JPH05296479A - Indoor unit for air conditioning device - Google Patents

Abstract

PURPOSE:To make the noise smaller, and perform a blowing operation of a favorable efficiency by eliminating disorder such as a reversal flow, etc., which is generated between the upper part of an indoor blower and a back nose. CONSTITUTION:The title indoor unit for an air conditioning device is equipped with an indoor blower 2, a rear casing 7 which constitutes the rear part of the indoor unit, and a back nose 6 for which a stagnation area in the same direction with the rotational shaft of the indoor blower 2 is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner indoor unit, and more particularly to the structure of a rear casing.

[0002]

2. Description of the Related Art An indoor unit of a conventional air conditioner will be described with reference to FIGS.

FIG. 4 shows a structural diagram of an indoor unit of a wall-mounted heat pump air conditioner or an air conditioner exclusively used for cooling which is usually used. This indoor unit includes a front casing 29 at the front and a rear casing 27 at the rear, and an indoor blower 22 is provided in the interior thereof in the longitudinal direction. A suction port 24 for taking in indoor air into the indoor unit is provided in an upper portion and a front surface portion of the front casing 29, and a heat exchanger 21 is provided between the suction port 24 and the indoor blower 22. A blower outlet 25 is provided near the blower outlet 25 in parallel with the rotation axis of the indoor blower 22 and a blower outlet 25 that blows out the wind sucked from the suction inlet 24 located at a lower portion between the front casing 29 and the rear casing 27. It is composed of a louver 23 and is attached to a position near the ceiling such as on a window.

Next, the operation of the above configuration will be described. During cooling, as shown in FIG. 4, the louver 23 is set slightly downward from the horizontal direction, and the louver 23 is operated so as to blow out cool air. Even if the cold air from the wall-mounted air conditioner blows out near the horizontal, the cold air does not stay near the ceiling due to the buoyancy, but the warm air that is blown out horizontally during heating stays near the ceiling and the floor surface where the user is I can't heat nearby.

Therefore, in the case of operating with a high air volume for the purpose of initial rising and heating the entire room during heating, the angle of the louver 23 is set to about 45 ° with respect to the vertical downward direction (see FIG. 5). However, it is often uncomfortable for the user to be directly hit by the air flow blown out from the air conditioner, and in order to prevent this, the louver 23 is controlled so as to be vertically downward (see FIG. 6) and controlled to operate. To move the louver 23, a stepping motor (not shown) is usually used.

As the blower, an indoor blower 22 (also called a cross flow fan) is usually used as shown in FIG. The flow created by the indoor blower 22 is closely related to the shape of the fan such as the inflow and outflow angles of the fan, the shape of the fan itself such as the rotation speed and the radius, and the shape of the indoor unit such as the shape of the casing and the position of the heat exchanger 21. I have a relationship. In order to operate efficiently as an air conditioner, it is desirable to output as much air as possible and to operate it, and that noise, which is an important factor in user comfort, is the largest at high airflow. Therefore, the shape of the indoor unit is often designed in consideration of operating the indoor blower 22 with a high air volume. At that time, the set angle of the louver 23 is set close to the horizontal for the purpose of reducing the pressure loss as much as possible in relation to the setting at the time of actual operation. 7 and 8 show an example of the appearance of the flow field in the indoor unit when the louver 23 is set to be near horizontal and obliquely downward in the conventional indoor unit. Further, FIG. 9 shows an example of the aspect of the flow field in the indoor unit when the louver is vertically downward in the conventional indoor unit.

As shown in FIG. 9, in the air conditioner, when the air that is often set during the heating operation is blown out at an angle close to the vertical downward direction, the louver 23 near the outlet 25 in the suction area of the indoor blower 22. Becomes an obstacle, the airflow 30 does not flow smoothly, and turbulence such as backflow occurs near the back nose 26. As a result, the indoor blower 2
Since the suction passage of No. 2 becomes small and the pressure loss becomes large, the blown air volume is reduced by about 20% at the same rotation speed as compared with the case of blowing out near the horizontal direction as shown in FIG. There was a problem that heating could not be done up close.

[0008]

As described above, in the structure of the rear casing of the indoor unit of the conventional air conditioner,
When the louver is directed vertically downward, the air flow does not flow smoothly, and therefore, there is a drawback that turbulence such as backflow occurs near the back nose at the upper part of the indoor unit, and noise and air flow are reduced. Therefore, an object of the present invention is to eliminate the above-mentioned drawbacks and to eliminate noise and reduction in air flow rate.

[0009]

In order to achieve the above object, in an indoor unit of an air conditioner according to the present invention, an air communicating a suction port for sucking air in an air-conditioned space and a blowout port for blowing out the sucked air. Flow, a heat exchanger provided on the suction side of the air flow, an indoor blower provided on the downstream side of the heat exchanger, and the room provided on the upstream side of the indoor blower of the air flow. It is characterized by comprising a stagnation part for stagnation of a part of the wind supplied to the blower.

In order to achieve the above object, in the indoor unit of the air conditioner of the present invention, an indoor blower for blowing the air, and a suction port for sucking the wind by the indoor blower,
An outlet that blows out the air sucked from the inlet, a front casing that includes the inlet and the outlet, and a rear casing that constitutes a surface of the indoor blower on the opposite side to the front casing. At least a part of the protrusion protruding from the rear casing toward the front casing is provided with a back nose in which a recess is provided from the front casing toward the rear casing.

