JP2002048084A - Drain pump for air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the weight of a drain pump for air conditioner, and to simplify the assembling process therefor. SOLUTION: A DC core-less motor is used as a driving source of a pump so as to reduce the weight of the pump, and on the other hand, a through hole 27a of an output shaft 35 of a motor main body 31 is provided at a central art of a cover member 27 of a pump main body 21, and a motor guide 39 is stood around the through hole 27a, and a projection part formed in an upper cover 33a of the motor main body 31 is guided for assembling by a motor guide 39 so that centering of the output shaft 35 of the motor and the center of the pump part 29 can be automatically performed. In this process for assembling a drain pump for air conditioner, fixing tool such as a bolt is unnecessary, and the assembling process is simplified, and weight of the pump can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drain pump for draining dew condensation water from an air conditioner from an indoor unit to the outside, and more particularly to a drain pump for an air conditioner, which can be reduced in weight and simplified in assembling work. About.

[0002]

2. Description of the Related Art Conventionally, as a drain pump for an air conditioner,
A drain pump as described in Japanese Patent Application Laid-Open No. 10-306794 is known. This drain pump will be described with reference to FIG.
The pump unit 020 includes a pump unit 020 and an AC motor 050. The pump unit 020 includes a pump body 010 having a pump chamber 211, and the pump body 010 includes a suction port 012 and a discharge port 014.
And A lid member 020 is fitted to the upper part of the pump main body 010, and the lid member 020 supports the AC motor 050 via a support post 023.

The output shaft 054 of the AC motor body 050 is
It is inserted into a shaft 043 of a pump blade (impeller) 040 in the pump main body 010. The pump blade 040 has an auxiliary blade 042 and a large-diameter blade 044. Reference numeral 040 indicates a drainer, 052 indicates a coil portion of the AC motor 050, and 056 indicates the same core. Reference numeral 03
0 is an O interposed between the pump body 010 and the lid 020.
Reference numeral 060 indicates a mounting bracket.

[0004] In the above configuration, when the AC motor 050 is driven, the pump blade 040 rotates and the suction port 02 is rotated.
Drain water is sucked up from 1 and drained from the discharge port 014.
A disc-shaped drain plate 040 is provided on the output shaft 054 in order to prevent drain water from blowing out from the hole of the lid 020 (the insertion hole of the output shaft 054 of the AC motor main body 050) when stopped.

[0005]

Generally, a controller in an air conditioner tends to be a DC controller for improving efficiency. Therefore, like the conventional drain pump described above,
Efficiency cannot be improved by using an AC motor as a drive source of the pump. A pump using a DC motor has also been proposed as a drive source. However, in a motor using a DC motor instead of an AC motor, the DC motor is a stator core type DC motor. The core is mostly occupied by the core (laminated parts of iron-based sheet), and as a result, the weight of the drainage pump itself becomes heavy, so that the mounting parts also need to hold the weight and require a structure that does not resonate. There are issues.

The present invention is intended to solve such a problem, and uses a DC motor as a drive source of the drainage pump and reduces the weight of the entire drainage pump by using the DC motor as a statorless type. On the other hand, the motor cover is positioned by using the uneven portion formed on the side where the output shaft protrudes and on the opposite side to reduce the number of mounting screws, etc. It is what we are trying to figure out.

On the other hand, a DC stator coreless motor has a D
Although it is lighter than the C stator core motor, it has the disadvantage of low torque. In the present invention, the impeller for improving the pump capacity is simultaneously improved so that a sufficient drainage capacity can be obtained even at a low torque, which is a means for solving the problem.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a drain pump for an air conditioner.
A brushless motor of a DC stator coreless type, a motor body capable of accommodating the motor, and upper and lower outer surfaces of the brushless motor. Having uneven portions that are closely fitted to the uneven portions formed on the
A pump having a pair of upper and lower plate-shaped covers capable of covering substantially the entire upper and lower surfaces of the motor body, and a motor guide hole that covers the upper cover and closely fits into a convex portion of the cover; A holder having a plurality of main body engaging claws that are fitted and supported by a holder fitting portion provided on the lid member of the unit, wherein the pump unit has a direction in which the output shaft of the motor projects. A pump body having a suction port at an end of the pump body and a discharge port on a side of the motor body side than the suction port, and a DC stator coreless type brushless motor rotatably disposed in the pump body. A first problem-solving means is provided with an impeller that is driven to rotate.

According to the present invention, the driving source of the pump is DC
Since the stator coreless motor is used, it is possible to reduce the weight (about 1/2 or less of the conventional one) compared to the conventional AC shading motor, to reduce the cost of transporting the drainage pump and to reduce the weight of the attached product. Can also be achieved. Further, from the viewpoint of corelessness, the energy required to manufacture a core made of iron can be reduced, which can contribute to resource saving.

