JP6179794B2 - Air conditioner - Google Patents

Description

  The present invention relates to an air conditioner for performing air conditioning in a room, and particularly relates to prevention of dew condensation at an air outlet in the air conditioner.

  In an air conditioner used in a general household, in order to suppress noise and vibration in the room, a large noise source such as a compressor and a vibration source are usually provided in the outdoor unit to reduce noise and vibration. A separator type in which a small number of fans, heat exchangers, and the like are arranged in an indoor unit is used. The indoor unit configured as described above is installed on a wall surface or the like in the room, and an air conditioning operation is performed so that the room has a desired temperature. The outdoor unit and the indoor unit are mechanically and electrically connected to each other by a refrigerant pipe and a control wiring, and perform an air conditioning operation in cooperation with each other.

  The indoor unit of the air conditioner is provided with a blowout port for blowing out temperature-controlled air into the room, and the blowout port is provided with a wind direction changing means for changing the direction of the blown air. ing. As the air direction changing means, in order to send out the air blown from the outlet toward a desired area in the room, the air flow changed from the outlet to the upper and lower air direction changing blades for changing the flow of the air in the vertical direction, and from the outlet There is used a wind direction changing blade composed of left and right wind direction changing blades that change the flow of the blown air in the left and right direction.

  As an up-and-down air direction change blade in a conventional air conditioner, for example, it projects from the air outlet when the air conditioner is operating, changes the flow direction of the air blown from the air outlet, and when the air conditioner is stopped, the air outlet (For example, refer to Patent Document 1).

Japanese Patent No. 4110863

  In the indoor unit of the air conditioner, the heat-exchanged air flows along a rear guider provided downstream of the fan for sending out the air, and is provided by a vertical airflow direction change blade provided rotatably on the downstream side of the rear guider. It is the structure which blows off from a blower outlet. The up-and-down air direction changing blade has a function of opening and closing a blow-out port for blowing out into the room and greatly changing the air blowing direction up and down.

  In the conventional air conditioner configured as described above, the airflow that flows along the rear guider during the cooling operation is provided because the vertical airflow direction changing blade is rotatably provided at the most downstream end of the guide surface of the rear guider. However, it flows into the gap between the rear guider and the up / down wind direction changing blade, and the cold air flowing into the gap cools the lower surface of the air conditioner and the lower side of the up / down air direction changing blade, so that air with moisture on the cooled surface When contacted, dew condensation was generated in the vicinity of the air outlet, and when this state persisted, there was a problem that condensed water dropped.

  In the present invention, as described above, it is possible to suppress the air from flowing into the gap between the rear guider and the up / down airflow direction change blades during the cooling operation, which is a problem in the conventional air conditioner, and the dew condensation near the air outlet An object of the present invention is to provide a highly reliable air conditioner that can prevent generation.

In order to achieve the above object, in the air conditioner according to the present invention,
A main body that has an air intake and an air outlet, and that configures the appearance,
A heat exchanger for exchanging heat from the air taken from the intake;
A fan for generating an air flow for exchanging heat in the heat exchanger and blowing out from the outlet;
A rear guider having a guide surface that is arranged downstream of the fan and guides the heat-exchanged air flow to the outlet, and rotates with a predetermined gap at the most downstream end of the guide surface of the rear guider. A blade that is provided and that controls the direction of the airflow flowing along the rear guider,
With
The rear guider has a step near the most downstream end of the guide surface, a first step blowing surface formed upstream from the step, and a second step blowing surface downstream from the step,
An air flow in a blowing direction guided by the first step blowing surface and the second step blowing surface is configured to flow above a gap between the rear guider and the blade.

  According to the present invention, the air flowing along the rear guider is prevented from flowing into the gap between the rear guider and the up-and-down air direction changing blade, and the occurrence of condensation near the outlet is suppressed during cooling operation. Therefore, it is possible to provide a highly reliable air conditioner that can be used.

