulate the room. At this time, the static pressure distribution formed in the vicinity of the wind direction variable portion is formed substantially in parallel along the air flow in which the isobaric lines circulate facing the wind direction variable portion. Thereby, an airflow distribute | circulates and does not cross | intersect an isobar, and is sent out from an outlet.
Further, the airflow flowing through the front guide portion is blocked by the high static pressure portion formed forward in the traveling direction and curved, and is guided directly downward or rearwardly downward. Further, the air flow is blocked by the high static pressure portion, and the width of the flow path through which the conditioned air can flow is narrower than the front guide portion.

The present invention is the air conditioner of the above configuration is characterized in that the flow path is narrowed by the high static pressure and expanded on the downstream side.

Further, the present invention is the air conditioner having the above-described configuration, wherein the airflow direction varying portion forms a flow path along the airflow flowing through the front guide portion when the conditioned air is sent out from the blowout port to the front lower side, When the conditioned air is sent out from the outlet in the downward direction or in the lower rear direction, the airflow flowing through the front guide portion is curved. According to this configuration, the conditioned air flowing through the front guide unit flows through the flow path along the front guide unit by the guidance of the wind direction variable unit and is sent out forward and downward. In addition, the conditioned air flowing through the front guide portion is bent by the guidance of the wind direction variable portion, and is sent directly downward or rearwardly downward.

  Further, in the air conditioner having the above-described configuration, when the conditioned air is sent out from the air outlet in a downward direction or in a rearward and downward direction, the front of the airflow flowing through the front guide portion is blocked by the wind direction variable portion. It is characterized by that. According to this configuration, the airflow flowing through the front guide portion is curved by being blocked by the air layer in the vicinity of the wind direction variable portion that is blocked in the front in the traveling direction, and is guided directly downward or rearwardly downward.

  The cross-sectional shape of the high static pressure portion may be a substantially arcuate bicusp curve. It is more desirable that the high static pressure portion has a maximum static pressure at the central portion of the arc forming a substantially arcuate shape.

  Further, the present invention is the air conditioner having the above-described configuration, characterized in that the wind direction varying portion is arranged to intersect with an extension line of a lower inner wall of the front guide portion. According to this configuration, the conditioned air is guided below the extension of the front guide portion by the wind direction variable portion.

  Further, the wind direction variable portion can be formed by a movable inner wall of the air blowing path. You may extend a ventilation path | route by a wind direction variable part. The wind direction variable portion may be formed by a plurality of wind direction plates that are arranged at the outlet and change the direction by rotation.

  According to the present invention, in the air conditioner having the above-described configuration, a static pressure detection unit that detects a static pressure distribution of the air flow path is provided, and the wind direction variable unit is varied based on a detection result of the static pressure detection unit. It is a feature. According to this configuration, the static pressure distribution is detected by the static pressure detection means, and the direction of the wind direction variable portion is varied so that the isobars near the wind direction variable portion are along the flow path.

Further, the present invention is the air conditioner of the above configuration, it is characterized by performing the room heating operation by sending the conditioned air.

According to the present invention, when the conditioned air is sent out from the air outlet directly downward or rearward and downward, the isobaric lines of the static pressure distribution near the wind direction variable portion are formed in the direction along the flow path. The flowing airflow does not intersect the isobar. For this reason, the pressure loss concerning airflow can be reduced and the air volume at the same rotation speed of the blower fan can be increased. Therefore, it is possible to reduce noise by reducing the number of rotations of the blower fan necessary to send out a desired air volume. In addition, since the high static pressure part is formed in contact with the wind direction variable part in the forward direction of the air flow flowing through the front guide part, the air flow is easily bent by the high static pressure part and the isostatic line of the high static pressure part flows. It can be formed along the path. In addition, since the flow path of the conditioned air is narrowed by the high static pressure portion so that the flow passage area is narrower than that of the front guide portion, the wind speed of the airflow adjacent to the high static pressure portion does not change significantly. For this reason, the static pressure fluctuation of the airflow is suppressed, the airflow flows more smoothly, and the pressure loss can be further reduced. Therefore, the air volume of the conditioned air sent from the air conditioner can be further increased.

Further , when the flow passage area that has been narrowed by the high static pressure portion and narrowed at one end is enlarged again on the downstream side, a so-called diffuser is formed by the enlarged flow passage, and further increases the air volume by assisting the increase in the static pressure of the blowing means. Can be increased .

Further, according to the present invention, the airflow direction varying portion forms a flow path along the airflow that flows through the front guide portion when the conditioned air is sent forward and downward from the blowout port, and the conditioned air is directly below or behind the blowout port. Since the airflow flowing through the front guide portion is curved when sent downward, it is possible to easily change the wind direction .

Also, according to the present invention, the front of the airflow flowing through the front guide portion is blocked by the airflow direction changing portion, so that the airflow is easily bent by the air layer in the vicinity of the airflow direction changing portion and the isobars near the airflow direction changing portion are flow paths. It can be formed along.

  Further, according to the present invention, since the cross-sectional shape of the high static pressure portion is a substantially arcuate bicusp curve, it is possible to easily form isobars that do not intersect the airflow. Moreover, since the high static pressure part has the maximum value of the static pressure in the central part of the arc forming a substantially arcuate shape, the isostatic lines on the upstream side and the downstream side of the high static pressure part are formed substantially symmetrically. For this reason, airflow can distribute | circulate more smoothly along an isobar, and pressure loss can be reduced more. Therefore, the air volume of the conditioned air sent from the air conditioner can be further increased.

  Further, according to the present invention, since the wind direction varying portion is arranged so as to intersect with the extension line of the lower inner wall of the front guide portion, the airflow can be reliably guided substantially downward or rearwardly downward.

  Further, according to the present invention, since the wind direction variable portion is formed by the movable inner wall of the air blowing path, the air direction can be easily changed and the air flow can be circulated along the isobar near the wind direction variable portion. In addition, since the air flow path is extended by the wind direction variable portion, it is possible to reduce the pressure loss when blowing forward and downward. Further, since the wind direction variable portion is composed of a rotating wind direction plate, the configuration can be further simplified.

  Further, according to the present invention, since the wind direction variable portion is varied based on the detection result of the static pressure detecting means, the air flow can be circulated more reliably along the isobar near the wind direction variable portion.

  Further, according to the present invention, since the indoor heating operation is performed by sending out conditioned air, it is possible to efficiently air-condition the room by sending a large amount of warm air directly downward or rearwardly.

  Embodiments of the present invention will be described below with reference to the drawings. For convenience of explanation, in each of the following embodiments, the same parts as those in the conventional example shown in FIGS.

<First Embodiment>
FIG. 1 is a side sectional view showing the air conditioner of the first embodiment (showing a D section in FIG. 6 to be described later). The indoor unit 1 of the air conditioner has a main body held by a cabinet 2, and a front panel 3 provided with suction ports 4 on the upper surface side and the front surface side is detachably attached to the cabinet 2.

  The cabinet 2 is provided with a claw portion (not shown) on the rear side surface, and is supported by engaging the claw portion with a mounting plate (not shown) attached to the side wall W1 of the living room. An air outlet 5 is provided in the gap between the lower end portion of the front panel 3 and the lower end portion of the cabinet 2. The air outlet 5 is formed in a substantially rectangular shape extending in the width direction of the indoor unit 1 and is provided facing the front lower side.

  Inside the indoor unit 1, a blower path 6 that communicates from the suction port 4 to the blowout port 5 is formed. A blower fan 7 that sends out air is disposed in the blower path 6. For example, a cross flow fan or the like can be used as the blower fan 7.

  The ventilation path 6 has a front guide portion 6 a that guides the air sent out by the blower fan 7 forward and downward. Wind direction variable portions 110a and 110b made of a flexible material are provided on the downstream side of the front guide portion 6a. A wall surface of the air flow path 6 between the front guide part 6a and the outlet 5 is formed by the air direction variable parts 110a and 110b. The air direction variable portions 110a and 110b are flexibly deformed and held at predetermined positions so that the blowing angle of the blowout port 5 can be changed from the front upper side to the rear lower side.

  Further, a static pressure detection sensor (not shown) for detecting the static pressure in the vicinity of the wind direction variable portion 110a on the front side is provided in the air blowing path 6. The wind direction variable portions 110a and 110b can be arranged so that the static pressure in the vicinity of the wind direction variable portion 110a becomes a predetermined value by the detection of the static pressure detection sensor.

  Note that the wind direction variable units 110a and 110b may be varied using a static pressure detection sensor so that the static pressure near the wind direction variable unit 110a becomes a predetermined value, and the positions of the wind direction variable units 110a and 110b may be stored as a database. . As a result, data corresponding to operating conditions can be taken from the database, and the wind direction variable portions 110a and 110b can be arranged at predetermined positions, and the static pressure detection sensor can be omitted.

  An air filter 8 that collects and removes dust contained in the air sucked from the suction port 4 is provided at a position facing the front panel 3. An indoor heat exchanger 9 is disposed between the blower fan 7 and the air filter 8 in the blower path 6. The indoor heat exchanger 9 is connected to a compressor (not shown) arranged outdoors, and the refrigeration cycle is operated by driving the compressor.

