JP3635827B2 - Air conditioner indoor unit - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cross flow blower type blower circuit and configuration used for an air conditioner and the like.
[0002]
[Prior art]
A conventional cross-flow blower type air conditioner has a configuration as shown in FIG. 6 as described in JP-A-8-61685. An air passage 3 is formed between the suction port 1 and the air outlet 2, and the air passage 3 can be moved to the ceiling of the underframe 5 along the inner surface of the front cover 4. A detachable air filter 6, a heat exchanger 7, a fan 8, a rear guider 9 disposed on the back of the fan 8, and a stabilizer 10 disposed below the fan 8 are disposed therein. The air is sent to the air outlet 2 by the fan 8 and the air direction into the room is adjusted by the wind speed blades 11. The stabilizer 10 and the rear guider 9 are drain pans that receive dehumidified water falling from the respective heat exchangers 7, and at the same time, walls that constitute a part of the air passage 3.
[0003]
At the front end portion 12 of the stabilizer, a protruding end 13 is disposed on the side facing the fan 8, and a suction flow guide point 14 extending in the rotational direction of the fan 8 is disposed on the side facing the heat exchanger 7. The tip 13 is a point where the distance between the stabilizer 10 and the fan 8 is the shortest. The fan 8 side of the stabilizer tip 12 gradually expands the air flow path from the tip 13 toward the tip 14, and on the heat exchanger side, the air gradually moves from the shortest distance point to the heat exchanger toward the tip. The flow path is enlarged.
[0004]
The operation of the indoor unit of the air conditioner configured as described above will be described below. When the fan 8 is driven, in addition to the main air flow that flows in from the suction port 1 of the front cover 4 and is discharged from the blow-out port 2, a leakage flow occurs in the rotational direction of the fan 8 at the tip 12 of the stabilizer. The leaked flow again flows into the fan 8 and the flow into the heat exchanger 7 collide with the suction flow above the tip 14.
[0005]
Further, as described in JP-A-7-190403, according to FIG. 7, a water tray 15 for performing dehumidifying water treatment on the back side is provided at the suction side tip of the rear guider 9, and the water tray A substantially semicylindrical round 17 is disposed on the fan 8 side of the flange 16 at the tip of 15.
[0006]
[Problems to be solved by the invention]
However, although the cross flow blower having the above-described configuration allows the suction flow to smoothly flow at the stabilizer tip 12, noise due to interference with the fan 8 is likely to occur because the entire stabilizer tip 12 approaches the fan 8. In addition, there is a problem that the collision at the time when the leakage flow and the air flowing in from the heat exchanger 7 merge becomes intense and the flow rate performance is deteriorated.
[0007]
Moreover, if the radius of the tip 13 at the shortest distance point from the fan 8 is large, there is a problem that a leakage flow is likely to occur and the flow rate performance is deteriorated.
[0008]
Further, if a substantially semi-circular round R 17 is provided on the suction side of the rear guider 9 on the suction side, the suction flow at the front end is smooth, but a convex portion is formed on the side of the flange 16 on the fan 8 side. The occurrence of some dead water area under the half cylinder 17 is inevitable. Further, when the water receiving tray 15 is formed, sinking occurs if an attempt is made to form a large substantially semi-column 17. Therefore, if the flange 16 on the heat exchanger side is made thin along the substantially semicircular cylinder 17, the inflow air from the heat exchanger 7 does not flow smoothly on the back surface of the flange 16, so that the flow rate performance is lowered.
[0009]
The present invention solves the above-mentioned conventional problems, and improves the flow rate performance by improving the shape of the tip of the stabilizer, and at the tip of the suction part of the rear guider improves the flow rate performance and reduces noise. The purpose is to plan.
[0010]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention is provided with a first protruding end in which the stabilizer extends in the rotation direction of the cross flow fan and has the shortest distance from the cross flow fan. and having a second tip taking the distance between the cross flow fan greater than the shortest distance to the tip of the rotational direction of the flow fan in this first tip and the same shape, the heat exchanger the front side of the cross flow fan The flange of the water receiving tray that is disposed on the back side and that performs the dehumidifying water treatment of the heat exchanger disposed on the back side is curved facing the cross flow fan and gradually cross-section from the tip downward It is characterized by being formed to increase the thickness .