The upper and lower surfaces of the motor main body are substantially entirely covered by a pair of upper and lower plate-like covers each having a concave and convex portion which fits closely with the concave and convex portions formed on the outer upper and lower surfaces of the motor. On the other hand, the holder portion having the motor guide hole which is fitted closely into the convex portion of the upper cover is fitted to the upper cover while the motor guide hole is being fitted into the convex portion and the two members are aligned. When the main body engaging claw provided on the holder portion is fitted and supported on the holder fitting portion provided on the lid member of the pump portion, the motor output shaft and the pump shaft automatically Because of the concentricity, in the process of assembling the drain pump for the air conditioner, the alignment (axis alignment) between the motor unit and the pump unit can be omitted, and the manufacturing process can be simplified.

Further, in order to attach the lid member to the pump body, a plurality of engaging claws are provided on a peripheral wall of the pump body, and a lid engaging receiver which can be clip-engaged with the engaging claws is provided on the lid member. In this case, the lid member can be easily selected and fixed to the pump body in a relatively different mounting positional relationship.

[0012] Further, since the whole is reduced in weight, the number of screwing steps can be reduced, the installation on site can be simplified, and the vibration characteristics can be improved.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a front sectional view of a drain pump for an air conditioner according to an embodiment of the present invention, FIG. 2 is a right side view of the same, FIG. 3 is an assembled sectional view of a main part, FIG.
6 is a sectional view of the same motor, FIG. 7 is a perspective view of the motor body, FIG. 8 is a bottom view of the same use state, FIG. 9 is a perspective view of the impeller, FIG. 10 is a plan view of FIG. FIG. 12 is a side view of a part of the holder.

A drain pump 1 for an air conditioner according to this embodiment
Is composed of a DC motor unit 30 and a pump unit 20 attached below the DC motor unit 30.

The DC motor section 30 is formed of a brushless motor of a DC stator coreless type and a flat motor body 31 capable of accommodating the motor. Then, the upper and lower surfaces of the main body 31 are covered with two thin covers 33a, 33b.
Covered with. Output shaft 35 of each cover 33a, 33b
As shown in FIGS. 4 and 7, concentric concave portions and convex portions centering on the output shaft 35 are formed on the surface on which is projected and the opposite surface (rear surface), respectively. And the motor body 3
A convex portion 32 and a concave portion 34 are formed on the covers 33a and 33b for aligning the cover 1 with the covers 33a and 33b.

After the above alignment, the upper and lower covers 33
By tightening the bolts 7 between a and 33b, a drain pump for an air conditioner in which the motor body 31 is covered with the covers 33a and 33b can be easily assembled, and the ease of manufacture can be improved.

The pump body 20 constituting the pump section 20 is provided with a suction port 22 at the end of the motor body 31 in the direction in which the output shaft 35 protrudes. A discharge port 24 is provided on the side surface. The impeller 40 shown in FIGS. 9 to 11 is rotatably arranged inside the pump body 21 to constitute the drain pump 1 for an air conditioner.

The impeller 40 includes a shaft portion 43 connected to the output shaft 35 of the motor, and a plurality of blade members 44 extending in the axial direction of the shaft portion 43 and having an inner end located away from the shaft portion 43. And a plate-shaped auxiliary blade 45 attached below the shaft portion 43 along the axial direction of the shaft portion 43 and a hollow between the auxiliary blade 45 formed and connected to each lower end of each blade member 44. A drain guide surface 47 having a portion 46, and each blade member 44
A ring-shaped drain water straightening ring 42 is disposed on the outer peripheral portion of the motor at a constant radius from the rotating shaft 35 of the motor. A plurality of drain water guide portions 41 are formed at a predetermined interval in the drain water straightening ring 42 and have inclined surfaces.

A cover member 27 for closing the motor-side opening of the pump body 21 is attached to the periphery of the motor-side opening, and between the periphery of the motor-side opening and the cover member 27 as shown in FIG. , An O-ring 29 are interposed.

In order to attach the cover member 27 to the pump body 21, an upward engaging claw 26 is provided on the peripheral wall of the pump body 21.
As shown in FIG. 1, they are arranged facing each other at 180 ° intervals.
On the other hand, on the lid member 27, lid engagement receivers 28 which can be clip-engaged with the engagement claws 26 are formed at 90 ° intervals as shown in FIGS. Therefore, as shown in FIG. 8, the lid member 27 can be easily selected and fixed to the pump body 21 at four 90-degree relatively different mounting positions every 90 degrees. With this configuration, at the time of the installation work of the drain pump for the air conditioner, the direction of the discharge port 22 can be easily aligned with the drain pipe of the installation destination, and the efficiency of the installation work can be increased.

