JPH0217590Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention has a washing tank and a water storage tank that stores the used washing liquid and rinse water in the washing tub for reuse. Regarding a washing machine with a water tank.

(b) Prior art In conventional systems in which a washing tank and a water storage tank are installed side by side, a pump is used to transfer liquid from the washing tank to the water tank or from the water tank to the washing tank. The pump is separate from the water tank, and when the pump becomes clogged with lint, etc., the pump must be disassembled and cleaned, which is troublesome.

(c) Purpose of the invention The purpose of the invention is to make the pump less likely to be clogged with thread waste, and to make it easier to clean the inside if it becomes clogged.

(d) Structure of the invention The invention forms a recess closed with a cap on the bottom of a water tank, forms a U-shaped waterway inside this recess with a vertical partition wall, and connects one end of this waterway into the water tank. The impeller of the reversible pump is connected to the bottom of the washing tub by a connecting waterway with a connecting valve at the other end, and is mounted on a vertical shaft that can be rotated in either left or right direction in the middle of the U-shaped waterway. is arranged so that liquid is transferred from the washing tub to the water storage tank or from the water storage tank to the washing tub depending on the direction of rotation of the impeller, and the distance between the impeller and the cap is set from near the center of the impeller to the partition wall. The area between the two is narrower than the other parts.

With this configuration, the area of the flow passage of the pump is expanded without reducing the water delivery capacity of the pump, making it difficult for lint to become clogged, and even if it becomes clogged, the water storage tank can be opened simply by removing the cap. You can easily clean the pump from inside.

(E) Example This will be explained based on the drawings. Reference numeral 1 denotes a frame of the main body of the washing machine, and an outer tub 2 is suspended from the upper part of the frame 1 by a plurality of hanging rods 3 in an anti-vibration manner. Inside the outer tub 2, there is provided a washing tub 5 which also serves as a dehydration tub and has a large number of dehydration holes 4 in its peripheral wall, and a rotary blade 6 is disposed at the center of the bottom of the washing tub 5. At the bottom of the outer tub 2, a drive motor 7 that rotates rotary blades 6 during washing and rotates the washing tub 5 during spin-drying, a bearing case 8, and a drain port 9 are installed. The port 9 is communicated with the outside of the machine by a drain hose 11 via a drain electromagnetic valve 10 that opens when excited. 14 is a water supply port for supplying water to the washing tub 5.

15 is a synthetic resin water storage tank in the shape of a rectangular parallelepiped, and is composed of a main body 16 and legs 17.
One side of the washing machine 6 is attached to the frame 1 by being joined to the side of the frame 1 of the main body of the washing machine.

A top plate 23 made of synthetic resin is attached to the upper ends of the frame 1 and the water tank 15.
This creates a sense of unity with the water tank 15 and improves the appearance. 24 is a lid of the washing machine that opens and closes the clothes input port 25; 26 is a lid that closes the upper end opening of the water tank 15; 27;
is a control box installed at the rear of the top of the washing machine.

An oval recess 28 is formed on the bottom surface of the water tank body 16, and this recess is covered with a cap 29. There is a recess 2 on the back side of the cap 29.
A rib 31 whose lower end is fitted into a groove 30 formed on the bottom surface of the recess 8 and a rib 33 whose lower end is fitted into a groove 32 formed on the bottom surface of the water tank 16 are integrally vertically provided. ing. Further, a partition wall 35 is provided integrally and continuously from the rib 31, and the lower end of the partition wall 35 fits into a groove 34 formed on the bottom surface of the recess, and the partition wall 35 forms a substantially U-shaped waterway inside the recess 28. There is.

One end of the U-shaped waterway communicates with the inside of the water tank 16 through a number of through holes 36 provided in the cap 29, while a water inlet 37 is opened at the bottom of the other end of the waterway, and this water inlet 37 is connected to the connecting waterway. It is connected to the drain port 9 at 38. That is, the other end of the U-shaped waterway is communicated with the bottom of the washing tub 5 through a connecting waterway 38. A connecting valve 39 is provided in the connecting waterway 38 to open and close the waterway 38.

An impeller 41 of the pump 40 is disposed in the middle of the U-shaped waterway. This impeller 41 is fixed to the upper end of a vertical shaft 43 of a pump motor 42 passing through the bottom surface of the recess 28 with a screw 44 .
The pump motor 42 is housed in a motor casing 45, and the motor casing 45 is fixed to the outer bottom surface of the recess 28 via a packing 46. 4
7 is a water seal member, and 48 is a bearing metal. The impeller 41 has a large number of blades 50 protruding radially on a base plate 49, the central part 51 of which is raised to the same height as the blades 50 to form a flat surface, and the diameter of the flat surface 51 is is 1/ of the diameter of the substrate 49
Approximately 3 to 2/3 (in the example, the diameter of the substrate 49 is 90 mm)
[mm], and the diameter of the flat surface 51 is 50 [mm]). The impeller 41 rotates at about 1400 to 1700 [rpm] both left and right.

