JP2006057862A - Indoor unit for air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce intermittent abnormal sounds (surging) occurring when draft resistance increases by providing a protrusion on a rear guider of an indoor unit for an air conditioner wherein the rear guider is integrally molded with a machine frame. <P>SOLUTION: By leveling a top face 8a of the protrusion 8 provided on the rear guider 9, a mold can be horizontally removed when integrally molding the rear guider and the machine frame. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an indoor unit of an air conditioner used for air conditioning in a house or the like.

  Conventionally, an indoor unit of this type of air conditioner has been provided with a triangular prism-shaped wedge with its apex directed upstream in a ventilation path downstream of a cross flow fan formed by a rear casing and a stabilizer. The axial flow disturbance of the air flow blown by the flow fan can be suppressed, the air flow can be rectified to suppress the cluttering sound, and the air flow can be made smooth (see, for example, Patent Document 1).

FIG. 7 is a schematic cross-sectional view of a conventional indoor unit of an air conditioner described in Patent Document 1. As shown in FIG. 7, the cross flow fan 5 is disposed between a stabilizer 7 and a rear guider 9 constituting a casing, and an air outlet is formed by the stabilizer 7 and the rear guider 9 to constitute a blower circuit. And at least one end portion of the rear guider 9 is formed of a triangular prism-shaped wedge provided between the vicinity of the fan 5 and the outlet portion.
JP 2003-62234 A

  However, in the conventional configuration, the effect of the triangular prism can suppress the axial disturbance of the flow, rectify the air flow, suppress the cluttering sound, and smooth the air flow. Since the pillars run from the top to the bottom of the mouth, the ventilation resistance increases, and there is a problem that a mold cannot be formed when the main body and the rear guider are integrally formed.

  The present invention solves the above-described conventional problems, and provides an indoor unit for an air conditioner that can suppress surging while minimizing a decrease in blowing performance in an indoor unit integrally formed with a rear guider and a main body. The purpose is to do.

  In order to solve the above-described conventional problems, the indoor unit of the present invention is characterized in that a protrusion is provided at an arbitrary position of the outlet of the rear guider, and the top surface of the protrusion is horizontal. .

  As a result, in an indoor unit of an air conditioner equipped with a rear guider integrally formed with the underframe, the blowout speed is improved from the end portion to the central portion, or the central portion, thereby generating unstable airflow. Can prevent air flow disturbance, reduce intermittent abnormal noise (surging) that occurs when the ventilation resistance increases due to the accumulation of dust on the filter, and reduce the air blowing performance. It becomes possible to arrange projections that are minimized.

  The indoor unit of the present invention is an air conditioner indoor unit including a rear guider integrally formed with a frame, and it is surging from the end part to the center part or even in the center part with a minimum reduction in air blowing performance. Can be suppressed.

  The first invention improves the blowing speed by arranging a protrusion at an arbitrary position from the end of the outlet of the rear guider to the center, or at the center, and the top surface of the protrusion is horizontal. Prevents the generation of unstable air flow and suppresses air flow turbulence. In addition, intermittent abnormal noise (surging) that occurs when the ventilation resistance increases due to the accumulation of dust on the filter can be reduced.

  In the second aspect of the invention, in particular, the outer surface and the inner surface of the projection of the rear guider according to any one of the first to third aspects form an angle that is open from the upstream side to the downstream side. The direction of the flow is changed, and the blowing speed can be improved locally, and intermittent abnormal sounds (surging) can be reduced.

  In the third aspect of the invention, in particular, the apex upstream of the projection of the rear guider of the indoor unit of the first or second aspect of the invention is arranged at the center position of the partition plate of the cross flow fan in which turbulence is likely to occur. As a result, it is possible to effectively suppress the rustling noise and smooth the air flow.

  In the fourth aspect of the invention, in particular, the apex upstream of the projection of the rear guider of the indoor unit of the third aspect of the invention is arranged at the center of the second partition plate counted from the motor of the cross flow fan. In the air conditioner, the friction between the side plate and the blade is removed in order to tighten the screw for fixing the motor and cross flow fan in the vicinity of the side plate. The unstable flow generated there may propagate the instability in the axial direction. Therefore, the propagation of instability can be suppressed by arranging the protrusion of the present invention at the center position of the second partition plate.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is an external perspective view of an indoor unit according to the first embodiment of the present invention.

  In FIG. 1, the main body 1 includes a frame 2 and a front cover 3 attached to the front of the frame 2, and a suction grill 4 is provided on the frame 2 and the front cover 3.

  FIG. 2 is a schematic cross-sectional view of the indoor unit in the first embodiment of the present invention.

  In FIG. 2, the main body 1 is provided with a stabilizer 7, a rear guider 9, and a heat exchanger 6 so as to surround the entire area when viewed from the center of the fan 5.