FIG. 1 is a longitudinal sectional view showing a schematic configuration of an indoor unit in an air conditioner according to Embodiment 1 of the present invention. FIG. 2 is a longitudinal sectional view showing a state during air conditioning operation in the air conditioner of the first embodiment. FIG. 3 is a longitudinal sectional view showing an operation example of the up / down air direction changing blades during the air conditioning operation in the air conditioner of the first embodiment. FIG. 4 is a longitudinal sectional view showing an operation example of the up / down air direction changing blades during the air conditioning operation in the air conditioner of the first embodiment. FIG. 5 is a longitudinal sectional view showing an operation example of the up / down air direction changing blades during the air conditioning operation in the air conditioner of the first embodiment. FIG. 6 is an enlarged longitudinal sectional view showing a configuration of a general air conditioner. FIG. 7 is an enlarged longitudinal sectional view showing a dew condensation prevention mechanism in the air conditioner of the first embodiment. FIG. 8 is a longitudinal sectional view showing a state in which the up / down wind direction changing blade in the first embodiment is rotatably held by the main body. FIG. 9 is a longitudinal sectional view showing a groove for holding dew in the air conditioner of the first embodiment.

The air conditioner according to the first aspect of the present invention includes:
A main body that has an air intake and an air outlet, and that configures the appearance,
A heat exchanger for exchanging heat from the air taken from the intake;
A fan for generating an air flow for exchanging heat in the heat exchanger and blowing out from the outlet;
Rear guider having a guide surface for guiding the flow of air is disposed downstream heat exchanger of said fan to I said outlet, and, said rear guider is stepped difference at the most downstream end near the guide surface, than the previous SL step A first step blowing surface formed on the upstream side, a second step blowing surface formed on the downstream side of the step,
An air flow in a blowing direction guided by the first step blowing surface and the second step blowing surface is configured to flow above a gap between the rear guider and the blade. In the air conditioner according to the first aspect of the present invention configured as described above, the first step blowing surface formed upstream of the step provided near the most downstream end of the guide surface of the rear guider is The air blown out from the stepped discharge surface of 1 flows above the gap between the blade and the rear guider. Therefore, during the cooling operation, air can be prevented from flowing into the gap between the rear guider and the blades without reducing the blowing efficiency, and condensation in the vicinity of the outlet can be prevented.

Moreover, in the air conditioner of the first aspect according to the present invention configured as described above, the second step air outlet surface can further suppress the inflow of air into the gap between the rear guider and the blade, It is possible to reliably prevent the occurrence of condensation near the air outlet during the cooling operation.

In the air conditioner according to the second aspect of the present invention, the first step air outlet surface according to the first aspect has a cross-sectional shape cut along the direction of the airflow formed in a curve. In the air conditioner according to the second aspect of the present invention configured as described above, the air blown from the first step blowing surface can be more easily flowed above the gap between the rear guider and the blade. . Therefore, it is possible to more easily suppress the air from flowing into the gap between the rear guider and the blades, and it is possible to prevent the occurrence of condensation near the air outlet during the cooling operation .

In the air conditioner according to the third aspect of the present invention , the second step blowing surface in the first aspect has a cross-sectional shape cut along the direction of the airflow formed in a curve. In the air conditioner according to the first aspect of the present invention configured as described above, the blowing direction from the second step blowing surface can be more easily set upward than the gap between the rear guider and the blade. . Therefore, it is possible to more easily suppress the air from flowing into the gap between the rear guider and the blade, and it is possible to reliably prevent the occurrence of condensation near the air outlet during the cooling operation.

In the air conditioner according to the fourth aspect of the present invention, the blowing direction of the air flow guided by the second step blowing surface in the first aspect or the first aspect is the first step blowing. It faces upward from the blowing direction of the airflow guided by the surface. In the air conditioner of the fifth aspect according to the present invention configured as described above, air is introduced into the gap between the rear guider and the blades by further increasing the blowing direction from the second step blowing surface. Can be further prevented, and the occurrence of condensation near the air outlet during cooling operation can be reliably prevented.

In the air conditioner according to a fifth aspect of the present invention, in the first aspect to the fourth aspect, the blade has a blade rotation portion that houses a rotatable blade rotation shaft. And
The main body has a blade holding portion that rotatably holds the blade rotation shaft of the blade, and a main body bearing portion in a portion facing the blade rotation portion,
The blade rotation shaft and the blade holding portion are formed of different materials,
The blade rotation part and the main body bearing part are formed of different materials. In the air conditioner according to the fifth aspect of the present invention configured as described above, the frictional resistance between the blade rotation shaft and the blade holder can be reduced. Therefore, it is possible to reduce the sound generated by the friction between the blade rotation shaft and the blade holding portion when the blade rotation shaft rotates. Moreover, by using the above materials, it is possible to reduce noise generated by friction even when the blade rotating portion and the main body bearing portion are in contact with each other due to variations in processing accuracy. As a result, the gap between the blade rotating portion and the rear guider can be reduced, and the sealing performance that suppresses the inflow of air into the gap can be improved.

