JP6082674B2 - Air conditioner indoor unit - Google Patents

Description

  The present invention relates to an indoor unit of an air conditioner that is attached to a ceiling, and particularly to a winding structure for a grill that can be raised and lowered.

  As a background art in this technical field, there is JP 2000-16697 A (Patent Document 1). In this publication, “a motor for rotating the spool to wind the wire around the spool, a table for supporting the motor, and a distance between the two edges of the spool in the direction of the rotation axis of the spool are reciprocated. In a wire winding mechanism composed of an actuator for moving, a table that pushes the table in the reversing direction with a predetermined pressure smaller than the thrust in the moving direction immediately before the reversing position of the moving direction of the table to be reciprocated The pressing members are arranged on both sides along the moving direction of the table. "

JP 2000-16697 A

  The main type of the indoor unit of the commercial air conditioner is housed in the back of the ceiling. In this form, the indoor unit is suspended from the upper part of the ceiling. If the indoor unit is used for a long period of time, dust accumulates in the filter of the air suction port and the filter becomes clogged. Then, the ventilation resistance increases and the specified amount of air cannot be sucked. That is, since the air volume passing through the heat exchanger of the indoor unit is reduced, the air conditioning capability is reduced.

  Therefore, in order to eliminate clogging of the filter, it is necessary to periodically remove and clean or replace the filter. However, removal of the filter is a high place work on a stepladder, which is very dangerous and troublesome. . Therefore, in order to solve the difficulty, an indoor unit provided with an elevating mechanism capable of freely raising and lowering only a grill provided with a filter has been invented. This elevating mechanism includes a motor, a reel for winding a wire driven by the motor, a wire for elevating the grill, and a grill. The movement is such that the reel is rotated by a motor, the wire is taken up by the reel, and the grill connected to the wire is moved up and down.

  By the way, the number of the reels is, for example, that the grill is formed in a substantially square shape and is arranged so as to correspond to each of the four wires connected to the four corners of the grill. In many cases, a plurality of reels, such as one reel and a total of two reels, are arranged with respect to a wire connected to a point.

Here, problems when a plurality of reels are arranged in the lifting mechanism will be described.
First, consider a state where a reel is rotated by a motor and a wire is wound. In general, unless the reel is devised, the wire is not evenly wound on the reel. That is, it can be easily considered that there are temporal variations in the ascending (winding) speed and the descending speed even if the rotation of the motor is constant depending on the winding state of the wire. Therefore, when there are a plurality of reels in such a wire winding state, the ascending or descending speed of each reel varies, and the grille connected to the wire keeps its posture horizontal during ascending or descending. It does not sag and goes up and down at an incline, so it looks very bad and this is a problem.
Therefore, in order to solve the above problems, it is essential to wind the wire evenly on each reel, and there are the following conventional techniques.

  According to Patent Document 1, in a wire winding structure, the winding portion is reciprocated by an actuator, and buffer members are provided at both ends of the winding portion, so that the winding portion decelerates when the winding portion comes to both ends of the reciprocating motion. And a structure for evenly winding the wire is described. However, the method described in Patent Document 1 has a problem. In this case, an actuator for reciprocating the winding unit must be arranged, which increases the cost. Further, input energy for driving the actuator is necessary, which is disadvantageous from the viewpoint of energy saving in recent years.

Accordingly, the present invention provides a wire winding structure of a grill lifting mechanism having a plurality of reels provided in an indoor unit, eliminates variations in the amount of wire winding of each reel, reduces the tilt of the grill during lifting, and is substantially horizontal. The goal is to improve the appearance by maintaining this attitude.
Hereinafter, the grill provided with the lifting mechanism is referred to as a lifting grill.

  In order to solve the above-described problems, the present invention provides a “fan motor provided at the center upper portion of the indoor unit main body, a blower driven by the fan motor, and a heat exchanger disposed so as to surround the blower. An air conditioner indoor unit provided with a decorative panel provided on the lower surface of the main body of the indoor unit, and a filter for preventing dust from entering from an air suction port provided in the center of the decorative panel; A lift grill with the filter attached to the center of the decorative panel, a lift grill motor provided on the decorative panel in the vicinity of the lift grill, and a shaft of the lift grill motor, and rotates together with the shaft. A plurality of reels, and a wire that lifts and lowers the lifting grill by being wound or unwound by rotation of the reels, and the reel is inclined to the diameter of the winding portion. Only, it is configured to thicker toward the diameter at the other end from the one, when performing winding, concentrated first from a thin portion of the winding portion and said "to winding the wire.

