JP2016035349A - Indoor equipment unit and air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an indoor equipment unit having a shaft part wind blocking structure of a cross flow fan which reduces the number of components and assembly work hours.SOLUTION: An indoor equipment unit includes: a housing; a base body 22 provided at the housing; a heat exchanger installed at the base body 22; a motor-driven cross flow fan which is rotatably supported by the base body 22, introduces air in a room, and sends air-conditioned air that has passed through the heat exchanger to the room; a motor 30 which is attached to the outer side of a side wall 22a of the base body 22 through a motor bracket 40, the motor 30 including an output shaft 31 passing through a shaft hole 22b provided on the side wall 22a connected with the cross flow fan; and a second flange part 45 serving as a contact part which is integrally provided with the motor bracket 40 and directly contacts with a surface of the side wall 22a located at the motor 30 side over an entire periphery so as to enclose the shaft hole 22b at a predetermined attachment position of the motor 30.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an indoor unit and an air conditioner, and more particularly to a shaft wind shielding structure of a cross flow fan in an indoor unit.

An air conditioner is a device that performs air conditioning (cooling, heating, and dehumidification) of an indoor space or the like, and generally includes an outdoor unit and an indoor unit as main components.
The indoor unit has a cross-flow fan driven by a motor in a housing in order to send out air-conditioned air that has been air-conditioned by passing air (fresh air) introduced from the room through a heat exchanger. The cross flow fan is rotatably supported by a base body provided in the casing of the indoor unit. A motor is attached to one side of the base body via a motor bracket, and the output shaft of the motor penetrates the side wall of the base body and is connected to the cross flow fan.

In such an air conditioner indoor unit, when fresh air that has not been dehumidified is attracted (bypassed) from the gap between the base of the housing and the motor bracket in the shaft portion of the crossflow fan during cooling operation, Fresh air is cooled inside the base body and condensation occurs on the crossflow fan.
In the conventional indoor unit, in order to prevent the above-mentioned attraction of fresh air, a windshield structure of the cross flow fan that blocks the gap by attaching a windshield component between the base and the motor bracket is adopted. Yes. In addition, as a conventional wind-shielding component, an elastic material such as foamed polystyrene is used, for example.

  Further, in Patent Document 1 below, the casing 5 and the motor cover 6 that house the motor 4 and the partition plate 7 are closely adhered and shielded by the insulations 12 and 13 attached to the cover component 11 and the like. It is described.

JP 2002-48355 A (paragraph [0011] etc.)

As described above, in an indoor unit of an air conditioner, in order to prevent condensation due to fresh air being drawn from the shaft portion of the crossflow fan during cooling operation, a windshield is formed in the gap between the base and the motor bracket. The shaft wind-shielding structure is used to attach the parts.
However, since the conventional shaft windbreak structure and the technology disclosed in Patent Document 1 are to attach a separate windshield component between the base and the motor bracket, the shaft windbreak structure has been improved. Therefore, it is desirable to reduce the number of parts and the number of assembly work steps.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an indoor unit unit having a cross-flow fan shaft portion wind-shielding structure that can reduce the number of parts and the number of assembling operations, and the indoor unit. It is providing the air conditioner provided with the machine unit.

In order to solve the above problems, the present invention employs the following means.
An indoor unit according to the present invention includes a housing, a base body provided in the housing, a heat exchanger installed in the base body, and a base body that is rotatably supported by the indoor body unit. A motor-driven cross-flow fan that introduces conditioned air that has been introduced and passed through the heat exchanger into the room, and a shaft hole that is attached to the outside of the side wall of the base body via a motor bracket and is provided in the side wall The motor is connected to the cross flow fan with an output shaft passing through the motor, and the motor bracket is provided integrally with the surface of the side wall on the motor side so as to surround the shaft hole at a predetermined mounting position of the motor. And an abutting portion that is in direct contact with the entire circumference.

