JP2015014218A - Air blower and air conditioning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air blower that restrains a fan boss and a motor from being locked by an icicle even if it is installed in a cold region or used in winter, and an air conditioning device including the air blower.SOLUTION: An air blower 2 comprises: a motor 3 including a housing 38 and a shaft 4 that extends upward from the housing 38; an impeller 5 including a fan boss 51 that is attached to the shaft 4 at an upper part of the motor 3 and rotates in association with the rotation of the shaft 4; and a partition plate 7 that is inserted around the shaft 4 so as to be interposed between the housing 38 and the fan boss 51 and is arranged so as to be rotatable with respect to the housing 38. The width of the partition plate 7 is equal to or greater than the width of the housing 38.

Description

  The present invention relates to a blower and an air conditioner including the blower.

  In buildings such as buildings, multi-air conditioners are widely adopted as means for air-conditioning a plurality of spaces. In this multi air conditioner, a plurality of outdoor units are installed, and the plurality of outdoor units are closely arranged to reduce the total installation space. For this reason, the outdoor unit often has a top flow structure in which air is discharged from the upper portion rather than a structure in which air is discharged from the side portion. At that time, air is sucked from the side of the outdoor unit.

  As an outdoor unit having such a top flow structure, Patent Document 1 discloses a housing having an air suction port on a side surface, a plurality of heat exchangers arranged in the housing, a fan (blower), a plurality of An outdoor unit including a pressure loss sheet interposed between the heat exchangers is disclosed. In this prior art, when the air sucked from the air suction port is heat-exchanged by the heat exchanger, part of the air passes through the pressure-loss sheet, reduces the wind speed, and does not pass through the pressure-loss sheet. Air is introduced into the housing while maintaining the wind speed. Thus, this patent document 1 tries to make uniform the wind speed of the air discharged | emitted from an air blower by adjusting the wind speed of the air which passes a heat exchanger.

  As a motor used for an air blower of an outdoor unit having a top flow structure as described in Patent Document 1, an induction motor is often employed from the viewpoint of securing an air passage and reducing costs. Often, small diameter motors are used. On the other hand, the larger the diameter of the motor, the smaller the ratio of iron loss (such as hysteresis loss generated in the stator in the motor) to copper loss (loss caused by current flowing through the winding). Since the loss of the motor itself is reduced, the efficiency of the motor is improved. Thus, the larger the motor diameter, the better the motor efficiency.

JP 2011-102662 A (Claim 1)

  In the outdoor unit having a top flow structure, the air introduced into the housing through the heat exchanger reaches the blower installed at the upper part of the outdoor unit and is discharged by the blower. Therefore, in this outdoor unit, it is necessary to ensure a sufficient air path through which air flows. For this reason, as shown in FIG. 13, the diameter r2 of the motor 3 is often designed to be smaller than the diameter r1 of the fan boss 51 attached to the tip of the shaft 4 extending from the motor 3. The fan boss 51 is a relay member that transmits the rotation of the shaft 4 by the motor 3 to the blades 52.

  On the other hand, in an outdoor unit of an air conditioner installed in a cold region or an outdoor unit of an air conditioner used in winter, since these outdoor units are exposed to cold air, the blades and fans of the outdoor unit The boss may freeze. In the conventional motor, in order to improve the efficiency of the motor, if the diameter of the motor is increased and the diameter r3 of the motor 3 is larger than the diameter r1 of the fan boss 51 as shown in FIG. There is a possibility that the icicle 8 formed by freezing the peripheral portion grows and reaches the motor 3 immediately below it. In this case, the fan boss 51 and the motor 3 are fixed to each other by the icicle 8, and even if the motor 3 is driven, the fan boss 51 fixed to the motor 3 does not rotate. Thereby, the blade | wing 52 does not rotate, Therefore, there exists a possibility that an outdoor unit may not operate | move normally.

  The present invention has been made against the background of the above problems, and a blower that suppresses fixing of a fan boss and a motor by icicles even when installed in a cold region or used in winter. And an air conditioning apparatus provided with this air blower is provided.

  The blower according to the present invention includes a motor having a housing and a shaft extending upward from the housing, an impeller having a fan boss attached to the upper shaft of the motor and rotating as the shaft rotates, a housing, and a fan And a partition plate that is inserted into the shaft so as to be interposed between the bosses and is rotatably arranged with respect to the housing, and the width of the partition plate is equal to or greater than the width of the housing.