A pair of holder-fitting portions 25 are provided upright at 180 ° intervals on both sides of the lid member 27 on the motor body side.
Each holder-fitting portion 25 has a pair of body engaging claws 5 described later.
One insertable narrow groove is formed. A pair of motor guides 39 are provided upright on the upper surface of the lid member 27. Each of the motor guides 39 has an arc-shaped cross section having the same dimension as the diameter of the protrusion 22 formed to project from the cover 33b. The protrusion 22 formed on the motor guide 39 so as to protrude from the cover 33b.
Is inserted, the motor section 31 is guided by the guidance of the motor guide 39, and the output shaft 35 of the motor is automatically arranged at the center of the pump section. A drain plate 36 is attached to the output shaft 35 of the motor.

Further, an output shaft 35 is provided at the center of the lid member 27.
The motor guide 39 is provided upright around the hole 27a. A support 25a of the holder-fitting portion 25 is provided outside each motor guide 39.
Is erected.

The upper surface of the upper cover 33a is almost entirely covered with a plate-shaped holder 50. The holder 50 has a circular motor guide corresponding to the convex portion formed on the upper cover 33a. A hole 52 is formed. Further, a pair of main body engaging claws 51 are provided on both right and left side edges of the holder portion 50.
Is projected downward. Almost the entire upper surface of the upper cover 33a is covered by the plate-shaped holder unit 50. A circular motor guide hole 52 is formed in the holder portion 50 so as to be closely fitted to a convex portion formed on the upper cover 33a. Further, a pair of main body engaging claws protruding downward and elongated from the elastic engaging portion 50a are formed on the bottom edges on both left and right sides of the holder portion 50. Reference numeral 55 denotes a mounting hole of a bracket for mounting the drain pump for the air conditioner.

As described above, the motor main body 31 is driven by the motor guide 39 so that the output shaft 35 of the motor is connected to the pump section 2.
The center of the motor body 31 is automatically aligned with the center of the motor body 31 and the pair of main body engaging claws 51 of the holder part 50 is inserted into the holder fitting part 25 formed on the pump main body 21 so that the motor body 31 And the pump body 21 are automatically aligned. Therefore, in the assembling process of the drain pump for the air conditioner, it is not necessary to use a fixing tool such as a bolt, and the assembling process can be simplified and reduced in weight.

The impeller 40 of the pump is provided with a plurality of blade members 44 and auxiliary blades 45, and drain water is sucked up by the auxiliary blades 45 during rotation. Since the blade member 44 is provided at an interval from the shaft 43, it is possible to prevent the free surface formed in the pump body 21 from being disturbed by the plurality of blade members 44. Since the area in contact with the fluid is reduced, the load can be reduced. Further, the inclined surface of the drain water guide portion 41 allows the drain water to move upward in the pump chamber to be drained smoothly, and a sufficient pump capacity can be secured. In this manner, the drain pump for an air conditioner according to this embodiment can provide a sufficient drainage capacity even at a low torque, and the DC stator coreless motor has a weak point that the torque is small. Can be compensated for by improving

[0026]

As described above, according to the present invention, the following effects can be obtained. (1) At the time of assembly, the motor body is guided by a motor guide, so that the axis of the output shaft 35 of the motor and the center of the pump section are automatically aligned, and a pair of body sections of the holder section are engaged. The assembly process of the drain pump for air conditioner is performed by inserting the dowel into the holder fitting part formed in the pump body, so that the motor body and the pump body are automatically aligned. In addition to the above, the "centering" work can be omitted, and a fixing tool such as a bolt is not required, so that the assembling process can be simplified and the weight of the drain pump for the air conditioner can be reduced. (2) Drain water is sucked up by the auxiliary impeller of the pump impeller, and the free surface formed in the pump main body at the interval formed between the impeller member and the shaft is disturbed by the plurality of impeller members. Can be suppressed, and the area of the blade member in contact with the fluid can be reduced, so that the load can be reduced. Furthermore, the inclined surface of the drain water guide portion allows the drain water to move upward in the pump chamber to be smoothly drained, and as a result, the weak point that the torque of the DC stator coreless motor is small is reduced by reducing the shape of the impeller. Improvements can make up for it. (3) Since a DC stator coreless motor is used as the drive source of the pump, it is possible to reduce the weight (about 1/2 or less of the conventional one) as compared with the conventional AC shading motor, and to transport the drainage pump. In this case, the cost can be reduced, and the weight of the attached product can be reduced. Further, the coreless configuration requires less energy for manufacturing the iron core, which can contribute to resource saving. (4) In order to attach the lid member to the pump main body, a plurality of engaging claws are provided on the peripheral wall of the pump main body, and a lid engaging receiver that can be clip-engaged with the engaging claws is provided on the lid member. The lid member can be easily selected and fixed to the pump body at relatively different mounting positions.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a drain pump for an air conditioner as one embodiment of the present invention.

