JP2000229198A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent damage to the insulation of a motor even when water is leaked from the pump case of a feed water pump provided in a machine. SOLUTION: A feed water pump 48 is constituted by arranging a motor 58 to drive pump blades 65 to rotate at an upper part of a pump case 51. By this constitution, even when water is leaked form the pump case 51 and flows down onto the outer surface of the pump case 51, the motor 58 is not at a location to which the water flows down (not below the water), and the water that has flown down does not come into contact with the motor 58. In addition, even when the water that has flown down reaches the surface to which the feed water pump 48 is installed to raise the level of water, water does not easily infiltrate into the part of the motor 58 on the other hand.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine having a water pump inside the machine.

[0002]

2. Description of the Related Art In recent years, washing machines provided with a water supply pump in the machine have been provided. This water pump is
It is for supplying water outside the machine, for example, the remaining hot water from the bath, into the washing tub inside the machine, and is specifically configured as shown in FIGS. 6 and 7.

[0003] First, a pump case 1, which forms the outer shell of a water supply pump, is horizontally moved left and right.
And an anti-motor side case 3 which are assembled together via a packing 4 and are watertightly tightened by a plurality of screws 5 (see FIG. 7). A motor chamber 6 is formed in the lower part of the motor-side case 2, and the motor chamber 6 is laterally open and has an open left end. The motor chamber 6 accommodates the motor 7 from the left end of the motor chamber 6 in a horizontal axis direction with the rotating shaft 8 in the horizontal direction. Is provided with a cap 9. Note that a connection line 10 of the motor 7 is led out of the cap 9.

On the other hand, a hollow motor support 11 is formed in the back of the motor chamber 6.
The bearing housing part 12 of the motor 7 is supported by this. A plurality of holes 13 are formed in the periphery of the motor support portion 11, and the rotation shaft 8 of the motor 7 is located at the center of the inside. A pump blade 14 is attached to the rotating shaft 8 of the motor 7, and the pump blade 14 and the inside of the motor support 11, and thus between the motor chamber 6, are sealed by a seal 15 in a watertight manner. Furthermore,
A pump casing 16 is formed in the motor-side case 2 around the portion where the pump blades 14 are located, and a plurality of water outlets 17 are formed in the bottom of the motor chamber 6.
Are formed.

On the other hand, the non-motor side case 3 has
In the upper central portion of the right end, a suction port 18 is provided.
And a suction passage 19 extending downward from the suction passage 18, and a strainer 20 is provided in the suction port 18 of the suction passage 19. The distal end of the suction passage 19 is opened laterally (leftward), and a check valve 21 is provided at the distal end of the suction passage 19 for normally closing the opening. Further, a portion where the check valve 21 is provided is surrounded by an enclosure wall 22 to form a suction chamber 23, and the suction chamber 23 (the enclosure wall 2).
2) between the pump casing 16 of the motor-side case 2 and a portion facing the pump blade 14,
The partition plate 25 having the following.

Then, a portion excluding the motor chamber 6 and the pump casing 16 in the motor side case 2, and a suction port 18, a suction passage 19 and a suction chamber 2 in the non-motor side case 3.
3, a discharge chamber 26 is formed. A discharge port 27 and a priming suction port 28 are formed in front and rear portions of the right end of the non-motor side case 3 communicating with the discharge chamber 26. Have been.

With this configuration, the discharge port 27 faces a water supply passage for supplying water into a washing tub (not shown), and the priming water suction port 2 is provided.
A priming water supply pipe (not shown) connected to the water supply valve is connected to 8. Then, a water suction hose (also not shown) connected to an external water source such as in the bathtub of the bath is connected to the suction port 18, and the pump water supply process is started in this state. Then, first, when the water supply valve is opened, priming water is supplied from the water supply valve to the discharge chamber 26 of the water supply pump through the priming water supply pipe. The priming water supplied to the discharge chamber 26 passes through an outlet (not shown) of the pump casing 16 and reaches the inside of the pump casing 16.
And the inside of the discharge chamber 26 is filled.

Next, when the motor 7 is started, the pump blades 14 are driven to rotate, and water in the pump casing 16 and the suction chamber 23 is discharged from the outlet of the pump casing 16 into the discharge chamber 26. Thereby, the suction chamber 23 becomes a negative pressure. Accordingly, the check valve 21 is opened as shown by a two-dot chain line in FIG. 6, and the water of the external water source such as in the bath tub is supplied through the suction hose and the suction port 18 to the suction passage 19.
And into the suction chamber 23. Then, the inflowing water is discharged into the discharge chamber 26 by the pump blade 14,
The water is supplied from the discharge port 27 into the washing tub through a water supply path for supplying water into the washing tub.

