JP6357258B2 - Air conditioning method and air conditioner - Google Patents

Description

  The present invention relates to an air conditioning method and an air conditioner that perform air conditioning using a wall of a living room.

  FIG. 10 is a perspective view of the room R in which the indoor unit 1 constituting a general wall-hanging type air conditioner is attached to the side wall of the room and is in a cooling state. As an example of a conventional air conditioning method during cooling, the inside of the room R is cooled by sending conditioned air from the indoor unit 1 attached to the side wall of the room R horizontally or downward as indicated by the arrows in FIG. .

JP-A-10-185290 (FIG. 1) JP-A-6-347060 (FIG. 1)

  FIG. 11 is a diagram showing the temperature distribution in the room in a stable state when the room R shown in FIG. 10 is cooled at a set temperature (28 ° C.). The living room R is located on the top floor of an apartment house such as an apartment, and the size of the living room R is 6 tatami mats (height 2400 mm, width 3600 mm, depth 2400 mm). The measurement points are a total of 48 points of 6 points and 8 points in the height direction and the horizontal direction at 600 mm intervals in the central cross section of the room R indicated by the alternate long and short dash line D in FIG. Further, the airflow in the cooling stable state has a slight air volume, and the blowing air direction is substantially horizontal.

According to the figure, there is a region where the room temperature is 3 ° C. to 4 ° C. higher than the installation temperature of 28 ° C. in the upper layer near the ceiling wall of the living room R, and about 5% higher than the set temperature of 28 ° C. in the center of the living room R. There is a region where the temperature is low. Therefore, an isotherm appears in the upper part of the living room R in a substantially horizontal direction, and a temperature variation of 8 ° C. to 9 ° C. occurs. That is, there is a problem that the temperature variation in the vertical direction in the living room R increases. In particular, the temperature distribution as described above tends to be extremely strong in the top floor room of the house. Moreover, since the roof was heated by the sun and the ceiling wall became a heat source, there was a problem that the cooling in the living room R was not performed efficiently. Further, the temperature around the indoor unit 1 of the air conditioner is high for the above reason, and the conditioned air (B ′ in FIG. 10) sent from the air outlet of the indoor unit 1 of the air conditioner is for the above reason. The specific gravity is larger than that of the air around the indoor unit 1 that has become high temperature, so that it descends due to gravity and falls into the living space in the center of the living room R. According to the figure, wind having a temperature lower by about 5 ° C. than the set temperature of 28 ° C. is pouring into the center of the living room R. For this reason, if the air flow is continued in the state where the temperature has reached the preset temperature, the cold wind will continue to hit the user, causing the user to feel uncomfortable, and locally lowering the user's body temperature and harming the health. There was a problem.

  The present invention has been made in view of the above problems, and by cooling the ceiling wall with heat and allowing the conditioned air sent from the outlet to flow along the ceiling wall by the Coanda effect, An object of the present invention is to provide an air conditioning method and an air conditioner that make the temperature distribution of the entire inside uniform.

In order to achieve the above object, the present invention provides an air conditioning method for harmonizing air in a living room by sucking air in the living room from a suction port and sending out harmonized air from an air outlet provided on the upper side wall of the living room. A step of sending cool air obliquely upward from the air outlet toward the ceiling wall, and a step of cooling the air so that the cold air reaching the ceiling wall does not condense the ceiling wall. After sequentially transmitting to the wall surface, the floor surface, and the wall surface on the air outlet side, the air is conditioned in the living room by sucking from the suction port. According to this configuration, the conditioned air (cold air) blown obliquely upward toward the ceiling wall is cooled to a temperature at which the ceiling wall is not condensed, thereby suppressing the warm air between the ceiling wall and the conditioned air. Thus, the decrease in the Coanda effect can be suppressed, and the temperature distribution in the living room can be made substantially uniform.

  The present invention also provides an air conditioner mounted on the upper side wall of the living room, sucks air in the living room from the air inlet of the air conditioner, and sends out the conditioned air from the outlet of the air conditioner. In the air conditioning method for harmonizing the air, a step of sending cool air obliquely upward from the outlet toward the ceiling wall during cooling operation of the air conditioner, and the cold air reaching the ceiling wall does not condense the ceiling wall Cooling the air to a ceiling wall, a wall surface facing the air conditioner, a floor surface, and a wall surface on the air conditioner side in order, and then sucking in the interior of the room from the air inlet It is characterized by air conditioning.