  FIG. 3 is a schematic sectional view of the rear guider 9 of the indoor unit according to the first embodiment of the present invention.

  In FIG. 3, the rear guider 9 and the large frame 2 are integrally molded. Further, a protrusion 8 is arranged on the blowing path of the rear guider 9, and the top surface 8a of the protrusion 8 is horizontal. Arrows a and b indicate the moving direction of the mold.

  The operation and action of the air conditioner configured as described above will be described below.

  In the present embodiment, by arranging the protrusion 8 at an arbitrary position from the end of the outlet of the rear guider 9 to the center, the blowing speed is improved, and the generation of unstable airflow is prevented, It is possible to suppress turbulence of the air flow, and to reduce intermittent abnormal sound (surging) that occurs when the ventilation resistance increases due to the accumulation of dust on the filter. Further, since the top surface 8a of the protrusion 8 is horizontal, the number of parts can be reduced so that the mold can be pulled out horizontally even when the rear guider 9 and the large frame 2 are integrally formed.

(Embodiment 2)
FIG. 4 shows an enlarged cross-sectional perspective view of the main part near the rear guider 9 of the indoor unit according to the second embodiment of the present invention.

  In FIG. 4, the protrusion 8 disposed at the outlet of the rear guider 9 has an outer surface and an inner surface that form a corner that is open from upstream to downstream.

  The operation and action of the indoor unit configured as described above will be described below.

  In the present embodiment, the flow direction of the air flow from the upstream is changed, the blowing speed is locally improved, and intermittent abnormal noise (surging) can be reduced.

(Embodiment 3)
FIG. 5 shows an enlarged cross-sectional perspective view of the main part near the rear guider 9 of the indoor unit according to the third embodiment of the present invention.

  In FIG. 5, the vertex on the upstream side of the protrusion 8 is arranged at a position facing an arbitrary partitioning plate 5a of the crossflow fan 5 having a multiple structure.

  The operation and action of the indoor unit configured as described above will be described below.

  In the present embodiment, it is possible to suppress the disturbance in the axial direction of the flow, rectify the air flow, suppress the rustling noise, and effectively smooth the air flow.

(Embodiment 4)
FIG. 6 shows an enlarged cross-sectional perspective view of the main part in the vicinity of the rear guider 9 of the indoor unit according to the fourth embodiment of the present invention.

  In FIG. 6, the vertex on the upstream side of the protrusion 8 is arranged at a position facing the second continuous partition plate 5a from the end of the cross flow fan having the multiple structure on the side where the motor 10 is attached. .

  The operation and action of the indoor unit configured as described above will be described below.

  According to the present embodiment, in the vicinity of the side plate of the air conditioner, the friction with the side plate, and the flow that is likely to be generated by the blade removed to tighten the screw to fix the motor and the cross flow fan, etc. It is possible to effectively suppress the instability due to the disturbance from propagating in the axial direction.

  As described above, the indoor unit of an air conditioner according to the present invention can reduce intermittent abnormal noise (surging), and thus can be used not only for an air conditioner but also for any application using a crossflow fan. Applicable.

1 is an external perspective view of an indoor unit of an air conditioner according to Embodiment 1 of the present invention. Cross-sectional schematic diagram of the indoor unit of the air conditioner Schematic cross-sectional view of the rear guider formed integrally with the frame of the air conditioner The principal part expanded sectional perspective view near the rear guider of the indoor unit of the air conditioner in Embodiment 2 of this invention The principal part expanded sectional perspective view near the rear guider of the indoor unit of the air conditioner in Embodiment 3 of this invention The principal part expanded sectional perspective view of the rear guider vicinity of the indoor unit of the air conditioner in Embodiment 4 of this invention Schematic cross-sectional view of a conventional air conditioner indoor unit

Explanation of symbols

1 Air conditioner body 2 Underframe 3 Front cover 4 Suction grill 5 Fan (Cross flow fan)
5a Partition plate 6 Heat exchanger 7 Stabilizer 8 Protrusion 9 Rear guider

Claims (4)

An indoor unit of an air conditioner having a cross flow fan, a stabilizer, a heat exchanger, and a rear guider integrally formed with a frame inside the main body, and has a protrusion at an arbitrary position of the rear guider outlet. And the indoor unit of the air conditioner characterized by the top | upper surface of the protrusion being horizontal. The indoor unit of the air conditioner according to claim 1, wherein in the rear guider, an outer side surface and an inner side surface of the protrusion expand at an arbitrary angle from upstream to downstream. The indoor unit of an air conditioner according to claim 2, wherein, in the rear guider, an apex of an angle formed by the protrusion is located at a downstream portion of an arbitrary partition plate of the cross flow fan. The indoor unit of an air conditioner according to claim 3, wherein in the rear guider, an apex of an angle formed by the protrusion is located at a downstream portion of the second partition plate from the left end or the right end of the cross flow fan.

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