  According to the present invention, since the partition plate is interposed between the housing and the fan boss, even if the fan boss is frozen and icicles are formed, these icicles are blocked by the partition plate and reach the housing. Hard to reach. For this reason, even if icicles are formed, the blower can be started smoothly.

1 is a schematic diagram showing an air conditioner 1 according to Embodiment 1. FIG. It is a perspective view which shows the outdoor unit 1a of the air conditioning apparatus 1 which concerns on Embodiment 1. FIG. It is a top view which shows the outdoor unit 1a of the air conditioning apparatus 1 which concerns on Embodiment 1. FIG. It is sectional drawing which shows the outdoor unit 1a of the air conditioning apparatus 1 which concerns on Embodiment 1. FIG. 1 is a perspective view showing a motor 3 in Embodiment 1. FIG. FIG. 3 is a cross-sectional view showing the blower 2 in the first embodiment. 4 is a perspective view showing a partition plate 7 in Embodiment 1. FIG. FIG. 3 is a front view showing the motor 3 in the first embodiment. It is a front view which shows operation | movement of the air blower 2 which concerns on Embodiment 1. FIG. It is a front view which shows operation | movement when the icicle 8 is formed in the air blower 2 which concerns on Embodiment 1. FIG. 6 is a front view showing a motor 3 in a blower 2 according to Embodiment 2. FIG. 6 is a front view showing a motor 3 in a blower 2 according to Embodiment 3. FIG. It is a front view which shows the air blower of the conventional air conditioning apparatus. It is a front view which shows the air blower of the conventional air conditioning apparatus.

  Hereinafter, embodiments of a blower and an air conditioner according to the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments described below. Moreover, in the following drawings including FIG. 1, the relationship of the size of each component may be different from the actual one.

Embodiment 1 FIG.
FIG. 1 is a schematic diagram showing an air conditioner 1 according to Embodiment 1. FIG. The air conditioner 1 will be described with reference to FIG. As shown in FIG. 1, the air conditioning apparatus 1 includes an outdoor unit 1a and an indoor unit 1b. Among these, the outdoor unit 1a is provided with the blower 2, the compressor 12, the first heat exchanger 13 and the expansion means 14, and the indoor unit 1b is provided with the second heat exchanger 15. Yes. The compressor 12, the first heat exchanger 13, the expansion means 14, and the second heat exchanger 15 are connected by piping, and the refrigerant circulates in this piping. Thereby, the refrigerant circuit is constituted.

  Next, the outdoor unit 1a of the air conditioner 1 will be described. 2 is a perspective view showing the outdoor unit 1a of the air-conditioning apparatus 1 according to Embodiment 1, FIG. 3 is a top view showing the outdoor unit 1a of the air-conditioning apparatus 1 according to Embodiment 1, and FIG. It is sectional drawing which shows the outdoor unit 1a of the air conditioning apparatus 1 which concerns on Embodiment 1. FIG. As shown in FIG. 2, the outdoor unit 1a has, for example, a top flow structure. In the outdoor unit 1a, a compressor 12, a first heat exchanger 13 and an expansion means 14 are provided in a rectangular parallelepiped casing 11, and the air heat-exchanged by the first heat exchanger 13 is supplied to the outdoor unit 1a. As shown in FIG. 3, the air is discharged to the outside of the outdoor unit 1a by the blower 2 installed at the upper part of the outdoor unit 1a. As shown in FIG. 4, the blower 2 installed at the upper part of the outdoor unit 1 a includes an impeller 5 and a motor 3 for driving the impeller 5.

  Next, the motor 3 will be described. FIG. 5 is a perspective view showing the motor 3 in the first embodiment, and FIG. 6 is a cross-sectional view showing the blower 2 in the first embodiment. The motor 3 is, for example, a DC brushless motor, and the motor 3 is installed inside the outdoor unit 1a by mounting the base 31 of the motor 3 inside the outdoor unit 1a. The base 31 has, for example, a rectangular shape, and the peripheral edge is bent to form a flange 31a. As shown in FIG. 5, one end of a terminal cable 32 is attached to the base 31, and the other end of the terminal cable 32 is a power source (not shown) installed inside the outdoor unit 1a. It is connected to the. Then, electric power is supplied from the power source to the motor 3 via the terminal cable 32.

