CN110741206B

CN110741206B - Air conditioner

Info

Publication number: CN110741206B
Application number: CN201880036907.XA
Authority: CN
Inventors: 细川和真; 蔡佳烨
Original assignee: Hitachi Johnson Controls Air Conditioning Inc
Current assignee: Hitachi Johnson Controls Air Conditioning Inc
Priority date: 2018-05-14
Filing date: 2018-05-14
Publication date: 2021-05-04
Anticipated expiration: 2038-05-14
Also published as: JPWO2019220494A1; EP3795911A4; EP3795911A1; WO2019220494A1; TWI690679B; TW201947162A; CN110741206A; EP3795911B1; JP6534784B1

Abstract

An air conditioner (10) is provided with: a heat exchanger (31); an air supply fan (38); a brush (41) as a cleaning part for cleaning the air supply fan; and a motor (51) which is arranged outside the side plate (32) of the heat exchanger and drives the cleaning part, wherein the main body of the motor is arranged outside the outer end part (34a) of the bending part of the hairpin tube (34) arranged on the heat exchanger.

Description

Air conditioner

Technical Field

The present invention relates to an air conditioner.

Background

Generally, as the air conditioner including the blower fan therein is used for a longer time, more dust adheres to the blower fan. This may reduce the air volume or increase the power consumption of the air conditioner. In addition, the air conditioner may be unsanitary due to the growth of mold and the like caused by the adhesion of dust. Accordingly, an air conditioner is provided with a fan cleaning device that removes dust adhering to an air blowing fan and cleans the air blowing fan (see, for example, patent document 1). The air conditioner described in patent document 1 includes a fan cleaning device and a control device that controls the fan cleaning device, and has a normal operation mode in which conditioned air is blown out into a room, and a fan cleaning operation mode in which a fan is rotated at a low speed and the fan cleaning device is moved. The fan cleaning device includes a cleaning portion that comes into contact with the fan in the fan cleaning operation mode, and is movable to a position where the cleaning portion is retracted from the fan in the normal operation mode.

However, the fan cleaning device rotationally drives the cleaning unit by a motor. The motor is efficient if it is disposed at a position close to the rotation shaft of the cleaning unit. Here, in the air conditioner, the motor of the fan cleaning device is attached to a side surface of the heat exchanger (specifically, an outer wall surface of a side plate constituting the side surface of the heat exchanger) and a portion close to the rotating shaft of the cleaning portion.

Documents of the prior art

Patent document

Patent document 1: japanese patent No. 4046755

Disclosure of Invention

Problems to be solved by the invention

However, in the conventional air conditioner, since the motor of the fan cleaning device is disposed at this position as described below, the dew condensation water adheres to the motor, and the failure rate of the motor may increase.

For example, in an air conditioner, a heat exchanger is cooled during a cooling operation. Thereby, the outer wall surface of the side plate constituting the side surface of the heat exchanger is cooled. The motor of the conventional air conditioner is mounted on the outer wall surface of the side plate. Therefore, the motor is excessively cooled by the influence of the cold air transferred from the side plate, and dew may be generated and attached to the motor. Therefore, the failure rate of the motor may increase.

Further, for example, hairpin tubes bulging outward are arranged on side plates of the heat exchanger. In the air conditioner, during cooling operation, refrigerant flows through the hairpin tube, and dew condensation water adheres to the hairpin tube. In the conventional air conditioner, since the motor is disposed directly below the hairpin tube, dew drops from the hairpin tube and falls to the motor. This may increase the failure rate of the motor.

The present invention has been made to solve the above problems, and an object thereof is to provide an air conditioner capable of suppressing dew condensation water from adhering to a motor of a fan cleaning device.

Means for solving the problems

In order to achieve the above object, the present invention provides an air conditioner comprising: a heat exchanger; an air supply fan; a cleaning part for cleaning the air supply fan; and a motor disposed outside the side plate of the heat exchanger and driving the cleaning unit, wherein a main body of the motor is disposed outside an outer end of a bent portion of a hairpin tube provided in the heat exchanger.

Other schemes are described later.

Effects of the invention

According to the present invention, adhesion of dew condensation water to the motor of the fan cleaning device can be suppressed.

Drawings

Fig. 1 is a schematic diagram showing the overall configuration of an air conditioner according to embodiment 1.

Fig. 2 is a schematic diagram showing a heat exchanger of an indoor unit of an air conditioner according to embodiment 1 and a configuration around the heat exchanger.

Fig. 3 is a schematic diagram showing a fan cleaning device according to embodiment 1 and its surrounding structure.

Fig. 4 is an exploded view showing the structure of a motor unit of the fan cleaning device according to embodiment 1.

Fig. 5 is a schematic diagram showing a suitable arrangement position of the motor module according to embodiment 1.

Fig. 6A is a schematic view (1) showing a suitable arrangement relationship between the motor and the drain pan of the motor module of embodiment 1.

Fig. 6B is a schematic diagram (2) showing a suitable arrangement relationship between the motor and the drain pan of the motor module of embodiment 1.

Fig. 6C is a schematic diagram (3) showing a suitable arrangement relationship between the motor and the drain pan of the motor module of embodiment 1.

Fig. 7 is a schematic view showing the structure of the cleaning unit used in embodiment 1.

Fig. 8 is a schematic view showing the structure of another cleaning unit used in embodiment 1.