Therefore, if the impeller 41 rotates to the left in FIG. 2 with the drain electromagnetic valve 10 closed and the connecting valve 39 opened, the liquid in the washing tub 5 will drain into the connecting waterway 3.
8-Water port 37-Pump 40-When water is sent to the water storage tank 16 through the through hole 36 and the impeller 41 rotates to the right, the liquid in the water storage tank 16 flows through the through hole 36-
The water is returned to the washing tub 5 through the pump 40, the water inlet 37, and the connecting waterway 38. That is, the pump 40 becomes a reversible pump. The tip 35' of the partition wall 35 is close to the outer peripheral edge of the impeller 41 and serves as a drain.

By the way, pump impeller 41 and cap 29
If the distance between the pump and the pump is narrow, the water delivery capacity of the pump will improve, but foreign matter such as lint will easily clog the pump. On the other hand, if the spacing is wide, foreign objects are less likely to clog, but the water delivery capacity of the pump will be reduced.

Therefore, in the present invention, the distance between the cap 29 and the impeller 41 is set so that the distance between the flat surface 51, which is the central part of the impeller, and the partition wall 35 is lower than that of the cap 29, so as to prevent foreign objects from clogging and reduce the water delivery capacity of the pump. A surface 52 is provided to make it narrower and other parts are wider. The wider interval H1 is the impeller 41
It is preferable that the height is 0.75 to 1.25 times the height H2 of the blade 50 (in the example, H1 is 19 [mm] and H2 is 20 [mm]).

Also, if the center part of the impeller 41 is lowered,
Negative pressure builds up in this part, making it easy for thread waste to get caught, but by making the central part a flat surface 51 with the same height as the blade 50, as in this embodiment,
It is difficult for lint to get caught, and even if it gets caught, the impeller 4
It becomes easy to be removed by forward or reverse rotation of 1.

Also, pressure is applied in the recess 28 closed by the cap 29 due to the rotation of the impeller 41, but the ribs 31 and 33 of the cap fit into the grooves 30 and 32 prevent liquid from leaking from the cap 29. can be kept to a minimum.

In a washing machine with such a configuration, when the used liquid in the washing tub 5 is transferred to the water storage tank 16, the impeller 41 of the pump is rotated counterclockwise as described above, and the liquid in the water storage tank is returned to the washing tank. Rotate clockwise to reuse.

If foreign matter should become clogged inside the pump 40 or in the U-shaped waterway, it can be easily removed by simply removing the cap 29.

(f) Effects of the invention According to the invention, the area of the flow passage of the pump is expanded without reducing the water delivery capacity of the pump, making it difficult for foreign objects such as lint to become clogged, and in the event that foreign objects become clogged. However, it can be easily removed by simply removing the cap, making it easy to maintain and inspect the pump and waterway.

[Brief explanation of the drawing]

The drawings show a washing machine with a water tank according to the present invention, in which Fig. 1 is a front longitudinal cross-sectional view of the whole, Fig. 2 is a plan view of the bottom of the water tank, and Fig. 3 is a view taken along A-A1-A2-A of Fig. 2. FIG. 5...Washing tank, 16...Water tank body (water tank),
29...cap, 28...recess, 35...partition wall, 36...through hole, 37...water inlet, 39...connecting valve, 38...connecting waterway, 40...reversible pump,
41... Impeller, 52... Low stage surface, 50... Vane, 51... Flat surface.

Claims (1)

[Scope of Claim for Utility Model Registration] A washing tub and a water storage tank are installed side by side, a recess is formed in the bottom of the water tank and is covered with a cap, and the inside of the recess is formed into a U-shaped waterway by a vertical partition wall. , one end of the water channel is connected to the water storage tank, the other end is connected to the bottom of the washing tub by a connecting waterway having a connecting valve, and the middle part of the U-shaped waterway is configured to rotate in either left or right direction. A reversible pump has an impeller mounted on a vertical shaft to transfer liquid from the washing tank to the water tank or from the water tank to the washing tank depending on the direction of rotation of the impeller, and the impeller and the cap A washing machine with a water storage tank in which the distance between the central part of the impeller and the partition wall is narrower than in other parts. A washing machine with a water tank according to claim 1, wherein the spacing between the other parts is 0.75 to 1.25 times the height of the blades of the impeller. The central part of the impeller is a flat surface with a height substantially the same as the height of the blades of the impeller, and the diameter of the flat surface is 1/3 to 2/3 of the diameter of the impeller. A washing machine with a water tank as described in item 1.