JP5884720B2 - Air conditioner - Google Patents

Description

The present invention relates to an air conditioner in which an up-and-down wind direction plate and an auxiliary up-and-down wind direction plate are arranged in the vicinity of an air outlet.

In a conventional air conditioner, a blower fan arranged in an air flow path from the suction port to the blowout port,
There is a thing provided with the up-and-down wind direction board arranged near the blower outlet, and the auxiliary up-and-down wind direction board arranged above the up-and-down wind direction board. The vertical wind direction plate and the auxiliary vertical wind direction plate are rotatably supported and extend along the longitudinal direction of the air outlet. Moreover, the upper wall part of the air flow path leading to the air outlet is provided so as to incline downward toward the front, and the auxiliary vertical wind direction plate is disposed in the vicinity of the upper wall part inclining downward.

JP 2009-79846 A

In the above air conditioner, the auxiliary up-and-down wind direction plate is disposed in the vicinity of the upper wall portion that is inclined downward, so that the blown air flowing along the upper wall portion collides with the auxiliary up-and-down air direction plate and the air volume is increased. There is a problem that decreases. Therefore, the present inventors bring the auxiliary vertical airflow direction plate into contact with the upper wall portion and make the auxiliary vertical airflow direction plate substantially parallel to the upper wall portion, thereby reducing the air volume of the blown air flowing along the upper wall portion. There are many.

However, when the auxiliary up-and-down airflow direction plate is brought into contact with the upper wall during cooling operation, the cool air from the blower fan is almost on the upper surface side (between the auxiliary up-and-down airflow direction plate and the upper wall). Since it does not flow, there is a problem in that condensation forms on the upper surface of the auxiliary up-and-down wind direction plate and water drops are attached.

Therefore, an object of the present invention is to provide an air conditioner capable of preventing condensation on the upper surface of an auxiliary up-and-down wind direction plate and water droplets from being attached during cooling operation.

An air conditioner according to a first aspect of the present invention includes a blower fan disposed in an air flow path from a suction port to a blowout port, a vertical wind direction plate supported rotatably in the vicinity of the blowout port, and the vertical wind direction. An auxiliary up-and-down wind direction plate rotatably supported above the plate, and a control means for controlling the auxiliary up-and-down air direction plate, wherein the control means has a part of the auxiliary up-and-down air direction plate during cooling operation. When operating in the first state in contact with the upper wall portion of the air flow path, the auxiliary vertical wind direction plate is temporarily rotated at a predetermined first timing so that the auxiliary vertical wind direction plate is After changing to the second state that does not contact the upper wall portion of the air flow path, the auxiliary up-and-down wind direction plate is automatically rotated at a predetermined second timing to return to the first state. .

In this air conditioner, when the cooling operation is performed in a state where the cooling air hardly flows on the upper surface side (between the auxiliary vertical wind direction plate and the upper wall portion) of the auxiliary vertical wind direction plate, the air conditioner is temporarily at a predetermined timing. Further, since the upper surface side of the auxiliary up-and-down wind direction plate (between the auxiliary up-and-down wind direction plate and the upper wall portion) is changed to a state in which the cold air flows, it is possible to prevent condensation from forming on the upper surface of the auxiliary up-and-down wind direction plate .

In the air conditioner according to the second aspect of the present invention, in the air conditioner according to the first aspect of the present invention, during the cooling operation, the time during which the auxiliary up-and-down wind direction plate is in the first state, It is characterized by being longer than the time in two states.
In the air conditioner according to the third aspect of the invention, in the air conditioner according to the first or second aspect of the invention, the upper wall portion of the air flow path is inclined downwardly toward the front, and the first upper wall portion, The first
A second upper wall portion disposed so that the air flow path is widened in front of the upper wall portion, and the control means is configured such that a part of the auxiliary up-and-down wind direction plate is in the second upper side during cooling operation. When operating in the first state in contact with the wall portion, the auxiliary up-and-down wind direction plate is temporarily rotated at a predetermined timing so that the auxiliary up-and-down wind direction plate contacts the second upper wall portion. The auxiliary up-and-down wind direction plate in the first state and the second state is disposed closer to the second upper wall than the surface extending the first upper wall during cooling operation. It is characterized by being.

In this air conditioner, the upper wall part of the air flow path is inclined such that the first upper wall part is inclined downward toward the front, and the second is arranged so that the air flow path is widened in front of the first upper wall part. In the case of having the upper wall portion, it is possible to prevent condensation on the upper surface of the auxiliary up-and-down wind direction plate and water droplets.
In addition, since the auxiliary up-and-down wind direction plate is disposed on the second upper wall side from the surface extending from the first upper wall portion, the cooling operation is performed with a part of the auxiliary up-and-down air direction plate in contact with the second upper wall portion. Is performed, the auxiliary up-and-down wind direction plate is not arranged in the flow direction of the cold air from the blower fan. Therefore, it is possible to prevent the air volume from being reduced by the cold air from the blower fan colliding with the auxiliary up-down wind direction plate.