  The indoor heat exchanger 9 is cooled to a temperature lower than the ambient temperature during cooling by operating the refrigeration cycle. During heating, the indoor heat exchanger 9 is heated to a temperature higher than the ambient temperature. A temperature sensor 61 that detects the temperature of the sucked air is provided between the indoor heat exchanger 9 and the air filter 8, and a control unit that controls the driving of the air conditioner is provided on the side of the indoor unit 1. (Not shown) is provided. A drain pan 10 that collects condensation that has fallen from the indoor heat exchanger 9 during cooling or dehumidification is provided in the lower part before and after the indoor heat exchanger 9.

  In the air conditioner having the above configuration, when the operation of the air conditioner is started, the blower fan 7 is rotationally driven, the refrigerant from the outdoor unit (not shown) flows to the indoor heat exchanger 9, and the refrigeration cycle is operated. Thus, air is sucked into the indoor unit 1 from the suction port 4, and dust contained in the air is removed by the air filter 8.

  The air taken into the indoor unit 1 exchanges heat with the indoor heat exchanger 9, and is cooled or heated.

  The conditioned air cooled or heated by the indoor heat exchanger 9 is regulated in the left-right direction and the up-down direction by the vertical louver 12 and the wind direction variable portions 110a, 110b, and is directed indoors toward the front lower side as indicated by an arrow A. Sent out. Thereby, the indoor unit 1 will be in the state of the front downward blowing which sends out conditioned air to the front lower direction.

  At this time, the air direction variable portions 110a and 110b are arranged so as to extend substantially linearly on the upper wall and the lower wall of the air blowing path 6, respectively. Thereby, the wind direction variable part 110a, 110b forms the flow path along the airflow which distribute | circulates the front guide part 6a. Moreover, it forms so that a cross-sectional area may expand, so that the ventilation path 6 goes downstream by the wind direction variable part 110a, 110b. For this reason, the wind direction variable parts 110a and 110b act as a so-called diffuser, and the kinetic energy of the airflow that circulates facing the wind direction variable parts 110a and 110b is converted into a static pressure. Therefore, the air volume of the conditioned air sent from the blower outlet 5 is increased.

  Immediately after the start of the operation of the air conditioner, it is necessary to circulate indoor air promptly. For this reason, the air exchanged by the indoor heat exchanger 9 by increasing the rotational speed of the blower fan 7 is sent out from the outlet 5 vigorously. As a result, the conditioned air is sent from the outlet 5 forward and downward, for example, at a wind speed of about 6 to 7 m / sec, as indicated by the arrow A, and circulates in the living room.

  In the case of heating operation, the air direction is variable as shown in FIG. 2 after a certain period of time has elapsed after starting the heating operation or when the difference between the temperature of the air taken in from the suction port 4 and the set temperature is smaller than a predetermined temperature. The parts 110a and 110b are deformed. And as shown by the arrow C from the blower outlet 5, conditioned air is sent out to the back lower direction (wall direction), for example at a wind speed of about 5-6 m / sec.

  The wind direction variable portion 110a that constitutes the upper wall of the air blowing path 6 is formed in a concave shape on the side facing the air blowing path 6, and closes the front in the traveling direction of the airflow flowing through the front guide portion 6a. The air direction variable portion 110b that constitutes the lower wall of the air blowing path 6 is formed so that the side facing the air blowing path 6 is convex. Further, the downstream end portions of the wind direction variable portions 110a and 110b are arranged downward and rearward. As a result, the airflow flowing through the front guide portion 6a is curved by the wind direction variable portions 110a and 110b and guided backward and downward.

  FIG. 3 shows the static pressure distribution of the blower path 6. A high static pressure portion 90 is formed on the inner surface side of the wind direction variable portion 110a so as to be in contact with the wind direction variable portion 110a and higher than the static pressure of the front guide portion 6a. The position of the wind direction variable portions 110a and 110b is adjusted according to the detection result of a static pressure detection sensor (not shown) that detects the static pressure of the air flow path 6, and the isostatic line 90a of the high static pressure portion 90 faces the wind direction variable portion 110a. It is formed along the airflow. That is, the isobaric line 90a of the high static pressure part 90 is formed substantially parallel to the line connecting the end of the front guide part 6a and the end of the airflow direction changing part 110a, and the airflow is substantially parallel to the isobaric line 90a in the vicinity of the high static pressure part 90. It has become.

For this reason, the high static pressure part 90 acts as a hydrodynamic wall surface, and the direction of sending conditioned air can be smoothly changed by the wind direction variable parts 110a and 110b to suppress an increase in pressure loss. Therefore, the conditioned air can be sent rearward and downward without reducing the air volume. Even when the conditioned air is sent substantially downward, the isostatic line 90a of the high static pressure portion 90 is formed along the airflow according to the direction of the wind direction variable portions 110a and 110b in the same manner as described above, and the conditioned air is not reduced. Can be sent substantially downward.

FIG. 4 shows the relationship between the rotational speed of the blower fan 7 and the air volume of the indoor unit 1 of the air conditioner of this embodiment. The vertical axis represents the air volume (unit: m ³ / min), and the horizontal axis represents the rotational speed (unit: rpm) of the blower fan 7. Further, in the figure, K1 represents the time when the blowing wind direction is the rear lower side (wall direction blowing, see FIG. 2). For comparison, K2, K3, and K4 are respectively when the blowing air direction is a front lower direction (see FIG. 47 at the maximum air volume, see FIG. 48), a rear lower direction (see FIG. 48), and a rear lower direction (see FIG. 49). It represents.

  According to the figure, in the conventional air conditioners (K2, K3, K4), the air volume at the same rotation speed decreases as the wind direction change angle in the vicinity of the air outlet 5 increases. This is because of the pressure loss when the airflow passes through the high static pressure portion 90, and the higher the static pressure of the high static pressure portion 90 through which the airflow passes, the higher the pressure loss and the air volume decreases. .

  On the other hand, in the present embodiment (K1), although the blowing wind direction is the rear lower side (wall direction blowing), it is possible to obtain an air volume substantially equal to that at the front lower blowing (K2) when the wind direction is not changed. it can. Therefore, it is possible to greatly improve the air blowing efficiency when blowing backward and downward.

FIG. 5 shows the relationship between the air volume of the blower fan 7 and the noise of the indoor unit 1 of the air conditioner of this embodiment. The vertical axis represents noise (unit: dB), and the horizontal axis represents the air volume (unit: m ³ / min). Similarly to the above, in the figure, K1 represents the time when the blowing air direction is the rear lower side (wall direction blowing, see FIG. 2), and K2, K3, K4 are the front air blowing direction of the conventional air conditioner, respectively. It represents the time when the maximum air volume is obtained (see FIG. 47), the downward direction (see FIG. 48), and the lower rear (see FIG. 49).

  According to the figure, in the conventional air conditioners (K2, K3, K4), the noise at the same air volume increases as the wind direction change angle in the vicinity of the outlet 5 increases. This is due to a decrease in the air volume due to pressure loss when the airflow passes through the high static pressure section 90. The higher the static pressure of the high static pressure section 90 through which the airflow passes, the higher the pressure loss and the air volume. Decrease. As a result, it is necessary to increase the rotational speed of the blower fan 7 in order to ensure a desired air volume, and noise increases.

  On the other hand, the present embodiment (K1) realizes substantially the same noise as that of the forward downward blow (K2) when the wind direction is not changed even though the blown wind direction is the rear downward (wall direction blow). Can do. Therefore, it is possible to greatly improve the quietness when blowing backward and downward.

  FIG. 45 shows an indoor unit 1 of an air conditioner of a comparative example for comparison with the present embodiment. In the figure, instead of the hydrodynamic wall formed by the high static pressure section 90, a physical wall surface is formed by the wind direction variable section 110a. FIG. 46 shows the static pressure distribution in the vicinity of the wind direction variable portions 110a and 110b at this time. As shown in the figure, a high static pressure portion 90 having an isobaric line that intersects the streamline of the airflow is formed in the flow path. Accordingly, the pressure loss is increased, and the air volume is drastically reduced to the same extent as the rear lower blowing (K4) of the conventional air conditioner shown in FIGS.

  In FIG. 2, the high static pressure portion 90 is formed in a substantially arcuate bicuspid curve, and the high static pressure portion 90 has a maximum static pressure at the center of the arc forming a substantially arcuate shape. Thereby, the upstream side and the downstream side of the high static pressure portion 90 have a substantially symmetrical static pressure distribution. Therefore, the airflow can flow more smoothly along the isobar 90a, the pressure loss can be further reduced, and the amount of conditioned air sent from the air conditioner can be further increased.