Fig. 9 is a perspective view of a main part showing a configuration of another cleaning unit used in embodiment 1 (1).

Fig. 10 is a perspective view (2) of a main part showing the structure of another cleaning unit used in embodiment 1.

Fig. 11 is a schematic diagram showing a configuration of a motor module according to embodiment 2.

Fig. 12 is an exploded view showing the structure of a motor module according to embodiment 2.

Fig. 13 is a schematic diagram showing an internal structure of a motor assembly according to embodiment 2.

Fig. 14 is a schematic diagram showing an internal structure of a motor module according to modification 1.

Fig. 15 is a schematic diagram showing an internal structure of a motor module according to modification 2.

Fig. 16 is a schematic diagram showing an internal structure of a motor module according to modification 3.

Fig. 17 is a schematic diagram showing an internal structure of a motor module according to modification 4.

Detailed Description

Hereinafter, an embodiment of the present invention (hereinafter referred to as "the present embodiment") will be described in detail with reference to the drawings. The drawings are schematically illustrated only to the extent that the present invention can be fully understood. The invention is thus not limited to the figure examples. In the drawings, the same components and the same components are denoted by the same reference numerals, and redundant description thereof will be omitted.

[ embodiment 1]

Embodiment 1 is directed to providing an air conditioner 10 as follows.

(1) As shown in fig. 5, the air conditioner 10 according to embodiment 1 separates the motor 51 from the side plate 32 of the heat exchanger 31, and prevents dew condensation water generated by excessive cooling of the motor 51 by the influence of cold air transferred from the side plate 32 from adhering to the motor 51.

(2) As shown in fig. 5, the air conditioner 10 according to embodiment 1 displaces the motor 51 outward (leftward in fig. 5) from a position directly below the hairpin tube 34 so that dew water dropping from the hairpin tube 34 does not fall down to the main body of the motor 51.

(3) As shown in fig. 3, the air conditioner 10 according to embodiment 1 covers the main body of the motor 51 with the motor cover 60, thereby preventing dew condensation water from dripping onto the main body of the motor 51 or adhering thereto. As shown in fig. 3, the air conditioner 10 according to embodiment 1 covers the upper side of the inner end portion of the motor 51 with the projection 32p, so that dew condensation water does not drip down to the main body of the motor 51 and adheres thereto. As shown in fig. 6A to 6C, the air conditioner 10 according to embodiment 1 can reliably receive dew condensation water that has adhered to the motor cover 60 and has dripped, by the drain pan 39.

< integral construction of air conditioner >

The overall configuration of the air conditioner 10 according to embodiment 1 will be described below with reference to fig. 1. Fig. 1 is a schematic diagram showing the overall configuration of an air conditioner 10 according to embodiment 1.

As shown in fig. 1, the air conditioner 10 includes an indoor unit 11 disposed indoors and an outdoor unit 12 disposed outdoors.

The indoor unit 11 sucks indoor air into the interior, passes the sucked indoor air through the heat exchanger 31 (see fig. 2), obtains conditioned air to which any one of heating, cooling, and dehumidification is applied, and blows out the obtained conditioned air into the room to air-condition the room. The indoor unit 11 is connected to the outdoor unit 12 via a connection pipe 13, and circulates a refrigerant to the outdoor unit 12. The outdoor unit 12 exchanges heat with the circulated refrigerant.

In the indoor unit 11, structures such as the blower fan 38 (see fig. 2) and the heat exchanger 31 (see fig. 2) are provided in the casing 21 and the decorative frame 22 as the exterior member thereof. The blower fan 38 is a cross-flow fan that sends air from the air inlet 24 side to the air outlet 25 side, and blows air that has been heat-exchanged by the heat exchanger 31. The heat exchanger 31 is a unit that exchanges heat with the refrigerant.

In the example shown in fig. 1, a front panel 23 is attached to an upper portion of the front surface of the decorative frame 22 (exterior member). The front panel 23 covers the front surface of the indoor unit 11. Further, a vertical air deflector 26 is attached to a lower portion of the front surface of the decorative frame 22.

The up-down wind direction plate 26 is a member that defines the direction of the conditioned air blown out from the air outlet 25 in the up-down direction. The up-down wind direction plate 26 is pivotally supported near the lower end by the drain pan 39 so that the upper portion is opened and closed in the up-down direction, and is configured to be rotated by a driving unit, not shown. The indoor unit 11 forms an air outlet 25 by opening the vertical louver 26.

< construction of Heat exchanger and surroundings thereof >

The following describes the heat exchanger 31 of the indoor unit 11 of the air conditioner 10 and the structure around the heat exchanger with reference to fig. 2 and 3. Fig. 2 is a schematic diagram showing the heat exchanger 31 and its surrounding structure. Fig. 3 is a schematic diagram showing the configuration of the fan cleaning device 40 and its surroundings.

As shown in fig. 2, in the indoor unit 11, structures such as the blower fan 38, the heat exchanger 31, and a drain pan 39 that receives dew condensation water that has adhered to and dropped from the heat exchanger 31 during the cooling operation are disposed. The heat exchanger 31 includes a plurality of fins 31a for exchanging heat between the refrigerant and the indoor air and a plurality of hairpin tubes 34 arranged so as to penetrate the fins 31a and through which the refrigerant flows. As shown in fig. 3, the heat exchanger 31 has side plates 32 constituting side surfaces at both ends. The fins 31a, the hairpin tubes 34, and the like are cooled during the cooling operation, and dew condensation water adheres thereto. The dew condensation water adhering to these components drips down and is received by the drain pan 39 (see fig. 2).