In the air conditioner according to a fourth aspect of the present invention, in the air conditioner according to any one of the first to third aspects, the second state from the first state at the timing determined based on the cooling operation time.
It is characterized by changing to a state.

In this air conditioner, when the cooling operation is continued for a long time and dew condensation occurs on the upper surface of the auxiliary up-and-down wind direction plate and water droplets are attached, the air conditioner can be changed to a state in which the cool air flows on the upper surface side of the auxiliary up-and-down wind direction plate. .

In the air conditioner according to a fifth aspect of the present invention, in the air conditioner according to any one of the first to fourth aspects of the invention, the control means starts from the first state at a timing determined based on the blowing temperature. It changes to a 2nd state, It is characterized by the above-mentioned.

In this air conditioner, in the operation state in which the blowing temperature is low and condensation is formed on the upper surface of the auxiliary up-and-down wind direction plate and water droplets are attached, the upper surface side of the auxiliary up-and-down air direction plate can be changed to a state in which cold air flows.

An air conditioner according to a sixth invention is the air conditioner according to any one of the first to fifth inventions, comprising an indoor heat exchanger disposed in the air flow path, wherein the control means rotates the fan. The first state is changed to the second state at a timing determined based on the number, the indoor heat exchange temperature, and the room temperature.

In this air conditioner, the blowing temperature can be estimated based on the fan rotation speed, the indoor heat exchange temperature, and the room temperature, and the auxiliary up-and-down wind direction plate can be controlled based on the blowing temperature, so there is no need to detect the blowing temperature. .

  As described above, according to the present invention, the following effects can be obtained.

In the first aspect of the invention, when the cooling operation is performed in a state where the cool air hardly flows on the upper surface side (between the auxiliary vertical wind direction plate and the upper wall portion) of the auxiliary vertical wind direction plate, it is temporarily at a predetermined timing. In addition,
Since the upper surface side of the auxiliary up-and-down wind direction plate (between the auxiliary up-and-down wind direction plate and the upper wall portion) is changed to a state in which cool air flows, it is possible to prevent condensation from forming on the upper surface of the auxiliary up-and-down wind direction plate.

In the third aspect of the invention, the upper wall portion of the air flow path is inclined such that the first upper wall section is inclined downward toward the front, and the second is disposed so that the air flow path is widened in front of the first upper wall section. In the case of having the upper wall portion, it is possible to prevent condensation on the upper surface of the auxiliary up-and-down wind direction plate and water droplets. In addition, since the auxiliary up-and-down wind direction plate is disposed on the second upper wall side from the surface extending from the first upper wall portion, the cooling operation is performed with a part of the auxiliary up-and-down air direction plate in contact with the second upper wall portion. Is performed, the auxiliary up-and-down wind direction plate is not arranged in the flow direction of the cold air from the blower fan. Therefore, it is possible to prevent the air volume from being reduced by the cold air from the blower fan colliding with the auxiliary up-down wind direction plate.

In the fourth aspect of the invention, when the cooling operation is continued for a long period of time and condensation occurs on the upper surface of the auxiliary up-and-down wind direction plate and water droplets are attached, the upper surface side of the auxiliary up-and-down air direction plate can be changed to a state in which cool air flows. .

In the fifth aspect of the invention, in the operation state where the blowout temperature is low and the dew condensation is formed on the upper surface of the auxiliary up-and-down wind direction plate and water droplets are attached, the upper surface side of the auxiliary up-and-down air direction plate can be changed to a state in which cold air flows.

In the sixth aspect of the invention, since the blowing temperature can be estimated based on the fan rotation speed, the indoor heat exchange temperature, and the room temperature, and the auxiliary up / down wind direction plate can be controlled based on the blowing temperature, there is no need to detect the blowing temperature. .

1 is an external view of an air conditioner according to an embodiment of the present invention. It is sectional drawing of an air conditioner when air_conditionaing | cooling operation is performed in the state which a part of auxiliary | assistant vertical wind direction board contact | abutted to the upper wall part. It is a figure explaining the structure of an auxiliary | assistant vertical wind direction board. It is sectional drawing of an air conditioner when a cooling operation is performed in the state which an auxiliary | assistant vertical wind direction plate does not contact | abut on an upper wall part. It is a functional block diagram of the air conditioner shown in FIG. It is a flowchart which shows the flow of the air conditioner shown in FIG.

  Hereinafter, an air conditioner according to an embodiment of the present invention will be described with reference to the drawings.