  As shown in FIG. 6, a rod-like shaft 4 is provided at the center of the base 31, and a first bearing 33 a is attached to the base end of the shaft 4. A cylindrical rotor 34 is fixed to the shaft 4 coaxially with the shaft 4 above the base 31 (in the direction of arrow Z1). Further, a cylindrical stator 35 is provided around the rotor 34 coaxially with the shaft 4. The stator 35 includes a stator coil 36 and an insulator 37 around which the stator coil 36 is wound. The stator 35 generates a rotating magnetic field by the current flowing through the stator coil 36, and rotates the rotor 34 at the same cycle as this rotating magnetic field. As the rotor 34 rotates, the shaft 4 installed at the center of the rotor 34 also rotates.

  A second bearing 33b is provided above the rotor 34 (in the direction of arrow Z1), and the shaft 4 is smoothly rotated by the second bearing 33b and the first bearing 33a. It is said. The housing 38 protects the rotor 34, the stator 35, the first bearing 33a, and the second bearing 33b, and constitutes the outer shell of the motor 3. The housing 38 may be a mold for sealing these members. The housing 38 protrudes along the shaft 4 and has a bearing housing 38a that houses the second bearing 33b. A bottomed cylindrical flinger 6 is fixed to the shaft 4 so as to cover the bearing housing 38a above the bearing housing 38a (in the direction of the arrow Z1). The flinger 6 suppresses foreign matters such as water from entering the motor 3, that is, the housing 38. A partition plate 7 is interposed between the flinger 6 and the motor 3.

  Next, the impeller 5 will be described. As shown in FIG. 6, the impeller 5 includes a fan boss 51 and a blade 52. Among these, the fan boss 51 has a bottomed cylindrical shape and is attached to the tip of the shaft 4. Thereby, when the shaft 4 rotates, the fan boss 51 rotates accordingly. Further, the blade 52 is formed integrally with the fan boss 51 on the outer peripheral wall of the fan boss 51. Therefore, when the fan boss 51 rotates, the blade 52 also rotates accordingly. The blades 52 discharge air introduced into the outdoor unit 1a to the outside of the outdoor unit 1a. The fan boss 51 has a width rf that is equal to or smaller than the width rm of the housing 38 that forms the outer shell of the motor 3. Thereby, the efficiency of the motor 3 is ensured.

  Next, the partition plate 7 will be described. FIG. 7 is a perspective view showing the partition plate 7 in the first embodiment, and FIG. 8 is a front view showing the motor 3 in the first embodiment. As shown in FIG. 7, the partition plate 7 has a disc shape with a circular hole 7a provided at the center. As shown in FIG. 8, the partition plate 7 is placed on the upper surface of the housing 38, and the diameter of the hole 7a provided at the center of the partition plate 7 is larger than the diameter of the bearing housing 38a. The partition plate 7 is inserted into the shaft 4 and is rotatably arranged with respect to the housing 38. Further, the partition plate 7 is placed on the upper surface of the housing 38 by avoiding the bearing housing 38 a by the hole 7 a. The flinger 6 is fixed to the shaft 4 above the bearing housing 38a and the partition plate 7 while being separated from the bearing housing 38a and the partition plate 7. As shown in FIG. 5, the width rb of the partition plate 7 is greater than or equal to the width rm of the housing 38.

  When the width rb of the partition plate 7 is larger than the width rm of the housing 38, the peripheral portion of the partition plate 7 projects from the housing 38 in a state where the partition plate 7 is placed on the housing 38. When the partition plate 7 has flexibility, the protruding portion is inclined toward the housing 38 by its own weight. The partition plate 7 may be a rubber plate having a thickness of 3 mm, for example. In this case, CR (chloroprene rubber) can be used as the rubber plate. In addition, the thickness of the partition plate 7 can be designed as appropriate. Moreover, it is preferable that the partition plate 7 has a weather resistance, and the material is not limited to a rubber plate, and may be a resin plate or a metal plate.

  Next, the effect | action of the air conditioning apparatus 1 which concerns on this Embodiment is demonstrated. First, the operation of the air conditioner 1 during normal operation will be described. FIG. 9 is a front view illustrating the operation of the blower 2 according to the first embodiment. As shown in FIG. 9, when the motor 3 is driven and the shaft 4 is rotated, the flinger 6 fixed to the shaft 4 and the fan boss 51 provided at the tip of the shaft 4 are rotated accordingly. As the fan boss 51 rotates, the blade 52 rotates. Thereby, the air introduced into the outdoor unit 1a is discharged. At that time, since the partition plate 7 is not fixed to either the shaft 4 or the flinger 6, it does not rotate with the rotation of the shaft 4.

