JP2600177Y2 - Motor cooling fan of drain drain pump for indoor unit of air conditioner - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to an indoor unit of an air conditioner.
The present invention relates to a motor cooling fan for driving a drain drain pump for a motor.

[0002]

2. Description of the Related Art In an indoor unit of an air conditioner, since water condensed on the surface of an evaporating heat exchanger drops, the water drops are received by a drain pan and discharged to the outside by a drain pump. The drainage pump is driven by a motor,
This drainage pump unit is arranged in an empty space in the casing of the indoor unit.

[0003]

In such a drain pump, the drain pump is disposed in an appropriate space in the casing of the indoor unit. A drain pump that is disposed at the lower part, that is, substantially at the bottom of the indoor unit, and that drains the drain of the drain pan, is disposed immediately above the drain pan. Further, the motor for driving the drainage pump is disposed above the drainage pump because it is necessary to drive the shaft of the pump blade extending upward. Therefore, the motor of the drain pump is necessarily arranged at a position adjacent to the evaporator, and the evaporator is easily affected by the heat generated by the motor. The capacity is reduced, which causes a decrease in the cooling capacity of the air conditioner.

On the other hand, in the case of a drain drain pump, it is necessary to reduce the size of the entire drain pump unit including the motor due to the demand for downsizing of the indoor unit. There is.
In addition, the capacity of the drainage pump limits the arrangement of the indoor units in the room, and the greater the pumping capacity, the greater the degree of freedom of the arrangement. There is a demand for higher torque.

[0005] Therefore, it is desirable to obtain the drain pump unit as large as possible with the current size, and to reduce the heat generated from the motor and the influence on the evaporator even if the capacity is large. It is. In addition, the drain pump unit has been made smaller than it is now to achieve the same performance and is inexpensive, and the entire indoor unit has been made smaller and more compact, and the heat generated by the motor has been reduced to improve the performance of air conditioners. It is also desired to measure.

Accordingly, the present invention reduces the effect on the evaporator by reducing the temperature rise of the motor in spite of its small size and high torque, thereby reducing the influence on the evaporator.
The purpose is to improve the ability .

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a blade rotating in a pump chamber having an air gap.
A drain drain pump for indoor units of air conditioners, which has a drain plate on the motor rotation shaft between the motor adjacent to the evaporator
A cooling fan configured to generate an air flow from the motor to the drain plate on the motor rotation shaft above the drain plate and below the motor,
As a result, despite the small size and high torque, the motor temperature rise is reduced and the effect on the evaporator is reduced.
In this case, the capacity of the air conditioner is improved .

[0008]

The present invention is constructed as described above. When the drain pump is driven by driving the motor, the fan fixed to the motor rotating shaft rotates the rotor, and the air flow generated by the fan passes through the motor. The motor is cooled ,
Reduce the effect on the evaporator adjacent to the motor, and
Ability is improved .

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the drain generated on the surface of the evaporator in the indoor unit of the air conditioner is collected in a lower drain pan (not shown), and the drain of the drain pan is drained by a drain pump 1.
When the blade 3 in the pump body 2 is rotated by the motor 4 , the air is sucked from the suction port 5 at the lower part of the pump body 2 , and the air gap is formed.
Into the pump chamber 6 having The drain in the pump chamber 6 is agitated by the rotation of the blades 3 and given kinetic energy, and the drain enters a discharge path 7 provided on the outer periphery of the pump chamber 6 and is converted into a dynamic pressure by the kinetic energy. The drain of the discharge path 7 is guided upward from the drain port 8 and discharged to the outside by an appropriate drain hose 10.

A motor 4 for rotating the blades 3 is supported and fixed on a plurality of columns 11 projecting from the upper surface of the pump body 2.
The rotating shaft 12 for fixing the blade 3 to the tip is provided with bearings 13 and 14.
Supported by. A cooling fan 16 is fixed to the rotating shaft 12. In addition, as means for fixing the cooling fan 16 to the rotating shaft 12, means such as screwing can be adopted. or,
A drain plate 24 is provided on the motor rotation shaft 12 between the blade 3 and the motor 4 and below the cooling fan 16.