[Configuration of air conditioner]
An air conditioner according to an embodiment of the present invention includes an indoor unit 1 shown in FIG. 1 and an outdoor unit (not shown). The indoor unit 1 has an elongated shape in one direction as a whole, and is installed on the wall surface of the room so that its longitudinal direction is horizontal. In the following description, the direction protruding from the wall to which the indoor unit 1 is attached is referred to as “front”, and the opposite direction is “rear”.
Called. Further, the left-right direction shown in FIG. 1 is simply referred to as “left-right direction”.

[Indoor unit 1]
As shown in FIG. 2, the indoor unit 1 includes a casing 2, a blower fan 3 housed in the casing 2, an indoor heat exchanger 4, left and right wind direction plates 5, up and down wind direction plates 6, auxiliary up and down wind direction plates 7 and the like. I have. The indoor unit 1 is provided with a heat exchange temperature sensor 8 that detects the temperature of the indoor heat exchanger 4 (indoor heat exchange temperature) and an indoor temperature sensor 9 that detects the room temperature.

The casing 2 includes a substantially rectangular parallelepiped grill 11 and a front panel 12 that covers the front surface of the grill 11.
And have. A suction port 13 that is a grid-like opening that is long in the left-right direction is formed on the upper surface of the grill 11, and an air outlet 14 that is a rectangular opening that is long in the left-right direction is formed on the lower surface of the grill 11. Yes. And at the time of air-conditioning operation, the air sucked from the suction port 13 by driving the blower fan 3 arranged in the air flow path from the suction port 13 to the blower outlet 14 is
After being heated or cooled in the indoor heat exchanger 4, the air is blown into the room from the outlet 14.

<Air channel>
As shown in FIG. 2, the upper wall portion 15 of the air flow path extending from the left and right wind direction plates 5 to the blower outlet 14 among the air flow paths extending from the suction inlet 13 to the blowout outlet 14 is inclined first downward. 1 upper wall part 16 and 2nd upper wall part 1 arrange | positioned so that an air flow path may spread in front of the 1st upper wall part 16
7. Specifically, the second upper wall portion 17 extends substantially horizontally toward the front, and is disposed so as to expand upward by about 30 ° with respect to the surface S extending the first upper wall portion 16. ing. Moreover, the lower wall part 18 of the air flow path from the left-right wind direction board 5 to the blower outlet 14 is formed by the grill 11, and inclines downward toward the front. The second upper wall portion 17 side (upward) from the surface S obtained by extending the first upper wall portion 16 is the surface S obtained by extending the first upper wall portion 16.
Compared with the lower wall 18 side (downward), the air volume of the blown air from the blower fan 3 is small.

<Up-down wind direction plate 6>
As shown in FIG. 2, the vertical wind direction plate 6 is disposed in the vicinity of the air outlet 14, and is supported by the support member 19 so as to be rotatable around the rotation shaft 19 a. The up-and-down wind direction plate 6 is connected to the air outlet 14.
It extends along the longitudinal direction (left and right direction) of the air and changes the air direction of the air blown out from the air outlet 14 in the vertical direction, and opens and closes the air outlet 14.

The up-and-down wind direction plate 6 is driven by a driving motor (not shown) to rotate the rotating shaft 19a.
The range from the upper structure contact (fully closed state) to the lower structure contact (fully open state) can be rotated around the center. The up / down wind direction plate 6 can be controlled by an operation of a remote controller (not shown), and can perform a “swing operation” in which the up / down wind direction plate 6 is reciprocally movable within a predetermined range (range from the upper limit position to the lower limit position). . Also, by operating the remote control,
The vertical wind direction plate 6 can be fixed at a desired position in the range from the upper limit position to the lower limit position.

<Auxiliary vertical wind direction plate 7>
As shown in FIG. 2, the auxiliary up-and-down air direction plate 7 has a second upper wall portion 17 above the up-and-down air direction plate 6.
It is arrange | positioned in the vicinity of and is supported by the support member 20 so that the periphery of the rotating shaft 20a can be rotated. This auxiliary up-and-down wind direction board 7 is extended along the longitudinal direction (left-right direction) of the blower outlet 14,
The wind direction of the air blown out from the blower outlet 14 in the vertical direction together with the vertical wind direction plate 6 is changed. In the following description, the lower side of the two surfaces of the auxiliary vertical wind direction plate 7 is the surface 7a (lower surface).
The upper side is referred to as a back surface 7b (upper surface).