[0011]
DETAILED DESCRIPTION OF THE INVENTION
According to a first aspect of the present invention, the stabilizer includes a first protruding end that extends in a rotation direction of the cross flow fan and has a shortest distance from the cross flow fan, and the cross flow fan starts from the first protruding end. of the tip portion of the rotating direction of the distance between the cross flow fan in this first tip having the same shape as it has a second tip made larger than the shortest distance, if this configuration, a heat exchanger in the stabilizer tip The suction flow can be made smooth, and since the entire tip does not approach the fan, the interference noise can be suppressed .
[0012]
The heat exchanger is disposed on the front side and the back side of the cross flow fan, and the flange of the water tray for dehumidifying water treatment of the heat exchanger disposed on the back side is curved facing the cross flow fan. It is characterized by being formed so as to gradually increase the cross-sectional thickness from the tip toward the bottom.
[0013]
As a result, in order to treat the dehumidified water with certainty, the brim requires a certain length. On the other hand, the flow coming from the rear heat exchanger collides with the brim by giving the brim the length. Disturbed smooth inflow. However, by forming the brim in a curved shape facing the cross flow fan and gradually increasing the cross-sectional thickness from the tip downward, the air flowing in from the heat exchanger arranged on the back side can be reduced. Collision with the flange is mitigated, the suction flow from the back side heat exchanger can be smoothed, and the suction flow is smooth even at the tip of the water tray, so that a dead water area is also generated on the fan side. Whilst inflow to the fan side in which it can be improved flow performance from becoming smooth.
[0014]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0015]
FIG. 1 is a transverse sectional view of a first embodiment of the present invention, and FIG. 2 is an external perspective view of the same. The general flow and configuration will be described. A removable air filter 6 is provided along the inner surface of the front cover 4 by sucking room air from the suction port 1 provided in the front cover 4 and the main body frame 5. Is further sucked into the fan 8 after passing through the heat exchanger 7. Further, the air sucked into the fan 8 passes through the air passage 3 formed by the rear guider 9 disposed on the back surface of the fan 8 and the stabilizer 10 disposed below the fan guide 8 and is discharged from the outlet 2. The blowout port 2 has wind speed blades 11 and can adjust the wind direction. The shortest distance between the stabilizer and the fan is the first protrusion 13, and the distance between the first protrusion 13 and the fan 8 is the same shape as the first protrusion 13 from the first protrusion 13 to the tip of the cross flow fan in the rotational direction. A second protrusion 18 that is larger than the shortest distance is provided, and the second protrusion 18 has a greater distance from the fan 8 than the first protrusion 13, so that interference noise with the fan can be suppressed as much as possible.
[0016]
FIG. 3 is a cross-sectional view of the stabilizer of the second embodiment of the present invention. The same components as those shown in FIG. In FIG. 3, the fan diameter is φ = 86 mm, and the tip 13 at the shortest distance point from the fan 8 is convex to the fan side, and R = 0.1 mm. With this configuration, the leakage flow of the stabilizer 10 flows smoothly to the fan 8. Molding is impossible at R <0.1 mm. FIG. 4 shows the relationship between the R / r ratio and the flow rate performance, where r is the fan diameter and R is the radius of the tip 13 closest to the fan. When R / r> 5.82 × 10 −3, the flow tends to flow along the tip 13 and a large amount of leakage flow occurs, so the flow rate performance is significantly deteriorated.