In the air conditioner according to a sixth aspect of the present invention, in the first aspect to the fifth aspect, dew is retained on an opposing surface that forms the gap between the rear guider and the blade. Has a groove for. In the air conditioner according to the seventh aspect of the present invention configured as described above, when dew condensation occurs in the vicinity of the air outlet, the dew condensation water is retained in the groove for retaining dew, and the dew condensation water drops. Can be prevented.

  Hereinafter, embodiments of the air conditioner of the present invention will be described with reference to the accompanying drawings. In each drawing, each element is exaggerated for easy explanation. In addition, in the air conditioner of the following embodiment, although a specific structure is demonstrated, this invention is not limited to the specific structure of the following embodiment, The same technical idea Various air conditioners to which a configuration based on the above is applied are included.

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

  FIG. 1 is a longitudinal sectional view showing a schematic configuration of an indoor unit in an air conditioner according to Embodiment 1 of the present invention. FIG. 1 shows a state when the air-conditioning operation of the air conditioner of Embodiment 1 is stopped.

  As shown in FIG. 1, the indoor unit 1 includes a main body 2 having a front opening 2a and an upper opening 2b that serve as an air intake, and an outlet 2c that blows out heat-exchanged air. A movable front panel 3 that opens and closes the opening 2a is provided. Inside the main body 2, a filter 4 for removing dust contained in room air, a heat exchanger 5 for exchanging heat of the taken room air, and the front opening 2 a and the upper surface opening 2 b are taken in through the filter 4. And a fan 6 that is a cross-flow fan for generating an air flow for exchanging heat of the indoor air with the heat exchanger 5 and blowing it out of the air outlet 2c into the room. Further, in the main body 2 of the indoor unit 1, a ventilation path 10 extending from the downstream side of the fan 6 to the upstream side of the air outlet 2 c is disposed on the downstream side of the fan 6 and a rear guider 7 that guides the flow of air, and the rear guider 7 is formed by a stabilizer 11 disposed so as to face 7 and both side walls (not shown) of the main body 2.

  In the air outlet 2c for blowing out the heat exchanged air in the air conditioner of the first embodiment, the air outlet 2c can be opened and closed and the air blowing direction can be changed in the vertical direction. A vertical airflow direction changing blade 8 as means is provided. Furthermore, left and right wind direction changing blades 9 which are left and right wind direction changing means capable of changing the air blowing direction to the left and right are provided inside the air outlet 2c.

  In the state at the time of stopping the air conditioning operation shown in FIG. 1, the front panel 3 is configured to be in close contact with the main body 2 and close the front opening 2a, and the up / down airflow direction changing blade 8 is housed in the outlet 2c. The blower outlet 2c is configured to be closed.

  FIG. 2 is a longitudinal sectional view showing a state during the air conditioning operation in the air conditioner of the first embodiment. As shown in FIG. 2, the front panel 3 is configured to move a predetermined distance in a direction away from the main body 2 to open the front opening 2 a.

  The up-and-down wind direction changing blade 8 includes a lower blade 8a that is an example of a first blade, and an upper blade 8b that is an example of a second blade provided above the lower blade 8a. The upper and lower wind direction changing blades 8 control the blowing direction of the air blown out from the air outlet 2c in cooperation with the lower blade 8a and the upper blade 8b. The lower blade 8a is configured to rotate by a predetermined angle by the rotation operation of the upstream rotation portion. The upper blade 8b is configured to rotate and move toward and away from the lower blade 8a while being held substantially parallel to the lower blade 8a by control, for example.

  Note that a guide mini blade 8c, which is an example of a third blade, is provided on the upper blade 8b of the vertical wind direction changing blade 8. The guide mini blade 8c has a function of generating an air flow that protects the main flow formed by the lower blade 8a and the upper blade 8b. Thus, by providing the guide mini blade 8c on the upper surface of the upper blade 8b, mixing of the surrounding air to the main flow is prevented, and the attenuation of the flow in the main flow is suppressed.