As shown in FIG. 3A, the auxiliary up-and-down wind direction plate 7 is a rectangular plate-shaped member, and three support members 20 are arranged on the back surface 7b. The support member 20 has an attachment hole 21 and is rotatably attached to a support shaft (not shown) disposed in the second upper wall portion 17. Therefore, the auxiliary up-and-down wind direction plate 7 can rotate around the rotation shaft 20a that is the central axis of the support shaft. Further, as shown in FIG. 3B, as the rear end portion 7 d of the auxiliary vertical wind direction plate 7 approaches the rear end of the auxiliary vertical wind direction plate 7 in a cross section perpendicular to the rotation axis 20 a of the auxiliary vertical wind direction plate 7. It inclines in the direction away from the rotating shaft 20a (in FIG.3 (b), the rear-end part 7 of the auxiliary up-down wind direction board 7
d is inclined downward as it approaches the rear). In the present embodiment, the auxiliary up / down wind direction plate 7 refers to a rectangular plate-like member, and the support member 20 and a support shaft (not shown) are not included in the auxiliary up / down wind direction plate 7.

The auxiliary up-and-down wind direction plate 7 is driven by a driving motor (not shown) to rotate the rotating shaft 2.
A range from the upper structure (fully closed state) to the lower structure (fully opened state) can be rotated around 0a. The auxiliary up-and-down wind direction plate 7 is not controllable by operating a remote controller, and the position of the auxiliary up-and-down wind direction plate 7 is automatically determined depending on the operating state of the air conditioner.

In this air conditioner, as shown in FIG. 2, a part of the auxiliary up-and-down wind direction plate 7 (specifically, the front end portion 7 c) is disposed so as to contact the second upper wall portion 17 during the cooling operation. The Further, the entire region of the auxiliary up-and-down wind direction plate 7 is on the second upper wall portion 17 side (upward) from the surface S extending from the second upper wall portion 17.
Arranged. Accordingly, the cold air flowing along the first upper wall portion 16 flows on the surface 7a side of the auxiliary up-and-down air direction plate 7 with almost no collision with the auxiliary up-and-down air direction plate 7 as shown by arrows in FIG. It is blown out from the outlet 14. On the other hand, since there is almost no gap between the tip 7c of the auxiliary vertical wind direction plate 7 and the second upper wall portion 17, the back surface 7b side of the auxiliary vertical wind direction plate 7 (the auxiliary vertical wind direction plate 7 and the second upper wall portion). 17), almost no cold air flows.

[Remote controller]
A remote controller (not shown) is capable of infrared communication with the indoor unit 1 shown in FIG. 1 and an outdoor unit (not shown), and transmits various commands related to the control of the indoor unit 1 and the outdoor unit according to user operations.
With this remote controller, the user can select a fixed position of the up-and-down air direction plate 6, a swing operation of the up-and-down air direction plate 6, each operation mode such as a cooling operation, a heating operation, and a dehumidifying operation, a set temperature, and the like.

[Control unit 10]
The control unit 10 (control means) includes a CPU (Central Processing Unit) and a ROM (Read Only).
It is composed of a plurality of hardware such as a memory (RAM) and a random access memory (RAM). The ROM stores a control program for controlling the operation of the control unit 10.
And this control part 10 has the timer part 21, as shown in FIG. 5, the ventilation fan 3, the left-right wind direction board 5, the up-and-down wind direction board 6, the auxiliary up-and-down wind direction board 7, the heat exchanger temperature sensor 8, indoor temperature The sensor 9 is electrically connected.

This control unit 10 receives the operation of the remote controller and the like, when the fixed position of the up-and-down air direction plate 6, the swing operation of the up-and-down air direction plate 6, each operation mode such as cooling operation, heating operation, dehumidifying operation, etc. are set. The vertical wind direction plate 6 and the auxiliary vertical wind direction plate 7 are respectively arranged at predetermined positions, and the vertical wind direction plate 6 and the auxiliary vertical wind direction plate 7 are swung in the vertical direction.

<Change from the first state to the second state>
Further, during the cooling operation, the control unit 10 is operated in a state where a part of the auxiliary vertical wind direction plate 7 is in contact with the second upper wall portion 17 (first state), and the cooling operation time and The auxiliary up-and-down wind direction plate 7 is temporarily rotated downward at a timing determined based on the blowing temperature, and the auxiliary up-and-down air direction plate 7 is changed to a state where the auxiliary up-and-down air direction plate 7 does not contact the second upper wall portion 17 (second state). To do. Auxiliary up and down wind direction plate 7
Is changed so as not to contact the second upper wall portion 17, a gap is formed between the auxiliary up-and-down wind direction plate 7 and the second upper wall portion 17 as shown in FIG. 4. Therefore, as indicated by the arrows in FIG. 4, the cool air from the blower fan 3 is separated from the front surface 7 a side and the back surface 7 b side (that is, the auxiliary vertical wind direction plate 7 and the second upper wall portion 17 of the auxiliary vertical wind direction plate 7. (Between) and the state of flowing.