According to the present invention, the contact portion that is provided integrally with the motor bracket and directly contacts the entire surface of the side wall on the motor side so as to surround the shaft hole at a predetermined mounting position of the motor. Thus, a contact portion integral with the motor bracket is in contact with the periphery of the shaft hole to form a seal portion that separates the cross flow fan side from the side wall and the motor side from the side wall. As a result, at the connecting portion between the cross flow fan and the motor, it is possible to prevent air that does not pass through the heat exchanger (fresh air) from being attracted to the cross flow fan through the shaft hole. And since the contact part is integrated with the motor bracket in the shaft part wind-shielding structure of such a crossflow fan, the number of parts and the work man-hour at the time of an assembly can be reduced.
The motor bracket described above may be a resin molded part having elasticity, such as polypropylene, for example, and the contact portion may be pressed against the surface of the side wall of the base body to form the seal portion.

  In the above invention, the contact portion may be a plate-like member that is in surface contact with the surface of the side wall.

  Thereby, the contact portion of the plate-like member makes surface contact with the entire circumference of the shaft hole to form a seal portion that separates the cross flow fan side from the side wall and the motor side from the side wall.

  In this case, the plate-like member may be formed by inclining the front end side as a free end in a direction approaching the cross flow fan.

  Thereby, the adhesiveness (sealability) with respect to the surface of the side wall of the base body can be further improved by elastically deforming the plate-like member and bringing it into surface contact.

  In the above invention, the contact portion may include one or a plurality of ring-shaped convex portions that contact the surface of the side wall.

  As a result, the ring-shaped convex portion of the contact portion makes line contact with the entire circumference of the shaft hole, thereby forming a seal portion that separates the cross flow fan side from the side wall and the motor side from the side wall. In this case, if a plurality of ring-shaped convex portions are provided, that is, if ring-shaped convex portions having different diameters are provided, a plurality of stages of seal portions can be formed, and the wind shielding performance can be improved.

  In the above invention, the abutting portion includes a plurality of ring-shaped convex portions that are in contact with the surface of the side wall, and stepwise from the distal end side to the base side with the protruding height of the ring-shaped convex portion as a free end. It may be increased.

  Thereby, since at least one ring-shaped convex part makes line contact with the surface of the side wall of the base body and comes into close contact therewith, good adhesion (sealability) can be obtained without tilting the contact part.

  In the above invention, a bracket-side cylindrical portion connected to the base portion of the contact portion and extending toward the motor side may be provided.

  As a result, the abutting portion and the bracket-side cylindrical portion are bent, so that when the abutting portion contacts the side wall surface, the abutting portion is located on the motor bracket side with the base of the abutting portion as a base point. The contact portion and the side wall surface can be brought into elastic contact with each other.

  In the above invention, a recess may be provided over the entire periphery of the connecting portion between the contact portion and the bracket side cylindrical portion, and a wind shield member may be provided in the recess.

  Thereby, since the sealing by the wind-shielding member arranged in the concave portion is also performed, it is possible to more reliably seal the flow of fresh air.

  An air conditioner according to the present invention includes the above-described indoor unit of the present invention, a compressor for compressing the refrigerant, and an outdoor heat exchanger for performing heat exchange between the refrigerant and outdoor air. An outdoor unit having a refrigerant pipe for connecting the indoor unit and the outdoor unit, and for circulating a refrigerant between the indoor unit and the outdoor unit. To do.

  According to the present invention as described above, the indoor unit has the above-described cross-flow fan shaft wind-shielding structure, so that the number of parts and the number of work steps during assembly are reduced by the contact portion integrated with the motor bracket. And it can prevent the attraction of fresh air.

  According to the indoor unit of the present invention described above, since the abutment portion integrated with the motor bracket is used in the shaft wind-shielding structure of the crossflow fan, the number of parts and assembly man-hours can be reduced and fresh air can be reduced. Can be reliably prevented. As a result, in the cross-flow fan, condensation due to the attracted fresh air can be reliably prevented, so that a remarkable effect can be obtained in improving the commerciality of the indoor unit and the air conditioner including the indoor unit.