  Next, the operation of the air conditioner 1 when icicles are formed on the fan boss 51 will be described. FIG. 10 is a front view showing an operation when icicles 8 are formed on the blower 2 according to the first embodiment. When the air conditioner 1 is installed in a cold region or used in winter, the outdoor unit 1a is exposed to cold air, so the blades 52 and the fan bosses 51 may freeze. As shown in FIG. 10, when the peripheral portion of the fan boss 51 is frozen to form the icicle 8, the icicle 8 reaches the partition plate 7 installed immediately below the icicle 8. The fan boss 51 and the partition plate 7 are fixed by the icicle 8. In this state, when the motor 3 is driven and the shaft 4 is rotated, the fan boss 51 and the partition plate 7 are fixed by the icicles 8, and accordingly, with the rotation of the fan boss 51 due to the rotation of the shaft 4, The partition plate 7 also rotates together.

  In the outdoor unit 1a of the conventional air conditioner, as shown in FIG. 14, the icicles 8 formed on the peripheral edge of the fan boss 51 reach the motor 3 as they are. And are fixed. For this reason, even if the motor 3 is driven and the shaft 4 tries to rotate, the fan boss 51 provided at the tip of the shaft 4 does not rotate, and therefore the shaft 4 itself does not rotate. Thereby, the blade | wing 52 also does not rotate.

  On the other hand, the outdoor unit 1a of the air conditioner 1 according to the first embodiment partitions the icicle 8 formed on the peripheral edge of the fan boss 51 from reaching the motor 3, as shown in FIG. The plate 7 is blocked. And this partition plate 7 is not being fixed to the motor 3, but is only mounted. For this reason, even if the fan boss 51 and the partition plate 7 are fixed, the fan boss 51 and the motor 3 are not fixed. Therefore, in this Embodiment 1, not only in a cold region, even if the icicle 8 is formed in the outdoor unit 1a of the air conditioner 1 and used in an environment below 0 ° C. in the winter season, the blower 2 is made smooth. Can be activated. Thus, the air conditioning apparatus 1 provided with the air blower 2 can respond to all environments.

  In addition, since the partition plate 7 is not fixed to the motor 3, the partition plate 7 may be lifted by the wind pressure when the blade 52 rotates. However, since the flinger 6 is arranged above the partition plate 7 (in the direction of the arrow Z1), as shown in FIG. 10, even if the partition plate 7 is raised, the partition plate 7 hits the flinger 6 and The rise of the plate 7 is prevented. Thus, by interposing the partition plate 7 between the flinger 6 and the motor 3, it is possible to suppress the partition plate 7 from being lifted by wind pressure.

  In addition, the icicles may be formed on a portion other than the peripheral portion of the fan boss 51. However, since the partition plate 7 or the flinger 6 is disposed directly below the fan boss 51, even if the icicle grows, it reaches either the partition plate 7 or the flinger 6 and reaches the housing 38 of the motor 3. Not reach. For this reason, it can suppress that the fan boss | hub 51 and the motor 3 are fixed irrespective of the position where an icicle is formed.

  It should be noted that by increasing the distance between the fan boss 51 and the motor 3, it is possible to delay the growth of icicles to reach the motor 3. However, in this case, there is a problem in that an air path for air until it is discharged by the blades 52 is secured. The air introduced into the outdoor unit 1a rises inside the outdoor unit 1a due to the rotation of the blades 52 installed at the upper part of the outdoor unit 1a, passes through the periphery of the motor 3, and passes through the blades 52 and the fan bosses 51. And then discharged from the upper part of the outdoor unit 1a. At this time, if the gap between the fan boss 51 and the motor 3 is wide, the air introduced into the outdoor unit 1a reaches the motor 3 as quickly as that. Since the motor 3 serves as a barrier that hinders the air flow, if the distance between the fan boss 51 and the motor 3 is increased, the air reaches the motor 3 as much as that distance, thus hindering the air flow. Easy to be. Accordingly, if the distance between the fan boss 51 and the motor 3 is increased in order to delay the icicle from reaching the motor 3, the resistance of the air path increases. On the other hand, in this Embodiment 1, since the icicle is prevented from reaching the motor 3 by providing the partition plate 7, the fan boss 51 and the motor 3 can be brought close to each other. Therefore, it is possible to secure a sufficient air path through which air flows.