The side plate 32 is provided with a projection 32 p. The protruding portion 32p is formed to protrude from the outer surface of the side plate 32 so as to cover at least the upper side of the inner end portion of the motor 51 so that dew condensation water dropping from the hairpin tube 34 does not fall to the motor unit 50 (particularly, the main body of the motor 51) described later. The hairpin tube 34 is curved so as to be folded back near the outer side of the side plate 32. The hairpin tubes 34 are connected to each other by a tube not shown.

If the indoor unit 11 is continuously used, dust and the like adhere to the blower fan 38. Therefore, as shown in fig. 2 and 3, the indoor unit 11 includes a fan cleaning device 40 for cleaning the blower fan 38.

As shown in FIG. 3, fan cleaning device 40 includes brush 41, shaft 45, and motor assembly 50

The brush 41 is a member (cleaning portion) that is brought into contact with the blower fan 38 (see fig. 2) to perform cleaning.

The shaft 45 is a member for holding the brush 41 (cleaning unit).

The motor unit 50 is a driving mechanism for rotationally driving the shaft 45 in the axial direction.

The brush 41 is configured to be separate from the shaft 45, and can be attached to and detached from the shaft 45. Here, an example in which the cleaning unit of the fan cleaning device 40 is constituted by the brush 41 will be described. However, the cleaning unit of the fan cleaning device 40 may be formed of a plate having elasticity such as a sponge or an elastic body, instead of the brush 41 having a hair shape.

The brush 41 and the shaft 45 are each a long member. Hereinafter, the brush 41 and the shaft 45 will be collectively referred to as "brush 41 and the like". The brush 41 and the like are disposed between the heat sink 31a (see fig. 2) of the heat exchanger 31 and the blower fan 38 so as to be rotatable around the axis. The brush 41 or the like is slightly longer than the longitudinal length of the blower fan 38 so as to cover the entire longitudinal area of the blower fan 38. The brushes 41 and the like are disposed so that both end portions thereof penetrate the two side plates 32 disposed at both end portions of the heat exchanger 31.

Both end portions of the brush 41 and the like are rotatably held by a motor unit 50, a bearing member not shown, and the like.

The brush 41 has a plurality of fiber portions 42 and a brush base portion 43. The fiber portion 42 is a contact portion that contacts the blower fan 38. The brush base 43 is a base for holding each fiber part 42.

The motor unit 50 includes a motor 51 for rotationally driving the brush 41 and the like, and a motor cover 60 for covering the periphery of the motor 51. The rotating shaft 52 of the motor 51 is directly or indirectly coupled to the shaft 45 via a gear, an adapter, or the like, not shown. In the example shown in fig. 3, the spacer 69 shown in fig. 5 is not used, but the motor unit 50 may be attached to the side plate 32 of the heat exchanger 31 by the spacer 69 shown in fig. 5.

Fig. 4 shows a structure of a motor unit 50 according to the present embodiment. Fig. 4 is an exploded view of the motor assembly 50 of the present embodiment. Fig. 4 shows an example in which the motor unit 50 is disassembled into the motor 51, the heat insulator 54, and the motor cover 60.

In the example shown in fig. 4, the motor 51 includes a rotary shaft 52, a lead wire 53 drawn out from the inside of the main body to the outside, and a fixing portion 56 connected to a motor cover 60 by a screw 55. The heat insulator 54 is in the form of a belt and is wound around the main body of the motor 51 so as to cover at least the peripheral surface of the main body of the motor 51 (see hollow arrow a 11).

The motor cover 60 includes a housing portion 61 that houses the main body of the motor 51, and a fixing portion 66 that is connected to the side plate 32 of the heat exchanger 31 and the like with screws 65. A groove 62 for housing the lead 53 of the motor 51 is formed in a lower portion of the inner peripheral surface of the housing portion 61.

The motor 51 wound with the heat insulator 54 is housed in the housing portion 61 of the motor cover 60 (see hollow arrow a 12). At this time, the lead wire 53 of the motor 51 is drawn out to the outside of the motor cover 60 through the groove 62 of the motor cover 60.

When the motor 51 is housed in the housing portion 61 of the motor cover 60, the screw 55 connects the motor 51 and the motor cover 60 via the fixing portion 56 of the motor 51. Thereby, the motor assembly 50 is assembled. The motor unit 50 is disposed outside the side plate 32 (see fig. 3) of the heat exchanger 31. The motor cover 60 is coupled to the object to be attached by screws 65 passing through the fixing portions 66 of the motor cover 60.

< location of appropriate arrangement of Motor Assembly >

Fig. 5 shows a suitable arrangement of the motor unit 50 according to the present embodiment. Fig. 5 is a schematic diagram showing a suitable arrangement position of the motor unit 50 of the present embodiment.

For example, in the air conditioner 10, the heat exchanger 31 is cooled during the cooling operation. Thereby, the outer wall surfaces of the side plates 32 of the heat exchanger 31 become cold. If the motor 51 is directly attached to the outer wall surface of the side plate 32, dew condensation water may be attached to the main body of the motor 51 by the influence of cold air transmitted from the side plate 32. Therefore, such a configuration is not preferable.