  The left and right wind direction changing blades 9 are composed of a plurality of blades, and are controlled to change the blowing direction of the air blown out from the outlet 2c to the left and right directions.

  When the air conditioner starts the air conditioning operation, the front panel 3 is moved away from the main body 2 by a predetermined distance to open the front opening 2a, and the up / down wind direction changing blade 8 is opened to open the air outlet 2c. Is done. Thus, the fan 6 is driven in a state where the front opening 2a and the air outlet 2c are opened, and the room air is taken into the indoor unit 1 through the front opening 2a and the upper opening 2b. The taken-in room air passes through the filter 4, undergoes heat exchange in the heat exchanger 5, and is sucked into the fan 6. The heat-exchanged air sucked into the fan 6 passes through the ventilation path 10 formed on the downstream side of the fan 6 and is blown out from the air outlet 2c.

  When the air from the fan 6 passes through the ventilation path 10, the air from the fan 6 is guided by the rear guider 7 and the stabilizer 11 disposed on the downstream side of the fan 6, and blown out from the air outlet 2 c. Air from the fan 6 that is a cross-flow fan flows along the rear guider 7 provided on the outer periphery of the fan 6 and is blown out from the outlet 2c.

  The blowing direction of the air blown out from the air outlet 2c is controlled by the up / down air direction changing blade 8 and the left / right air direction changing blade 9. Operations such as angle adjustment of the up / down air direction changing blade 8 and the left / right air direction changing blade 9 are controlled by a control device (not shown) that controls the air conditioner.

[Operation of up and down wind direction change blade]
3 to 5 show an example of the operation of the up / down air direction changing blade 8 during the air-conditioning operation in the air conditioner of Embodiment 1, and the rotation operation of the lower blade 8a and the upper blade 8b forming the main flow is shown. It is a longitudinal cross-sectional view shown. The vertical wind direction changing blade 8 is configured such that the upper blade 8b is rotated together with the lower blade 8a by the rotation of the lower blade 8a. The up-and-down air direction changing blade 8 in the air conditioner of Embodiment 1 is provided at the outlet 2c at the most downstream end 7c of the guide surface 7a of the rear guider 7 and exhibits a high rectifying effect on the air from the outlet 2c. In addition to having a function as a diffuser, it also has a function of controlling the wind direction in the vertical direction.

  FIG. 3 is an operation example when the resistance of the air path from the rear guider 7 to the lower blade 8a in the air conditioner of Embodiment 1 is minimum. In the following description, the position of the lower blade 8a is referred to as a maximum air volume forming position, and the state where the lower blade 8a is disposed at the maximum air volume forming position is referred to as a maximum air volume forming state. In the maximum air volume formation position shown in FIG. 3, the air from the blower outlet 2c is blown off diagonally downward. The lower blade 8a of the up-and-down wind direction changing blade 8 at this time exhibits the function as a diffuser to the maximum.

  FIG. 4 is an operation example during the cooling operation of the air conditioner of the first embodiment. It is an operation example in which the lower blade 8a is disposed upward from the above-described maximum air volume formation state, and the blowing direction of the air from the air outlet 2c is a substantially horizontal direction.

  FIG. 5 is an operation example during normal heating operation of the air conditioner of the first embodiment. The lower blade 8a is disposed downward from the above-described maximum air volume formation state, and the blowing direction of air from the air outlet 2c is a substantially downward direction.

  In the air conditioner of the first embodiment, in the vicinity of the most downstream end of the guide surface 7a of the rear guider 7 in order to suppress the flow of air (cold air) between the rear guider 7 and the up / down airflow direction changing blades 8 during the cooling operation. A step 71 is formed on the surface. This step 71 has a configuration that prevents the air flowing from the upstream of the rear guider 7 from flowing into the gap 12 between the rear guider 7 and the up-and-down airflow direction changing blade 8.