Here, the timing determined based on the cooling operation time and the blow-out temperature specifically refers to a state in which a part of the auxiliary vertical wind direction plate 7 is in contact with the second upper wall portion 17 during the cooling operation. It means that a predetermined time t1 (for example, 2 hours) has elapsed since the time has elapsed and the temperature of the cool air blown out from the air outlet 14 has become equal to or lower than the predetermined temperature. When the cooling operation is continued for a long time and the blowing temperature is low, the temperature difference between the front surface 7a and the back surface 7b of the auxiliary up-and-down air direction plate 7 becomes large, and condensation is likely to occur on the back surface 7b of the auxiliary up-and-down air direction plate 7. It becomes a state. Therefore, the state where the cold air flowing along the first upper wall portion 16 flows on both the front surface 7a side and the back surface 7b side of the auxiliary up-and-down wind direction plate 7 before the water droplets are formed on the back surface 7b of the auxiliary up-and-down wind direction plate 7. In order to prevent water droplets from being attached to the back surface 7b of the auxiliary up-and-down wind direction plate 7.

In addition, in this air conditioner, the blowing temperature sensor which detects blowing temperature is not provided,
Since the blowout temperature cannot be directly detected, the blowout temperature is determined based on the fan rotation speed of the blower fan 3, the indoor heat exchange temperature detected by the heat exchange temperature sensor 8, and the indoor temperature detected by the room temperature sensor 9. By estimating, it is judged whether the blowing temperature is below a predetermined temperature. Specifically, when the fan rotational speed is equal to or lower than the predetermined rotational speed, the indoor heat exchange temperature is equal to or lower than the predetermined temperature, and the indoor temperature is equal to or lower than the predetermined temperature, the blowing temperature is equal to or lower than the predetermined temperature. Judging that there is.

Further, as shown in FIG. 4, even when the auxiliary vertical wind direction plate 7 is not in contact with the second upper wall portion 17, the entire area of the auxiliary vertical wind direction plate 7 is from the surface S extending from the second upper wall portion 17. Arranged above. Therefore, even if the auxiliary up-and-down wind direction plate 7 is not in contact with the second upper wall portion 17, the auxiliary up-and-down air direction plate 7 hardly blocks the flow of cool air from the blower fan 3. As a result, in a state where the auxiliary up-and-down wind direction plate 7 does not contact the second upper wall portion 17, it is possible to prevent the air volume from being reduced by the cold air from the blower fan 3 colliding with the auxiliary up-and-down air direction plate 7.

<Change from the second state to the first state>
Further, the control unit 10 is determined based on the cooling operation time when the auxiliary vertical wind direction plate 7 is operating in a state (second state) in which the auxiliary vertical wind direction plate 7 is not in contact with the second upper wall portion 17 during the cooling operation. The auxiliary up-and-down wind direction plate 7 is rotated upward at the timing, and as shown in FIG. 2, the auxiliary up-and-down wind direction plate 7 is again brought into a state (first state) in which the auxiliary up-and-down wind direction plate 7 comes into contact with the second upper wall portion 17. change.

Specifically, when a predetermined time t2 (for example, 1 hour) elapses after the auxiliary up-and-down wind direction plate 7 is changed to a state where it does not contact the second upper wall portion 17, the auxiliary up-and-down wind direction plate 7 is It changes to the state which contact | abuts to the upper wall part 17. FIG. When the cooling operation is continued for a long time after the auxiliary up-and-down air direction plate 7 is changed to the state where it does not contact the second upper wall portion 17, the cool air from the blower fan 3 is cooled.
By flowing through both the front surface 7a and the back surface 7b, the temperature difference between the front surface 7a and the back surface 7b is reduced, and the back surface 7b of the auxiliary up-and-down airflow direction plate 7 is less likely to condense. Therefore, the amount of cool air from the blower fan 3 is increased by changing the state so that a part of the auxiliary up-and-down wind direction plate 7 abuts against the second upper wall portion 17 again.

In this air conditioner, when the cooling operation is performed for a long time, the auxiliary up-and-down wind direction plate 7
A state in which a part of the auxiliary vertical wind direction plate 7 does not contact the second upper wall portion 17 (second state) is repeated. That is, the swing operation of the auxiliary vertical wind direction plate 7 is performed. However, this “swinging operation” is a second state in which the dew condensation occurs on the back surface 7b of the auxiliary up-and-down wind direction plate 7 and water droplets are attached, and the second state returns to a state in which dew condensation is difficult on the back surface 7b of the auxiliary up-and-down wind direction plate 7. Therefore, the nature of the swinging movement is different from that of a normal swinging movement (which has almost no rest time and does not cause a problem of condensation on the back surface 7b of the auxiliary vertical wind direction plate 7).

The timer unit 21 includes a predetermined time t1 when determining whether or not a predetermined time t1 has elapsed since a part of the auxiliary up / down wind direction plate 7 is in contact with the second upper wall portion 17, and the auxiliary up / down air direction plate 7 A timer for measuring the predetermined time t2 when determining whether or not the predetermined time t2 has elapsed since the wind direction plate 7 is changed to a state where it does not contact the second upper wall portion 17 is driven and controlled.