  Further, the inner wall on the side facing the front guide portion 6a of the airflow direction changing portion 110a is formed so as to go downward as it goes downstream, and the lower wall of the front guide portion 6a is extended to the outside of the air outlet 5 further. It is arranged so as to intersect the virtual plane 98. Thereby, the lower end part of the wind direction variable part 110a is distribute | arranged below rather than the virtual surface 98, and an airflow is reliably guide | induced to right below substantially or back back. Therefore, airflow is not sent out in an unintended direction, and a highly reliable air conditioner can be obtained.

  FIG. 6 shows the behavior of the airflow in the living room R at the time of rearward and downward blowing. The conditioned air descends along the side wall W1 and returns to the suction port 4 along the floor surface F, the side wall W2 opposite to the side wall W1, and the ceiling wall S as indicated by an arrow C. As a result, it is possible to prevent the warmed air that has been sent out from being rolled up and prevent a reduction in heating efficiency due to the short circuit, and it is possible to sufficiently warm the lower part of the living room R and improve comfort.

  In the heating operation, when the temperature sensor 61 detects that the temperature difference between the temperature of the air taken in from the suction port 4 and the set temperature is small, the air flow is gradually reduced by adjusting the blower fan 7. Even if the air flow rate decreases, the conditioned air (warm air) sent downward from the indoor unit 1 continues to descend along the side wall W1 without being rolled up by the Coanda effect, and does not directly fall into the living space. Follow F and reach your feet. Therefore, comfort is improved without any discomfort due to direct wind on the user.

  Furthermore, since there is no discomfort due to direct wind hitting the user and noise reduction is ensured at the same time, even if the temperature difference between the temperature of the air taken in from the suction port 4 and the set temperature becomes small, the air volume can be reduced. There is no need to reduce it. Therefore, the conditioned air having a large air volume can always be continuously supplied into the living room R.

  It should be noted that the shape of the wind direction variable portions 110a and 110b can be set by a user operating a remote controller (not shown). Thereby, the wind direction of conditioned air can be arbitrarily selected by the user.

  According to the present embodiment, when the conditioned air is sent out from the air outlet directly downward or rearward and downward, the airflow flowing toward the wind direction variable portions 110a and 110b is curved with respect to the airflow flowing through the front guide portion 6a. . And since the constant pressure line 90a of the high static pressure part 90 which contact | connects the wind direction variable parts 110a and 110b does not cross the mainstream streamline of the airflow which curves and distribute | circulates the ventilation path 6, the pressure loss concerning this airflow is reduced significantly. be able to. As a result, a large amount of conditioned air can be sent out despite a large change in wind direction. In addition, in the high static pressure part 90, since the low-speed and low-energy air flow separated from the main stream flows along the wind direction variable part 110a, the influence on the pressure loss is reduced.

  In addition, the main flow of conditioned air that circulates facing the wind direction variable portions 110 a and 110 b circulates in a space surrounded by the high static pressure portion 90 and the lower wall surface of the air blowing path 6. That is, the wall surface of the flow path is formed by the high static pressure portion 90. Therefore, since the airflow is not in contact with the wind direction variable portion 110a, loss due to viscosity is reduced, and the air volume can be further increased.

  Moreover, the high static pressure part 90 which has the isobaric line 90a along an airflow can be easily formed by obstruct | occluding the advancing direction front of the airflow which distribute | circulates the front guide part 6a by the wind direction variable part 110a.

  Moreover, the high static pressure part 90 comprises the wall surface of a flow path, the flow path of conditioned air is restrict | squeezed by the high static pressure part 90, a nozzle shape is formed, and a flow path area becomes narrower than the front guide part 6a. For this reason, a high-energy fluid is delivered from the outlet 5 by the action of the nozzle. As a result, the wind speed of the airflow adjacent to the high static pressure portion 90 does not change significantly, and the static pressure fluctuation of the airflow is suppressed, so that the airflow flows more smoothly and pressure loss can be further reduced. Therefore, the air volume of the conditioned air sent from the air conditioner can be further increased.

  Further, the flow passage area narrowed by the high static pressure portion 90 and narrowed at one end is expanded again on the downstream side of the wind direction variable portions 110a and 110b. Thereby, as the flow path goes downstream, the cross-sectional area temporarily decreases to form a minimum cross-sectional area portion (hereinafter referred to as “throat portion”). For this reason, what is called a diffuser is comprised by the expanded flow path, and it can assist the static pressure rise of the ventilation fan 7, and can increase an air volume further. Further, as shown in FIG. 3, since the high static pressure portion 90 does not occur in the throat portion of the flow path and no pressure loss occurs, the curved portion where the pressure loss does not occur by bending the flow path at that position. Can be formed.

  Moreover, since the flexible wind direction variable part 110a, 110b which can be deform | transformed flexibly is provided in the blower outlet 5, the wall surface of the ventilation path 6 can be changed easily. For this reason, the static pressure distribution in the ventilation path can be easily changed.

  In the case of the cooling operation, when a certain time has elapsed since the start of the cooling operation or when the difference between the temperature of the air taken in from the suction port 4 and the set temperature is smaller than a predetermined temperature, FIG. As shown, wind direction variable portions 110a and 110b are arranged. Thereby, as shown by the arrow D from the blower outlet 5, conditioned air is sent out at a wind speed of about 5 to 6 m / sec in the horizontal direction, for example.

  That is, the wind direction varying part 110a extending the upper wall of the front guide part 6a is arranged in the horizontal direction. The wind direction variable portion 110b extending the lower wall of the front guide portion 6a is arranged with its downstream end directed in the horizontal direction so that the inside of the air passage 6 is concave. When the conditioned air flows along the wind direction variable portions 110a and 110b, a substantially arcuate high static pressure portion 90 having a bicuspid curve is formed in the concave portion of the wind direction variable portion 110b.

  Therefore, in the same manner as described above, when the rotational speed of the blower fan 7 is the same, the conditioned air having a larger air volume than the conventional air can be sent out from the outlet 5 in the horizontal direction. Can send conditioned air in a horizontal direction from the blow-out port 5 with low noise compared to the prior art.

  As another aspect of the present embodiment, the air conditioner may be configured as a so-called corner air conditioner. That is, as shown in FIG. 8, the indoor unit 1b may be attached at a position where it touches the ceiling wall S of the corner L where two adjacent side walls W3 and W4 of the living room R intersect. In this case as well, the conditioned air descends along the corner L and the side walls W3 and W4 by blowing out the conditioned air from the outlet toward the corner L downward and downward. It returns to the inlet 4 through the side walls W5, W6 and the ceiling wall S facing W3, W4 in order. Thereby, warm air circulates through the room R and heating operation is performed. Therefore, the above effect can be obtained.

Second Embodiment
Next, FIG. 9 is a side sectional view showing the indoor unit 1 of the air conditioner according to the second embodiment. The same parts as those in the first embodiment shown in FIGS. 1 to 8 are given the same reference numerals. In this embodiment, instead of the wind direction variable portions 110a and 110b made of the flexible material of the first embodiment, wind direction variable portions 111a and 111b that extend the air flow path 6 by rotation are provided. Other parts are the same as those in the first embodiment.

  The wind direction variable portion 111b is rotatably supported by a rotation shaft 111d, and the wind direction variable portion 111a is rotatably supported by a rotation shaft 111e via an arm portion 111c connected to the rotation shaft 111d. The rotating shaft 111d is rotated by driving of a driving motor 111f through a gear (not shown). Further, a position restricting portion 111g for restricting the position of the air direction varying portion 111a is provided at the tip of the air direction varying portion 111a.

  As shown in the figure, when the operation of the air conditioner is started, the air direction variable portions 111a and 111b are housed below the cabinet 2, and the conditioned air is sent out from the outlet 5 to the front lower side as indicated by the arrow A. Further, in the case of heating operation, when a certain time has elapsed since the start of operation, or when the difference between the temperature of the air taken in from the suction port 4 and the set temperature is smaller than a predetermined temperature, as shown in FIG. The wind direction variable parts 111a and 111b are developed. Thereby, as shown by the arrow C, the conditioned air is sent downward and downward. For example, it is sent toward the side wall W1 at a wind speed of about 5 to 6 m / sec, and circulates along the side wall W1 by the Coanda effect.

  FIGS. 11A to 11F show the operation of the wind direction variable portions 111a and 111b. FIG. 11A shows a state where the wind direction variable portions 111a and 111b are expanded (see FIG. 10). That is, the wind direction variable portion 111a contacts the upper wall of the front guide portion 6a and extends the upper wall of the air flow path 6 in the same manner as in the first embodiment, and closes the front of the air flow direction of the front guide portion 6a. Be placed. The wind direction variable part 111b is arrange | positioned in the position which extends the lower wall of the ventilation path 6 similarly to 1st Embodiment.

  FIG. 11B shows a state in which the drive motor 111f has started driving. When the rotating shaft 111d rotates in the J direction by driving the drive motor 111f, the wind direction variable portions 111a and 111b and the arm 111c rotate in the J direction around the rotating shaft 111d. As shown in FIGS. 11C and 11D, when the rotation shaft 111d is further rotated by driving of the drive motor 111f, the wind direction varying portion plate 111b comes into contact with the lower surface of the cabinet 2.