It is a figure which shows one Embodiment of the indoor unit which concerns on this invention, and an air conditioner, (a) is a principal part expanded sectional view which shows the axial part wind-shielding structure of a crossflow fan, (b) is a contact part. It is a figure which shows the inclination to provide. It is a principal part expanded sectional view which shows the 1st modification which concerns on the axial part wind-shielding structure of the crossflow fan shown in FIG. It is a figure which shows the modification which concerns on the axial part wind-shielding structure of the crossflow fan shown in FIG. 1, (a) is a principal part expanded sectional view which shows a 2nd modification, (b) is the structure of a contact part. It is a figure which shows the 3rd modification different from a 2nd modification. It is a perspective view which shows the structural example of an air conditioner. It is a figure which shows the state which attached the motor to the base main body of the indoor unit. It is the disassembled perspective view seen from the base main body side of FIG. It is the disassembled perspective view seen from the motor side of FIG. It is sectional drawing which shows the structural example of the motor bracket provided with the contact part of Fig.1 (a). It is sectional drawing which shows the structural example of the motor bracket provided with the contact part of Fig.3 (a).

Hereinafter, an indoor unit and an air conditioner according to an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 4, an air conditioner 1 that performs air conditioning (cooling, heating, and dehumidification) of an indoor space or the like is a device that includes an outdoor unit 10 and an indoor unit 20 as main components. The outdoor unit 10 and the indoor unit 20 are connected by a refrigerant pipe 50 to form a closed circuit refrigerant flow path. The outdoor unit 10 and the indoor unit 20 are also connected by a power source and control wires (not shown).
In addition, the code | symbol 60 in a figure is a remote controller for driving | operation operation, and the various driving | running states of the air conditioner 1 are set by this.

The outdoor unit 10 includes a casing 12 having a substantially rectangular parallelepiped shape, a compressor 12 for compressing the refrigerant, an outdoor heat exchanger 13 for performing heat exchange between the refrigerant and outdoor air, And an outdoor fan 14 that promotes heat exchange between the refrigerant and the outdoor air in the outdoor heat exchanger 13. In addition, a four-way valve, an electronic expansion valve, a control unit, and the like (not shown) are also provided in the housing 11.
The outdoor heat exchanger 13 is a heat exchanger that functions as a condenser during the cooling operation and as an evaporator during the heating operation by operating the four-way valve to switch the circulation direction of the refrigerant.

  The indoor unit 20 includes a casing 21 that is a horizontally long, substantially rectangular parallelepiped shape. The casing 21 is attached to the base body 22, a front cover 23 attached to the base body 22 so as to cover the front portion of the base body 22 from the top, bottom, left and right, and the front surface. The front panel 24 is attached to the front panel 24.

  The indoor unit 20 includes fresh air taken in from a suction grill (suction port) 25 and a suction grill 25 provided in the front cover 23 in order to take air before air conditioning (hereinafter referred to as “fresh air”) from the room. The indoor heat exchanger 26 provided for cooling or heating the air is provided on the front panel 24 for returning the air heat-exchanged in the indoor heat exchanger 26 (hereinafter referred to as “conditioned air”) to the room. A fresh air is taken in from the blower outlet 27 and the suction grill 25, and a cross flow fan 28 provided for blowing air-conditioned air from the blower outlet 27 into the room is provided as a main component.

The indoor heat exchanger 26 and the cross flow fan 28 are supported by the base body 22 inside the housing 21.
Reference numeral 29 in the figure denotes a filter, which is provided to remove impurities such as dust and dirt contained in fresh air that passes through the suction grill 25 and is guided to the indoor heat exchanger 26. In addition, in order to adjust the blowing direction of air-conditioning air, the louver and flap which are not shown in figure are provided in the blower outlet 27. FIG.
The indoor heat exchanger 26 is a heat exchanger that functions as an evaporator during cooling operation and as a condenser during heating operation, depending on the refrigerant circulation direction.

  In the indoor unit 20 having the above-described configuration, the cross flow fan 28 using the motor 30 as a drive source is rotatably supported by the base body 22 constituting the casing 21 of the indoor unit 20. The cross flow fan 28 is disposed in an air flow path formed in the base body 22 so as to connect the suction grill 25 and the air outlet 27. And the connection part of the crossflow fan 28 and the motor 30 has the wind-shielding structure comprised as demonstrated below.

Below, based on FIG.1 and FIGS.5-8, the axial part wind-shielding structure to which the crossflow fan 28 and the motor 30 are connected is demonstrated in detail. The cross flow fan 28 is connected to the motor 30 at one side of the base body 22 (right side as viewed from the front in the illustrated example), but is installed in the base body 22 in FIGS. Illustration of the cross flow fan 28 is omitted.
The cross flow fan 28 is connected to the output shaft 31 of the motor 30 that passes through the shaft hole 22 b provided in the side wall 22 a of the base body 22.