Embodiment 2. FIG.
Next, the air conditioning apparatus 1 according to Embodiment 2 will be described. FIG. 11 is a front view showing the motor 3 in the blower 2 according to the second embodiment. The second embodiment is different from the first embodiment in that the partition plate 7 and the flinger 6 are integrally formed. In the second embodiment, portions common to the first embodiment are denoted by the same reference numerals, description thereof is omitted, and differences from the first embodiment will be mainly described.

  In the second embodiment, as shown in FIG. 11, the partition plate 7 and the flinger 6 are integrally formed. Specifically, the lower surface of the peripheral edge of the flinger 6 is joined to the upper surface of the partition plate 7, so that the flinger 6 and the partition plate 7 are integrally formed. In the second embodiment, the operation when icicles are formed is the same as that in the first embodiment. On the other hand, the operation of the air conditioner 1 at the normal time is different from that of the first embodiment. That is, when the motor 3 is driven and the shaft 4 rotates in a normal state, not only the flinger 6 fixed to the shaft 4 rotates, but also the partition plate 7 formed integrally with the flinger 6. Also rotate at the same time. Thus, in Embodiment 2, the partition plate 7 rotates not only when icicles are formed, but also during normal times when icicles are not formed. Thereby, in addition to the effect obtained in the first embodiment, there is an effect of cost reduction due to the integral formation of the partition plate 7 and the flinger 6.

Embodiment 3 FIG.
Next, the air conditioning apparatus 1 according to Embodiment 3 will be described. FIG. 12 is a front view showing the motor 3 in the blower 2 according to the third embodiment. The third embodiment is different from the first embodiment in that the peripheral edge portion of the partition plate 7 is an inclined portion 7b inclined toward the housing 38 side. In the third embodiment, portions common to the first embodiment are denoted by the same reference numerals, description thereof is omitted, and differences from the first embodiment will be mainly described.

  In the third embodiment, as shown in FIG. 12, the peripheral edge portion of the partition plate 7 is an inclined portion 7b inclined toward the motor 3 side. Also in the first embodiment, when the width rb of the partition plate 7 is larger than the width rm of the housing 38, the portion where the peripheral edge of the partition plate 7 protrudes from the housing 38 is inclined toward the housing 38 by its own weight. Sometimes. The third embodiment is different from the first embodiment in that not only the dead weight but also the peripheral edge of the partition plate 7 is positively inclined. In the third embodiment, in addition to the effects obtained in the first embodiment, the inclined portion 7b is formed on the peripheral portion of the partition plate 7, so that after the icicles reach the partition plate 7, the partition plate 7 There is an effect that it is suppressed to reach the motor 3 around the periphery.

  In addition, the partition plate 7 of the blower 2 according to the present invention is not limited to a flat plate, and may be a plate in which concentric grooves are formed. Further, the partition plate 7 may be fixed to the shaft 4.

  DESCRIPTION OF SYMBOLS 1 Air conditioning apparatus, 1a outdoor unit, 1b indoor unit, 2 air blower, 3 motor, 4 shaft, 5 impeller, 6 flinger, 7 partition plate, 7a hole, 7b inclined part, 8 icicle, 11 housing, 12 compressor , 13 1st heat exchanger, 14 expansion means, 15 2nd heat exchanger, 31 base, 31a flange, 32 terminal cable, 33a 1st bearing, 33b 2nd bearing, 34 rotor, 35 stator, 36 stator coil, 37 insulator, 38 housing, 38a bearing housing, 51 fan boss, 52 blades.

Claims (7)

A motor comprising a housing and a shaft extending upward from the housing;
An impeller attached to the shaft at the top of the motor and having a fan boss that rotates as the shaft rotates;
A partition plate inserted into the shaft so as to be interposed between the housing and the fan boss, and arranged to be rotatable with respect to the housing,
The blower characterized in that a width of the partition plate is not less than a width of the housing. The blower according to claim 1, wherein the partition plate is placed on an upper surface of the housing. The blower according to claim 1, wherein a width of the fan boss is equal to or less than a width of the housing. The flinger which is provided between the partition plate and the impeller in the shaft and further suppresses foreign matter from entering the motor. The blower described. The blower according to claim 4, wherein the partition plate and the flinger are integrally formed. The blower according to any one of claims 1 to 5, wherein a peripheral portion of the partition plate is inclined toward the housing. An outdoor unit comprising the blower, the compressor, the first heat exchanger and the expansion means according to any one of claims 1 to 6;
An indoor unit comprising a second heat exchanger,
The air conditioner characterized in that the compressor, the first heat exchanger, the expansion means, and the second heat exchanger are connected by piping to form a refrigerant circuit in which the refrigerant circulates.

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