FIG. 2 is a right side view of the same.

FIG. 3 is an assembled sectional view of a main part.

FIG. 4 is a plan view of the same.

FIG. 5 is a bottom view of the same.

FIG. 6 is a sectional view of the same.

FIG. 7 is a perspective view of the motor body.

FIG. 8 is a bottom view of the same use state.

FIG. 9 is a perspective view of the impeller.

FIG. 10 is a plan view of the same.

FIG. 11 is a side view of the same.

FIG. 12 is a side view of a part of the holder.

FIG. 13 is a front sectional view of a conventional drain pump for an air conditioner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 DC pump 20 Pump part 21 Pump body 22 Suction port 24 Discharge port 25 Holder fitting part 26 Engagement claw 27 Lid member 27a Through hole 28 Lid engagement receiver 30 DC motor part 31 DC motor main body 32 Convex part 33a Upper cover 33b Lower cover 34 Concave part 35 Output shaft 36 Drain plate 37 Terminal part 40 Impeller 41 Drain guide part (inclined surface) 42 Drain water straightening ring 43 Shaft part 44 Blade member 45 Auxiliary blade 46 Hollow part 47 Drain guide surface 50 Holder part 51 Main body Engagement claw 52 Motor guide hole 53 Bracket mounting hole

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) // F24F 1/00 361 F24F 1/00 361F (72) Inventor Masahiko Yoshida 535 Sasai, Sayama City, Saitama Prefecture Sagimiya Manufacturing Co., Ltd. F-term (reference) at Sayama Plant 3H022 AA01 BA04 CA50 DA07 3H033 AA01 AA18 BB01 BB06 CC01 CC04 DD06 DD21 EE05 EE12 3L050 BF02 5H607 AA00 BB01 BB09 CC05 FF06

Claims (5)

[Claims] 1. A drain pump for an air conditioner, comprising:
A motor unit and a pump unit mounted below the DC motor unit; the DC motor unit includes a DC stator coreless brushless motor, a motor body capable of housing the motor, and upper and lower outer surfaces of the brushless motor. A pair of upper and lower plate-shaped covers, each of which has a concave-convex portion that closely fits into the concave-convex portion formed on the upper surface, and is capable of covering substantially the entire upper and lower surfaces of the motor body, respectively; And a plurality of main body engaging claws which are fitted and supported by a holder fitting portion provided on a lid member 27 of a pump portion, which will be described later. A pump having a suction port at an end in a direction in which the output shaft of the motor protrudes, and a discharge port on a side of the motor body side of the suction port. Body and, the pump is rotatably disposed within the body the DC stator coreless type air conditioner for a drainage pump which is characterized by comprising an impeller which is rotatably driven by a brushless motor. 2. The drain pump for an air conditioner according to claim 1, wherein a lid member for closing a motor-side opening of the pump body is attached to a periphery of the motor-side opening. An upward engaging claw is provided on a peripheral wall of the pump body for attachment to the pump body, and a lid engaging receiver that can be clip-engaged with the engaging claw is formed on the lid member, and a peripheral edge portion of the lid member is provided. A drain pump for an air conditioner, further comprising a plurality of holder-fitting portions each capable of inserting a plurality of main body engaging claws provided on the holder portion. 3. The drain pump for an air conditioner according to claim 1, wherein the impeller has a shaft portion connected to an output shaft of the motor, and the impeller extends in an axial direction of the shaft portion. A plurality of blade members each having an extended inner end located away from the shaft portion; a plate-shaped auxiliary blade attached along the axial direction of the shaft portion below the shaft portion; A drain guide surface having a hollow portion formed between the lower end portion and the auxiliary blade, the drain guide surface having a hollow portion, and a ring-shaped drain on an outer peripheral portion of each of the blade members at a constant radius from a rotation axis of the motor. A drain pump for an air conditioner, wherein a water flow regulating ring is provided, and an inclined surface constituting a plurality of drain water guide portions is formed at a predetermined interval on the drain water flow regulating ring 42. 4. The drain pump for an air conditioner according to claim 1, wherein the cover member has a through hole for an output shaft of the motor, which is opened at a central portion. , A motor guide having an arc-shaped cross section having the same dimension as the diameter of the protrusion formed on the cover is erected, and a column of the holder-fitting portion is erected outside the motor guide. Drain pump for air conditioner. 5. The drain pump for an air conditioner according to claim 1, wherein the holder is configured to fix the motor main body to the pump main body. It has two or more main body engaging claws that are fitted and supported in two or more holder-fitting portions formed on the member, and has a guide hole for positioning using the uneven portion of the motor main body as a guide. Then, using the concave portion of the concave-convex portion of the motor body, an external mounting bracket is formed with a screw portion 4 for mounting the air conditioner drain pump via the holder portion via the holder portion. pump.