The motor 30 is attached to the outer wall side of the side wall 22a via a motor bracket 40. The motor bracket 40 is a resin molded part having elasticity such as polypropylene. The motor bracket 40 has a substantially cylindrical shape in which an appropriate opening is provided on a wall surface that covers the periphery of the motor 30. For example, the motor bracket 40 can be divided into a left half side and a right half side with respect to the axial direction of the output shaft 31 of the motor 30. It has become.
On the other hand, on the side wall 22a of the base main body 22, a motor storage portion 22c having a substantially cylindrical shape protrudes so that the motor 30 stored in the motor bracket 40 is inserted and fixedly installed at a predetermined position. The motor housing portion 22c includes a small-diameter portion on the side wall 22a corresponding to one of the bearing portions provided at both axial ends of the motor 30, and a large-diameter portion expanded in diameter corresponding to the main body portion of the motor 30. And. The motor bracket 40 and the base body 22 are fixed using bolts (not shown).

An opening 41 for allowing the output shaft 31 to pass through is provided on one side wall surface of the motor bracket 40 on the cross flow fan 28 side. The opening 41 is provided with a first cylindrical portion 42 that protrudes outward in the axial direction of the output shaft 31 (in the direction of the side wall 22a) along the outer peripheral side end.
Furthermore, at the tip of the first cylindrical portion 42, a first ring portion 43 that is a substantially ring-shaped flat plate bent in the axial center direction of the output shaft 31, and the axial direction of the output shaft 31 from the first flange portion 43. A second cylindrical portion 44 that protrudes outward and a second collar portion 45 that is a substantially ring-shaped flat plate that is bent in the opposite direction (outward) to the axial center direction of the output shaft 31 are provided.

The second cylindrical portion 44 is a portion that protrudes in the axial direction of the output shaft 31 toward the side wall 22 a along the inner peripheral end of the first flange portion 43, and has an inner diameter through which at least the output shaft 31 of the motor 30 passes. Have dimensions.
The second flange 45 is a substantially plate-like portion formed outward from the tip of the second cylindrical portion 44, and in a state where the motor 30 is fixed at a predetermined position, It has a function of an abutting portion that blocks the periphery of the shaft hole 22b by directly contacting the entire surface of the side wall 22a so as to surround the shaft hole 22b.

  That is, the second flange 45 has an output of the motor 30 through which the cross flow fan 28 and the motor 30 attached to the outside of the side wall 22a of the base body 22 via the motor bracket 40 pass through the shaft hole 22b of the side wall 22a. In the shaft wind-shielding structure of the crossflow fan 28 connected by the shaft 31, the side wall 22a is contacted from the outside (motor 30 side) so as to surround the shaft hole 22b at a predetermined mounting position. This is a part that forms a seal portion that separates the cross flow fan 28 side and the motor 30 side, and is a member that is provided integrally with the motor bracket 40. In other words, the second flange 45 is a member that prevents the side of the cross flow fan 28 from communicating with the side wall 22a through the shaft hole 22b of the side wall 22a.

FIG. 1A is an enlarged cross-sectional view of a main part showing a state in which a seal portion is formed by attaching the motor 30 to a predetermined position in the shaft wind-shielding structure of the cross flow fan 28 described above.
In the state shown in the figure, the second flange portion 45 of the plate-shaped member is in contact with the surface of the side wall 22a on the motor 30 side of the base body 22 so as to surround the shaft hole 22b and to make a surface contact over the entire circumference. It has become. For this reason, the flow path of fresh air that communicates with the shaft hole 22b through the outside of the motor bracket 40 is blocked (closed) by the surface contact of the second flange 45 with the side wall 22a. The second flange 45 is a plate-like member formed of a resin having elasticity integrally with the motor bracket 40. Therefore, if the motor 30 is fixedly installed at a position where it is pressed against the surface of the side wall 22a of the base body 22. Further, good adhesion (sealability) can be obtained due to elasticity.

