JPH0240944Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a washing machine in which water is pumped into a lint catcher or the like by a pump action caused by the rotation of an agitator.

[Technical background of the invention]

Conventionally, a washing machine has been provided in which a pulsator is provided with a back blade, and water in a washing tank is circulated through a passageway to capture lint by a pumping action generated by the back blade as the pulsator rotates. Generally, in this washing machine, a casing constituting the water inlet part of the water flow channel is arranged at the inner bottom of the washing tub so that the inlet side faces the outer periphery of the stirring blade, and the water outlet of this casing is arranged vertically. The washing tank is connected to a water pumping hose by a bellows-shaped hose, and the water inside the washing tank is pumped up to the lint catcher at the upper part of the washing tank through the water passage constructed as described above.

[Problems with background technology]

However, with conventional casings, water entry resistance is large, and the bellows-shaped hose is bent into an arc shape to connect the water outlet of the horizontally oriented casing to the vertical pumping hose. Water resistance was also large, and the overall pump head was low and the amount of water pumped was small.

[Purpose of invention]

This idea was created in view of the above circumstances.
The purpose is to provide a washing machine that can increase the amount of water pumped by reducing the water entry resistance of the casing and the water flow resistance of the portion where the water flowing into the casing is turned upward.

[Summary of the idea]

In the present invention, the casing constituting the water inlet part of the water passageway that receives water discharged from the pump chamber is formed into a substantially fan shape, and both side walls of the casing are connected to the circumferential wall of the pump chamber in a substantially tangential direction. , characterized in that the water outlet side of the casing is formed so as to face upward in sequence, and the water outlet at the end is located directly above the intersection of the extension lines of both side walls of the casing. .

[Example of idea]

An embodiment of the present invention will be described below with reference to the drawings. 1 is a washing tank installed inside an outer box (not shown), 2 is an operation box installed at the rear of the outer box, and at the bottom of this operation box 2, a horizontally long running water is installed along the rear wall of the washing tank 1. Case 3 is installed. Reference numeral 4 denotes a relatively large-diameter pulsator as an agitator, which has a large number of pumping blades 4a protruding from its back surface, and is housed in a circular pump chamber 5 recessed in the bottom wall of the washing tank 1. has been done. Reference numeral 6 denotes a drainage chamber formed in the side wall of the washing tank 1, which has a groove shape that continuously extends upward from the pump chamber 5 and is recessed outward. An upper strainer 7 and a lower strainer 8 are attached for partitioning. 9
is a well-known drainage mechanism disposed in the drainage chamber 6, in which an overflow pipe 12 is connected to the upper end of a connecting port 11 formed at the lower end of a vertically long pipe support 10, and an annular pipe is connected to the lower end. The valve body 13 is fitted into the valve body 13. This drainage mechanism 9 is moved up and down via a cable 14 by an operation section (not shown) attached to the operation box 2, and a valve body 13 is moved around a drainage port 15 formed in the bottom wall of the washing tank 1. They are becoming closer to each other. 1
6 is a drain hose connected to the drain port 15.

Now, reference numeral 17 denotes a passageway for pumping water in the washing tank 1 into the flowing water case 3, which will be described in detail below. That is, 18 is a casing constituting the water inlet part of the water flow channel 17, which consists of a casing main body 19 made of plastic and a casing cover 20 also made of plastic.
9 is approximately fan-shaped, and its upper wall has a wide water inlet 2.
All but one side are open, and a partition portion 19a is provided at the center of the water inlet 21 to partition the water inlet 21 into left and right sides. Further, an extending portion 19b is formed to protrude from the central portion of the lower wall of the casing main body 19 at the end on the water inlet 21 side, and a portion on the water outlet 22 side corresponding to the open portion of the upper surface is sequentially directed upward. For example, it is curved into an arc shape so that the water outlet 22 faces vertically upward. In this case, the water outlet 22 is formed to be located directly above the intersection G of the extension lines of the left and right side walls 19c and 19d of the casing main body 19. On the other hand, the casing cover 20 closes the open top part of the casing main body 19, is curved in an arc shape corresponding to the curved part of the bottom wall, and is attached to the open top part of the casing main body 19 by appropriate engagement means. It is worn. In this case, bearing holes 19e and 20a are formed in the lower wall of the casing main body 19 and the casing cover 20, respectively, and the shaft portion 23a at one end of the rotary plate 23 is inserted into the bearing holes 19e and 20a. It is supported so that it can rotate freely. The casing 18 configured as described above is disposed at the bottom of the drain chamber 6, and both left and right sides of the extending portion 19b are fixed to the inner bottom of the pump chamber 6 by screws 24. and,
In this fixed state, the left and right side walls 19c and 19d of the casing main body 19 are connected to the peripheral wall 5 of the pump chamber 5.
A suction passage 25 is formed that extends substantially tangentially to a and communicates with the inside of the pump chamber 5 below the casing main body 19. Reference numeral 26 denotes a pumping hose, whose lower end is fitted and connected to the water outlet 22 of the casing 18, and whose upper end is connected to a connecting port 3a formed on the bottom wall of the water flow case 3. Reference numeral 27 denotes a lint filter attached to the water flow case 3, which captures lint from the water in the washing tank 1 pumped up through the water passage 17.