Next, in Embodiment 1, it demonstrates using the structure of a general air conditioner so that it may be easy to understand the airflow which flows from the rear guider 7 to the up-and-down wind direction change blade | wing 8 and blows off from the blower outlet 2c.
FIG. 6 is an enlarged longitudinal sectional view showing the rear guider 107 and the up / down wind direction changing blade 108 in a general air conditioner. The air conditioner shown in FIG. 6 shows an operation example when the up / down air direction change blades 108 are arranged at the maximum air volume forming position in order to minimize the air path resistance from the rear guider 107 to the up / down air direction change blades 108. . In the maximum air flow formation state shown in FIG. 6, the downstream portion of the guide surface 107 a serving as the bottom surface of the air path in the rear guider 107 and the blowing surface 108 aa serving as the bottom surface of the air path in the up-and-down air direction changing blade 108 are substantially on the same plane. Is arranged. Here, the downstream portion of the guide surface 107a in the rear guider 107 and the blowing surface 108aa of the up / down airflow direction changing blade 108 are flat surfaces. The blowing surface 108aa of the up / down air direction changing blade 108 is an upward surface of the up / down air direction changing blade 108 shown in FIG. 6, and is a surface that guides the main flow of the air blown out from the outlet 102c. Here, as shown in FIG. 6, it is formed by the guide surface 107a of the rear guider 107 when the air path resistance from the rear guider 107 to the up / down air direction changing blade 108 is minimum, and the blowing surface 108aa surface of the up / down air direction changing blade 108. the blowing direction G ₁ in the direction of the first balloon by Rukazero.

  In the general air conditioner configured as shown in FIG. 6, the air blown from the most downstream end 107 c of the rear guider 107 during the cooling operation flows into the gap 112 between the upper and lower airflow direction change blades 108 and is blown. There is a problem that condensation occurs in the vicinity of the outlet. The air conditioner of Embodiment 1 according to the present invention solves the above problems, and the dew condensation prevention mechanism in the air conditioner of Embodiment 1 will be described in detail below.

  The dew condensation prevention mechanism in the air conditioner according to Embodiment 1 of the present invention will be described with reference to FIG. FIG. 7 is an enlarged longitudinal sectional view showing the vicinity of a step 71 which is a dew condensation prevention mechanism in the air conditioner according to Embodiment 1 of the present invention. The air conditioner shown in FIG. 7 shows an operation example when the wind path resistance from the rear guider 7 to the up / down air direction changing blade 8 is the minimum air volume forming state.

As shown in FIG. 7, a step 71 is formed as a dew condensation prevention mechanism in the vicinity of the most downstream end of the guide surface 7a of the rear guider 7 in the first embodiment. The upstream portion of the guide surface 7a of the rear guider 7 shown in FIG. 7 has the same shape as the upstream portion of the guide surface 107a of the rear guider 7 shown in FIG. That is, in the upstream portion of the guide surface 7a, the air flowing direction is substantially the same direction (first blowing direction G ₁ ). The most downstream end near the guide surface 7a of the rear guider 7 in the first embodiment has a step 71 is provided, in the first step blowing surface 70 on the upstream side than the step 71, upward from the first blowing direction G ₁ The inclined surface is formed. That is, the flow of air blown along the first stepped blowing surface 70 continuing from the guide surface 7a of the upstream portion of the rear guider 7 is a first blowing upward from the direction G _1. The first step blowing surface 70 that is an inclined surface is formed, for example, in an arbitrary shape such as a curved line or a straight line in a cross-sectional shape cut along the direction of airflow. The vicinity of the most downstream end of the guide surface 7a of the rear guider 7 means a downstream portion of the guide surface 7a of the rear guider 7 formed at a predetermined distance from the most downstream end 7c of the guide surface 7a of the rear guider 7. The predetermined distance is such that the air blown from the first step blowing surface 70 formed by providing the step 71 flows upward from the gap 12 between the lower blade 8a and the rear guider 7 at least during the cooling operation. It is set as follows.

As described above, in the air conditioner of the first embodiment, the first air flow flows along the guide surface 7a in the upstream portion of the rear guider 7 by the first step blow-out surface 70 formed by the step 71. blown upward from the direction G _1. Incidentally, the direction of the airflow defining second and blowing direction G ₂ blown along the first stepped balloon surface 70.