  When the rotation shaft 11d further rotates, the wind direction variable portion 111a rotates, and the position restricting portion 111g contacts the lower surface of the cabinet 2 as shown in FIG. As the arm portion 111c continues to rotate, the position restricting portion 111f slides with the cabinet 2, and the wind direction varying portion 111b rotates in the K direction. Then, as shown in FIG. 11 (f), the wind direction variable portion 111 a comes into contact with the wind direction variable portion 111 b and the wind direction variable portions 111 a and 111 b are in the stored state (see FIG. 9). Note that when the wind direction variable portions 111a and 111b are deployed, they operate in the reverse order.

  In FIG. 10, the air direction variable portion 111 a is concave on the air blowing path 6 side, and the downstream end is directed rearward and downward. The air direction variable portion 111b is arranged by extending the lower wall of the air blowing path 6 as in the first embodiment. Further, the air direction variable portion 111b is convex on the air passage 6 side, and is disposed at a position where the lower wall portion of the air outlet 5 is extended and smoothly extended, and the downstream end portion is directed rearward and downward. Then, as in the first embodiment, a substantially arch-shaped high static pressure portion 90 formed of a bicuspid curve that contacts the wind direction varying portion 111a when the conditioned air flows while facing the wind direction varying portions 111a and 111b is formed. To do.

  Thereby, the isostatic line 90a (refer FIG. 3) of the high static pressure part 90 is formed along the airflow which faced the wind direction variable parts 111a and 111b. For this reason, the high static pressure part 90 becomes a hydrodynamic wall surface, and conditioned air is smoothly sent out from the outlet 5 to the lower rear without causing a pressure loss by smoothly changing the delivery direction. The air direction variable portions 111a and 111b may be arranged such that the tips of the air direction variable portions 111a and 111b face substantially downward, and the conditioned air may be sent out from the air outlet 5 substantially downward.

  Further, the flow path is narrowed by the high static pressure portion 90, and the flow path is expanded again on the downstream side. Further, the air direction varying portion 111a is arranged so as to intersect with a virtual surface 98 obtained by extending the lower wall of the front guide portion 6a outward from the air outlet 5. Therefore, the same effect as the first embodiment can be obtained. Note that the settings of the vertical louver 12 and the wind direction variable portions 111a and 111b can be changed by the operation of the remote controller by the user.

<Third Embodiment>
Next, FIG. 12 is a side sectional view showing the indoor unit 1 of the air conditioner according to the third embodiment. Portions similar to those of the second embodiment shown in FIGS. 9 to 11 are given the same reference numerals. In this embodiment, instead of the wind direction variable portions 111a and 111b of the second embodiment, wind direction variable portions 112a and 112b that are rotatably supported are provided. Other parts are the same as those of the second embodiment.

  The wind direction variable portion 112b extends from the lower wall of the front guide portion 6a and is pivotally supported by the cabinet 2 by a rotating shaft 112f that rotates by driving of a drive motor (not shown). An upper arm 112c is rotatably connected to the rotation shaft 112f, and a lower arm 112d is rotatably connected to the upper arm 112c via an arm joint 112e. The wind direction variable portion 112a is arranged at the outlet 5 and is rotatably supported by the lower arm 112d by a rotating shaft 112g that is rotated by a drive motor (not shown), and the direction of the wind is changed by driving the drive motor. It consists of wind direction plates.

  When the heating operation is started, the wind direction variable portions 112a and 112b having a curved cross-sectional shape are arranged along the front guide portion 6a with the upper arm 112c and the lower arm 112d extended as shown in FIG. The wind direction variable portion 112a is disposed so that the front end is directed downward and the lower surface side is concave, and the wind direction variable portion 112b is disposed such that the front end is directed downward and the air blowing path 6 side is convex. Then, the conditioned air is sent forward and downward as indicated by an arrow A.

  Moreover, since the airflow direction variable part 112b has the air supply path 6 side convex, the cross-sectional area is enlarged so that the flow path of conditioned air goes downstream. As a result, when the airflow flows through this portion, the kinetic energy is converted into a static pressure and acts as a so-called diffuser. For this reason, the air volume of the blower fan 7 is increased.

  When a certain time has elapsed after starting the heating operation, or when the difference between the temperature of the air taken in from the suction port 4 and the set temperature is smaller than a predetermined temperature, as shown in FIG. 112b is arranged. That is, the wind direction variable portion 112a is disposed at a position where one end of the air direction variable portion 112a is brought into contact with the upper wall of the air passage 6 by the drive motor and the upper wall of the air passage 6 is extended. The other end portion of the wind direction variable portion 112a is arranged facing backward and downward. Moreover, the wind direction variable part 112b is arrange | positioned toward the back downward direction so that the ventilation path 6 side may become convex.

  As a result, the forward direction of the airflow flowing through the front guide portion 6a is blocked by the wind direction varying portion 112a, and a substantially arcuate high static pressure portion 90 formed of a bicusp curve in contact with the wind direction varying portion 112a is formed. In the high static pressure portion 90, the isobaric line 90a (see FIG. 3) is formed along the flow direction of the conditioned air facing the wind direction variable portions 112a and 112b, as in the first and second embodiments. For this reason, the high static pressure part 90 becomes a hydrodynamic wall surface, and the conditioned air is sent out from the outlet 5 downward and rearward with the delivery direction smoothly changed.

  At this time, since the contact portion between the upper wall of the front guide portion 6a and the air direction varying portion 112a does not become a smooth curved surface, the vortex 25 is generated in the high static pressure portion 90, and the air blowing efficiency is higher than in the first and second embodiments. Slightly decreases. However, it is possible to obtain an air blowing efficiency substantially equal to that of the first and second embodiments while suppressing an increase in pressure loss as compared with the prior art. The conditioned air may be sent out from the air outlet 5 in the substantially downward direction with the tips of the air direction variable portions 112a and 112b directed in the substantially downward direction.

  Further, the flow path is narrowed by the high static pressure portion 90, and the flow path is expanded again on the downstream side. Furthermore, the wind direction variable part 112a is arrange | positioned so that the virtual wall 98 which extended the lower wall of the front guide part 6a outside from the blower outlet 5 may be crossed. Therefore, the same effects as those of the first and second embodiments can be obtained.

  When the cooling operation is started by the air conditioner having the above-described configuration, the air direction variable portions 112a and 112b are arranged as shown in FIG. In other words, the wind direction varying portion 112a is arranged so that the lower surface side is convex along the front guide portion 6a with the upper arm 112c and the lower arm 112d extended along the front guide portion 6a.

  The air direction variable portion 112 b is retracted from the air flow sent out from the air outlet 5 and is stored below the cabinet 2. Then, the conditioned air is sent forward and downward as indicated by an arrow A. As a result, the conditioned air is sent upward from the front lower blowing during the heating operation, and the conditioned air having a low temperature is lowered by its own weight and diffused into the room. In addition, by storing the air direction variable portion 112b below the cabinet 2, it is possible to prevent dew on the air direction variable portion 112b during cooling.

  When a certain time has elapsed since the start of the cooling operation or when the difference between the temperature of the air taken in from the suction port 4 and the set temperature is smaller than a predetermined temperature, as shown in FIG. 112b is arranged. That is, the wind direction variable portion 112a is convex on the lower surface side with the upper arm 112c and the lower arm 112d extended, and the upstream end is substantially parallel to the airflow flowing through the air blowing path 6 and bisects the airflow, It arrange | positions so that an edge part may face a horizontal direction front.

  Further, the air direction varying portion 112 b is retracted from the air flow sent out from the air outlet 5 and is stored below the cabinet 2. And as shown by the arrow D from the blower outlet 5, the conditioned air is sent out at a wind speed of about 5 to 6 m / sec in the horizontal direction, for example.

  FIG. 16 shows a state when the operation of the air conditioner is stopped. When the operation of the air conditioner is stopped, the upper arm 112c and the lower arm 112d are in a folded state, the wind direction variable portion 112b is arranged in the blower path 6, and the air outlet 5 is blocked by the wind direction variable portion 112a. Thereby, the inside of the indoor unit 1 cannot be visually recognized. In addition, the position of the vertical louver 12 and the wind direction variable parts 112a and 112b can be changed by the operation of the remote controller by the user.

<Fourth embodiment>
Next, FIG. 17 is a side sectional view showing the indoor unit 1 of the air conditioner of the fourth embodiment. The same parts as those in the third embodiment shown in FIGS. 12 to 16 are denoted by the same reference numerals. In this embodiment, instead of the wind direction variable portions 112a and 112b of the third embodiment, wind direction variable portions 113a, 113b, and 113c that are rotatably supported are provided. Moreover, the upper wall of the ventilation path 6 is inclined upward near the outlet 5. Other parts are the same as those of the third embodiment.

  The air direction variable portion 113c extends from the lower wall of the front guide portion 6a and is pivotally supported on the cabinet 2 by a rotating shaft 113f that rotates by driving of a drive motor (not shown). The air direction variable portions 113a and 113b are disposed at the outlet 5 and are rotatably supported by rotating shafts 113d and 113e that are rotated by a drive motor (not shown), and the direction of the air is changed by driving the drive motor to change the air direction. It consists of wind direction plates.