As shown in FIG. 2, the cooling fan 16 is provided with an umbrella-shaped guide 18 on the outer periphery, and a ventilation port 20 is formed in the upper center of the guide 18. A plurality of blades 21 are provided between the inner periphery of the guide 18 and the center boss 17, and the blades 21 extend in parallel with the center axis of the boss 17 in the figure to constitute a centrifugal wing. Therefore, the rotating shaft 12 of the motor 4
When the fan rotates, the cooling fan 16 rotates and the cooling fan 1
When the air inside 6 is pushed into the inner circumference of the guide 18 by centrifugal force, it flows downward in the figure along the inner circumference of the guide 18, whereby cold air is introduced from the upper central ventilation port 20, as shown in FIG. The airflow indicated by the arrow shown in FIG.

When the motor 4 is operated to rotate the rotary shaft 12 during operation of the drain pump, the blades 3 rotate in the pump chamber 6 to draw up the drain in the drain pan from the suction port 5, and To the discharge path 7, the dynamic pressure is changed to static pressure, and discharged from the drain port 8 to the outside via the drain hose 10. At this time, the cooling fan 16 fixed to the rotating shaft 12
Also rotates to form an air flow as shown by the arrow in the figure. This air flow flows through the winding portion and the iron core portion in the motor 4 through the outer periphery of the motor 4 and an appropriate ventilation hole, and performs a cooling operation of the motor 4.

In the above embodiment, as shown in FIG. 3, a spring pin 28 is inserted into the cooling fan 16 through a through hole 27 formed in the rotary shaft 12 corresponding to a receiving groove 26 formed in the upper part of the boss 25. And an E-shaped retaining ring 29 on the lower surface of the boss 25.
And fitted into an E-shaped retaining ring insertion groove 30 provided on the rotating shaft 12, and a spring pin 28 and an E-shaped retaining ring 29 are fitted.
Thus, the positioning of the cooling fan 23 with respect to the rotating shaft 12 and the rotation stop may be performed. In addition, drainer 2
The pump body 4 and the motor 4 are screwed to the pump body 2 and the motor 4 with screws 32, and the blades 3 are fixed to the rotating shaft 12 with an adhesive, a pin or the like, and assembled.

The cooling fan may be of various shapes, and may be a centrifugal fan or an axial fan with blades inclined in the axial direction.

[0015]

[Effects of the Invention] The present invention is constructed and operated as described above, so that the motor for driving the drain pump can be effectively cooled, and the heat to the various devices such as the evaporator around the motor is provided. Can be prevented. As a result, more current can flow through the motor, and therefore the torque of the motor can be increased, so that the capacity of the drain pump is improved, and it is possible to drain to a higher position. The degree of freedom of the installation position increases. Also, if the capacity of the drain pump is the same as that of the conventional one, the motor can be downsized, not only inexpensive, but also can be stored in a small space,
Equipment for installing the drainage pump can be downsized.

[Brief description of the drawings]

FIG. 1 is a side view showing a partial cross section of an embodiment of the present invention.

FIG. 2 is a bottom perspective view of the cooling fan portion.

FIG. 3 is an exploded view of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drainage pump 2 Pump body 3 Blade 4 Motor 6 Pump room 12 Rotating shaft 16 Cooling fan 20 Vent 21 Blade 24 Drain plate

Continued on the front page (72) Katsuya Taguchi 535 Sasai, Sayama-shi, Saitama Prefecture Inside Sagimiya Seisakusho Sayama Works (72) creator Akira Kasutani 535 Sasai, Sayama-shi, Saitama Prefecture Sagimiya Seisakusho Sayama Works (56 References Japanese Utility Model Sho 58-41036 (JP, U) Japanese Utility Model Sho 62-74187 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) F04D 29/58 F04D 11/00

Claims (1)

(57) [Scope of request for utility model registration] A drain drain pump for an indoor unit of an air conditioner , wherein a drain plate is provided on a motor rotation shaft between a blade rotating in a pump chamber having a gap and a motor adjacent to the evaporator.
In the motor cooling fan of the drainage pump, characterized in that a cooling fan that causes the deflector board air flow directed from the motor to the motor rotating shaft below the motor to the deflector board a upper.