[flow]
Next, the operation (flow) of the air conditioner according to the present embodiment will be described with reference to FIG. At the start, it is assumed that the cooling operation is being performed and a part of the auxiliary vertical wind direction plate 7 is in contact with the second upper wall portion 17 (first state).

First, it is determined whether or not the cooling operation is being performed (S1). When not in cooling operation (S1: N
o) Repeat step S1. On the other hand, when the cooling operation is being performed (S1: Yes), it is determined whether or not a part of the auxiliary vertical wind direction plate 7 is in contact with the second upper wall portion 17 (first state) (S2). . When a part of the auxiliary vertical wind direction plate 7 is in contact with the second upper wall portion 17 (S2:
Yes), it is determined whether or not a predetermined time t1 has elapsed since a part of the auxiliary up-and-down wind direction plate 7 is in contact with the second upper wall portion 17 (S3).

And when predetermined time t1 passes (S3: Yes), it is judged whether the blowing temperature of the cold air blown from the blower outlet 14 is below predetermined temperature (S4). In this air conditioner, as described above, since the blowout temperature cannot be directly detected, the fan rotation speed, the indoor heat exchange temperature,
And it is judged whether the blowing temperature is below predetermined temperature by estimating blowing temperature based on room temperature. Specifically, in step S4, it is determined whether or not the fan speed is equal to or lower than a predetermined speed, the indoor heat exchange temperature is equal to or lower than the predetermined temperature, and the indoor temperature is equal to or lower than the predetermined temperature. Yes.

In step S4, when the blowing temperature is equal to or lower than the predetermined temperature (S4: Yes), the control unit 10 temporarily rotates the auxiliary vertical wind direction plate 7 downward, and the auxiliary vertical wind direction plate 7 is the second upper wall. It changes to the state (2nd state) which does not contact | abut the part 17 (S5). On the other hand, when the predetermined time t1 has not elapsed (S3: No), or when the blowing temperature is higher than the predetermined temperature (S4: No), the process returns to step S1.

In step S2, the auxiliary up-and-down wind direction plate 7 is not in contact with the second upper wall portion 17 (
In the second state) (S2: No), it is determined whether or not a predetermined time t2 has elapsed since the auxiliary up-and-down wind direction plate 7 is not in contact with the second upper wall portion 17 (S6). When the predetermined time t2 has elapsed (S6: Yes), the control unit 10 rotates the auxiliary up-and-down air direction plate 7 upward so that the auxiliary up-and-down air direction plate 7 contacts the second upper wall portion 17 (first State) (S7). On the other hand, when the predetermined time t2 has not elapsed (S6: No), the process returns to step S1.

[Features of the air conditioner of this embodiment]
The air conditioner of this embodiment has the following characteristics.

In this air conditioner, as shown in FIG. 2, a state in which a part of the auxiliary vertical wind direction plate 7 is in contact with the second upper wall portion 17 (first state), that is, the back surface 7b side of the auxiliary vertical wind direction plate 7 ( Auxiliary up and down wind direction plate 7
4 and the second upper wall portion 17), when the cooling operation is performed in a state in which the cool air hardly flows, the auxiliary up-and-down wind direction plate 7 temporarily becomes the second upper wall portion as shown in FIG. 17 is not in contact with (
2nd state), that is, the back surface 7b side of the auxiliary vertical wind direction plate 7 (the auxiliary vertical wind direction plate 7 and the second upper wall portion 1).
7) is changed to a state in which cold air flows, so that the back surface 7b (upper surface) of the auxiliary up-and-down wind direction plate 7
In this case, it is possible to prevent water droplets from being condensed due to dew condensation.

Moreover, in this air conditioner, the back surface 7b side (between the auxiliary up-and-down wind direction plate 7 and the 2nd upper wall part 17) of the auxiliary up-and-down air direction plate 7 is the timing determined based on the cooling operation time and the blowing temperature. Since it is changed to a state where the cold air flows, in the state where the cooling operation is continued for a long time and the blowing temperature is low, that is, in the operation state in which condensation occurs on the back surface 7b of the auxiliary up-and-down wind direction plate 7 and water droplets are attached.
The back surface 7b side of the auxiliary up-and-down wind direction plate 7 can be changed to a state in which cold air flows.