[0009]

In the case of the above, for example, when water leaks from the discharge chamber 26 of the pump case 1, especially from the upper part thereof due to deterioration of the packing 4, etc.
The water may flow down the outer surface of the pump case 1 and reach the motor 7 below, which may impair the insulation of the motor 7. Also, even if the water flowing down the outer surface of the pump case 1 does not directly enter the motor 7 portion, if the water level rises over the surface on which the water supply pump is installed, the motor 7 There is a great possibility that it will penetrate into the portion, and there is also a possibility that the insulation of the motor 7 may be impaired.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and therefore has as its object to reduce the risk of damaging the insulation of a motor even if water leaks from a pump case of a water supply pump provided in the machine. There is no washing machine to offer.

[0011]

Means for Solving the Problems To achieve the above object, a washing machine according to the present invention includes a water supply pump for supplying water outside the machine into a tub, wherein the water supply pump comprises: A motor for rotating and driving the pump blades is arranged above the pump case.

According to this, even if water leaks out of the pump case and flows down the outer surface of the pump case, the motor is at the upper part of the pump case, and there is no motor at the water flow destination (downward). Therefore, the flowing water does not touch the motor. In addition, even if the flowing water reaches the surface where the water supply pump is installed and raises the water level, on the other hand, the motor is located at the top of the pump case, and water easily enters the motor part. I will not do it.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. First, FIG. 3 shows the entire configuration of a washing machine, especially a so-called fully automatic type washing machine, in which an outer tub 32 is accommodated in an outer box 31 and an elastic suspension mechanism 33 only partially shown is shown. I support it. In the outer tub 32, an inner tub 34 is provided, and the inner tub 34 is a washing tub and a dehydration tub,
For example, it has a dehydration hole 35 at the top part in a row around the perimeter,
A stirrer 36 is provided at the lowermost portion inside.

A driving device 3 is provided at the center of the outer bottom of the outer tank 32.
7, and the drive device 37 in this case comprises a motor 38 alone. The motor 38 is, for example, an outer rotor type, and a washing shaft 39 is attached to the rotor 38a. The washing shaft 39 is inserted into the hollow dewatering shaft 40, and the rotor 3
A clutch (not shown) for transmitting and disengaging the rotational power of 8a is arranged inside the motor 38.

Further, the agitating body 36 is attached to the washing shaft 39, and the inner tub 34 is attached to the dehydrating shaft 40, whereby the agitating body 36 and the dehydrating tub 40 are selectively rotated. Is performed directly by the motor 38 to perform washing, rinsing and dehydration. In addition, a drain valve 41, a drain hose 42, and the like are provided outside and below the outer tank 32. In addition, a porous (not shown in detail) inner basket 43 is provided on the inner peripheral portion of the inner tank 34.
A rotary balancer 44 having a liquid sealing structure is attached to the inner circumference at the top of the inner tank 34.

A top cover 45 is mounted on the top of the outer box 21. The top cover 45 has a laundry entrance 46 shown in FIG. 4, and is opened and closed by, for example, a two-fold type lid 47 (see FIG. 3). A control device (not shown) such as an operation panel or a microcomputer is provided at a front portion inside the top cover 45 inside the washing machine, and a water supply is provided at a rear portion (rear portion of the washing machine). A pump 48, a water supply case 49, and a water supply valve 50 shown in FIG. 4 are provided.

Here, FIG. 1 and FIG.
The pump case 51 forming the outer shell of the water supply pump 48 is divided into a motor-side case 52 and a non-motor-side case 53 in the vertical direction in the vertical direction. They are formed by molding, they are joined via a packing 54, and a plurality of screws 55 (FIG. 2)
(See Reference).

Of the two cases 52 and 53, a motor chamber 56 is formed on the left side of the upper motor side case 52 by being separated by an internal partition wall 57.
Numeral 6 is a vertical cylinder having an open upper end. Thus, the motor chamber 56 is provided with the motor 5 from the open portion at the upper end thereof.
8 is housed, and the motor 58 is disposed above the pump case 51.

In this case, the motor 58 has, for example, an outer diameter of 70 mm or less and an axial length excluding the rotating shaft 59 of 60 mm or less. Are stored in the vertical (down) direction.
Further, the motor 58 has a connection terminal 60 on the outer side of the upper end, and the connection terminal 60 is led out from the outlet 61 formed on the outer side of the upper end of the motor chamber 56.
Is located above the pump case 51.