  In addition, the present invention is an air conditioner that realizes the air conditioning method having the above-described configuration, and includes an air passage that communicates from the suction port to the air outlet, and the air outlet is provided at a lower portion of the main body, and conditioned air is supplied. A first opening that sends out in a substantially horizontal direction to a downward direction; and a second opening that is arranged above the first opening and sends out conditioned air upward, wherein the second opening is It is characterized in that the air passage is communicated with the air passage by a branch passage which is inclined upward from the air passage.

  According to the present invention, in the air conditioner having the above-described configuration, the wind direction plate that changes the wind direction interrupts the path of the air that is sent out in a substantially horizontal direction to the lower direction and guides the air upward, and the path Is opened at the blowout port so as to be movable between a second position for guiding air in a substantially horizontal direction to a downward direction, and during the cooling operation, the wind direction plate moves to the first position from the blowout port. It is characterized in that the conditioned air is guided obliquely upward toward the ceiling wall.

  According to the air conditioning method of the present invention, the ceiling wall of the living room is cooled to harmonize the air in the living room, so that the temperature distribution in the living room can be made substantially uniform.

  Further, according to the air conditioner of the present invention, the conditioned air is sent obliquely upward toward the ceiling wall of the living room, and the ceiling wall of the living room is cooled to harmonize the air in the living room. Can be realized.

It is an outline side sectional view showing the indoor unit of the air harmony machine of a 1st embodiment by the present invention. It is a circuit diagram which shows the refrigerating cycle of the air conditioner of 1st Embodiment by this invention. It is a perspective view which shows the air flow in a living room by the air conditioning method of 1st Embodiment of this invention. It is a figure which shows the temperature distribution of the room center part cross section by the air conditioning method of 1st Embodiment of this invention. It is a schematic sectional side view which shows operation | movement of the indoor unit of 1st Embodiment by this invention. It is a perspective view which shows the airflow sent from the indoor unit of the air conditioner of 1st Embodiment by this invention. It is a schematic sectional side view which shows the indoor unit of the air conditioner of 2nd Embodiment by this invention. It is a perspective view which shows the airflow in the living room by the air conditioning system of 3rd Embodiment by this invention. It is a figure which shows the temperature distribution of the room center part cross section by the air conditioning system of 3rd Embodiment by this invention. It is a perspective view which shows the airflow in the living room by the conventional air conditioning method. It is a figure which shows the temperature distribution of the room center part cross section by the conventional air conditioning method.

  Embodiments of an air conditioning method and an air conditioner according to the present invention will be described below with reference to the drawings. For convenience of explanation, the same reference numerals are given to the same parts as those in the conventional example shown in FIGS. Here, the definition of the directional description used for description of this specification is demonstrated. In this specification, the term “rear surface of the indoor unit 1” refers to the surface where the indoor unit 1 and the wall surface are in contact with each other when the indoor unit 1 is installed on the wall surface, and the term “rear surface” refers to the front surface of the indoor unit 1. The opposite side of The direction from the rear surface to the front surface is referred to as the front, and the direction from the front surface to the rear surface is referred to as the rear.

  The upper surface of the indoor unit 1 refers to the surface on the ceiling side of the living room where the indoor unit 1 is installed, and the lower surface of the indoor unit 1 refers to the surface opposite to the upper surface. A direction from the lower surface to the upper surface is referred to as an upper direction, and a direction from the upper surface to the lower surface is referred to as a lower direction. Moreover, regarding the blowing direction of the air flow, the case where the air is sent out from the outlet 5 in parallel to the horizontal plane is blown out in the horizontal direction, and the case where the air is sent out at a positive angle with respect to the horizontal direction is blown out upward, A case where a positive angle is sent downward with respect to the direction blowing is referred to as a downward blowing. These directional descriptions are not limited to the indoor unit 1 and may be used.

  FIG. 1 is a schematic sectional side view showing an indoor unit 1 of an air conditioner according to a first embodiment. The indoor unit 1 of the air conditioner has a main body held by a cabinet 2. The cabinet 2 is provided with a claw portion (not shown) on the rear surface, and is supported by fitting the claw portion to a mounting plate (not shown) attached to an indoor wall. A front panel 3 is detachably attached to the front side of the cabinet 2 so as to cover the main body. A suction port 4 a is provided on the upper surface of the cabinet 2, and a suction port 4 c is formed by a gap between the upper end of the front panel 3 and the cabinet 2.