  The wind direction variable portions 113b and 113c are curved in cross section, and one surface is formed as a convex curved surface and the other surface is formed as a concave curved surface. One surface (lower surface in the figure) of the air direction variable portion 113a is substantially flat, and the other surface (upper surface in the figure) is formed into a gently convex curved surface. ing.

  In the air conditioner having the above configuration, when the heating operation is started, the air direction variable portions 113a, 113b, 113c are arranged as shown in FIG. In other words, the wind direction variable portion 113a faces the rear lower side by the drive of the rotating shaft 113d and is arranged on the plane side, and faces the upper front side and the curved surface side is arranged. The wind direction variable portion 113b is arranged so that the upstream side end portion is substantially parallel to the airflow flowing through the blower path 6 and the airflow is divided into two by driving the rotating shaft 113e. Moreover, the front upper side of the wind direction variable part 113b is convexly arranged, and the downstream end is directed downward in the front.

  The air direction variable portion 113c is arranged so that the air passage 6 side is convex with the tip directed downward. Then, the conditioned air is sent forward and downward as indicated by an arrow A. Thereby, the indoor unit 1 will be in the state of the front downward blowing which sends out conditioned air to the front lower direction.

  Moreover, since the airflow direction variable part 113c has the air supply path 6 side convex, the cross-sectional area is enlarged so that the flow path of conditioned air goes downstream. As a result, when the airflow flows through this portion, the kinetic energy is converted into a static pressure and acts as a so-called diffuser. For this reason, the air volume of the blower fan 7 is increased.

  Moreover, as shown in FIG. 18, the blower outlet 5 can also be restrict | squeezed by the wind direction variable parts 113a and 113c. In other words, the wind direction variable portion 113a faces the front upper side and is disposed on the plane side, and faces the rear lower side and the curved surface side is disposed. The air direction variable portion 113c is arranged upward from FIG. 17, and the flow area of the conditioned air formed between the air direction variable portion 113a and the air direction variable portion 113a is reduced. The wind direction variable portion 113b is disposed along the airflow flowing between the wind direction variable portions 113a and 113c.

  As a result, when the airflow flows between the wind direction variable portions 113a and 113c, the static pressure is converted into kinetic energy. Therefore, the air volume of the blower fan is reduced, the blown air speed is increased, and the reach distance of the airflow can be extended.

  When a certain time has elapsed after starting the heating operation or when the difference between the temperature of the air taken in from the suction port 4 and the set temperature is smaller than a predetermined temperature, as shown in FIG. 113b and 113c are arranged. In other words, the air direction variable portion 113a is disposed at a position where one end of the airflow direction changing portion 113a is brought into contact with the upper wall of the air passage 6 and the upper wall of the air passage 6 is extended by driving the driving motor.

  The other end portion of the wind direction varying portion 113a is arranged downward so as to contact the rotating shaft 113e. The wind direction variable portion 113b is arranged with the tip facing downward and rearward so that the air flow path 6 side is concave. The air direction variable portion 113c is arranged with the tip directed downward and rearward so that the air flow path 6 side is convex.

  As a result, the forward direction of the airflow flowing through the front guide portion 6a is blocked by the airflow direction variable portions 113a and 113b, and the substantially arcuate high static pressure portion 90 formed of a bicusp curve in contact with the airflow direction variable portions 113a and 113b. It is formed. The isobaric line 90a (see FIG. 3) of the high static pressure part 90 is formed along the flow direction of the conditioned air facing the wind direction variable parts 113a, 113b, 113c, as in the first to third embodiments. For this reason, the high static pressure part 90 becomes a hydrodynamic wall surface, and the conditioned air is sent out from the outlet 5 downward and rearward with the delivery direction smoothly changed.

  At this time, since the contact portion between the upper wall of the front guide portion 6a and the air direction variable portion 113a is not formed by a smooth curved surface, a vortex 25 is generated in the high static pressure portion 90 and air is blown more than in the first and second embodiments. Efficiency is slightly reduced. However, it is possible to obtain an air blowing efficiency substantially equal to that of the first and second embodiments while suppressing an increase in pressure loss as compared with the prior art.

  Further, the flow path is narrowed by the high static pressure portion 90, and the flow path is expanded again on the downstream side. Further, the air direction variable portion 113b is disposed so as to intersect with a virtual plane 98 that extends the lower wall of the front guide portion 6a further to the outside of the air outlet 5. Therefore, the same effects as those of the first to third embodiments can be obtained.

  In addition, as shown in FIG. 20, you may arrange | position the plane side of the wind direction variable part 113a facing the ventilation path 6. As shown in FIG. Thereby, the wind direction variable part 113a, 113b is distribute | arranged along the front panel 3, and the beauty | look of the indoor unit 1 improves. At this time, since the high static pressure part 90 is formed by being surrounded by the upper wall of the air flow path 6 inclined forward and upward and the wind direction variable parts 113a and 113b, the vortex 25 developed in the high static pressure part 90 becomes large. For this reason, compared with the case of FIG. 19, although ventilation efficiency falls a little, the increase in a pressure loss can be suppressed rather than before.

  In addition, as shown in FIG. 21, the conditioned air may be sent from the air outlet 5 in the substantially downward direction with the tips of the air direction variable portions 113b and 113c facing in the substantially downward direction. At this time, if the wind direction variable portion 113a is arranged along the front panel 3 as shown in FIG. 22, the aesthetic appearance of the indoor unit 1 is improved.

  In the air conditioner having the above-described configuration, when the cooling operation is started, the air direction variable portions 113a, 113b, 113c are arranged as shown in FIG. In other words, the air direction variable portion 113a is arranged such that the plane side faces the front upper side along the airflow flowing through the front guide portion 6a. The air direction varying portion 113b is arranged in parallel with the airflow flowing through the front guide portion 6a and is convex downward by dividing the airflow into two. The air direction varying portion 113 c is disposed below the cabinet 2 by retracting from the airflow sent from the blowout port 5.

  Then, the conditioned air is sent forward and downward as indicated by an arrow A. As a result, the conditioned air is sent upward from the front lower blowing during the heating operation, and the conditioned air having a low temperature is lowered by its own weight and diffused into the room.

  If the airflow direction changing portion 113a faces the rear lower side and is disposed on the plane side as shown in FIG. 17, the airflow does not flow upward and condensation occurs in the airflow direction changing portion 113a. For this reason, the wind direction variable part 113a is arrange | positioned below 113 A of rotating shafts by making the plane side of the wind direction variable part 113a into an upper surface. Thereby, low-temperature conditioned air flows along both surfaces of the wind direction variable portion 113a, and condensation of the wind direction variable portion 113a can be prevented.

  When a certain time has elapsed since the start of the cooling operation or when the difference between the temperature of the air taken in from the suction port 4 and the set temperature is smaller than the predetermined temperature, as shown in FIG. 113b and 113c are arranged. That is, the airflow direction changing portion 113a is arranged with the plane side facing the rear upper side along the airflow flowing through the front guide portion 6a. The air direction varying portion 113b is arranged in parallel with the airflow flowing through the front guide portion 6a and is convex downward by dividing the airflow into two. The air direction varying portion 113 c is disposed below the cabinet 2 by retracting from the airflow sent from the blowout port 5.

  As a result, the conditioned air is sent out from the blow-out port 5 upward and forward, for example, at a wind speed of about 5 to 6 m / sec. The conditioned air sent into the room reaches the ceiling of the living room R as shown in FIG. Thereafter, the air is sucked into the suction port 4 from both sides of the indoor unit 1 through the wall surface W2 facing the indoor unit 1 from the ceiling surface S, the floor surface F, and the wall surface W1 on the indoor unit 1 side by the Coanda effect.

  Therefore, the user is not always exposed to cold wind or warm wind, and the user's discomfort can be prevented and the comfort can be improved. Furthermore, health safety can be improved without locally lowering the user's body temperature during cooling. At this time, since the air flow greatly stirs the entire room R, the temperature distribution in the room R becomes uniform near the set temperature. That is, except for a part above the living room R, the entire living area of the user substantially matches the set temperature, a temperature variation is small, and a comfortable space in which direct wind hardly hits the user can be obtained. Further, by storing the air direction variable portion 113c below the cabinet 2, it is possible to prevent dew on the air direction variable portion 113c during cooling.

  Furthermore, as shown in FIG. 26, when the direction of the air direction varying portion 113a is made horizontal, conditioned air can be sent out from the blowout port 5 in the horizontal direction as indicated by an arrow D. In addition, by arranging the air direction variable portion 113b so as to protrude downward at the time of forward downward blowing shown in FIG. 23, the wind direction can be smoothly changed at the time of forward upward blowing (see FIG. 24) and horizontal blowing (see FIG. 26). The part 113b can be arranged.