Next, the operation of the above configuration will be explained. During washing operation,
The pulsator 4 is driven by a motor to rotate in forward and reverse directions at predetermined intervals to generate a washing water flow in the washing tub 1, and as the pulsator 4 rotates, the back blade 4a
exhibits a pumping action, and the water in the drain chamber 6 flows into the suction path 2.
5 into the pump chamber 5 and is pumped into the casing 18 through its water inlet 21. That is,
When the pulsator 4 rotates in the counterclockwise direction in FIG. 3, the water sent out from the pump chamber 5 flows into the casing 18 from the right side of the peripheral wall 5a in a tangential direction as shown by arrow A. Then, the rotating plate 23 rotates in the direction of arrow B as if pushed by this water flow, and substantially closes one side, that is, the left half of the water inlet 21, as shown by the broken line. Furthermore, when the pulsator 4 rotates in the reverse clockwise direction, the water pumped from the pump chamber 5 flows tangentially from the left side of the peripheral wall 5a into the casing 18 as shown by arrow C, and then circulates. The moving plate 23 is pushed by this water flow and rotates in the direction opposite to the arrow B, thereby substantially closing the right half of the water inlet 21 as shown by the two-dot chain line. The water that has flowed into the casing 18 in this way is pushed up by the pump action of the back blade 4a, and is passed through the pumping hose 26, the water flow case 3, and the lint filter 27.
It is returned to the washing tank 1 through the. In this manner, when the water in the washing tank 1 circulates through the water passage 17, the lint and the like contained therein are captured by the lint filter 27.

According to the above configuration, water discharged from the pump chamber 5 flows into the casing 18 as a water flow in the tangential direction of the peripheral wall 5a, but the side walls 19c and 19d of the casing main body 19 are connected to the peripheral wall 5a in the tangential direction. Because the discharge water is installed in the side wall 1
The water flows smoothly into the casing 18 without colliding with 9c and 19d and reducing its momentum, and the resistance to water entering is reduced. Moreover, since the water outlet 22 side of the casing 18 is formed so as to face upward sequentially, the water pumping hose 26 can be directly connected to the water outlet 22, whereas in the conventional method, the water outlet of the casing and the water pumping hose were connected by a bellows-shaped hose. Unlike this, the water flowing into the casing 18 can be smoothly directed into an upward flow, and water flow resistance is greatly reduced. Therefore, this reduction in water entry resistance and water flow resistance increases the amount of water pumped, which is particularly effective when the large pulsator 4 is rotated at low speed to prevent cloth entanglement.

Furthermore, as in this embodiment, if the rotary plate 23 is provided to close one side of the water inlet 21, water flowing in from one side of the wide water inlet 21 can escape into the pump chamber 5 from the other side. You can prevent it from coming out. Furthermore, since the water outlet 22 is located directly above the intersection G of the extension lines of both side walls 19c and 19d, the force of the water flowing into the casing 18 directly pushes up the water in the pumping hose 26. It can be effectively used as a force. That is, water outlet 22
exists on the side closer to the pump chamber 5 than the intersection G of the extension lines of both side walls 19c and 19d, the side wall 19c or the side wall 1 depending on the rotation direction of the pulsator 4
The water that has flowed into the casing 18 along the line 9d tends to be biased towards one side of the left and right sides of the water outlet 22, resulting in a situation where the lifting force is strong on one side and weak on the other side, and some of the water Pump room 5
It may flow backwards to the side. Furthermore, if the water outlet 22 is located on the side farther from the pump chamber 5 than the intersection G of the extension lines of both side walls 19c and 19d, the side wall 19c or the side wall 19 depending on the rotation direction of the pulsator 4
The water that has flowed into the casing 18 along the direction d collides with the other side wall before reaching the water outlet 22 and its momentum is reduced, resulting in a reduction in pumping force. However, in this embodiment, since the water outlet 22 is provided to correspond to the intersection point G of the extension lines of both side walls 19c and 19d,
The water flowing into the casing 19 along 9d is
The water does not collide with the other side wall before reaching the water outlet 22, and the water does not shift to one side of the water outlet 22, so that the momentum when flowing into the casing 19 directly acts as a lifting force. This will further increase the amount of water pumped.

[Effect of idea]

As is clear from the above description, the present invention is configured such that the side wall of the casing is connected to the peripheral wall of the pump chamber in a substantially tangential direction, so that water can flow smoothly into the casing. The resistance is reduced, and since the water outlet side of the casing is formed so as to face upward sequentially, the water flowing into the casing can smoothly change its direction upward, and the direction can be changed using a bellows-shaped hose. The water flow resistance is reduced compared to the conventional method, and since the water outlet of the casing is located directly above the intersection of the extension lines of both side walls of the casing, water flowing into the casing is reduced. The momentum directly acts as pumping force, which has the excellent effect of increasing the amount of pumped water overall.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a longitudinal cross-sectional side view of the main parts including the drainage chamber, Fig. 2 is an exploded perspective view of the main parts, and Fig. 3 is a plan view of the main parts. . In the figure, 1 is a washing tank, 4 is a pulsator (agitation body),
5 is a pump chamber, 17 is a water passage, 18 is a casing, 19c, 19d are side walls, 21 is a water inlet, 22
is a water outlet, and 23 is a rotating plate.

Claims (1)

[Scope of utility model registration request] A circular pump chamber is formed at the inner bottom of the washing tank,
In this pump chamber, an agitator equipped with a back blade is disposed, and the water discharged by the pumping action of the back blade is pumped up through the passageway, and the water inlet part of the passageway receives water discharged from the pump chamber. The casing constituting the casing is formed into a substantially fan shape so that both side walls of the casing are connected to the circumferential wall of the pump chamber in a substantially tangential direction, and the water outlet side of the casing is formed so as to face upward sequentially, and the end A washing machine characterized in that a water outlet is provided at a position corresponding to the intersection of the extension lines of both side walls of the casing.