Moreover, the air conditioner of Embodiment 1 has the 2nd level | step difference blowing surface 72 formed. The second step blowing surface 72 is a guide surface downstream of the step 71. Second step blowing surface 72 also has an upward inclined surface from the guide surface 7a of the rear guider 7 (first blowing direction G _1). For example, the inclined surface is formed in an arbitrary shape such as a curved or straight cross-sectional shape cut along the airflow. Therefore, the air is guided along the second step blowing surface 72 flows toward the first balloon upward from direction G _1. In addition, the direction of the airflow flowing along the second step blowing surface 72 is defined as a _third blowing direction G3. In the first embodiment, the second blowing direction G ₂ and the third blowing direction G _{3 with} respect to the _first blowing direction G ₁ will be described as being configured to be the same direction. It is not limited to a structure, The structure from which an inclination angle and / or a shape differ may be sufficient. For example, the inclination of the second step blowing surface 72 is made larger than the inclination of the first step blowing surface 70, and the direction of the air flow blown from the second step blowing surface 72 (third blowing direction G ₃ ) is set. the first may be directed upward from the direction of the air current blown out from the step blowing surface 70 (second blowing direction G _2). By making the blowing direction from the second step blowing surface 72 further upward, air is prevented from flowing into the gap 12 between the rear guider 7 and the lower blade 8a, and in the vicinity of the blowing outlet during the cooling operation. It is possible to reliably prevent the occurrence of condensation. Further, for example, the shape of the second step blowing surface 72 may be formed as a curved surface, and the first step blowing surface 70 may be formed as a flat surface.

  The height of the step 71, that is, the difference in height between the most distal end 7b of the first step blowing surface 70 and the uppermost end 7d of the second step blowing surface 72 is preferably in the range of 0.5 mm to 1 mm, for example. . Here, the difference in height means the distance on the paper surface of the same step 7b of the first step blowing surface 70 and the uppermost end 7d of the second step blowing surface 72 shown in FIG. When the height of the step 71 is smaller than 0.5 mm, the air blown from the first step blowing surface 70 during the cooling operation as shown in FIGS. 3 and 4 is caused by the rear guider 7 and the lower blade 8a. It is difficult to prevent the condensation from flowing into the gap 12 between them. On the other hand, when the height of the step 71 is larger than 1 mm, the air blown from the first step blowing surface 70 can be suppressed from flowing into the gap 12 between the rear guider 7 and the lower blade 8a. Since the air path resistance by the level | step difference 71 increases, ventilation efficiency falls.

Next, the effect | action of the dew condensation prevention mechanism in the air conditioner of Embodiment 1 is demonstrated using FIG. In the operation example shown in FIG. 7, the flow of air from the guide surface 7a of the rear guider 7 to the blowing surface 8aa of the lower blade 8a during cooling operation is indicated by a white arrow. During the cooling operation, the air from the fan 6 flows along the first step blowing surface 70 from the guide surface 7a of the rear guider 7 disposed on the downstream side of the fan 6, as indicated by a white arrow. Air blown out from the first step blowing surface 70 flows toward the second blowing direction G _2, it flows toward the upper direction than the first blowing direction G _1. Therefore, the air blown out from the first blow-out surface 70 can be prevented from flowing into the gap 12 between the lower blade 8a and the rear guider 7.

Further, the air blown out from the second step blowing surface 72, it flows toward the third blowing direction G _3, flows toward the upper direction than the first blowing direction G _1. Therefore, in the air conditioner of Embodiment 1, it is possible to further suppress the air from flowing into the gap 12 between the lower blade 8a and the rear guider 7 by the second step blowing surface 72.

  As described above, the air conditioner according to Embodiment 1 is configured to have the step 71, so that air can be prevented from flowing into the gap 12 between the lower blade 8a and the rear guider 7, and the vicinity of the air outlet. It is possible to prevent the occurrence of condensation on the surface.