  In the gap between the lower end portion of the front panel 3 and the lower end portion of the cabinet 2, a blowout port including first and second opening portions 5 a and 5 b that are substantially rectangular extending in the width direction of the indoor unit 1 is formed. A clear boundary is not formed in the first and second openings 5a and 5b, but for convenience, the lower part of the outlet is the first opening 5a and the upper part is the second opening 5b. A substantially rectangular groove 28 extending in the width direction of the indoor unit 1 is formed above the second opening 5b.

  Inside the indoor unit 1, a blower path 6 that communicates from the suction ports 4 a and 4 c to the blower outlet is formed. A blower fan 7 that sends out air is disposed in front of the cabinet 2 in the blower path 6. As the blower fan 7, for example, a cross flow fan or the like can be used.

  An air filter 8 that collects and removes dust contained in the air sucked from the suction ports 4 a and 4 c 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. A space of a predetermined interval is provided between the front panel 3 and the indoor heat exchanger 9, and air taken in from the suction ports 4a and 4c contacts the indoor heat exchanger 9 over a wide area through the space. It is supposed to be.

The indoor heat exchanger 9 is connected to a compressor 62 (see FIG. 2), and the refrigeration cycle is operated by driving the compressor 62. By operating the refrigeration cycle, the indoor heat exchanger 9 is cooled to a temperature lower than the ambient temperature during cooling. During heating, the indoor heat exchanger 9 is heated to a temperature higher than the ambient temperature. A temperature sensor 61 (see FIG. 5) for detecting the temperature of the sucked air is provided between the indoor heat exchanger 9 and the air filter 8, and the side of the indoor unit 1 drives the air conditioner. A control unit is provided for controlling the above.

  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.

The ion generator 30 is installed in the front drain pan 10 with the discharge surface 30a facing the blower path 6 (see FIG. 5). Ions generated from the discharge surface 30 a of the ion generator 30 are discharged into the air blowing path 6 and blown out into the room from the blowout port 5. The ion generator 30 has a discharge electrode, and generates positive ions mainly composed of H ⁺ (H ₂ O) n when the applied voltage is positive by corona discharge, and mainly O ₂ ⁻ (H when negative. Generates negative ions composed of ₂ O) m.

  In the vicinity of the first opening 5a in the air blowing path 6, lateral louvers (wind direction plates) 11a and 11b that face the outside and can change the blowing angle in the vertical direction from substantially horizontal to downward 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.

  The second opening 5b communicates with the air blowing path 6 by a branch passage 13 that is inclined upward and branches from the air blowing path 6. The air flow path through which air flows is constituted by the air blowing path 6 and the branch path 13. An air guide plate 14 pivotally supported on the front panel 3 by a rotating shaft 14 a is provided at the open end of the branch passage 13. The air guide plate 14 is heat-insulated to prevent condensation.

  FIG. 2 is a circuit diagram showing a refrigeration cycle of the air conditioner. An outdoor unit (not shown) connected to the indoor unit 1 of the air conditioner is provided with a compressor 62, a four-way switching valve 63, an outdoor heat exchanger 64, a blower fan 65, and a throttle mechanism 66. One end of the compressor 62 is connected to an outdoor heat exchanger 64 through a four-way switching valve 63 by a refrigerant pipe 67. The other end of the compressor 62 is connected to the indoor heat exchanger 9 via a refrigerant pipe 67 via a four-way switching valve 63. The outdoor heat exchanger 64 and the indoor heat exchanger 9 are connected via a throttle mechanism 66 by a refrigerant pipe 67.

  When the cooling operation is started, the compressor 62 is driven and the blower fan 7 is rotated. Thus, a refrigeration cycle 68 is formed in which the refrigerant returns to the compressor 62 through the compressor 62, the four-way switching valve 63, the outdoor heat exchanger 64, the throttle mechanism 66, the indoor heat exchanger 9, and the four-way switching valve 63.

  By operating the refrigeration cycle 68, the indoor heat exchanger 9 is cooled to a temperature lower than the ambient temperature during cooling. Further, during the heating operation, the four-way switching valve 63 is switched and the blower fan 65 rotates, and the refrigerant flows in the opposite direction to the above. Thereby, the indoor heat exchanger 9 is heated to a temperature higher than the ambient temperature.

  In the air conditioner having the above configuration, when the cooling operation is started, the horizontal louvers 11a and 11b are set so that the first opening 5a is slightly opened as shown in FIG. 2 The opening 5b is set to a position where it is opened. The blower fan 7 is rotationally driven, refrigerant from an outdoor unit (not shown) flows to the indoor heat exchanger 9, and the refrigeration cycle is operated. Thereby, air is sucked into the indoor unit 1 from the suction ports 4 a and 4 c, and dust contained in the air is removed by the air filter 8.