Further, as shown in FIG. 5, the motor 30 forms a seal portion by closely contacting the outer peripheral surface of the axial end portion of the motor 30 with the inner peripheral surface of the first cylindrical portion 42, and the seal portion is also fresh. Air flow is blocked.
Thus, the cross flow fan 28 side is separated from the side wall 22a of the base body 22 on which the cross flow fan 28 is installed, and the motor 30 side is separated from the side wall 22a by the two sealing portions, so that fresh air can be circulated. Blocked. As a result, it is possible to prevent fresh air from being attracted to the cross flow fan 28 through the shaft hole 22b at the connecting portion between the cross flow fan 28 and the motor 30, and therefore fresh air is attracted to the cross flow fan 28. It is also possible to prevent condensation. Further, since the second flange portion 45 of the contact portion described above is integrated with the motor bracket 40, not only the number of parts is reduced as compared with a separate conventional structure, but also the tension of the wind-shielding component is reduced. There is also an advantage that the number of work steps during assembly can be reduced because no additional work is required.

  Further, as shown in FIG. 1B, for example, the second flange 45 described above is inclined by a dimension S (about 1 mm) toward the side wall 22a at the tip end side (outer peripheral end) as a free end. It is desirable to be molded. This dimension S is effective for the resin-made second collar portion 45 to absorb the play (displacement) in the axial direction in a state where the motor 30 is attached and fixed at a predetermined position of the base body 22. That is, since the second flange 45 inclined by the dimension S is elastically deformed from the inclined state indicated by the imaginary line in the drawing like the second flange 45 ′ indicated by the solid line, the second flange 45 is more reliably adhered to the side wall 22a. Can be. Since the 2nd collar part 45 and the 2nd cylindrical part 44 become a bent shape, when the 2nd collar part 45 contacts the surface of the side wall 22a, it is 2nd on the basis of the base part of the 2nd collar part 45. The collar part 45 can be inclined to the motor bracket 40 side, and the second collar part 45 and the surface of the side wall 22a can be brought into elastic contact.

Further, as in the first modification shown in FIG. 2, a concave portion 46 is provided over the entire circumference at the connecting portion between the second flange portion 45 and the second cylindrical portion 44 serving as a contact portion, and the space of the concave portion 46 is filled. In this way, the wind shielding member 51 may be installed. As the wind shielding member 51 used here, an elastic material such as foamed polystyrene is desirable. In addition, about the front-end | tip part side of the 2nd collar part 45 used as a free end, it is good also as a shape which provided the inclination of the dimension S, as shown in FIG.1 (b).
With such a structure, in addition to the above-described surface contact sealing structure by the second flange 45, sealing is also performed by the wind shield member 51 disposed in the recess 46. It becomes possible to seal distribution more reliably.

3A and 9 is different from the above-described surface contact of the second flange 45, the contact portion of the second modification example has the tip of the ring-shaped convex portion 47 in line contact with the side wall 22a. To seal. That is, the second flange portion 45A of the second modification includes one or a plurality of ring-shaped convex portions 47 in contact with the surface of the side wall 22a on the surface facing the side wall 22a. The ring-shaped convex portion 47 is a circular projecting portion provided on the entire outer circumference side of the second cylindrical portion 44, and is arranged so as to draw a concentric circle when a plurality of the convex portions 47 are provided.
In addition, 45 A of 2nd collar parts of a 2nd modification become a structure substantially the same as the 2nd collar part 45 mentioned above except providing the ring-shaped convex part 47. As shown in FIG.

The second flange portion 45A having such a ring-shaped convex portion 47 is in line contact with the side wall 22a over the entire periphery of the vicinity of the tip portion of the ring-shaped convex portion 47 on the outer peripheral side of the shaft hole 22b. Since the seal portion that separates the cross flow fan 28 side from the side wall 22a and the motor 30 side from the side wall 22a is formed, the contact portion has the same sealing function as the second flange 45 of the surface contact.
If a plurality of ring-shaped convex portions 47 having the same protruding height and different diameters are provided, a plurality of stages of sealing portions can be formed, and the reliability of the sealing function can be increased.