[0011]

In the device constructed as described above, since the back nose has a recess, it does not interfere with the suction by the indoor blower and causes backflow and other disturbances in the recess of the back nose to reduce noise and noise. It became possible to eliminate the decrease in air flow.

[0012]

Embodiments of the present invention will be described in detail with reference to FIGS.

FIG. 1 is a diagram showing the construction of an indoor unit of an air conditioner according to the present invention. In the figure, the outer shape of the indoor unit is composed of a front casing 9 provided in a front portion which is an indoor side and a rear casing 7 provided in a rear portion which is a wall side,
Air is sucked by the indoor blower 2 rotating from the suction port 4 provided in the upper part or the front part of the front casing 7, and at this time, the heat is passed by passing the indoor blower 2 and the heat exchanger 1 provided in the front casing 9. Will be exchanged. Then, the air sucked by the indoor blower 2 is blown out from the air outlet 5 provided in the lower part of the indoor unit. At this time, the direction of the airflow 10 blown out can be changed by the louver 3 provided at the air outlet 5. 2 and 3 show a rear casing 7 which constitutes a rear portion on the wall side of the indoor unit of the present invention.
FIG. 6 is a view showing an air flow path when a recess is formed in the back nose provided in the. FIG. 2 is a diagram showing a flow path of an air flow 10 in the indoor unit when the louver 3 is vertically downward in the indoor unit. In the figure, when the louver 3 is oriented vertically downward, the louver 3 becomes an obstacle near the air outlet 5, so that air does not flow smoothly inside the indoor unit and turbulence such as backflow occurs near the back nose 6 at the upper part of the indoor unit. Occur. Therefore, by generating a turbulence such as a backflow generated near the back nose 6 in the recess provided in the back nose 6, there is no turbulence such as a backflow between the indoor blower 2 and the back nose 6, and a smooth air flow is obtained. 10 flow paths can be realized. Further, since the backflow is generated in the recess provided in the back nose 6, the backflow becomes about the size of the recess provided in the back nose 6, so that the vortex of the backflow becomes smaller than that in the conventional indoor unit. And the noise was reduced and it became possible not to reduce the air flow. FIG. 3 is a diagram showing a flow path of the airflow 10 in the indoor unit when the louver 3 is directed obliquely downward in the indoor unit. In this case, since the louver 3 is substantially parallel to the flow path of the air flow 10 near the outlet, unlike the case where the louver is vertical, the air flows smoothly in the indoor unit without any problem. Even when the louver 3 is horizontal (not shown), the airflow 10 receives almost no resistance by the louver 3 as in the case of FIG. 3, so that the air flows smoothly in the indoor unit.

[0014]

As described above, according to the indoor unit of the air conditioner of the present invention, a back nose is formed by forming a recess in the back nose provided in the rear casing that constitutes the rear portion of the outer shape of the indoor unit. Is reduced, noise is reduced, and efficient ventilation can be realized.

[Brief description of drawings]

FIG. 1 is a diagram showing an indoor unit of an air conditioner according to the present invention.

FIG. 2 is a diagram showing an air flow path in the indoor unit of the air conditioner according to the present invention when the louver is vertically downward.

FIG. 3 is a diagram showing an air flow path in the indoor unit of the air conditioner according to the present invention when the louver is directed obliquely downward.

FIG. 4 is a diagram showing an indoor unit of a conventional air conditioner.

FIG. 5 is a diagram showing an indoor unit of a conventional air conditioner.

FIG. 6 is a view showing an indoor unit of a conventional air conditioner.

FIG. 7 is a view showing an air flow path in the indoor unit of the conventional air conditioner when the louver is horizontal.

FIG. 8 is a view showing an air flow path in the indoor unit of the conventional air conditioner when the louver is directed obliquely downward.

FIG. 9 is a view showing an air flow path in the indoor unit of the conventional air conditioner when the louver is vertically downward.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Heat exchanger, 2 ... Indoor blower, 3 ... Louver, 4 ... Suction port, 5 ... Outlet port, 6 ... Back nose, 7 ... Rear casing, 9 ... Front casing, 10 ... Air flow.

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[Procedure amendment]

[Submission date] May 22, 1992

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 1]

[Fig. 2]

[Figure 3]

[Figure 4]

[Figure 5]

[Figure 6]

[Figure 7]

[Figure 8]

[Figure 9]

Claims (2)

[Claims] 1. An air flow communicating between a suction port for sucking air in an air-conditioned space and an outlet for blowing the sucked air; a heat exchanger provided on the suction port side of the air flow; An indoor blower provided on the downstream side of the exchanger, and a stagnation part for stagnation of a part of the air supplied to the indoor blower provided on the upstream side of the indoor blower of the air flow. An indoor unit of a characteristic air conditioner. 2. An indoor blower for blowing wind, a suction port for sucking the wind by the indoor blower, a blowout port for blowing out the wind sucked from the suction port, the suction port, and the blowout port A front casing, in the indoor blower, a rear casing forming a surface on the opposite side to the front casing side, and at least a part of the protrusion protruding from the rear casing in the front casing direction, on the rear casing, An air conditioner comprising a front nose and a back nose provided with a recess in the rear casing direction.