  The air taken into the indoor unit 1 is cooled by exchanging heat with the indoor heat exchanger 9. And it distribute | circulates through the ventilation path 6 and the branch channel | path 13, and sends out toward the ceiling wall S diagonally upward, ie, the living room R, as shown by arrow A2 from the clearance gap between the 2nd opening part 5b of a blower outlet, and the horizontal louvers 11a and 11b. Is done. At this time, the air flowing along the upper wall surface 13a of the branch passage 13 is cut off the Coanda effect by the groove 28, and is guided obliquely upward and forward along the front panel 3 as indicated by the arrow A2.

FIG. 3 shows the flow in the room R of the cold airflow sent obliquely upwards forward. The air flow (B ″) sent obliquely upward and forward from the first and second openings 5a and 5b (see FIG. 1) is the indoor unit 1
The ceiling wall S of the living room R is reached while exchanging heat with the surrounding air, and the ceiling wall S is first cooled to such an extent that no condensation occurs. Wall surface and floor facing the indoor unit 1 from the ceiling wall S when the ceiling wall S is cooled and warm air is less likely to intervene between the ceiling wall S and the air flow (B "), and the Coanda effect continues far away. Surface, and the wall on the indoor unit 1 side in order, are sucked into the suction ports 4a and 4c from both sides of the indoor unit 1. Therefore, the direct wind from the indoor unit 1 is almost in the central part of the room R, that is, in the user's living area. Never fall.

  FIG. 4 shows the temperature distribution in the room in the stable cooling state that has reached the set temperature (28 ° C.) when the room R shown in FIG. The size of the room R is 6 tatami mats (height 2400 mm, width 3600 mm, depth 2400 mm) as in the conventional example of FIGS. 10 and 11 described above, and the measurement point of the room R indicated by the alternate long and short dash line D in FIG. A total of 48 points of 6 points and 8 points are measured on the central cross section at intervals of 600 mm in the height direction and the horizontal direction, respectively. Further, the airflow in the cooling stable state has a light air volume and a wind direction upward.

  According to the figure, there is an area where the room temperature is 2 ° C. to 3 ° C. lower than the installation temperature of 28 ° C. in the vicinity of the ceiling wall of the living room R, and it can be seen that the ceiling wall S is cooled. Further, in the living room R, the entire place excluding the above-described area, that is, the entire living area of the user substantially coincides with the set temperature 28 ° C., and the temperature variation is almost eliminated.

  As is clear from FIGS. 3 and 4 above, the conditioned air sent from the indoor unit 1 cools the ceiling wall S and greatly agitates the entire room R, so that the temperature distribution in the room R is uniform around the set temperature. Become. In other words, except for a part above the living room R, the entire living area of the user substantially coincides with the set temperature of 28 ° C., and a comfortable space can be obtained in which the temperature variation is small and direct wind hardly hits the user. .

  In addition, the indoor unit 1 of an air conditioner can also send conditioned air from the first opening 5a of the air outlet in a substantially horizontal direction to a downward direction as indicated by an arrow A1 in FIG. . FIG. 6 shows the airflow of the entire room at this time. The air (B) sent from the first opening 5a horizontally or downward flows through the room R as indicated by the arrow and returns to the suction ports 4a and 4c. Immediately after the start of the cooling operation of the air conditioner, first, the room R may be cooled by this air conditioning method, and after the room temperature in the room R is slightly lowered, the cooling method may be switched to the cooling method for cooling the ceiling wall S. It is more desirable that these controls can be performed by a user's instruction from a remote controller.

  Next, an air conditioning method and an air conditioner according to a second embodiment of the present invention will be described. The format of the indoor unit of the air conditioner is changed to the indoor unit 1b shown in FIG. 7, and the other configuration is the same as that of the first embodiment. In the air conditioner having the above-described configuration, when the cooling operation is started, an air flow is sent from the outlet 5 toward the ceiling wall S in the direction of A2, as shown in FIG. Therefore, the air conditioning method has substantially the same result as that of the first embodiment shown in FIGS. 3 and 4, and therefore, the same effect as that of the first embodiment can be obtained.

  Next, an air conditioning method and an air conditioner according to a third embodiment of the present invention will be described. The air conditioner of the third embodiment is a type of air conditioner in which there is no indoor unit in the living room R, such as a duct air conditioner or a whole building air conditioning system, and the air outlet 5 is installed on the side wall of the living room R as shown in FIG. System 100. Harmonic air is sent into the living room R from the air outlet 5 arranged on the side wall of the living room R, and a suction port 4 for discharging the air in the living room R to the outside is arranged at a position almost directly below the air outlet 5. Yes.