  According to the present invention, in the wire winding structure of the grill lifting mechanism having a plurality of reels provided in the indoor unit, the wire winding amount of each reel is eliminated, the inclination of the grill when lifting is reduced, and the horizontal winding is substantially horizontal. By maintaining this attitude, you can improve the appearance.

Structural drawing of wire winding part of grill lifting mechanism showing Embodiment 1 of the present invention Air conditioner indoor unit internal structure diagram with a conventional grill lifting mechanism that suspends the main body from the ceiling Viewed from H in FIG. A view of the decorative panel from I in FIG. FIG. 4 is a perspective view of the grill of FIG. Enlarged view of part 4A FIG. 4A is an enlarged view corresponding to FIG. 1 showing Embodiment 2 of the present invention. FIG. 4A is an enlarged view corresponding to FIG. 1 showing Embodiment 3 of the present invention. FIG. 4A is an enlarged view corresponding to FIG. 1 showing Embodiment 4 of the present invention. FIG. 4A is an enlarged view corresponding to FIG. 1 showing Embodiment 5 of the present invention. 10B perspective view

  Embodiments of the present invention will be described below with reference to the drawings.

  Hereinafter, examples of the present invention will be described with reference to FIGS. The present embodiment relates to an air conditioner configured by connecting an indoor unit and an outdoor unit through a refrigerant pipe, and particularly relates to the structure of the indoor unit.

  FIG. 2 shows an internal structural diagram of an air conditioner indoor unit provided with a conventional grill lifting mechanism that suspends the main body from the ceiling, and FIG. 3 shows a view seen from H in FIG. FIG. 4 shows the decorative panel viewed from I in FIG. The structure of an indoor unit having four general outlets will be described with reference to FIGS. 2, 3, and 4. The indoor unit of the present embodiment includes a fan motor 44 provided at the upper center of the indoor unit main body 40, a fan 45 (blower) driven by the fan motor 44, and heat disposed so as to surround the fan 45. The exchanger 43, the decorative panel 21 provided on the lower surface of the main body 40 of the indoor unit, the filter 25 for preventing dust from entering from the air suction port 27 provided in the center of the decorative panel 21, and the center of the decorative panel 40 And an elevating grill 29 to which a filter 25 is attached.

  As the fan 45 rotates, air is sucked from the air suction port 27, and heat exchange between the air and the refrigerant flowing inside the heat exchanger 43 is performed. If it is a cooling operation, the air cooled by this heat exchange is blown out from the blower outlet 42a of FIG. 3, and indoor air conditioning is performed.

  The indoor unit includes a lift grill motor 1 provided on the decorative panel 21 in the vicinity of the lift grill 29, a plurality of reels 2 attached to the shaft of the lift grill motor 1 and rotating together with the shaft, And a wire 3 that lifts and lowers the lifting grill 29 by being wound or unwound by rotation. In this way, by controlling the rotation of the lifting grill motor 1, the wire 3 is wound around the winding portion of the reel 2 or unwound to freely control the lifting grill 29.

  Therefore, in the structure having a plurality of reels 2, the winding grill 29 is inclined when the lifting grill is raised due to a difference in winding speed due to variations in the locations where the wire 3 is large and small depending on how the wire 3 is wound. There is. If the plurality of reels 2 can wind the wire 3 in the same manner, there is no difference in the winding speed, so that the inclination when the elevating grill 29 is raised is eliminated.

  FIG. 5 is a perspective view of the grill of FIG. The wire 3 is bent at a portion 11 a of the crane 11 and is fixed at a portion 11 b of the crane 11 via a pulley 14. When the lift grill 29 is raised, the lift grill 29 is lifted by rotating the lift grill motor 1 and winding the wire 3 around the reel 2.

  For this reason, if the surface of the reel 2 is not flat or the like, the diameter of the plurality of reels 2 varies, or the center of gravity of the elevating grill 29 is shifted, the tension of the wires 3 applied to the plurality of reels 2 varies. The wire 3 is not evenly wound, and a deviation occurs between a portion where the wire 3 is wound more and a portion where the wire 3 is wound more. As a result, a portion where the wire 3 is wound a lot has a large diameter, and a small portion has a small diameter. Therefore, even if the motor 1 rotates at a constant rotational speed, the winding speed of the wire 3 changes due to the difference in the diameter of the winding portion.