  FIG. 27 shows a state when the operation of the air conditioner is stopped. When the operation of the air conditioner is stopped, the air direction variable portion 113c is disposed in the air blowing path 6, and the air outlet 5 is closed by the air direction variable portions 113a and 113b. Thereby, the inside of the indoor unit 1 cannot be visually recognized. Moreover, if the wind direction varying portion 113a is arranged along the front panel 3 and the wind direction varying portion 113b is arranged so as to connect the lower end of the wind direction varying portion 113a and the bottom surface of the cabinet 2, the aesthetic appearance of the indoor unit 1 can be improved. it can. In addition, the position of the vertical louver 12 and the wind direction variable portions 113a, 113b, and 113c can be changed by the operation of the remote controller by the user.

<Fifth Embodiment>
Next, FIG. 28 is a side sectional view showing the indoor unit 1 of the air conditioner of the fifth embodiment. Portions similar to those in the fourth embodiment shown in FIGS. 17 to 27 are given the same reference numerals. In the present embodiment, wind direction variable portions 114a and 114b are provided in place of the wind direction variable portions 113a, 113b, and 113c of the fourth embodiment. Other parts are the same as in the fourth embodiment.

  The air direction variable portions 114a and 114b are disposed at the outlet 5 and are formed of flat plates having both surfaces. The rotating shafts 114c and 114d rotatably support the air direction variable portions 114a and 114b, and are rotated by a drive motor (not shown). As a result, the wind direction variable portions 114a and 114b are made of wind direction plates that change the direction of the wind direction by driving the drive motor. Further, the rotation shaft 114c is provided at the approximate center of the wind direction variable portion 114a, and the rotation shaft 114d is provided at the end of the wind direction variable portion 114b.

  In the air conditioner having the above-described configuration, when the heating operation is started, the air direction variable portions 114a and 114b are arranged as shown in FIG. That is, the wind direction variable portions 114a and 114b are arranged along the airflow flowing through the front guide portion 6a. At this time, the wind direction varying portion 114b is arranged so that the end portion on the rotating shaft 114d side is rearward. Then, the conditioned air is sent forward and downward as indicated by an arrow A. Thereby, the indoor unit 1 will be in the state of the front downward blowing which sends out conditioned air to the front lower direction.

  When a certain time has elapsed after starting the heating operation or when the difference between the temperature of the air taken in from the suction port 4 and the set temperature is smaller than a predetermined temperature, as shown in FIG. 114b is arranged. That is, the wind direction variable portion 114a is arranged so that one end thereof is close to the upper wall of the air blowing path 6 and extends the upper wall downward by driving the drive motor. The other end portion of the wind direction varying portion 114a is disposed close to the rotating shaft 114d and directed downward. The tip of the wind direction varying portion 114b is arranged with the rearward downward direction.

  As a result, the forward direction of the airflow flowing through the front guide portion 6a is closed by the airflow direction variable portions 114a and 114b, and the high static pressure portion 90 in contact with the airflow direction variable portions 114a and 114b is formed. The isobaric line 90a (see FIG. 3) of the high static pressure part 90 is formed along the flow direction of the conditioned air facing the wind direction variable parts 114a and 114b as in the first to fourth embodiments. For this reason, the high static pressure part 90 becomes a hydrodynamic wall surface, and the conditioned air is sent out from the outlet 5 downward and rearward with the delivery direction smoothly changed.

  Further, the flow path is narrowed by the high static pressure portion 90, and the flow path is expanded again on the downstream side. Furthermore, the wind direction variable part 114b is arrange | positioned so that the virtual wall 98 which extended the lower wall of the front guide part 6a to the outer side from the blower outlet 5 may be crossed. Therefore, the same effects as those in the first to fourth embodiments can be obtained. Although the high static pressure portion 90 does not form a substantially bow shape as in the first to fourth embodiments, the blowing efficiency is slightly deteriorated, but the pressure loss can be reduced and the blowing efficiency can be improved as compared with the conventional one.

  In addition, as shown in FIG. 30, when the wind direction varying portion 114 a is arranged along the front panel 3, the aesthetic appearance of the indoor unit 1 is improved. At this time, since the contact portion between the upper wall of the front guide portion 6a and the air direction variable portion 114a is not formed by a smooth curved surface, the vortex 25 is generated in the high static pressure portion 90 and the air is blown more than in the first and second embodiments. Efficiency is slightly reduced. However, it is possible to obtain an air blowing efficiency substantially equal to that of the first and second embodiments while suppressing an increase in pressure loss as compared with the prior art.

  In addition, as shown in FIG. 31, the conditioned air may be sent out from the air outlet 5 in the substantially downward direction with the tip of the air direction varying portion 114b directed in the substantially downward direction. At this time, as shown in FIG. 32, if the wind direction varying portion 114a is arranged along the front panel 3, the aesthetic appearance of the indoor unit 1 is improved.

  Moreover, as shown in FIG. 33, the wind direction variable portion 114b may be arranged so that the end on the shaft side is forward, and the front blowing may be performed. However, in FIG. 28 described above, the shaft side end of the airflow direction changing portion 114b is disposed rearward when the front lower air is blown out, so that when the rear air is blown out rearward (see FIGS. 29 and 30) or when the air is sent in a substantially downward direction ( 31 and 32), it is more preferable because the wind direction variable portion 114b can be moved smoothly.

  Further, when the cooling operation is started in the air conditioner having the above-described configuration, the air direction variable portions 114a and 114b are arranged as shown in FIG. In other words, the wind direction variable portions 114a and 114b are disposed to be inclined forward and downward along the airflow flowing through the front guide portion 6a. At this time, the wind direction variable portion 114a is arranged with the front end above the front lower blowing in the heating operation shown in FIGS. Accordingly, it is possible to prevent condensation on the surface of the airflow direction changing portion 114a due to the low-temperature conditioned air as the airflow passes through both surfaces of the airflow direction changing portion 114a.

  Further, the wind direction varying portion 114b is arranged so that the end on the rotating shaft 114d side is forward. Then, the conditioned air is sent forward and downward as indicated by an arrow A. Thereby, the indoor unit 1 will be in the state of the front downward blowing which sends out conditioned air to the front lower direction.

  When a certain time has elapsed after starting the cooling operation, or when the difference between the temperature of the air taken in from the suction port 4 and the set temperature is smaller than a predetermined temperature, as shown in FIG. 114b is arranged. In other words, the wind direction varying portion 114a is disposed above the rear end at the front end, and is substantially parallel to the upper wall of the air blowing path 6 inclined upward in the vicinity of the blowout port 5. The wind direction variable portion 114b is arranged such that the end on the shaft side is lower forward than the end on the open side.

  As a result, the conditioned air is sent out from the blow-out port 5 upward and forward, for example, at a wind speed of about 5 to 6 m / sec. The conditioned air sent into the room reaches the ceiling of the living room R as in FIG. Thereafter, the air is sucked into the suction port 4 from both sides of the indoor unit 1 through the wall surface W2 facing the indoor unit 1 from the ceiling surface S, the floor surface F, and the wall surface W1 on the indoor unit 1 side by the Coanda effect. Therefore, comfort and safety can be improved as in the fourth embodiment.

  Furthermore, as shown in FIG. 36, when the direction of the wind direction varying portion 114a is made horizontal, conditioned air can be sent out from the outlet 5 in the horizontal direction as shown by an arrow D. Incidentally, by arranging the shaft side of the wind direction variable portion 114b forward at the time of the forward and downward blowing shown in FIG. 34, the wind direction can be smoothly made at the time of forward and upward blowing (see FIG. 35) and at the time of horizontal blowing (see FIG. 36). The variable part 114b can be arranged.

  FIG. 37 shows a state when the operation of the air conditioner is stopped. When the operation of the air conditioner is stopped, the air outlets are closed by the air direction variable portions 114a and 114b. Thereby, the inside of the indoor unit 1 cannot be visually recognized. Moreover, if the wind direction varying portion 114a is disposed along the front panel 3 and the wind direction varying portion 114b is disposed so as to connect the lower end of the wind direction varying portion 114a and the bottom surface of the cabinet 2, the aesthetic appearance of the indoor unit 1 can be improved. it can. Note that the position of the vertical louver 12 and the wind direction variable portions 114a and 114b can be changed by the operation of the remote controller by the user.

<Sixth Embodiment>
Next, FIG. 38 is a side sectional view showing the indoor unit 1 of the air conditioner according to the sixth embodiment. The same parts as those in the fifth embodiment shown in FIGS. 28 to 37 are given the same reference numerals. In the present embodiment, instead of the wind direction variable portions 114a and 114b of the fifth embodiment, wind direction variable portions 115a and 115b are provided. Other parts are the same as those of the fifth embodiment.

  The air direction variable portions 115a and 115b are arranged at the outlet 5 and are formed of flat plates having both surfaces. The rotation shafts 115c and 115d rotatably support the air direction variable portions 115a and 115b, and are rotated by a drive motor (not shown). Thus, the wind direction variable portions 115a and 115b are formed of wind direction plates that change the direction of the wind direction by driving the drive motor. Further, the rotation shaft 115c is provided at the approximate center of the wind direction variable portion 115a, and the rotation shaft 115d is provided at a position separated from the wind direction variable portion 115b at the approximate center of the wind direction variable portion 115b by a predetermined amount.