[0017]
FIG. 5 is a cross-sectional view of a third embodiment of the present invention. The same components as those shown in FIG. The tip of the suction portion of the rear guider 9 also functions as a flange 16 of a water tray 15 that receives dehumidified water falling from the rear heat exchanger 7a. When the heat exchanger 7a is arranged on the back side, it is desirable that there is no obstacle between the back side heat exchanger 7a and the fan 8 in order to secure the suction flow rate from the back side heat exchanger 7a. In order to treat the dehumidified water more reliably, the brim 16 needs a certain length. By providing the flange 16 with a length, the flow entering from the rear heat exchanger 7a collides with the flange 16 to prevent smooth inflow. However, as shown in FIG. 3, the cross-sectional thickness gradually decreases from the tip of the flange 16 downward. By increasing the height, the collision can be mitigated, and no dead water area can be generated on the fan 8 side, and the inflow can be smoothed, so that the flow rate performance can be improved. The maximum thickness t of the brim is about t = 3 mm which does not cause sink marks when molded with a mold.
[0018]
【The invention's effect】
As is apparent from the above description, according to the present invention, the stabilizer extends in the rotational direction of the cross flow fan, and the first protrusion that has the shortest distance from the cross flow fan. It was provided, but having a second tip made larger than the first distance shortest distance between the cross flow fan projecting from the tip of the rotational direction of the cross flow fan in this first tip and the same shape, Since the inflow of air from the heat exchanger becomes smooth and the leakage of air can be prevented, the flow rate performance is improved, and the interference sound with the fan can be suppressed, so that a low-noise air conditioner can be provided .
[0019]
The heat exchanger is disposed on the front side and the back side of the cross flow fan, and the flange of the water tray for dehumidifying water treatment of the heat exchanger disposed on the back side is curved facing the cross flow fan. It is characterized by being formed so as to gradually increase the cross-sectional thickness from the tip toward the bottom.
[0020]
Thereby , since the air flow from the heat exchanger arrange | positioned at the back side can be made smooth, the improvement of flow performance is achieved.
[Brief description of the drawings]
1A is a cross-sectional view of an indoor unit of an air conditioner according to a first embodiment of the present invention. FIG. 1B is an enlarged cross-sectional view of the vicinity of a stabilizer according to the first embodiment. [FIG. 3] (a) Cross-sectional view of an indoor unit of an air conditioner according to a second embodiment of the present invention. (B) FIG. 3B is a perspective view of the air conditioner according to the second embodiment. FIG. 4 is an enlarged cross-sectional view of the vicinity of the stabilizer. FIG. 4 is a diagram showing the relationship between the fan diameter of the present invention, the radius ratio of the tip of the stabilizer, and the flow rate performance. Cross-sectional view of the unit (b) Enlarged cross-sectional view of the vicinity of the water pan of the third embodiment [FIG. 6] (a) Cross-sectional view of the indoor unit of the air conditioner of the prior art (b) Enlarged cross-section of the main part [Fig. 7] (a) Cross-sectional view of indoor unit of prior art air conditioner (b) Enlarged cross-sectional view of relevant parts Description]
DESCRIPTION OF SYMBOLS 1 Intake port 2 Outlet 3 Air supply path 4 Front cover 5 Main body frame 6 Air filter 7 Heat exchanger 8 Fan 9 Rear guider 10 Stabilizer 11 Wind speed blade 12 Stabilizer tip 13 The first tip of the shortest distance between the stabilizer and the fan 14 Point of the shortest distance between the stabilizer and the heat exchanger 15 Water pan 16 Hook of the water pan 17 Rough of a semi-cylindrical tip of the brim tip 18 Second tip of the stabilizer tip

Claims (1)

A cross flow fan formed by combining a main body frame, a single impeller in which a plurality of blades having a certain length are arranged in a columnar shape in the rotation axis direction, and a stabilizer positioned close to and opposed to the cross flow fan; And a rear guider that forms a flow path, a front cover, and a heat exchanger, and the stabilizer extends in the rotational direction of the crossflow fan and has a first protrusion that has the shortest distance from the crossflow fan. provided to, and having a second tip made larger than the first distance shortest distance between the cross flow fan to the tip of the rotational direction of the cross flow fan from projecting in the first tip and the same shape, the the heat exchanger is disposed on the rear side and front side of the cross flow fan, the flange of the water receiving tray to the dehumidification water treatment arranged heat exchanger on the rear side, the click Scan flow fans oppositely curved, and the indoor unit of an air conditioner which is characterized in that it is formed to increase gradually cross-sectional thickness from the tip downward.

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