  In the air conditioner having the above-described configuration, when the cooling operation is started, a cold airflow is sent out from the blowout port 5 toward the front upper side, that is, toward the ceiling wall S as shown in FIG. FIG. 9 shows a temperature distribution in the room in a stable cooling state that has reached the set temperature (28 ° C.) when the room R shown in FIG. The size of the room R is 6 tatami mats (height 2400 mm, width 3600 mm, depth 2400 mm) as in the conventional example of FIGS. 10 and 11 described above, and the measurement point of the room R indicated by the alternate long and short dash line D in FIG. A total of 48 points of 6 points and 8 points are measured on the central cross section at intervals of 600 mm in the height direction and the horizontal direction, respectively.

  As is apparent from FIGS. 8 and 9, this embodiment also has substantially the same result as that of the first embodiment shown in FIGS. 3 and 4, so that the same effect as that of the first embodiment can be obtained.

  In addition, although the air inlet system 4 of the air conditioning system 100 of this embodiment is provided in the lower part of the side wall of the living room R, when this is abbreviate | omitted, it may exist in positions other than being shown by FIG. . In that case, although the effect of temperature equalization in the living room R is somewhat deteriorated, the position of the suction port 4 is not restricted, so the degree of freedom in the initial design of the living room R is increased.

The embodiments of the air conditioning method and the air conditioner according to the present invention have been described above, but the present invention is not limited to the above embodiments, and appropriate modifications are made without departing from the spirit of the present invention. Implemented. In addition, when the living room R is arranged on the top floor, it is most effective to cool the ceiling wall S. However, when the living room R is arranged, for example, in a position where the sun directly hits, the side wall on the west side is used. What is necessary is just to cool, and the living room R should just cool the south side wall, for example, when it is arranged southward.
Several air conditioning methods and air conditioners are added below.
[1] An air conditioning method is the air conditioning method in which air in a living room is sucked from a suction port, and the conditioned air is sent out from a blow-out port provided on an upper side wall of the living room to harmonize the air in the living room. A step of sending the cool air obliquely upward from the outlet toward the ceiling wall and a step of cooling the cool air to the ceiling wall so as not to dew the ceiling wall, the cool air facing the ceiling wall and the air outlet After sequentially transmitting to the wall surface, the floor surface, and the wall surface on the air outlet side, the air is conditioned in the living room by sucking from the suction port. According to this configuration, the conditioned air (cold air) blown obliquely upward toward the ceiling wall is cooled to a temperature at which the ceiling wall is not condensed, thereby suppressing the warm air between the ceiling wall and the conditioned air. Thus, the decrease in the Coanda effect can be suppressed, and the temperature distribution in the living room can be made substantially uniform.
[2] In the air conditioning method, an air conditioner is attached to the upper part of the side wall of the living room, the air in the living room is sucked from the air inlet of the air conditioner, and the conditioned air is sent out from the outlet of the air conditioner. In the air conditioning method for harmonizing the air in a living room, during the cooling operation of the air conditioner, a step of sending cool air obliquely upward from the outlet toward the ceiling wall, and the cold air reaching the ceiling wall Cooling the air to the extent that it does not condense, and sequentially transferring the cold air to the ceiling wall, the wall surface facing the air conditioner, the floor surface, and the wall surface on the air conditioner side, and then sucking it from the air inlet It is characterized by air conditioning in the living room.
[3] An air conditioner that realizes the air conditioning method having the configurations of [1] to [2], including an air passage that communicates from the suction port to the air outlet, and the air outlet is provided in a lower portion of the main body. And a first opening that sends conditioned air in a substantially horizontal direction to a downward direction, and a second opening that is arranged above the first opening and sends conditioned air upward. The opening is characterized in that it communicates with the air blowing path by a branch passage that is inclined upward and branches from the air blowing path.
[4] In the air conditioner having the configuration of [3], the wind direction plate that changes the wind direction blocks a path of the air that is sent out in a substantially horizontal direction to a downward direction, and guides the air upward, The air outlet is provided at the air outlet so as to be movable between a second position that opens the path and guides air in a substantially horizontal direction to a lower direction. During the cooling operation, the wind direction plate moves to the first position and the air outlet It is characterized in that the conditioned air is guided obliquely upward toward the ceiling wall.