  As shown in FIGS. 4 and 5, in the structure in which two motors 1 and two reels 2 are provided, the reel 3 has a difference in the winding speed of the wire 3, so that the lifting speed of the lifting grill 29 is increased and decreased. Depending on where the grille 29 is suspended, the elevating grille 29 is tilted and looks bad. However, if the diameters of the reels 2 are all the same, the above problem does not occur and this problem is solved.

  Therefore, in the same way as in the wire winding structure described in Patent Document 1, the wire 3 is wound around a designated portion of the reel 2, and the wire winding that can reduce the input energy and save energy and reduce the cost further than Patent Document 1. The structure will be described.

  FIG. 1 is a view for explaining the structure of a wire winding portion of a grill lifting mechanism showing Embodiment 1 of the present invention. FIG. 6 is a wire winding structure of a conventional grill lifting mechanism in which the portion A in FIG. Indicates. FIG. 1 is characterized in that the diameter of the reel 2 is proportionally changed toward one of the sides and the cylindrical shape is changed to a conical shape as compared with the conventional wire winding structure of FIG. In other words, the reel 2 of the present embodiment is configured such that the diameter of the winding portion is inclined and the diameter is increased from one end to the other end. The wire is concentrated and wound up. Thus, by winding the wire 3 from a portion having a small diameter of the reel 2, the difference in the winding speed of the wire 3 of the plurality of reels 2 is reduced, and the inclination of the lifting grill 29 when the lifting grill is raised is reduced. Is possible.

A second embodiment of the present invention will be described with reference to FIG. Description of points common to the first embodiment will be omitted.
FIG. 7 is a view for explaining the wire winding structure of the lifting grill of the indoor unit of the present embodiment. FIG. 7 is characterized in that the diameter of the center of the reel 2 is the thinnest and the diameter is increased in proportion to the both ends as compared with the conventional wire winding structure of FIG. That is, the reel 2 of the present embodiment is configured so that the diameter of the center of the winding portion is narrowed and inclined so as to have a diameter larger than the center toward both ends of the winding portion. The wire 3 is wound up from the narrow part of the take-up portion first. Thus, by winding the wire 3 from a portion having a small diameter of the reel 2, it is possible to reduce the difference in the winding speed of the wire 3 of the plurality of reels 2 and to reduce the inclination when the lifting grill 29 is raised. Is possible.

A third embodiment of the present invention will be described with reference to FIG. Description of points common to the first embodiment will be omitted.
FIG. 8 is a view for explaining the wire winding structure of the lifting grill of the indoor unit of this embodiment. FIG. 8 is characterized in that the reel 2 is thickened while a step of the diameter of the wire 3 is made toward one side of the diameter of the reel 2 as compared with the conventional wire winding structure of FIG. That is, the reel 2 of the present embodiment is configured so that the diameter of one of the winding portions is narrowed and the diameter is increased with a step toward the other side. The wire 3 is wound up in a concentrated manner from the thin part of the part. By winding the wire 3 from a portion having a small diameter of the reel 2, it is possible to reduce the difference in the winding speed of the wire 3 of the plurality of reels 2, and to reduce the inclination when the lifting grill 29 is raised.

A fourth embodiment of the present invention will be described with reference to FIG. Description of points common to the first embodiment will be omitted.
FIG. 9 is a view for explaining the wire winding structure of the lifting grill of the indoor unit of the present embodiment. FIG. 9 is characterized in that the width L of the reel 2 is narrower than that of the conventional wire winding structure of FIG. At that time, if the dimension L (the length of the winding portion of the reel 2) and the diameter φ of the wire 3 are set as shown in FIG. 9, the wire 3 can be wound up by setting L to about four times φ. Become even. By making it easy for the wire 3 to be wound evenly around the reel 2, it is possible to reduce the difference in the winding speed of the wire 3 of the plurality of reels 2 and to reduce the inclination of the grill 29 when the grill is raised.

A fifth embodiment of the present invention will be described with reference to FIGS. Description of points common to the first embodiment will be omitted.
FIG. 10 is a top view of the wire winding structure of the elevating grill of the indoor unit of this embodiment, and FIG. 11 is a perspective view of a portion B in FIG. As shown in FIG. 10, the wire winding structure of the lifting grill of the present embodiment is such that when the wire 3 is wound, the lifting / lowering grille motor 1 rotates in the direction of the arrow 90 so that the gear drive side 5 rotates. The gear transmission side 6 that meshes with the gear drive side 5 rotates in the direction of the arrow 91. As the gear transmission side 6 rotates in the direction of the arrow 91, the crankshaft 7 rotates. As shown in FIGS. 10 and 11, when the crankshaft 7 rotates in the direction of arrow 91, the connecting rod 8 moves and the wire guide 9 reciprocates as shown by arrow 92. Therefore, since the wire guide 9 guides the wire 3, the wire 3 is wound up while moving in front of the reel 2.