  FIG. 8 is a longitudinal sectional view showing a state in which the up-and-down air direction changing blade 8 in the first embodiment is rotatably held by the main body 2. As shown in FIG. 8, the lower blade 8 a of the up / down airflow direction changing blade 8 has a lower blade rotating shaft 8ac, and the lower blade rotating shaft 8ac is a lower blade holding portion 14 fixed to the main body 2. Is held rotatably. The lower blade 8a includes a lower blade rotation portion 8ab that houses the lower blade rotation shaft 8ac, and a blade portion 8ad having a blowing surface 8aa, and a portion of the lower blade rotation portion 8ab that faces the main body 2 The cross-sectional shape orthogonal to the lower blade rotation shaft 8ac has an arcuate appearance centered on the lower blade rotation shaft 8ac. The main body bearing portion 13 which is a portion facing the lower blade rotation portion 8ab in the main body 2 has a cross-sectional shape orthogonal to the lower blade rotation shaft 8ac formed in an arc shape centering on the lower blade rotation shaft 8ac. Yes. That is, the main body bearing portion 13 has a hollow shape, and a part of the lower blade rotating portion 8ab is disposed in the hollow with a predetermined gap.

  In the air conditioner of Embodiment 1, the lower blade rotation shaft 8ac and the lower blade holding portion 14 are formed of different materials, and the lower blade rotation portion 8ab and the main body bearing portion 13 are formed of different materials. Has been. Different materials are materials having different hardness and / or density, for example. For example, the lower blade rotation shaft 8ac and the lower blade rotation portion 8ab are formed of a material such as ABS resin or syndiotactic polystyrene, and the lower blade holding portion 14 and the main body bearing portion 13 are formed of a material such as polyacetal or polyamide. Is formed. With such a configuration, the frictional resistance between the lower blade rotation shaft 8ac and the lower blade holding portion 14 can be reduced. Therefore, it is possible to reduce the sound generated by the friction between the lower blade rotation shaft 8ac and the lower blade holding portion 14 when the lower blade rotation shaft 8ac rotates. Further, by using the material as described above, it is possible to reduce noise generated by friction even when the blade rotation portion 8ab and the main body bearing portion 13 are in contact with each other due to variations in processing accuracy. As a result, the gap 12 between the lower blade rotating portion 8ab and the rear guider 7 can be reduced, and in the configuration of the air conditioner of the first embodiment, a seal that suppresses the inflow of air into the gap 12. Can be improved.

  FIG. 9 is an example in which a groove 15 for holding dew is provided in the air conditioner of the first embodiment. As shown in FIG. 9, the air conditioner of Embodiment 1 has a groove 15 to prevent the condensed water from flowing down when condensation occurs. The groove 15 is provided on the surface facing the lower blade 8 a, that is, on the main body bearing portion 13 in the gap 12 between the lower blade 8 a and the main body bearing portion 13 so as to hold the condensed water near the outlet. Thus, the air conditioner of Embodiment 1 can hold the condensed water generated in the vicinity of the air outlet and prevent the condensed water from dripping by providing the groove 15 for holding the dew. In FIG. 9, in the gap 12 between the lower blade 8 a and the main body bearing portion 13, the groove 15 is provided on the surface facing the lower blade 8 a, i.e., the main body bearing portion 13. When condensation occurs, the groove 15 may be provided on the surface facing the main body bearing portion 13, that is, the lower blade 8a.

  As described above, in the air conditioner according to Embodiment 1 of the present invention, the air blown from the first step blowing surface 70 is provided by providing the step 71 in the vicinity of the most downstream end of the guide surface 7a of the rear guider 7. Is prevented from flowing into the gap 12 between the lower blade 8a and the rear guider 7. With such a configuration, it is possible to suppress the occurrence of condensation near the air outlet during cooling operation without reducing the air blowing efficiency.

  Furthermore, the air conditioner according to the first embodiment of the present invention forms the second step blowing surface 72 on the downstream side of the step 71, thereby further forming a gap 12 between the lower blade 8 a and the rear guider 7. It is possible to suppress the inflow of air, and it is possible to reliably prevent the occurrence of condensation near the air outlet during the cooling operation.

  The height of the step 71 of the rear guider 7 in the present invention is set in the range of 0.5 mm to 1 mm as an example so that the occurrence of dew condensation during cooling operation can be suppressed without reducing the blowing efficiency. However, the height of the step 71 is not limited to the range of 0.5 mm to 1 mm when it is desired to reliably prevent the occurrence of condensation near the air outlet even if the air blowing efficiency is lowered. For example, the height of the step 71 is made larger than 1 mm so as to suppress the air blown from the first step blowing surface 70 from flowing into the gap 12 between the lower blade 8a and the rear guider 7 more reliably. May be. By adopting such a configuration, the air blowing efficiency is lowered, but the air blown from the first step blowing surface 70 is reliably suppressed from flowing into the gap 12 between the lower blade 8a and the rear guider 7. It is possible to prevent condensation from occurring near the air outlet during cooling operation.

