JP4194925B2 - Air conditioner - Google Patents

Description

  The present invention relates to an air conditioner that is a ceiling-suspended indoor unit, for example, which has an improved bearing structure for a rotating shaft of a fan motor constituting a blower.

In an air conditioner composed of an indoor unit and an outdoor unit, the ceiling does not protrude from the wall surface, unlike a so-called wall-mounted indoor unit, and is attached in close contact with the ceiling board so that it does not feel a sense of pressure. An air conditioner equipped with a suspended indoor unit is often used.
While this type of indoor unit is required to reduce the size in the thickness direction (height direction) of the unit main body, which is the housing, as much as possible and to have a shape with less pressure, the width direction (horizontal direction) ) Has relatively few dimensional constraints. Therefore, the efficiency of the heat exchange action is improved by blowing out heat exchange air from a wide range along the ceiling surface.

As the blower used here, it is preferable to adopt a multi-blade fan that can widen the blowout range of the heat exchange air and that requires a smaller fan diameter. This multiblade fan has a configuration in which blades are arranged in an annular shape, and has a characteristic of sucking air from the axial direction and blowing it out in the circumferential direction.
However, if this type of multi-blade fan is formed as a single unit and elongated in the axial direction, the blown-out air volume is partially biased along the axial direction. Therefore, a plurality of multi-blade fans having the same fan diameter and a relatively short axial length are connected to the rotating shaft at a predetermined interval, and these are driven by a single fan motor for air blowing action. It is a normal configuration to perform.

[Patent Publication 1] uses a so-called biaxial motor in which a rotating shaft protrudes from both side surfaces, and attaches one air blowing unit to one rotating shaft and arranges a plurality of air blowing units on the other rotating shaft. A configuration is disclosed.
JP-A-11-101462

In the above-mentioned [Patent Document 1], one rotating shaft that supports one blower unit has a relatively short axial length, and thus is not supported by any shaft upper heat insulating material, and is cantilevered. On the other hand, the other rotating shaft is relatively long to mount a plurality of blower units, and cannot be cantilevered in strength.
Therefore, the tip of the rotating shaft is rotatably supported by a bearing. This bearing is inserted into the concave bearing holding member formed by burring from the outside of the side plate against the sheet metal side plate of the air conditioner body, and is held by fixing the cover using screws. The Another feature is that the bearing support bracket is not required and the cost is reduced.

By the way, the substantial axial length of the rotating shaft to which a plurality of blower units are attached is from the side surface of the fan motor to the side plate of the air conditioner body, and the axial length of the rotating shaft is the rotational shaft diameter. It becomes extremely long in comparison. For this reason, even if the number of rotations is increased to some extent, the rotating shaft is in a condition where bending deformation and vibration are likely to occur.
In order to suppress these problems as much as possible, it is necessary to obtain centering of the rotating shaft with extremely high accuracy. However, the bearing that supports the tip of the rotating shaft is supported by a bearing holding member that is provided on the side plate of the main body by burring from the outside, and it is difficult to obtain the position of the bearing holding member with high accuracy. It is.
In addition, it is certain that a separate bearing bracket is not required, but instead, a dedicated bearing and cover must be manufactured separately, and a louvering process for the side plate of the main body is also required, which is not necessarily costly. There is a possibility that it does not lead to reduction.

  The present invention has been made paying attention to the above circumstances, and the object of the present invention is to support the rotating shaft with a bearing when the rotating shaft of the fan motor constituting the blower is long. As a premise, we will provide an air conditioner that ensures mounting and fixing to bearings, prevents the occurrence of bending due to the rotation of the rotating shaft, provides high centering accuracy, and improves assembly workability. To do.

  The present invention has been made to satisfy the above-mentioned object, and the unit main body is partitioned into a heat exchange chamber for accommodating a heat exchanger and a blower chamber for accommodating a blower by a partition plate. In the fan motor, the rotating shaft is pivotally supported by a bearing member, and the bearing member is supported and fixed to the bearing fixing base. A leg plate portion that is bent along the edge, a locking piece that is integrally extended from the leg plate portion and locked to the partition plate, and a unit body that is bent along the edge of the leg plate portion. And a fixed piece that is fixedly attached to.

  According to the present invention, even if the rotating shaft of the fan motor constituting the blower is long, the occurrence of bending deformation accompanying the rotation of the rotating shaft is prevented, the centering accuracy is improved, and the assembly workability is improved. There is an effect that can be achieved.

Hereinafter, an air-conditioning apparatus according to an embodiment of the present invention will be described with reference to the drawings.
1 is an overall perspective view of an indoor unit constituting the air conditioner, FIG. 2 is a sectional view of the indoor unit, FIG. 3 is a bottom view showing the internal structure of the indoor unit, FIG. 4 is a perspective view of a bearing fixing base, and FIG. FIG. 6 is a cross-sectional view of a state in which a bearing fixing base is attached, and FIG. 6 is a perspective view of a state in which a bearing tool is attached to the bearing fixing base.