  Compared with the wire winding structure for the lift grill of the conventional ceiling-suspended air conditioner indoor unit of FIG. 6, in this embodiment, by providing this structure, the wire 3 is evenly wound on the reel 2, so the grill It is possible to reduce the inclination of the grill 29 at the time of ascent.

DESCRIPTION OF SYMBOLS 1 Lifting grill motor 2 Reel 3 Wire 4 Motor stay 4a Bearing 5 Gear drive side 6 Gear transmission side 7 Crankshaft 8 Connecting rod 9 Wire guide 10 Wire guide support 11 Crane 11a Wire bending part 11b Wire fixing part 12 Electric for lifting grill Box 13 Limit switch 14 Pulley 21 Makeup panel 22 Wind direction louver 23 Blowout guide 24 Packing 25 Filter 26 Corner panel 27 Suction port 28 Ceiling surface 29 Grill 30 Makeup panel mounting bolt 40 Housing 40a Top plate 41 Foaming case 42 Drain pan 42a Outlet 43 Heat Exchanger 44 Fan Motor 45 Blower 46 Electric Box 47 Elevating Case 90 Motor Rotation Direction 91 during Wire Winding 91 Crankshaft Rotation Direction During Wire Winding 92 Reciprocating Motion of Piston 93 Air Flow

Claims (3)

A fan motor provided at the upper center of the indoor unit body,
A blower driven by the fan motor;
A heat exchanger arranged to surround the blower;
The air conditioner indoor unit equipped with a decorative panel provided on the lower surface of the indoor unit Main body section,
A filter that prevents ingress of dust from the air inlet provided in the center of the decorative panel;
An elevating grill with the filter attached to the center of the decorative panel;
A lift grill motor provided on the decorative panel in the vicinity of the lift grill;
A plurality of reels attached to the shaft of the lift grill motor and rotating together with the shaft;
A wire that lifts and lowers the lifting grill by being wound or unwound by rotation of the reel,
The reel is configured such that one diameter of the winding portion is narrowed and the diameter is increased while making a step toward the other side, and when the winding is performed, the narrow portion of the winding portion An indoor unit for an air conditioner, wherein the wire is wound up in a concentrated manner. A fan motor provided at the upper center of the indoor unit body,
A blower driven by the fan motor;
A heat exchanger arranged to surround the blower;
The air conditioner indoor unit equipped with a decorative panel provided on the lower surface of the indoor unit Main body section,
A filter that prevents ingress of dust from the air inlet provided in the center of the decorative panel;
An elevating grill with the filter attached to the center of the decorative panel;
A lift grill motor provided on the decorative panel in the vicinity of the lift grill;
A plurality of reels attached to the shaft of the lift grill motor and rotating together with the shaft;
A wire that lifts and lowers the lifting grill by being wound or unwound by rotation of the reel,
The reel is configured such that the winding portion has a width approximately four times the diameter of the wire, and the wire is wound up. A fan motor provided at the upper center of the indoor unit body,
A blower driven by the fan motor;
A heat exchanger arranged to surround the blower;
The air conditioner indoor unit equipped with a decorative panel provided on the lower surface of the indoor unit Main body section,
A filter that prevents ingress of dust from the air inlet provided in the center of the decorative panel;
An elevating grill with the filter attached to the center of the decorative panel;
A lift grill motor provided on the decorative panel in the vicinity of the lift grill;
A plurality of reels attached to the shaft of the lift grill motor and rotating together with the shaft;
A wire for raising and lowering the elevating grill by being wound or unwound by rotation of the reel;
A gear drive attached to the shaft of the lifting grille motor;
A gear transmission for meshing with the gear drive and bending the rotational axis direction by 90 degrees;
A crankshaft as an axis of the gear transmission portion;
A wire guide connected by a crank portion of the crankshaft and a connecting rod ;
An indoor unit of an air conditioner , wherein the wire guide rewinds and moves evenly while guiding the wire to the reel when the lifting grill motor rotates .