Further, the second flange portion 45B of the third modified example shown in FIG. 3B is gradually increased from the distal end side to the base side with the protruding height of the ring-shaped convex portion 47 as a free end. In the illustrated configuration example, three ring-shaped convex portions 47 are provided concentrically, and the projecting height gradually increases from the ring-shaped convex portion 47a on the distal end side to the ring-shaped convex portion 47c on the base side. Yes.
For this reason, the plurality of ring-shaped convex portions 47 can obtain good sealing properties by at least one ring-shaped convex portion 47 being in close contact with the surface of the side wall 22a.

  As described above, according to the above-described embodiment and the modification thereof, the shaft portion wind-shielding structure of the cross flow fan 28 of the indoor unit 10 is provided on the base body 22 via the cross flow fan 28 and the motor bracket 40. The motor 30 attached to the outside of the side wall 22a is connected by the output shaft 31 of the motor 30 that passes through the shaft hole 22b provided in the side wall 22a, and the motor bracket 40 used here is a predetermined attachment position of the motor 30. Since the second flange portions 45, 45A and 45B integral with the motor bracket 40 are provided as contact portions that directly contact the entire surface of the side wall 22a on the motor 30 side so as to surround the shaft hole 22b. In addition, the number of parts and the number of assembling operations can be reduced and fresh air attraction from the shaft hole 22b can be reliably prevented.

As a result, in the cross flow fan 28, it is possible to reliably prevent the fresh air attracted during the cooling operation from being cooled and condensed, so that the condensed water droplets do not scatter into the room together with the conditioned air. Therefore, the above-described indoor unit 10 and the air conditioner 1 including the indoor unit 10 can improve the reliability and merchantability as well as reducing the number of parts and the number of assembly operations.
In addition, this invention is not limited to embodiment mentioned above, In the range which does not deviate from the summary, it can change suitably.

DESCRIPTION OF SYMBOLS 1 Air conditioner 10 Outdoor unit 11 11,21 Case 12 Compressor 13 Outdoor heat exchanger 14 Outdoor fan 20 Indoor unit 22 Base body 22a Side wall 22b Shaft hole 22c Motor storage part 23 Front cover 24 Front panel 25 Suction grill ( Suction port)
26 Indoor heat exchanger 27 Outlet 28 Cross flow fan 30 Motor 31 Output shaft 40 Motor bracket 41 Opening portion 42 First cylindrical portion 43 First flange portion 44 Second cylindrical portion 45, 45A, 45B Second flange portion 46 Concave portion 47 Ring-shaped convex part 51 Wind shielding member

Claims (8)

A housing,
A base body provided in the housing;
A heat exchanger installed in the base body;
A motor-driven cross-flow fan that is rotatably supported by the base body, introduces indoor air and passes the conditioned air that has passed through the heat exchanger, into the room;
A motor that is attached to the outside of the side wall of the base body via a motor bracket, and an output shaft that passes through a shaft hole provided in the side wall is coupled to the cross flow fan;
A contact portion that is provided integrally with the motor bracket and directly contacts the surface of the side wall of the base body on the motor side so as to surround the shaft hole at a predetermined mounting position of the motor; And an indoor unit.   The indoor unit according to claim 1, wherein the contact portion is a plate-like member that comes into surface contact with the surface of the side wall.   The indoor unit according to claim 2, wherein the plate-like member is formed by inclining a front end portion side as a free end in a direction approaching the cross flow fan.   The indoor unit according to claim 1, wherein the contact portion includes one or a plurality of ring-shaped convex portions that are in contact with the surface of the side wall. The contact portion includes a plurality of ring-shaped convex portions that contact the surface of the side wall,
The indoor unit according to claim 1, wherein the protrusion height of the ring-shaped convex portion is increased stepwise from the distal end side to the base side with the free end as a free end.   The indoor unit according to any one of claims 1 to 5, further comprising a bracket-side cylindrical portion that is connected to a base portion of the contact portion and extends toward the motor side.   The indoor unit according to claim 6, wherein a concave portion is provided over the entire periphery of the connecting portion between the contact portion and the bracket-side cylindrical portion, and a wind shielding member is provided in the concave portion. The indoor unit according to any one of claims 1 to 7,
An outdoor unit having a compressor for compressing the refrigerant, and an outdoor heat exchanger for performing heat exchange between the refrigerant and outdoor air;
An air conditioner comprising: a refrigerant pipe for connecting the indoor unit and the outdoor unit, and for circulating a refrigerant between the indoor unit and the outdoor unit.

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