Therefore, as shown in fig. 5, in the air conditioner 10 of the present embodiment, the motor 51 is disposed so that the inner end portion 50x of the main body of the motor 51 is separated from the side plate 32. Specifically, the air conditioner 10 is provided with a spacer 69, a space, and the like between the heat exchanger 31 and the motor unit 50. In the example shown in fig. 5, the air conditioner 10 is configured such that the inner end portion 50x of the main body of the motor 51 is separated from the side plate 32 by attaching the motor unit 50 to the heat exchanger 31 via the spacer 69, the space, and the like.

Even if the inner end portion 50x of the main body of the motor 51 is separated from the side plate 32, if the separation distance is insufficient, dew adhered to the hairpin tube 34 may drip down to the motor unit 50.

In this case, the air conditioner 10 is not preferable, particularly, if the dew condensation water drops near the mating surface 50z between the motor unit 50 and the spacer 69, for the following reason. For example, generally, the mating face 50z is sealed. However, if the mating surface 50z is spaced, dew condensation water may intrude into the mating surface 50z through the gap and reach the body of the motor 51. Therefore, dew condensation water may be attached to the main body of the motor 51. Therefore, the dew condensation water drops to the vicinity of the mating surface 50z undesirably. Therefore, it is preferable that the air conditioner 10 ensure a sufficient separation distance between the inner end portion 50x of the main body of the motor 51 and the side plate 32.

Therefore, as shown in fig. 5, in the air conditioner 10 of the present embodiment, for example, the motor 51 (motor unit 50) is disposed such that the inner end portion 50x of the main body of the motor 51 is located outward by a distance t1 from the outer end portion 34a of the bent portion of the hairpin tube 34. This makes it possible for the air conditioner 10 to prevent dew condensation water dropping from the hairpin tube 34 from adhering to the main body of the motor 51. Here, the term "outside" means a side of the side plate 32 away from the heat exchanger 31.

However, in the air conditioner 10, when the separation distance between the inner end portion 50x of the main body of the motor 51 and the side plate 32 is excessively large, the outer end portion 50y of the motor unit 50 comes into contact with the inner wall surface of the decorative frame 22. Thus, when the motor 51 is driven, the vibration of the motor 51 may be transmitted to the decorative frame 22 to generate noise.

Therefore, as shown in fig. 5, in the air conditioner 10 of the present embodiment, for example, the motor 51 (motor module 50) is disposed such that the outer end portion 50y of the motor module 50 is located inward of the inner wall surface of the decorative frame 22 by a distance t 2. Thus, the air conditioner 10 can suppress the transmission of vibration of the motor 51 to the decorative frame 22 and the generation of noise when the motor 51 is driven.

< proper arrangement relationship between motor and drain pan of motor assembly >

Fig. 6A to 6C show a suitable arrangement relationship between the motor 51 and the drain pan 39 of the motor assembly 50 of the present embodiment. Fig. 6A to 6C are schematic views each showing a suitable arrangement relationship between the motor 51 and the drain pan 39 of the motor assembly 50 of the present embodiment.

As shown in fig. 6A and 6B, the drain pan 39 is preferably disposed below the heat exchanger 31 (see fig. 2) and the motor cover 60 so as to extend to the outside of the inner end portion of the motor cover 60 (the inner end portion 50x of the motor 51). That is, the drain pan 39 may be disposed below the heat exchanger 31 (see fig. 2) and the motor cover 60, and an end of the drain pan 39 may be located outside an inner end of the motor cover 60 (an inner end 50x of the motor 51). This allows the air conditioner 10 to reliably receive the dew condensation water that has adhered to and dropped from the motor cover 60 by the drain pan 39.

As shown in fig. 6B, the lower portion of the motor cover 60 is preferably an inclined portion that descends from the outer end portion side toward the inner end portion side. Thus, the air conditioner 10 can cause the lower surface of the lower portion of the motor cover 60 to function as the flow path R11 for dew condensation water adhering to the motor cover 60. As a result, the air conditioner 10 can guide the dew condensation water adhering to the motor cover 60 to the drain pan 39 and can receive the dew condensation water efficiently and reliably by the drain pan 39.

As shown in fig. 6C, the entire motor cover 60 may be disposed inside the outer end of the drain pan 39. This allows the air conditioner 10 to reliably receive the dew condensation water that has adhered to and dropped from the motor cover 60 by the drain pan 39.

< construction of cleaning section >

Fig. 7 shows a structure of a brush 41 (cleaning unit) used in the present embodiment. Fig. 7 is a schematic diagram showing the structure of the brush 41 (cleaning unit).

As shown in fig. 7, the brush 41 has a structure in which a flocked region 43a to which the fiber part 42 is flocked is formed along the entire region of the brush base 43.

The brush 41 is inserted into a housing portion 45a (see fig. 9) provided in the shaft 45, and is attached to the shaft 45. The brush 41 can be removed from the shaft 45 by being pulled out from the housing portion 45a (see fig. 9).

The shaft 45 is disposed inside the indoor unit 11 so that both end portions thereof penetrate the two side plates 32 disposed at both end portions of the heat exchanger 31. However, fig. 7 shows only the side plate 32 disposed on the left side. Both end portions of the shaft 45 are rotatably held by a motor 51 (motor unit 50), a bearing member (not shown), and the like.