Further, in this air conditioner, the upper wall portion 15 of the air flow path is inclined such that the first upper wall section 16 is inclined downward toward the front, and the air flow path is widened in front of the first upper wall section 16. In the case of having the second upper wall portion 17 arranged, it is possible to prevent condensation on the back surface 7b (upper surface) of the auxiliary up-and-down wind direction plate 7 and water droplets. Further, since the auxiliary vertical wind direction plate 7 is disposed on the second upper wall portion 17 side from the surface S extending the first upper wall portion 16, a part of the auxiliary vertical wind direction plate 7 contacts the second upper wall portion 17. In the case where the cooling operation is performed in contact, the auxiliary up / down airflow direction plate 7 is not arranged in the flow direction of the cool air from the blower fan 3. Therefore, it is possible to prevent the air volume from being reduced by the cold air from the blower fan 3 colliding with the auxiliary up-and-down wind direction plate 7.

Moreover, in this air conditioner, since the blowing temperature can be estimated based on the fan rotational speed, the indoor heat exchange temperature, and the indoor temperature, the auxiliary up-and-down wind direction plate 7 can be controlled based on the estimated blowing temperature. There is no need to directly detect the blowing temperature by providing a blowing temperature sensor or the like.

In this air conditioner, the auxiliary up-and-down wind direction plate 7 is provided with the second upper wall portion 17 during the cooling operation.
When the vehicle is operated in a state where it does not come into contact (second state), the auxiliary up-and-down wind direction plate 7 comes into contact with the second upper wall portion 17 again at the timing determined based on the cooling operation time (first state). Status). Therefore, when the back surface 7b side of the auxiliary up-and-down wind direction plate 7 is changed to a state in which the cold air flows, it becomes difficult to condense on the back surface 7b of the auxiliary up-and-down wind direction plate 7,
Since the back surface 7b side of the auxiliary up-and-down wind direction plate 7 can be changed to a state in which the cool air does not flow, the cool air from the blower fan 3 collides with the auxiliary up-and-down air direction plate 7 in a state where condensation does not easily occur on the back surface 7b of the auxiliary up-and-down wind direction plate 7. This can prevent the air volume from decreasing.

As mentioned above, although embodiment of this invention was described, it should be thought that the specific structure of this invention is not limited to the said embodiment. The scope of the present invention is shown not only by the description of the above-described embodiment but also by the scope of claims for patent, and further includes meanings equivalent to the scope of claims for patent and all modifications within the scope.

[Modification]
In the air conditioner of the present embodiment, as shown in FIG. 2, the auxiliary vertical wind direction plate 7 is provided with the second upper wall portion 17.
However, the auxiliary up-and-down wind direction plate 7 may be disposed in the vicinity of the first upper wall portion 16.

Further, in the air conditioner of the present embodiment, as shown in FIG. 2, the upper wall portion 15 of the air flow path is inclined to the front, the first upper wall portion 16 and the first upper wall portion 16. The second upper wall portion 17 is disposed so that the air flow path is widened in front of the air flow path, but the configuration of the upper wall portion 15 of the air flow path is not limited to the above. For example, the upper wall portion 15 of the air flow path may be composed of only the first upper wall portion 16.

Moreover, in the air conditioner of this embodiment, as shown in FIG. 2, the front-end | tip part 7 of the auxiliary up-and-down wind direction board 7 is shown.
c is in contact with the upper wall portion 15 of the air flow path, but the portion in contact with the upper wall portion 15 is the tip portion 7c.
Not limited to. For example, the substantially entire back surface 7 b of the auxiliary up-and-down wind direction plate 7 may be in contact with the upper wall portion 15. By doing so, the auxiliary up-and-down wind direction plate 7 becomes more parallel to the upper wall portion 15, and it is possible to further prevent the cool air from the blower fan 3 from colliding with the auxiliary up-and-down air direction plate 7 and reducing the air volume.

Moreover, in the air conditioner of this embodiment, although the timing which changes the back surface 7b side of the auxiliary | assistant vertical wind direction board 7 to the state where cold air flows was determined based on the cooling operation time and the blowing temperature, the cooling operation time and the blowing temperature It may be determined based on either one of them, or may be determined based on another predetermined method (for example, remote control operation).

Further, in the air conditioner of the present embodiment, the timing determined based on the cooling operation time and the blowing temperature is specifically that a part of the auxiliary up-and-down wind direction plate 7 contacts the second upper wall portion 17. It means that the predetermined time t1 has elapsed since the start of the operation and the blowing temperature is equal to or lower than the predetermined temperature, but the timing determined based on the cooling operation time and the blowing temperature is limited to the above. is not. For example, the above timing may be when the state where the blowing temperature is equal to or lower than a predetermined temperature continues for a predetermined time during the cooling operation.

Moreover, in the air conditioner of this embodiment, since the blowing temperature cannot be directly detected, the blowing temperature is not more than a predetermined temperature by estimating the blowing temperature based on the fan rotation speed, the indoor heat exchange temperature, and the room temperature. However, it may be possible to directly detect the blowing temperature by providing a blowing temperature sensor.