On the other hand, a hollow motor support 62 is formed at the bottom of the motor chamber 56.
Accordingly, the bearing housing 63 of the motor 58 is supported. A plurality of holes 64 are formed in the periphery of the motor support portion 62, and the rotation shaft 59 of the motor 58 is located at the center of the inside. A pump blade 65 is attached to a rotating shaft 59 of the motor 58, so that the pump blade 65 is located below the motor 58.

The pump blade 65 and the motor support 62
The inside of the motor chamber 56 and the motor chamber 56 are sealed by a seal 66 in a water-tight manner, and a pump casing 67 is formed in the motor-side case 52 around the portion where the pump blade 65 is located. I have. In addition, the motor room 5
A drain port 68 communicating with the outside of the motor-side case 52 (outside of the pump case 51) is formed in the outer portion of the lower portion of 6.

In addition, a suction port 69 is formed in the motor-side case 52 at the center of the upper wall of the right side so as to protrude upward by the cylindrical portion 70. 71 are installed. Also, below the inlet 69,
That is, a suction passage 73 is formed in the motor-side case 52 by being extended by the pipe portion 72.

The remaining space other than the motor chamber 56 and the suction passage 73 in the motor-side case 52 functions as a discharge chamber 74, and the discharge chamber 74 extends along the motor chamber 56. . The suction passage 73 is located inside the discharge chamber 74. Further, a discharge port 75 and a priming suction port 76 are formed in the front and rear portions of the upper portion of the right side wall of the motor-side case 52 so as to communicate with the discharge chamber 74 so as to protrude outward by cylindrical portions 77 and 78, respectively. It is formed.

On the other hand, the non-motor-side case 53 is provided with a partition plate 79 for partitioning the inside of the case 53 up and down, thereby forming a suction chamber 80 in the lower part of the non-motor-side case 53. ing. The partition plate 79 has two water passages 81 and 82, of which the water passages 8 and 82 are formed.
1 is watertightly connected to an opening at the lower end of the suction passage 73 via a packing 83, and a water passage 82 faces the pump blade 65.

Further, among them, the water inlet 81 and the suction passage 73
A check valve 84 is provided for a portion communicating with the suction port 80. The check valve 84 normally floats on the water accumulated in the suction passage 73 from the suction chamber 80 and is connected to the water passage 81 and the suction passage 73. This is a float type in which the communication part is closed, and when the suction chamber 80 becomes a negative pressure, the communication part is separated from the inside of the suction chamber 80 and opened as shown by a two-dot chain line.

In this configuration, as shown in FIG. 4, the discharge port 75 is provided with a water receiving port 85 formed in the upper part of the water supply case 49.
Is connected by a connection pipe 86, and the water supply case 49 has a water supply port 87 extending forward and facing the inside of the inner tank 34. Further, one of the two outlets of the water supply valve 50 is connected to the priming water inlet 76 by a priming water supply pipe 88, and the other outlet of the water supply valve 50 is laterally inserted into the water supply case 49. I have more.

Next, the operation of the above configuration will be described. First, a water suction hose (not shown) connected to an external water source such as in a bath tub is connected to the suction port 69 of the water supply pump 48, and in this state, the pump water supply process is started. Then, first, when the water supply valve 50 is opened, the priming water is supplied from the water supply valve 50 to the discharge chamber 74 of the water supply pump 48 through the priming water supply pipe 88. The priming water supplied to the discharge chamber 74 reaches the inside of the pump casing 67 through an outlet (not shown) of the pump casing 67, and fills the inside of the pump casing 67, the suction chamber 80, and the discharge chamber 74. .

Next, when the motor 58 is started, the pump blades 65 are driven to rotate, and water in the pump casing 67 and the suction chamber 80 is discharged from the outlet of the pump casing 67 into the discharge chamber 74. Thereby, the suction chamber 80 becomes a negative pressure. Accordingly, the check valve 84 opens the communication portion between the water inlet 81 and the suction passage 73 as shown by the two-dot chain line in FIG. 1, and water of the external water source such as in the bath tub passes through the water suction hose and the suction port 69. Inside suction passage 73 and suction chamber 8
It flows into 0. Then, the inflowing water is discharged into the discharge chamber 74 by the pump blade 65, and sequentially flows from the discharge port 75 through the connection pipe 86 and the water supply case 49, and the inner tank 34 is discharged.
Supplied within.