The example shown in fig. 7 is an example in which a bearing member (not shown) disposed on the right side of the shaft 45 is removed, and the brush 41 is inserted into the housing portion 45a (see fig. 9) from the right side toward the left side of the shaft 45. However, the brush 41 can be inserted into the housing portion 45a from the left side toward the right side of the shaft 45 by removing the motor 51 (motor assembly 50) disposed on the left side of the shaft 45 (see fig. 9).

The brush 41 is set to have a strength enough to be easily inserted into the housing portion 45a of the shaft 45 while maintaining elasticity (see fig. 9). Thereby, the brush 41 can be easily replaced by being pulled out or inserted from the lateral direction of the shaft 45. The brush base 43 (base) of the brush 41 (cleaning unit) may have a bendable elasticity. Thus, the fan cleaning device 40 can be attached to (inserted into) and detached from (pulled out of) the shaft 45 by bending the brush base 43 of the brush 41. That is, the fan cleaning device 40 can perform the replacement operation by bending the brush base 43. Such a fan cleaning device 40 can easily perform the replacement work of the brush 41 in a narrow space (for example, the replacement work of the brush 41 of the air conditioner 10 installed near a corner of a room).

< construction of other cleaning section >

The brush 41 shown in fig. 7 forms a flocked area 43a along the entire area of the brush base 43. Therefore, the fiber part 42 near the end part abuts against the side plate 32 of the heat exchanger 31. By using the brush 41 shown in fig. 7, the fan cleaning device 40 applies a load to the brush 41 when the brush 41 is rotated to bring the brush 41 into contact with the blower fan 38 when cleaning the blower fan 38, and the brush 41 is likely to be dirty.

Therefore, the fan cleaning device 40 may use, for example, a brush 41A shown in fig. 8 to 10 instead of the brush 41. Fig. 8 to 10 show a structure of a brush 41A as another cleaning unit used in the present embodiment. Fig. 8 is a schematic diagram showing the structure of the brush 41A. Fig. 9 and 10 are main part perspective views showing the structure of the brush 41A.

As shown in fig. 8 and 10, the brush 41A has a bristle-implanted region 43a in which the fiber portion 42 is implanted and a non-bristle-implanted region 43b in which the fiber portion 42 is not implanted in the brush base portion 43. The bristle-implanted region 43a is formed at one end or a portion other than both ends of the brush base 43. The non-flocked region 43b is formed at one or both ends of the brush base 43. The non-flocked area 43b is provided so as to extend from the outside to the inside of the side plate 32.

As shown in fig. 9, the brush 41A is inserted into a housing portion 45a provided in the shaft 45 and attached to the shaft 45. The brush 41A can be removed from the shaft 45 by being pulled out from the housing portion 45 a.

As shown in fig. 8 and 10, the brush 41 has a handle portion 43c at an end of the brush base 43 for gripping the brush base 43 with a human hand.

The grip portion 43c is formed at a position closer to the end portion of the brush base portion 43 than the non-flocked area 43 b. As shown in fig. 8 and 10, in a state where the brush 41A is attached to the shaft 45, the grip portion 43c protrudes to the outside from the end portion of the shaft 45.

In the fan cleaning device 40, the brush 41A can be easily detached from the shaft 45 by gripping the grip portion 43c with a human hand. At this time, the operator can replace the brush 41A at a position where the brush 41A does not collide with the blower fan 38 or the heat exchanger 31 by manually changing the direction of the brush 41A by operating the handle portion 43 c. The brush base 43 of the brush 41A may have a bendable elasticity as in the brush base 43 of the brush 41 shown in fig. 7.

When the fan cleaning device 40 rotates the brush 41A during cleaning of the blower fan 38, the fiber portion 42 does not abut against the side plate 32 of the heat exchanger 31 at one or both ends of the brush 41A. Therefore, fan cleaning device 40 can reduce the load applied to brush 41A when rotating brush 41A. Further, fan cleaning device 40 can make brush 41A less prone to becoming dirty.

In addition, since the fan cleaning device 40 is provided with the handle portion 43c in the brush base portion 43, the brush 41 can be easily pulled out from the space in the lateral direction of the heat exchanger 31.

< main characteristics of air conditioner >

(1) As shown in fig. 5, in the air conditioner 10 of the present embodiment, the main body of the brush-driving motor 51 is disposed outside (on the left side in fig. 5) the outer end portion 34a of the bent portion of the hairpin tube 34 provided in the heat exchanger 31.

Such an air conditioner 10 can ensure a space between the motor 51 and the outer end 34a of the bent portion of the hairpin tube 34 provided in the heat exchanger 31. Thus, the air conditioner 10 can suppress the occurrence of dew condensation water adhering to the motor 51 caused by excessive cooling of the motor 51 by the influence of the cold air transferred from the side plate 32 of the heat exchanger 31.

In addition, in the air conditioner 10, since the motor 51 is disposed outside the outer end portion 34a of the bent portion of the hairpin tube 34, it is possible to suppress the dew condensation water that has adhered to the hairpin tube 34 and drips from dropping onto the motor 51.

(2) As shown in fig. 5, the main body of the motor 51 is preferably arranged such that the inner end 50x is spaced apart from the side plate 32 and the outer end is spaced apart from the exterior member of the casing. Thus, the air conditioner 10 can suppress the transmission of vibration of the motor 51 to the decorative frame 22 and the generation of noise when the motor 51 is driven. In the example shown in fig. 3, the motor 51 may be disposed such that the inner end 50x of the motor 51 is separated from the side plate 32 and the outer end is separated from the exterior member of the cabinet.