Moreover, in the air conditioner of this embodiment, after the back surface 7b side of the auxiliary up-and-down wind direction plate 7 is changed to the state where the cold air flows, the back surface 7b side of the auxiliary up-and-down air direction plate 7 is changed again to the state where the cold air does not flow. The timing to perform is determined based on the cooling operation time, but may be determined based on the blowing temperature, may be determined based on the cooling operation time and the blowing temperature, or other predetermined methods (for example, It may be determined based on remote control operation.

Further, in the air conditioner of the present embodiment, as shown in FIG. 4, the entire region of the auxiliary vertical wind direction plate 7 in a state where the auxiliary vertical wind direction plate 7 is not in contact with the second upper wall portion 17 (second state). However, the auxiliary up-and-down wind direction plate 7 may be disposed on the surface S extending from the second upper wall portion 17 or below the surface S.

Further, in the air conditioner of the present embodiment, the auxiliary up-and-down air direction plate 7 is changed except for the case where the auxiliary up-and-down air direction plate 7 is changed to a state in which the auxiliary up-and-down air direction plate 7 does not contact the upper wall portion 15 during the cooling operation (second state). It is supposed that a part of is arranged so as to contact the upper wall portion 15. However, this air conditioner may have an operation mode in which the auxiliary up-and-down wind direction plate 7 is fixed at a predetermined position where it does not contact the upper wall portion 15, and the auxiliary up-and-down air direction plate 7 is swung in the up-and-down direction. You may provide the operation mode which performs the normal swing operation | movement to move. When these operation modes are executed, FIG.
The operation (flow) of the present embodiment shown in FIG.

Moreover, in the air conditioner of this embodiment, although the left-right wind direction board 5 is provided, the left-right wind direction board 5 does not need to be.

Moreover, in the air conditioner of this embodiment, although the auxiliary up-and-down wind direction board 7 was made uncontrollable by remote control operation, it may be controllable by remote control operation.

Further, during the dehumidifying operation of the air conditioner, the same operation as that during the cooling operation may be performed. Therefore, “at the time of cooling operation” in the present invention includes “at the time of dehumidifying operation”.

By using the present invention, it is possible to prevent condensation from forming on the upper surface of the auxiliary up-and-down wind direction plate during the cooling operation.

DESCRIPTION OF SYMBOLS 1 Indoor unit 3 Blower fan 4 Indoor heat exchanger 6 Vertical wind direction board 7 Auxiliary vertical wind direction board 13 Suction inlet 14 Outlet 15 Upper wall part 16 1st upper wall part 17 2nd upper wall part

Claims (6)

A blower fan arranged in an air flow path from the suction port to the blowout port;
An up-and-down wind direction plate supported rotatably in the vicinity of the air outlet;
An auxiliary up-down wind direction plate supported rotatably above the up-down wind direction plate;
Control means for controlling the auxiliary up-and-down wind direction plate,
The control means includes
During cooling operation, when operating in the first state where a part of the auxiliary up-down wind direction plate is in contact with the upper wall portion of the air flow path, the auxiliary up-down wind direction is temporarily at a predetermined first timing. The auxiliary vertical wind direction plate is automatically rotated at a predetermined second timing after the plate is rotated to change the second state in which the auxiliary vertical wind direction plate does not contact the upper wall of the air flow path. Then, the air conditioner is returned to the first state. 2. The air conditioner according to claim 1, wherein during the cooling operation, the time during which the auxiliary up-down wind direction plate is in the first state is longer than the time during which the auxiliary up-down wind direction plate is in the second state. The upper wall portion of the air flow path is inclined to the front and the first upper wall portion is inclined downward, and the second upper wall portion is disposed so that the air flow path is widened in front of the first upper wall portion. And
The control means includes
During cooling operation, when the auxiliary vertical wind direction plate is operating in the first state where a part of the auxiliary vertical wind direction plate is in contact with the second upper wall portion, the auxiliary vertical wind direction plate is temporarily rotated at a predetermined timing. Let me
The auxiliary up-and-down wind direction plate is changed to a second state in which it does not contact the second upper wall portion,
The auxiliary up-and-down wind direction plates in the first state and the second state are the first and second wind direction plates during the cooling operation .
3. The air conditioner according to claim 1, wherein the air conditioner is disposed closer to the second upper wall than a surface obtained by extending the upper wall. The air conditioner according to any one of claims 1 to 3, wherein the control means changes from the first state to the second state at a timing determined based on a cooling operation time. The air conditioner according to any one of claims 1 to 4, wherein the control means changes from the first state to the second state at a timing determined based on the blowing temperature. An indoor heat exchanger disposed in the air flow path,
The said control means changes from the said 1st state to the said 2nd state at the timing determined based on fan rotation speed, indoor heat exchanger temperature, and room temperature, The any one of Claims 1-5 characterized by the above-mentioned. Item 1. An air conditioner according to item 1.

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