In the figure, reference numeral 1 denotes a unit main body, which is attached to a ceiling bolt that is hung from a ceiling bolt (not shown) and in close proximity to the ceiling surface. One feature of the unit main body 1 is that the dimension in the width direction (horizontal direction) is extremely large compared to the dimension in the thickness direction (height direction).
The unit main body 1 includes a bottom plate portion 1a constituting the lower surface, a top plate portion 1b constituting the upper surface close to the ceiling in a suspended state, and a pair of left and right connecting the bottom plate portion 1a and the top plate portion 1b. It is comprised from the side-plate part 1c and the back surface part 1d. Only the side plate portion 1c is covered with the side cover 1e.

The bottom plate portion 1a is provided with a suction port 2 in which a grille 10 and a filter 11 are detachably fitted along the width direction at a position approximately half of the front-rear direction perpendicular to the width direction of the bottom plate portion 1a.
In addition, the front surface portion opposite to the back surface portion 1d of the unit main body 1 is a blowout port 3 to which a horizontal louver 13 is attached so as to be openable and closable. A louver 12 is rotatably attached.

  A partition plate 6 is provided inside the unit body 1. The partition plate 6 is erected along one side edge of the suction port 2 into which the grill 10 described above is fitted, and extends so as to contact the top plate portion 1 b of the unit body 1. Further, the partition plate 6 extends so as to contact the left and right side plate portions 1c constituting the unit main body 1, so that the inside of the unit main body 1 is partitioned into two chambers A and B by the partition plate 6 in the front-rear direction. become.

The inside of the unit body 1 has a blower chamber A in which a later-described blower S and an electric component box 9 for driving and controlling the blower S are arranged and housed on the suction port 2 side with a partition plate 6 interposed therebetween, and a blower outlet 3 side. A heat exchange chamber B in which the heat exchanger 5 is accommodated is formed.
The heat exchange chamber B will be further described. The indoor heat exchanger 5 and a drain receiver 7 are accommodated in the lower portion of the indoor heat exchanger 5. The indoor heat exchanger 5 is formed in a slanted state so that the unit body 1 is formed with a reduced vertical dimension as much as possible.

The drain receiver 7 is formed of, for example, a thick synthetic resin material, and receives heat from the slanted indoor heat exchanger 5 so as to receive all the drain water droplets that are generated and dripped in the refrigeration cycle operation. It is formed in an area that occupies almost the entire bottom surface of the exchange chamber B.
A drain pump is attached to the drain receiver 7, and drain water collected in the drain receiver 7 is discharged through a drain hose (both not shown) connected to the drain receiver 7.
An upper heat insulating material 30 that supports the upper end of the indoor heat exchanger 5 is provided above the heat exchange chamber B, and the heat generated by the refrigeration cycle of the indoor heat exchanger 5 (warm / cold) is unit body. As with the drain receiver 7, it is formed thick so that it is not transmitted to the plate material forming 1.

Below, the air blower S arrange | positioned in the said ventilation chamber A is demonstrated.
The blower S includes a fan motor 17 that is a so-called biaxial motor in which the rotary shafts 16a and 16b protrude from both side surfaces. Note that a connecting shaft 16c is connected to one rotating shaft 16b via a coupling (not shown) to form an integrated straight long rotating shaft. Hereinafter, this is simply referred to as a rotating shaft 16b.

  The blower device S includes a blower fan 4 fitted to the respective rotary shafts 16 a and 16 b of the fan motor 17 and a fan case 14 that surrounds the blower fan 4 except in the axial direction. While the number of the fan motors 17 is one, a plurality of blower fans 4 and fan cases 14 are provided. The blower fan 4 uses a so-called multi-blade fan, and is of a type that blows air sucked in from the axial direction in the circumferential direction as it rotates.

  In particular, as shown in FIG. 3, the fan motor 17 is arranged at a position shifted in one direction from the longitudinal center of the unit main body 1, and one blower fan 4 is provided on a short rotating shaft 16 a protruding from one side surface. Is installed. A plurality of (three in this case) blower fans 4 are attached to the long rotating shaft 16b protruding from the other side surface of the fan motor 17 with a predetermined interval.

In particular, as shown in FIG. 2, the fan case 14 is divided into upper and lower parts and combined. Both side surfaces of the fan case 14 are provided with openings through which the rotary shafts 16 a and 16 b penetrate and both side surfaces of the blower fan 4 are exposed, and form a suction port body n of the blower fan 4.
A blow-out port body m, which is an opening having a rectangular cross section, is integrally provided on the peripheral surface of the fan case 14, and the tip of the blow-out port body m is an opening having the same shape provided in the partition plate 6. And project to the heat exchange chamber B side. Accordingly, air is sucked from the suction port body n as the blower fan 4 rotates, and blown from the blowout port body m.