(3) As shown in fig. 6A and 6B, the drain pan 39 is disposed below the heat exchanger 31 and the motor cover 60 so as to extend to the outside of the inner end portion of the motor cover 60. That is, the drain pan 39 is disposed below the heat exchanger 31 and the motor cover 60, and an end of the drain pan 39 is located outside the inner end of the motor cover 60. This allows the air conditioner 10 to reliably receive the dew condensation water that has adhered to and dropped from the motor cover 60 by the drain pan 39.

(4) As shown in fig. 6B, the lower portion of the motor cover 60 is preferably an inclined portion that descends from the outer end portion side toward the inner end portion side. Thus, the air conditioner 10 can cause the lower surface of the lower portion of the motor cover 60 to function as the flow path R11 for dew condensation water adhering to the motor cover 60. Therefore, the air conditioner 10 can guide the dew condensation water adhering to the motor cover 60 to the drain pan 39 and can receive the dew condensation water efficiently and reliably by the drain pan 39.

(5) As shown in fig. 6C, the entire motor cover 60 is preferably disposed inside the outer end portion of the drain pan 39. This allows the air conditioner 10 to reliably receive the dew condensation water that has adhered to and dropped from the motor cover 60 by the drain pan 39.

(6) As shown in fig. 3, the air conditioner 10 preferably includes a protruding portion 32p formed to protrude from the outer surface of the side plate 32 so as to cover the upper side of the inner end portion of the motor 51. The projection 32p functions as a dew condensation preventing mechanism for suppressing the adhesion of dew condensation water to the motor 51. This makes it possible for the air conditioner 10 to prevent dew condensation water that has adhered to the hairpin tube 34 and drips from falling onto the motor 51.

(7) As shown in fig. 4, a groove 62 for accommodating the lead wire 53 of the motor 51 is preferably formed in a lower portion of the motor cover 60. The motor cover 60 can be accommodated in the accommodation portion 61 so as not to apply a load to the lead wire 53 by passing the lead wire 53 through the groove 62. In the motor cover 60, the lead wire 53 is drawn out through a groove 62 provided in a lower portion of the inner peripheral surface of the housing portion 61, and the lead wire 53 can be disposed so that the lead wire 53 passes below the rotary shaft 52. Thus, for example, if dew condensation water drops toward the direction of the lead wire 53, the motor cover 60 can also dispose the lead wire 53 in a direction in which dew condensation water is less likely to stick. Such a motor cover 60 can suppress adhesion of dew condensation water to the lead 53, and thus can reduce the failure rate of the motor.

(8) As shown in fig. 4, the main body of the motor 51 is preferably covered with a heat insulator 54. This can prevent the air conditioner 10 from generating dew condensation water due to excessive cooling of the motor 51 and from adhering to the motor 51.

(9) As shown in fig. 8 to 10, the brush 41A (cleaning part) is preferably provided with a non-flocked area 43b in which the fiber part 42 is not flocked, at one or both ends of the brush base part 43 (base part). The non-flocked area 43b may be provided so as to extend from the outside to the inside of the side plate 32. Accordingly, when the air conditioner 10 rotates the brush 41A during cleaning of the blower fan 38, the fiber portion 42 can be prevented from coming into contact with the side plate 32 of the heat exchanger 31 at one or both ends of the brush 41A. Therefore, the air conditioner 10 can reduce the load applied to the brush 41A when the brush 41A is rotated. In addition, the air conditioner 10 can make the brush 41A less prone to becoming dirty.

(10) As shown in fig. 8 to 10, an end portion of the brush base portion 43 of the brush 41A preferably protrudes outward from an end portion of the shaft 45 as a grip portion 43 c. Accordingly, in the air conditioner 10, since the operator can grip the grip portion 43c, the brush 41A can be easily removed from the lateral space of the heat exchanger 31 when replacing the brush 41A.

As described above, according to the air conditioner 10 of embodiment 1, the adhesion of dew condensation water to the main body of the motor 51 of the fan cleaning device 40 can be suppressed.

[ embodiment 2]

The motor cover 60 of the motor assembly 50 (see fig. 3 and 4) according to embodiment 1 is formed of a single member.

In contrast, in embodiment 2, there is provided a motor unit 50A (see fig. 11 to 13) in which the motor cover 60 is formed of a plurality of (e.g., 2) members.

The structure of the motor unit 50A of embodiment 2 will be described below with reference to fig. 11 to 12. Fig. 11 is a schematic diagram showing the structure of the motor unit 50A. Fig. 12 is an exploded view showing the structure of the motor unit 50A. Fig. 13 is a schematic sectional view showing an internal structure of the motor assembly 50A.

As shown in fig. 11, a motor unit 50A according to embodiment 2 is different from the motor unit 50 (see fig. 3) according to embodiment 1 in that the motor cover 60 is constituted by 2 members, i.e., a1 st motor cover 71 and a2 nd motor cover 72. Here, the 1 st motor cover 71 is a member on the side (outer side) away from the side plate 32 of the heat exchanger 31, and the 2 nd motor cover 72 is a member on the side (inner side) close to the side plate 32 of the heat exchanger 31. In the example shown in fig. 11, the spacer 69 shown in fig. 5 is not used, but the motor unit 50A may be attached to the side plate 32 of the heat exchanger 31 via the spacer 69 shown in fig. 5.