  In the air conditioner having the above-described configuration, when the heating operation is started, the air direction variable portions 115a and 115b are arranged as shown in FIG. That is, the wind direction variable portions 115a and 115b are arranged along the airflow flowing through the front guide portion 6a. At this time, the rotating shaft 115d of the wind direction varying portion 115b is disposed above the wind direction varying portion 115b. Then, the conditioned air is sent forward and downward as indicated by an arrow A. Thereby, the indoor unit 1 will be in the state of the front downward blowing which sends out conditioned air to the front lower direction.

  Further, as shown in FIG. 39, the rotating shaft 115d of the wind direction varying portion 115b may be disposed below the wind direction varying portion 115b to perform forward and downward blowing. As shown in FIG. 38, when the rotating shaft 115d is arranged above the wind direction variable portion 115b, the conditioned air can reach far. For this reason, it is suitable when the living room is relatively large.

  Further, as shown in FIG. 39, when the rotating shaft 115d is arranged below the airflow direction changing portion 115b, it is finer in the nearby space during heating than when the rotating shaft 115d is arranged above the airflow direction changing portion 115b. Airflow control can be performed. For this reason, it is suitable when the living room is relatively small. Accordingly, it is possible to make a selection in a timely manner based on the size of the living room.

  When a certain time has elapsed after starting the heating operation, or when the difference between the temperature of the air taken in from the suction port 4 and the set temperature is smaller than a predetermined temperature, as shown in FIG. 115b is arranged. That is, the wind direction variable portion 115a is arranged so that one end thereof is in contact with the upper wall of the air blowing path 6 by the drive motor and extends the upper wall of the front guide portion 6a. One end of the wind direction varying portion 115b is arranged close to the wind direction varying portion 115a, and the other end is arranged substantially downward. Note that the gap between the wind direction variable portions 115a and 115b is extremely small, and the amount of conditioned air leaking from the gap is extremely small.

  As a result, the forward direction of the airflow flowing through the front guide portion 6a is blocked by the wind direction variable portions 115a and 115b, and the high static pressure portion 90 in contact with the wind direction variable portions 115a and 115b is formed. The isobaric line 90a (see FIG. 3) of the high static pressure part 90 is formed along the flow direction of the conditioned air facing the wind direction variable parts 115a and 115b as in the first to fifth embodiments. For this reason, the high static pressure part 90 becomes a hydrodynamic wall surface, and the conditioned air is sent out from the outlet 5 downward and rearward with the delivery direction smoothly changed.

  Further, the flow path is narrowed by the high static pressure portion 90, and the flow path is expanded again on the downstream side. Furthermore, the wind direction variable part 115b is arrange | positioned so that the virtual wall 98 which extended the lower wall of the front guide part 6a outside from the blower outlet 5 may be crossed. Therefore, the same effects as those of the first to fifth embodiments can be obtained. Although the high static pressure portion 90 does not form a substantially bow shape as in the first to fourth embodiments, the blowing efficiency is slightly deteriorated, but the pressure loss can be reduced and the blowing efficiency can be improved as compared with the conventional one.

  Further, the wind direction variable portion 115b is not provided with the rotation shaft 115d at the end portion, and is provided at a predetermined distance from the center, so that it can be rotated with less torque than in the fifth embodiment. Therefore, it is possible to reduce the cost by reducing the power consumption of the drive motor and reducing the specifications of the drive motor output.

  In addition, as shown in FIG. 41, you may send conditioned air to a substantially downward direction as shown by the arrow B from the blower outlet 5, with the front-end | tip of the wind direction variable part 115b facing a little forward from the downward direction. 39, the rotating shaft 115d of the wind direction varying portion 115b is disposed below when blowing forward and downward, so that the wind direction is used when blowing backward and downward (see FIG. 40) or when sending out substantially downward (see FIG. 41). The variable portion 115b can be moved smoothly.

  Further, when the cooling operation is started in the air conditioner having the above-described configuration, the air direction variable portions 115a and 115b are arranged as shown in FIG. At this time, the wind direction variable portion 115a is set so that the outer end portion is slightly higher than that during heating. Thereby, conditioned air can be circulated on both surfaces of the wind direction variable portion 115a to prevent the wind direction variable portion 115a from dewing. Then, the conditioned air is sent forward and downward as indicated by an arrow A. Thereby, the indoor unit 1 will be in the state of the front downward blowing which sends out conditioned air to the front lower direction.

  When a certain period of time has elapsed since the start of the cooling operation or when the difference between the temperature of the air taken in from the suction port 4 and the set temperature is smaller than a predetermined temperature, as shown in FIG. 115b is arranged. In other words, the wind direction varying portion 115a is arranged so that the front end is located above the rear end, and is substantially parallel to the upper wall of the air blowing path 6 inclined upward in the vicinity of the outlet 5. The wind direction variable portion 115b is arranged so that the outer end portion is lower forward than the inner end portion.

  As a result, the conditioned air is sent out from the blow-out port 5 upward and forward, for example, at a wind speed of about 5 to 6 m / sec. The conditioned air sent into the room reaches the ceiling of the living room R as in FIG. Thereafter, the air is sucked into the suction port 4 from both sides of the indoor unit 1 through the wall surface W2 facing the indoor unit 1 from the ceiling surface S, the floor surface F, and the wall surface W1 on the indoor unit 1 side by the Coanda effect. Therefore, comfort and safety can be improved as in the fourth and fifth embodiments.

  Furthermore, as shown in FIG. 43, when the direction of the wind direction variable portion 115a is made horizontal, conditioned air can be sent out from the blowout port 5 in the horizontal direction as shown by an arrow D. 38, the rotating shaft 115d of the air direction varying portion 115b is disposed above the air direction varying portion 115b at the time of the forward lower air blowing shown in FIG. 38, so that the front upper air blowing (see FIG. 42) and the horizontal air blowing (see FIG. 43) can be arranged smoothly.

  FIG. 44 shows a state when the operation of the air conditioner is stopped. When the operation of the air conditioner is stopped, the air outlets are closed by the air direction variable portions 115a and 115b. Thereby, the inside of the indoor unit 1 cannot be visually recognized. Further, if the wind direction varying portion 115a is disposed along the front panel 3 and the wind direction varying portion 115b is disposed so as to connect the lower end of the wind direction varying portion 115a and the bottom surface of the cabinet 2, the aesthetic appearance of the indoor unit 1 can be improved. it can. Note that the position of the vertical louver 12 and the wind direction variable portions 115a and 115b can be changed by the operation of the remote controller by the user.

  Although the air conditioner according to the present invention has been described above, the present invention is not limited to the above embodiments, and can be implemented with appropriate modifications without departing from the spirit of the present invention.