In other words, the blower fan 4 sucks air in the blower chamber A in which the blower S is disposed, and the lower surface of the blower chamber A is provided with the suction port 2 into which the grill 10 is fitted. Eventually, the air in the air-conditioned room is sucked into the blower chamber A through the suction port 2 and further sucked into the blower fan 4.
The heat exchange air is blown out from the blowout outlet body m along with the rotation of the blower fan 4, but the blowout mouthpiece m projects from the partition plate 6 to the heat exchange chamber B, and is blown out into the heat exchange chamber B. Since a plurality of the air blowing cases 14 are arranged at predetermined intervals, the air blowing cases 14 are in a substantially uniform state and are uniformly guided to the indoor heat exchanger 5.

The fan motor 17 is attached to the top plate portion 1 b constituting the unit main body 1 via a motor support 19. Therefore, the motor support 19 is actually attached in a suspended state from the top plate portion 1b. A part of the long rotating shaft 16 b protruding from one side surface of the fan motor 17 is supported by a bearing 18.
The said bearing tool 18 is attached to the top-plate part 1b via the bearing fixing stand 20 mentioned later. That is, like the fan motor 17 and the motor support base 19, the bearing tool 18 and the bearing fixing base 20 are suspended from the top plate portion 1b.

Next, the bearing member 18 and the bearing fixing base 20 that supports the bearing member 18 will be described in detail.
As shown in FIGS. 4 to 6, the bearing fixing base 20 supports the bearing 18, and the fixing plate portion 21 to which the bearing 18 is attached and fixed via an attachment 35 such as an attachment screw, and the fixing. The leg portion 22 is integrally bent from both side edges of the plate portion 21 in a substantially right angle direction, and is configured in a substantially U shape as a whole.

The bent length of the one side edge a in the leg plate portion 22 is formed longer than the bent length of the other side edge b, and is formed obliquely from the lower end of the other side edge b to the lower end of the one side edge a. Edge c. In addition, the fixing piece 23 is bent in a substantially right angle direction across the end edge of the leg plate portion 22. The fixing piece 23 is provided with a mounting hole 23a.
The fixing plate portion 21 is provided with a pair of mounting screw holes 27 at a position biased to one side. The interval between these mounting screw holes 27 is the same as the interval between the mounting holes 18 b provided in the flange portion 18 a of the bearing 18.

A cutout projecting upward in the figure is formed at one side edge of the fixed plate portion 21, a portion opposed to the one side edge with a predetermined interval, and a bent edge portion of the fixed plate portion 21 and the leg plate portion 22 The raising pieces 26a to 26d are integrally provided.
In particular, as shown in FIG. 6, the plurality of cut-and-raised pieces 26 a to 26 d are provided at positions that contact the peripheral edge of the flange portion 18 a of the bearing member 18 with the bearing member 18 supported by the fixed plate portion 21. . In other words, the position of the bearing member 18 supported by the fixed plate portion 21 in the surface direction in the fixed plate portion 21 is surely restricted before the attachment by the mounting device 35.

  A locking piece 24 is integrally projected on the other side edge portion of the leg plate portion 22 that is bent from the fixed plate portion 21. Each of the pair of locking pieces 24 is formed of a protruding piece whose upper end protrudes upward from the plate surface of the fixed plate portion 21 and whose side edge protrudes in the plate surface direction from the side edge of the leg plate portion 22. In particular, as shown in FIGS. 5 and 6, the partition plate 6 is provided with a slit-like engagement hole 28 into which the locking piece 24 is fitted with the bearing fixing base 20 attached at a predetermined position.

A protruding piece 25 that protrudes in the direction of the plate surface of the leg plate portion 22 is integrally provided at an end edge of the leg plate portion 22 that has a predetermined distance from the fixed piece 25. As shown in FIGS. 5 and 6 in particular, the protruding piece 25 is fitted into a slit-like engaging hole 29 provided in the reinforcing concave portion 8a of the top plate portion 1b.
In order to assemble the bearing fixing base 20 configured as described above with respect to the unit main body 1, the unit main body 1 is performed upside down from the actual ceiling mounted state. That is, the top plate portion 1b is on the bottom surface side, and the fixing piece 23 of the bearing fixing base 20 is placed thereon. And the protrusion piece 25 of the leg-plate part 22 is inserted and latched by the engagement hole part 29 of the top-plate part 1b. At the same time, the locking piece 24 of the leg plate portion 22 is inserted and locked into the engaging hole portion 28 of the partition plate 6.