As shown in fig. 12, the 1 st motor cover 71 includes a housing portion 61 that houses an outer portion of the main body of the motor 51, and a fixing portion 66 that is connected to the side plate 32 of the heat exchanger 31 and the like by a screw 65. A groove 62 for accommodating the lead 53 of the motor 51 is formed in a lower portion of the inner peripheral surface of the accommodating portion 61. The groove 62 is formed so as not to penetrate the inner wall surface (left wall surface in fig. 12) of the housing portion 61.

On the other hand, the 2 nd motor cover 72 has a housing portion 61a that houses an inner portion of the main body of the motor 51 and a fixing portion 66a that is coupled to the 1 st motor cover 71 by a screw 55. In a lower portion of the inner peripheral surface of the housing portion 61a, a groove 62a for housing the lead wire 53 of the motor 51 is formed, similarly to the housing portion 61 of the 1 st motor cover 71. The groove 62a is formed to penetrate through an inner wall surface (a right wall surface in fig. 12) of the housing portion 61 a.

The groove 62 of the 1 st motor cover 71 and the groove 62a of the 2 nd motor cover 72 are configured to communicate with each other. The lead wire 53 of the motor 51 is drawn out to the outside of the motor cover 60 through the groove 62 of the 1 st motor cover 71 and the groove 62a of the 2 nd motor cover 72.

The motor assembly 50A is assembled as follows. First, a band-shaped heat insulator 54 is wound around the outer periphery of the main body of the motor 51 (see hollow arrow a 21). Next, the motor 51 around which the heat insulator 54 is wound is housed in the housing portion 61 of the 1 st motor cover 71 (see hollow arrow a 22). At this time, the lead wire 53 of the motor 51 is drawn out to the outside of the 1 st motor cover 71 through the groove 62 of the 1 st motor cover 71. Next, the motor 51 is housed in the housing portion 61a of the 2 nd motor cover 72 (see hollow arrow a 23). At this time, the lead wire 53 of the motor 51 is drawn out to the outside of the 2 nd motor cover 72 through the groove 62a of the 2 nd motor cover 72. Thus, the motor assembly 50A is assembled.

Fig. 13 shows a schematic side sectional structure of the motor unit 50A. Fig. 13 shows the motor 51 without the lead 53. As shown in fig. 13, the motor unit 50A is attached to the side plate 32 in a state where the entire periphery of the motor 51 is sealed by the 1 st motor cover 71 and the 2 nd motor cover 72. This motor unit 50A can efficiently suppress the adhesion of dew condensation water to the motor 51.

As described above, according to embodiment 2, as in embodiment 1, adhesion of dew condensation water to the main body of the motor 51 of the fan cleaning device 40 can be effectively suppressed.

The technical scope of the present invention is not limited to the above-described embodiments, and various modifications and variations can be made without departing from the scope of the present invention.

For example, the above embodiments are described in detail to explain the gist of the present invention in an easily understandable manner. Therefore, the present invention is not limited to the configuration having all the components described. In the present invention, other components may be added to the components, or some of the components may be changed to other components. In addition, the present invention can delete a part of the constituent elements.

For example, the motor unit 50A (see fig. 11 to 13) of embodiment 2 described above can be modified as in modifications 1 to 4 shown in fig. 14 to 17.

< modification 1 >

Fig. 14 is a schematic diagram showing an internal structure of a motor unit 50B of modification 1. As shown in fig. 14, a motor unit 50B of modification 1 is different from the motor unit 50A of embodiment 2 (see fig. 11 to 13) in the following portions.

(1) The 1 st motor cover 71 has a fixing portion 101 connected to the 2 nd motor cover 72 by a screw 111.

(2) The 2 nd motor cover 72 has a fixing portion 102 connected to the side plate 32 by a screw 112.

Like the motor unit 50A (see fig. 11 to 13) of embodiment 2, the motor unit 50B of modification 1 can efficiently prevent dew condensation water from adhering to the main body of the motor 51 of the fan cleaning device 40. The motor 51 is housed in the 1 st motor cover 71 and the 2 nd motor cover 72.

< modification 2 >

Fig. 15 is a schematic diagram showing an internal structure of a motor unit 50C according to modification 2. As shown in fig. 15, a motor unit 50C according to modification 2 is different from the motor unit 50B according to modification 1 (see fig. 14) in the following portions.

(1) The motor cover 60 is constituted only by the 1 st motor cover 71.

(2) The side plate 32 includes an abutting portion 32Z formed to protrude in a screw-like projecting manner on the outer surface of the side plate 32 so as to abut on the inner end portion of the motor cover 60.

The motor module 50C of modification 2 can reduce the number of parts of the motor cover 2 72 as compared with the motor module 50B of modification 1 (see fig. 14). The motor cover 60 and the contact portion 32Z (screw thread protrusion) are preferably configured to cover at least the entire upper side of the main body of the motor 51. Thus, the motor unit 50C of modification 2 can effectively prevent dew condensation water from adhering to the main body of the motor 51 of the fan cleaning device 40.

< modification 3 >

Fig. 16 is a schematic diagram showing an internal structure of a motor unit 50D according to modification 3. As shown in fig. 16, a motor unit 50D according to modification 3 is different from the motor unit 50B (see fig. 14) according to modification 1 in the following portions.