These are side surface sectional drawings which show the state of the front lower blowing of the indoor unit of the air conditioner of 1st Embodiment of this invention. These are side surface sectional drawings which show the state of the back downward blowing of the indoor unit of the air conditioner of 1st Embodiment of this invention. These are figures which show the static pressure distribution of the blower outlet vicinity at the time of the back downward blowing state of the indoor unit of the air conditioner of 1st Embodiment of this invention. These are figures which show the relationship between the rotation speed of the ventilation fan of the indoor unit of the air conditioner of 1st Embodiment of this invention, and an air volume. These are figures which show the relationship between the air volume and noise of the ventilation fan of the indoor unit of the air conditioner of 1st Embodiment of this invention. These are the perspective views which show the behavior of the airflow in a living room in the state of the back downward blowing of the indoor unit of the air conditioner of 1st Embodiment of this invention. These are side surface sectional drawings which show the state of the horizontal blowing of the indoor unit of the air conditioner of 1st Embodiment of this invention. These are the perspective views which show the behavior of the airflow in a room when the state of the back downward blowing of the indoor unit of the air conditioner of the other aspect which concerns on 1st Embodiment of this invention. These are side surface sectional drawings which show the state of the front lower blowing of the indoor unit of the air conditioner of 2nd Embodiment of this invention. These are side surface sectional drawings which show the state of the back downward blowing of the indoor unit of the air conditioner of 2nd Embodiment of this invention. These are side surface sectional drawings explaining operation | movement of the wind direction variable part of the indoor unit of the air conditioner of 2nd Embodiment of this invention. These are side surface sectional drawings which show the state of the front downward blowing at the time of the heating operation of the indoor unit of the air conditioner of 3rd Embodiment of this invention. These are side surface sectional drawings which show the state of the back downward blowing at the time of the heating operation of the indoor unit of the air conditioner of 3rd Embodiment of this invention. These are side surface sectional drawings which show the state of the front downward blowing at the time of air_conditionaing | cooling operation of the indoor unit of the air conditioner of 3rd Embodiment of this invention. These are side surface sectional drawings which show the state of the horizontal direction blowing at the time of air_conditionaing | cooling operation of the indoor unit of the air conditioner of 3rd Embodiment of this invention. These are side surface sectional drawings which show the state at the time of the stop of the indoor unit of the air conditioner of 3rd Embodiment of this invention. These are side surface sectional drawings which show the state of the front downward blowing at the time of the heating operation of the indoor unit of the air conditioner of 4th Embodiment of this invention. These are side surface sectional drawings which show the state of the other front downward blowing at the time of the heating operation of the indoor unit of the air conditioner of 4th Embodiment of this invention. These are side surface sectional drawings which show the state of the back downward blowing at the time of the heating operation of the indoor unit of the air conditioner of 4th Embodiment of this invention. These are side surface sectional drawings which show the state of another back downward blowing at the time of the heating operation of the indoor unit of the air conditioner of 4th Embodiment of this invention. These are side surface sectional drawings which show the state of the right direction blowing at the time of the heating operation of the indoor unit of the air conditioner of 4th Embodiment of this invention. These are side surface sectional drawings which show the state of the other downward direction blowing at the time of the heating operation of the indoor unit of the air conditioner of 4th Embodiment of this invention. These are side surface sectional drawings which show the state of the front downward blowing at the time of the cooling operation of the indoor unit of the air conditioner of 4th Embodiment of this invention. These are side surface sectional drawings which show the state of the front upper blowing at the time of the cooling operation of the indoor unit of the air conditioner of 4th Embodiment of this invention. These are the perspective views which show the behavior of the airflow in a living room in the state of the front upper blowing of the indoor unit of the air conditioner of 4th Embodiment of this invention. These are side surface sectional drawings which show the state of the horizontal direction blowing at the time of the cooling operation of the indoor unit of the air conditioner of 4th Embodiment of this invention. These are side surface sectional drawings which show the state at the time of the stop of the indoor unit of the air conditioner of 4th Embodiment of this invention. These are side surface sectional drawings which show the state of the front downward blowing at the time of the heating operation of the indoor unit of the air conditioner of 5th Embodiment of this invention. These are side surface sectional drawings which show the state of the back downward blowing at the time of the heating operation of the indoor unit of the air conditioner of 5th Embodiment of this invention. These are side surface sectional drawings which show the state of the other back downward blowing at the time of the heating operation of the indoor unit of the air conditioner of 5th Embodiment of this invention. These are side surface sectional drawings which show the state of the direct downward blowing at the time of the heating operation of the indoor unit of the air conditioner of 5th Embodiment of this invention. These are side surface sectional views which show the state of the other downward direction blowing at the time of the heating operation of the indoor unit of the air conditioner of 5th Embodiment of this invention. These are side surface sectional drawings which show the state of the other front downward blowing at the time of the heating operation of the indoor unit of the air conditioner of 5th Embodiment of this invention. These are side surface sectional drawings which show the state of the front downward blowing at the time of the cooling operation of the indoor unit of the air conditioner of 5th Embodiment of this invention. These are side surface sectional drawings which show the state of the front upper blowing at the time of the cooling operation of the indoor unit of the air conditioner of 5th Embodiment of this invention. These are side surface sectional drawings which show the state of the horizontal direction blowing at the time of the cooling operation of the indoor unit of the air conditioner of 5th Embodiment of this invention. These are side surface sectional drawings which show the state at the time of the stop of the indoor unit of the air conditioner of 5th Embodiment of this invention. These are side surface sectional drawings which show the state of the front downward blowing at the time of the heating operation of the indoor unit of the air conditioner of 6th Embodiment of this invention. These are side surface sectional drawings which show the state of the other front downward blowing at the time of the heating operation of the indoor unit of the air conditioner of 6th Embodiment of this invention. These are side surface sectional drawings which show the state of the back downward blowing at the time of the heating operation of the indoor unit of the air conditioner of 6th Embodiment of this invention. These are side surface sectional drawings which show the state of the direct downward blowing at the time of the heating operation of the indoor unit of the air conditioner of 6th Embodiment of this invention. These are side surface sectional drawings which show the state of the front upper blowing at the time of the cooling operation of the indoor unit of the air conditioner of 6th Embodiment of this invention. These are side surface sectional drawings which show the state of the horizontal direction blowing at the time of air_conditionaing | cooling operation of the indoor unit of the air conditioner of 6th Embodiment of this invention. These are side surface sectional drawings which show the state at the time of the stop of the indoor unit of the air conditioner of 6th Embodiment of this invention. These are side surface sectional drawings which show the indoor unit of the air conditioner of the comparative example compared with the air conditioner of 1st Embodiment. These are figures which show the static pressure distribution of the blower outlet vicinity of the indoor unit of the air conditioner of the comparative example compared with the air conditioner of 1st Embodiment. These are side surface sectional drawings which show the state of the front lower blowing of the indoor unit of the conventional air conditioner. These are side surface sectional views which show the state of the downward blowing of the indoor unit of the conventional air conditioner. These are side surface sectional drawings which show the state of the back downward blowing of the indoor unit of the conventional air conditioner. These are figures which show the static pressure distribution of the blower outlet vicinity at the time of the state of the front lower blowing of the indoor unit of the conventional air conditioner. These are figures which show the static pressure distribution of the blower outlet vicinity at the time of the state of the blowing of the downward direction of the indoor unit of the conventional air conditioner. These are figures which show the static pressure distribution of the blower outlet vicinity at the time of the back downward blowing state of the indoor unit of the conventional air conditioner.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Indoor unit 2 Cabinet 3 Front panel 4 Inlet 5 Outlet 6 Blower path 7 Blower fan 8 Air filter 9 Indoor heat exchanger 10 Drain pan 12 Vertical louver 25 Vortex 61 Temperature sensor 90 High static pressure part 98 Virtual surface 110a, 110b, 111a, 111b, 112a, 112b, 113a, 113b, 113c, 114a, 114b, 115a, 115b Wind direction variable portion

Claims (12)

A suction port for taking in indoor air, a blow-out port for sending conditioned air conditioned and taken in from the suction port to the room, a ventilation path for guiding conditioned air to the blow-out port, and a conditioned air sent from the blow-out port In an air conditioner that includes a wind direction variable portion that changes the wind direction of the front to the lower side and directly below or to the rear lower side, and is attached to an indoor wall surface,
A position having an upper wall and a lower wall inclined downward as it goes forward, a position where the direction of inclination of the upper wall changes horizontally or upward, and a position where the direction of inclination of the lower wall changes downward A front guide part that guides conditioned air toward the front lower side is provided in the air blowing path .
When the conditioned air is sent from the air outlet directly downward or rearward and downward, the wind direction variable portion is continuously disposed on the wall surface of the air flow path, and a passage whose terminal end is the air outlet is disposed on the front guide portion. Formed continuously from the end to the front guide,
While maintaining the width of the passage in the direction substantially orthogonal to the airflow when viewed from the side from the end of the front guide part to the outlet, it is wider than the end of the front guide part,
In the direction of the flow of conditioned air that is in contact with the wind direction variable portion in front of the air flow direction flowing through the front guide portion and is higher than the static pressure of the front guide portion, the isostatic line of the static pressure distribution faces the wind direction variable portion. An air conditioner characterized in that a high static pressure section is formed, and a flow path of conditioned air is narrowed by the high static pressure section so that a flow area is narrower than a terminal end of the front guide section .   The air conditioner according to claim 1, wherein the flow path constricted by the high static pressure part is enlarged on the downstream side.   The wind direction variable portion forms a flow path along the airflow flowing through the front guide portion when the conditioned air is sent out from the blowout port to the front and lower side, and the conditioned air from the blowout port is directed downward or rearwardly downward. The air conditioner according to claim 1 or 2, wherein an air flow flowing through the front guide portion is curved when the air is sent out.   4. The air according to claim 3, wherein when the conditioned air is sent from the air outlet directly downward or rearward and downward, the front of the airflow flowing through the front guide portion is blocked by the airflow direction changing portion. Harmony machine.   The air conditioner according to any one of claims 1 to 4, wherein a cross-sectional shape of the high static pressure portion is a substantially arcuate bicusp curve.   The air conditioner according to claim 5, wherein the high static pressure portion has a maximum value of static pressure in a central portion of an arc forming a substantially arcuate shape.   The air conditioner according to any one of claims 1 to 6, wherein the wind direction varying portion is arranged to intersect with an extension line of a lower inner wall of the front guide portion. The air conditioner according to any one of claims 1 to 7, wherein the wind direction changing unit is characterized in that it consists of an inner wall of the movable of the air flow path.   9. The air conditioner according to claim 8, wherein the air flow path is extended by the wind direction variable portion when the conditioned air is sent out from the blowout port directly downward or rearward and downward. The wind direction changing unit is an air conditioner according to any one of claims 1 to 7, characterized in that it consists of a plurality of louver for changing the direction by rotation is disposed in the air outlet.   The static pressure detection means for detecting the static pressure distribution of the air flow path is provided, and the wind direction variable portion is varied based on the detection result of the static pressure detection means. Air conditioner as described in.   The air conditioner according to any one of claims 1 to 11, wherein an indoor heating operation is performed by sending out conditioned air.

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