The air conditioner of Embodiment 1 of the present invention, both the first blowing surface 70 second blow-out surface 72 describes a configuration having an upward inclination from the first blowing direction G _1, the first may be configured to include a blowing surface 70 only in the first balloon structure having direction G ₁ from upward slope or the second blow-out surface 70 only the first blowing direction G ₁ upward slope from the .

The air conditioner of the present invention is not limited to the configuration of the first embodiment described above, and the technical idea of the present invention shown in the configuration of the first embodiment is implemented in various other modes. Is possible.
For example, the air conditioner of the first embodiment is an air conditioner that combines heating and cooling, but it is naturally applicable even to a dedicated air conditioner. In the first embodiment, the indoor unit and the outdoor unit are separate types. However, the configuration can also be applied to an integrated air conditioner in which a compressor, a condenser, an evaporator, and the like are integrated. It is. Furthermore, in the present invention, the indoor unit is not specified as a wall-mounted type, and even in a floor-standing type or the like, the vertical wind direction changing blades at the air outlets can be modified by the same technical idea. Is possible.

  The air conditioner of the present invention is configured to prevent condensation during cooling operation and to blow out the air from the blowout port so as to reach a desired region, and to the air from the blowout port Since the high rectification effect can be exhibited, it is useful as an air conditioner used for business use and general households.

DESCRIPTION OF SYMBOLS 1 Indoor unit 2 Main body 2a Front opening part 2b Upper surface opening part 2c Outlet 3 Front panel 4 Filter 5 Heat exchanger 6 Fan 7 Rear guider 7a Guide surface 7b The most advanced 7c The most downstream end 7d The most upstream end 70 The 1st level | step difference blowing surface 71 Step 72 Second step blowing surface 8 Up / down wind direction changing blade 8a Lower blade (first blade)
8b Upper blade (second blade)
8c guide mini blade (third blade)
8aa Blowing surface 8ab Lower blade rotating portion 8ac Lower blade rotating shaft 8ad Blade portion 9 Left and right wind direction changing blade 10 Ventilation path 11 Stabilizer 12 Gap 13 Main body bearing portion 14 Lower blade holding portion 15 Groove

Claims (6)

A main body that has an air intake and an air outlet, and that configures the appearance,
A heat exchanger for exchanging heat from the air taken from the intake;
A fan for generating an air flow for exchanging heat in the heat exchanger and blowing out from the outlet;
A rear guider having a guide surface that is arranged downstream of the fan and guides the heat-exchanged air flow to the outlet, and rotates with a predetermined gap at the most downstream end of the guide surface of the rear guider. A blade that is provided and that controls the direction of the airflow flowing along the rear guider,
With
The rear guider is stepped difference at the most downstream end near the guide surface, the first stepped blowing surface which is formed on the upstream side of the step, a second step blowing surface, on the downstream side of the step,
An air conditioner configured such that an airflow in a blowing direction guided by the first step blowing surface and the second step blowing surface flows above the gap between the rear guider and the blade.   The air conditioner according to claim 1, wherein the first step blowing surface has a curved cross-sectional shape cut along the direction of the airflow. 2. The air conditioner according to claim 1 , wherein the second step blow-out surface has a curved cross-sectional shape cut along the direction of airflow. The air conditioner according to claim 1 or 3 , wherein a blowing direction of the air flow guided by the second step blowing surface is directed upward from a blowing direction of the air flow guided by the first step blowing surface. The blade has a blade rotation portion that houses a rotatable blade rotation shaft,
The main body has a blade holding portion that rotatably holds the blade rotation shaft of the blade, and a main body bearing portion in a portion facing the blade rotation portion,
The blade rotation shaft and the blade holding portion are formed of different materials,
The air conditioner according to any one of claims 1 to 4 , wherein the blade rotating portion and the main body bearing portion are formed of different materials. The air conditioner according to any one of claims 1 to 5 , further comprising a groove for holding dew on a facing surface that forms the gap between the rear guider and the blade.

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