(1) The 1 st motor cover 71 has a fixing portion 104 connected to the side plate 32 by a screw 111, and the fixing portion 104 is provided to protrude in a direction not overlapping with the fixing portion 102 of the 2 nd motor cover 72.

(2) The motor 51 has a fixing portion 103 connected to the 2 nd motor cover 72 by a screw 113.

(3) The 1 st motor cover 71 has a cover portion 67 covering an upper side of the fixing portion 102 of the 2 nd motor cover 72.

The motor unit 50D according to modification 3 can cause the cover portion 67 to function as a dew condensation preventing mechanism for preventing dew condensation water from adhering to the motor 51. Therefore, the motor unit 50D of modification 3 can effectively suppress the adhesion of dew condensation water to the main body of the motor 51 of the fan cleaning device 40. The cover portion 67 functions as a positioning mechanism that abuts on the side plate 32 to determine the position of the motor unit 50D. This allows the motor unit 50D to be stably arranged at a desired position.

< modification 4 >

Fig. 17 is a schematic diagram showing an internal structure of a motor unit 50E according to modification 4. As shown in fig. 17, a motor unit 50E according to modification 4 is different from the motor unit 50D according to modification 3 (see fig. 16) in the following portions.

(1) The 1 st motor cover 71 does not have the cover portion 67 (see fig. 16).

(2) However, mating surfaces of the 1 st motor cover 71 and the 2 nd motor cover 72 have overlapping (lap) structures 68 that engage with the respective surfaces.

The motor unit 50E according to modification 4 can cause the superposed structure 68 to function as a dew condensation preventing mechanism for preventing dew condensation water from adhering to the motor 51. Therefore, the motor unit 50E of modification 4 can effectively suppress the adhesion of dew condensation water to the main body of the motor 51 of the fan cleaning device 40.

Description of the symbols

10-air conditioner, 11-indoor unit, 12-outdoor unit, 13-connecting piping, 21-cabinet, 22-decorative frame (exterior member), 23-front panel, 24-air inlet, 25-air outlet, 26-up-down wind direction plate, 31-heat exchanger, 31 a-fin, 32-side panel, 32 p-protrusion, 32Z-contact part (screw thread protrusion), 34-hairpin tube, 34 a-outer end of bend, 38-air blower fan, 39-drain pan, 40-fan cleaning device, 41-brush (cleaning part), 42-fiber part, 43-brush base (base), 43 a-hair-planting region, 43 b-non-hair-planting region, 43 c-grip part, 43Z-rail part, 45-axis, 45 a-storage part, 50A-motor component, 50 x-inner end, 50 y-outer end, 50Z-mating surface, 51-motor (driving mechanism), 52-rotation axis, 53-lead wire, 54-heat insulating material, 55, 65, 111, 112, 113-screw, 56, 66, 101, 102, 103-fixing portion, 60-motor cover, 61 a-housing portion, 62 a- (groove for lead wire drawing), 67-cover portion (positioning mechanism), 68-overlapping structure, 69-spacer, 71-1 st motor cover, 72-2 nd motor cover.

Claims

1. An air conditioner is characterized in that,

the disclosed device is provided with:

a heat exchanger;

an air supply fan;

a cleaning part for cleaning the air supply fan;

a motor disposed outside the side plate of the heat exchanger and driving the cleaning unit;

a motor cover covering the main body of the motor; and

a drain pan for receiving the condensed water dripping from the heat exchanger,

the drain pan is disposed below the heat exchanger and the motor cover, and an end of the drain pan is located outside an inner end of the motor cover.

2. The air conditioner according to claim 1,

the motor is arranged such that an inner end portion is separated from the side plate and an outer end portion is separated from an exterior member of the casing.

3. The air conditioner according to claim 1,

the motor is provided with a protruding part which is formed by protruding on the outer surface of the side plate in a mode of covering the upper part of the inner end part of the motor.

4. The air conditioner according to claim 1,

the cleaning part has a base part implanted with a fiber part,

the end of the base is provided with a region where the fiber part is not flocked.

5. The air conditioner according to claim 4,

the area where the fiber part is not flocked is provided so as to extend from the outside to the inside of the side plate.

6. The air conditioner according to claim 1,

the lower portion of the motor cover is an inclined portion that descends from an outer end portion side toward an inner end portion side.

7. The air conditioner according to claim 1,

the entire motor cover is disposed inside the outer end of the drain pan.

8. The air conditioner according to claim 1,

a groove for accommodating a lead wire of the motor is formed in a lower portion of an inner peripheral surface of the motor cover.

9. The air conditioner according to claim 1,

the motor includes a heat insulating material covering a peripheral surface of a main body of the motor.

10. The air conditioner according to claim 1,

the side plate includes an abutting portion formed to protrude from an outer surface of the side plate so as to abut on an inner end portion of the motor cover,

the motor cover and the contact portion are configured to cover at least an upper portion of the entire body of the motor.

11. The air conditioner according to claim 1,

the motor control device is provided with a cover part which is formed on the motor cover in a mode of covering the upper part of the inner end part of the motor.

12. An air conditioner according to claim 11,

the cover portion functions as a positioning mechanism that abuts against the side plate to determine the position of the motor.

13. The air conditioner according to claim 1,

the motor cover is composed of a plurality of cover members,

the mating surfaces of the cover members are of an overlapping configuration.