DESCRIPTION OF SYMBOLS 1, 1b Indoor unit 2 Cabinet 3 Front panel 4a, 4c Suction port 5 Outlet 5a 1st opening part 5b 2nd opening part 6 Blower path 7 Blower fan 9 Indoor heat exchanger 11a, 11b Horizontal louver 12 Vertical louver 13 Branch passage 13a Upper wall surface 14 Wind guide plate 20 Wind guide portion 25 Vortex 28 Groove portion 29 Projection portion 60 Control portion 61 Temperature sensor 100 Air conditioning system

Claims (8)

In an air conditioner that attaches to the upper part of the side wall of a living room, sucks air in the room from the air inlet, sends air harmonized by cooling operation, heating operation, or dehumidifying operation from the outlet, and harmonizes the air in the room ,
It has a first upper wall and a lower wall that are inclined so as to go downward as it goes forward, and has a ventilation path that communicates between the inlet and the outlet.
While arranging a plurality of wind direction variable portions that vary the wind direction of the air outlet in the front-rear direction in the vicinity of the air outlet,
A second upper wall that is connected to the lower end of the first upper wall in the vicinity of the outlet and is inclined to rise upward as it goes forward;
A groove and / or a protrusion is provided at the upper end of the second upper wall;
The plurality of wind direction variable parts include at least the wind direction variable part facing the first upper wall, and the second
The wind direction variable part facing the upper wall,
During cooling operation, the plurality of wind direction variable portion, and the rear end of the front wind direction changing unit disposed in front, the front end of the front wind direction changing unit rear wind direction varying section disposed in the rear below the overlap in the vertical direction And rotating so that a cold airflow flows between the front wind direction variable portion and the rear wind direction variable portion,
The air direction of the air outlet is obliquely upward by the plurality of air direction variable portions, and the cold air is sent obliquely forward and upward from the air outlet so as to follow the ceiling wall of the room,
An air conditioning method comprising a first step of causing the air flow of the delivered cool air to flow along the ceiling wall sequentially to the opposing wall facing the side wall, the floor surface, and the side wall on the air conditioner side, and sucking from the suction port. When,
An air conditioner comprising a second step of sending cold air horizontally or downward from the air outlet.   2. The air conditioner according to claim 1, wherein the airflow direction changing unit rotates so that a front end thereof is inclined obliquely upward during a cooling operation. At the start of the cooling operation of the air conditioner, cool air is sent obliquely upward and forward from the outlet so that the airflow of cool air follows the ceiling wall,
An air conditioning method comprising a first step of causing the air flow of the delivered cool air to flow along the ceiling wall sequentially to the opposing wall facing the side wall, the floor surface, and the side wall on the air conditioner side, and sucking from the suction port. The air conditioner according to claim 1 or 2, wherein the air conditioner is cooled until the ceiling is cooled to such an extent that condensation does not occur. When performing the air conditioning method comprising the first step, a plurality of wind direction variable portions that vary the wind direction of the blower outlet to the left and right are arranged in the vicinity of the blower outlet. The air conditioner according to any one of claims 1 to 3, wherein the air conditioner is located at the front center of the air conditioner. At the start of cooling operation, perform an air conditioning method comprising a second step of sending cold air horizontally or downward from the outlet,
After the room temperature has dropped,
The cool air is sent obliquely upward and forward from the outlet so that the cool air flow is along the ceiling wall,
An air conditioning method comprising a first step of causing the air flow of the delivered cool air to flow along the ceiling wall sequentially to the opposing wall facing the side wall, the floor surface, and the side wall on the air conditioner side, and sucking from the suction port. The air conditioner according to claim 1 or 2, wherein the air conditioner is performed.   It has an air conditioning method that makes it difficult for warm air to intervene between the ceiling wall and the cool air flow by cooling the ceiling wall, and prevents the cool air flow reaching the ceiling wall from falling into the center of the living room The air conditioner according to any one of claims 1 to 5. The air conditioner according to any one of claims 1 to 6,
A ventilation path communicating from the inlet to the outlet;
The outlet has a first opening that sends conditioned air in a substantially horizontal direction to a lower direction, and a second opening that is arranged above the first opening and sends conditioned air upward.
The air conditioner is characterized in that the second opening portion communicates with the air blowing path by a branch passage that branches upwardly from the air blowing path. With a remote controller,
The air conditioner according to any one of claims 1 to 7, wherein the remote controller enables a user to indicate whether the air conditioning method includes a first step or an air conditioning method includes a second step.

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