As described above, in this configuration, the water from the water source outside the machine, such as in the bathtub, can be supplied into the inner tub 34 by the water supply pump 48 disposed inside the machine. For example, when water leaks from the inside of the discharge chamber 74 of the pump case 51 due to, for example, deterioration of the packing 54, the water flows down the outer surface of the pump case 51 (anti-motor side case 53), but the motor 58 Is located above the pump case 51 (motor-side case 52) and is not at the downstream (downward) side of the water, so that the flowing water does not touch the motor 58.

In this case, the flowing water is supplied to the feed pump 4
Even if the water level rises to the surface on which the motor 8 is installed, the motor 58 is located at the upper part of the pump case 51, and water does not easily enter the motor 58. Thus, the possibility that the insulating property of the motor 58 is impaired by the water flowing down can be eliminated.

In addition, in the case of this configuration, the pump blade 65 is disposed below the motor 58, so that even if the seal 66 is deteriorated, the water scraped by the pump blade 65 causes
Since it is difficult to reach the portion 8 naturally, the insulation of the motor 58 can be maintained more favorably. Also, the motor 58
Are arranged in the vertical axis state, and the load due to the weight of the motor 58 is less likely to be applied to the bearings and seals 66 of the motor 58, so that the bearings and seals 66 can have a long service life.

Further, the pump case 51 includes the pump blade 6.
5 has a discharge chamber 74 for receiving the discharged water along the motor chamber 56 in which the motor 58 is housed. At the same time, and the molding cost can be reduced. For this purpose, the motor chamber 56 is open upward, and the discharge chamber 74 is open downward.

Further, in this case, since the discharge chamber 74 extends along the motor chamber 56, the motor 58 can be cooled by the water in the discharge chamber 74, and the vibration and noise generated by the motor 58 can be reduced. It can be absorbed by the water in 74 and silenced. Further, the pump case 51 has a suction passage 73 for sucking water outside the machine inside the discharge chamber 74, whereby the suction passage 73 is provided outside the discharge chamber 74. Can be made compact.

Further, the pump case 51 has a motor chamber 56.
Has a drain port 68 communicating with the outside of the pump case 51 at the lower part of the pump case 51, whereby when the seal 66 is deteriorated and water enters from the inside of the pump casing 67 into the motor chamber 56, water is discharged outside the pump case 51. The motor 58 can be discharged quickly, and the insulation of the motor 58 can be maintained more favorably.
Also, in this case, even if the water leaked from the above-mentioned pump case 51 and flowing down rises on the surface on which the water supply pump 48 is installed, the water drain port 68 is positioned sufficiently higher than that. As a result, water does not enter through the water drain port 68, and the insulating property of the motor 58 can be maintained well.

In the motor 58, the connection terminal 60 is located above the pump case 51. Water leaking out of the pump case 51 and flowing down is hardly applied to the connection terminal 60. 58 can be maintained satisfactorily. And the water supply pump 4
Numeral 8 is disposed at the rear of the washing machine, that is, at the rear of the washing machine, so that the driving vibration when the water supply pump 48 is operated can be reduced to be felt by a user standing in front of the washing machine, so that it is comfortable. Can be used.

FIG. 5 shows a second embodiment of the present invention. The same or similar parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. Is described only. In this case, the suction port 91 and the discharge port 75 are provided on both sides of the motor 58 by providing the suction port 91 symmetrically with the discharge port 75 with the motor 58 interposed therebetween instead of the above-described suction port 69. Like that.
As a result, the suction passage 92 and the discharge chamber 74 connected to the suction port 91 and the discharge port 75 are also located on both sides of the motor 58, and when the water supply pump 48 is operated, water flows on both sides of the motor 58. Therefore, the effect of cooling the motor 58 with water can be increased, and the effect of absorbing vibration and noise generated by the motor 58 with water to reduce noise can also be increased.

In this case, the motor 58 is connected to the connection terminal 6.
0 is located above the discharge port 75 of the pump case 51. Thereby, the connection pipe 86
When water leaks from the connection portion between the connection pipe 86 and the discharge port 75 due to deterioration of the connection pipe 86, the water can hardly be applied to the connection terminal 60, and the insulation of the motor 58 can be further improved. It can be maintained well.

In the second embodiment, the motor support 62 is replaced with a short cylindrical seal support 93, and the partition plate 94 is replaced with the partition plate 79 described above. Unlike this, a pump having only the water passage 95 facing the pump blade 65 is used. Further, the check valve 96
A partition plate 94 is formed of an elastic body such as a rubber plate, which normally closes a space between a suction chamber 97 formed inside the non-motor side case 53 and a suction passage 98 communicating with the suction passage 92 by elasticity. And

The present invention is not limited to the embodiment described above and shown in the drawings. In particular, the washing machine as a whole is of the above-mentioned fully automatic type (drying / washing machine).
The present invention is not limited to this, and may be carried out with appropriate modifications without departing from the gist, such as a two-tub washing machine.