  After this state, the fixture is inserted into the fixing hole 23a of the fixing piece 23, and the fixing piece 23 is screwed to the top plate portion 1b. Further, the bearing member 18 is placed on the fixed plate portion 21. As described above with reference to FIG. 6, the periphery of the flange portion 18 a of the bearing member 18 is fitted into the cut and raised pieces 26 a to 26 d provided on the fixed plate portion 21. By attaching and fixing the flange portion 18a of the bearing member 18 to the fixing plate portion 21 with the attachment member 35, the attachment and fixing of the bearing fixing base 20 to the unit body 1 is completed.

When the assembly of all the components is completed, the product is installed, the refrigeration cycle operation is performed, and the blower S is driven, the indoor air is sucked from the suction port 2 and the heat exchange chamber B through the blower chamber A. The indoor heat exchanger 5 is sprayed. The room air exchanges heat when passing through the indoor heat exchanger 5 and is guided and blown out by the vertical louver 12 and the horizontal louver 13 provided in the outlet 3.
In the blower device S, only one blower fan 4 is provided on one rotary shaft 16a of the fan motor 17, so that even if the rotary shaft 16a is cantilevered, a slight deflection or vibration is caused by rotation. A quiet air blowing effect is achieved.

The other rotating shaft 16b of the fan motor 17 is actually connected to the connecting shaft 16c and is long, and is provided with three blower fans 4. The substantially intermediate portion is connected to the bearing member 18 as a shaft. Since it is supported, it produces a quiet air blowing action without causing any slight deflection or vibration with rotation.
The bearing member 18 is supported by the fixed plate portion 21 of the bearing fixing base 20, and the fixed plate portion 21 is provided with cut and raised pieces 26a to 26d. That is, the alignment operation for the long rotating shaft to which the rotating shaft 16b and the connecting shaft 16c are connected is easy, and high accuracy can be reliably obtained.

The bearing fixing base 20 is composed of a plate body formed in a substantially U shape by a fixing plate portion 21 that supports the bearing member 18 and leg plate portions 22 that are bent along both side edges of the fixing plate portion. The rigidity is high and no vibration is generated even when the blower fan 4 is driven to rotate at high speed.
Since the locking piece 24 is integrally provided on the leg plate portion 22 so as to be engaged with the engaging hole portion 28 of the partition plate 6, the axial rigidity of the fan motor rotating shafts 16 a and 16 b is increased by the locking piece 24. As a result, vibration can be more reliably suppressed.

Since the protruding piece 25 is integrally provided on the leg plate portion 22 so as to be engaged with the engaging hole portion 29 of the top plate portion 1b, the protruding piece 25 serves as a positioning guide when the bearing fixing base 20 is attached. As a result, the assembly work can be facilitated. In addition, no attachment is required for this portion, and assembly is facilitated.
The bearing fixing base of the present invention is not limited to the above-described configuration, and various modifications can be made without departing from the spirit of the present invention, and the present invention includes all of these. .

The perspective view of the indoor unit which comprises the air conditioning apparatus based on embodiment of this invention. Sectional drawing of the indoor unit based on the embodiment. The bottom view of the internal structure of the indoor unit based on the embodiment. The perspective view which decomposed | disassembled the bearing fixing base and bearing based on the embodiment. Sectional drawing which attached the bearing fixing stand based on the embodiment. The perspective view which attached the bearing tool to the bearing fixing base based on the embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 6 ... Partition plate, 5 ... Indoor heat exchanger, B ... Heat exchange chamber, S ... Blower, 1 ... Unit main body, 17 ... Fan motor, 16a, 16b ... Rotary shaft, 17 ... Bearing, 20 ... Bearing fixing stand , 21 ... fixed plate part, 22 ... leg plate part, 24 ... locking piece, 23 ... fixed piece, 25 ... projecting piece, 26a, 26b, 26c, 26d ... cut and raised piece.

Claims (3)

A unit main body partitioned into a heat exchange chamber containing a heat exchanger by a partition plate and a blower chamber containing a blower;
A bearing that pivotally supports the rotation shaft of the fan motor constituting the blower;
In an air conditioner provided with a bearing fixing base that supports and fixes the bearing to the air blowing chamber,
The above bearing fixing base is
A fixing plate part to which the bearing is mounted and fixed;
A leg plate portion formed by bending along both side edges of the fixed plate portion;
A locking piece formed integrally extending from the leg plate portion and locked to the partition plate,
An air conditioner comprising: a fixing piece that is bent along an edge of the leg plate portion and is fixed to the unit body. The leg plate portion constituting the bearing fixing base is:
The air conditioning apparatus according to claim 1, further comprising a protruding piece that is engaged with a top plate portion that constitutes the unit main body. The fixing plate portion constituting the bearing fixing base is:
The air conditioner according to any one of claims 1 and 2, further comprising a cut-and-raised piece that engages with a side edge of the bearing member.

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