[0040]

The present invention is as described above.
The following effects are obtained. According to the washing machine of claim 1, even if water leaks from the pump case of the water supply pump provided in the machine, the water does not touch the motor, and the water level reaches the surface where the water supply pump is installed. The raised water does not easily penetrate into the motor portion, and the motor insulation can be maintained well.

According to the washing machine of the second aspect, the water scraped by the pump blades of the water supply pump can hardly reach the motor portion naturally, and the insulation of the motor can be maintained more favorably. According to the washing machine of the third aspect, the burden of the motor of the water supply pump due to the weight of the motor can be less likely to be applied to the bearings and seals of the motor, and the life thereof can be secured long.

According to the washing machine of the fourth aspect, the discharge chamber and the motor chamber of the pump case of the water supply pump can be formed simultaneously using a simple mold, and the molding cost can be reduced. In this case, the motor can be cooled and the noise can be effectively reduced. According to the washing machine of the fifth aspect, the components of the discharge chamber and the suction passage of the pump case of the water supply pump can be made compact.

According to the washing machine of the sixth aspect, the cooling effect and the silent effect of the motor of the water supply pump can be more reliably obtained. According to the washing machine of the seventh aspect, when water enters the motor chamber from the inside of the pump casing of the water supply pump, the water can be quickly discharged to the outside of the pump case, and the insulation of the motor can be maintained more favorably. . Further, in this case, the water whose water level has reached the surface on which the water supply pump is installed does not enter through the water drainage hole, whereby the insulation of the motor can be maintained satisfactorily.

According to the washing machine of the present invention, the water leaking from the pump case of the water supply pump and flowing down can be less likely to be applied to the connection terminal of the motor, and the insulation of the motor can be maintained well. According to the washing machine of the ninth aspect, even when water leaks from the outlet of the water supply pump, the water is less likely to be applied to the connection terminal of the motor,
The insulation of the motor can be further improved.
According to the washing machine of the tenth aspect, it is possible to reduce the user's perception of the operation vibration when the water supply pump is operated, and it is possible to use the washing machine comfortably.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a water supply pump alone showing a first embodiment of the present invention.

FIG. 2 is a plan view of a feedwater pump alone.

FIG. 3 is a cutaway side view of the entire washing machine.

FIG. 4 is a cutaway plan view of a portion where a water supply pump of the washing machine is provided.

FIG. 5 is a view corresponding to FIG. 1 showing a second embodiment of the present invention.

FIG. 6 is a diagram corresponding to FIG. 1 showing a conventional example.

FIG. 7 is a diagram corresponding to FIG. 2;

[Explanation of symbols]

45 is a top cover, 48 is a water supply pump, 51 is a pump case, 56 is a motor chamber, 58 is a motor, 59 is a rotating shaft, 60 is a connection terminal, 65 is a pump blade, 68 is a drain port, 73 is a suction path, 74 Is a discharge chamber, 75 is a discharge port, 91
Indicates an inlet.

Claims (10)

[Claims] 1. An apparatus having a water supply pump for supplying water outside the apparatus into a tank, wherein the water supply pump is provided with a motor for rotating a pump blade at an upper part of a pump case. A washing machine characterized by being made. 2. The washing machine according to claim 1, wherein the pump blade is disposed below the motor. 3. The washing machine according to claim 1, wherein the motor is disposed in a vertical axis state. 4. The washing machine according to claim 1, wherein the pump case has a motor chamber for accommodating a motor and a discharge chamber for receiving water discharged from the pump blades along the motor chamber. 5. The washing machine according to claim 1, wherein the pump case has a suction passage provided in a discharge chamber for receiving water discharged from the pump blades for suctioning water outside the machine. 6. The washing machine according to claim 1, wherein the pump case has a suction port for sucking water outside the machine and a discharge port for discharging water discharged from the pump blades on both sides of the motor. Machine. 7. The washing machine according to claim 1, wherein the pump case has a water drain port communicating with the outside of the pump case at a lower portion of a motor chamber accommodating the motor. 8. The washing machine according to claim 1, wherein the motor has a connection terminal located above the pump case. 9. The washing machine according to claim 1, wherein the motor has a connection terminal at a position above a discharge port of the pump case. 10. The washing machine according to claim 1, wherein a water supply pump is provided at a rear portion of the machine.