JPH03284293A - Automatic detergent dispenser - Google Patents

Abstract

PURPOSE:To always supply a fixed amount of detergent even if viscosity thereof is varied by providing detergent inlet, air exit, and detergent outlet in a first cylindrical body for detergent to run out by its own weight, and by connecting a detergent tank with the inlet, and the outlet with a washing tub through a pipe respectively. CONSTITUTION:When a division plate 10 rotates at approximately 180 deg., detergent in a space 9a begins to run out from a pipe 5b to a drum 6. Simultaneously, detergent begins to run into a space 9b, and it is filled with the detergent until the division plate 10 rotates at 360 deg., while all detergent in the space 9a runs out. With this operation repeated, detergent is supplied to the drum 6 from a detergent tank 4. In the lower part of an outer case 8, a hole for draining leaked detergent from an inner case 9 is provided, to which a drain pipe 5e is connected.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an automatic detergent dosing device that is mainly provided in an automatic washing machine and supplies detergent to a washing tub.

(b) Conventional technology Conventionally, in this type of equipment, a high-speed rotary pump (60
00 to 7000 rpm), the detergent is supplied from the detergent tank to the washing tub, and the supply amount is controlled by the operating time of the pump (for example, in Japanese Patent Laid-Open No. 61-161).
! (See Publication No. 394).

(c) Problems to be solved by the invention However, in conventional automatic detergent dispensing devices using high-speed pumps, if the viscosity of the detergent changes depending on the ambient temperature, type of detergent, etc., the rate of supply per hour changes. However, in order to maintain a certain amount of input, there was a problem in that the operating time had to be controlled in accordance with the viscosity.

This invention was made taking these circumstances into consideration,
To provide an automatic detergent dispenser capable of always supplying a constant amount of detergent even if the viscosity of the detergent changes.

(d) Means for Solving the Problems This invention provides an automatic detergent dosing device for dispensing detergent from a detergent tank to a washing tub, in which the detergent tank, the dispensing device, and the washing tub are arranged in order from vertically upward to downward, The feeding device is
A first cylindrical body with a bottom, a second cylinder with a bottom that is coaxially rotatably fitted into the first cylindrical body and forms a sealed hollow part inside the first cylindrical body, and integrally formed with the second cylinder. and a partition plate that divides the hollow part into two equal parts in the diametrical direction, and a drive device that rotates the second cylindrical body and the partition plate around their central axis, and the detergent is placed in one of the two halves of the hollow part under its own weight. A detergent inlet, an exhaust port, and a detergent outlet are provided in the first cylindrical body so that the detergent flows in from the other side and flows out from the other by its own weight, and the detergent tank and the detergent inlet and the detergent outlet and This automatic detergent dispensing device is characterized by being connected to the washing tub through pipes.

The present invention also provides an automatic detergent dosing device for dispensing detergent from a detergent tank to a washing tub, which includes a cylinder with both ends closed, a disk-shaped piston inserted into the cylinder, and a drive means for reciprocating the piston. A suction port for sucking in the detergent is provided at one end of the cylinder, a discharge port for discharging the detergent is provided at the other end, and a through port is provided in the piston that penetrates in the axial direction of the cylinder. A first check valve that prevents flow from inside the cylinder to the outside of the cylinder is provided in the through hole, and a second check valve that prevents flow from the discharge port side to the suction port side is provided in the through port.
This automatic detergent dispensing device is characterized in that each of the detergent tanks and the suction port is provided with a reverse valve, and the detergent tank and the suction port and the discharge port and the washing tub are connected by pipes, respectively.

Furthermore, the present invention provides an automatic detergent dosing device for dispensing detergent from a detergent tank to a washing tub. a cylindrical body formed on a part of the inner surface of the cylindrical body over the entire length in the axial direction and in contact with the outer circumferential surface of the cylindrical body; A second protrusion that is retractable and comes into elastic contact with the circumferential surface of the cylindrical body, and a drive device that rotates the cylinder around an axis, wherein one bottom of the cylindrical body is connected to the gap between the cylindrical body and the cylindrical body. The first protrusion has two through-holes formed on both sides thereof, and one through-hole is connected to the detergent tank and the other through-hole is connected to the washing tub through pipes. This is an automatic detergent dispenser.

(E) Effect In the first invention, since the detergent tank, the charging device, and the washing tub are arranged in order from vertically upward to downward, the detergent is absorbed by its own weight into one hollow part in the second cylinder partitioned by the partition plate. It flows in. Then, when the partition plate rotates, the inflowing detergent moves to the other hollow part, and the detergent flows out from the detergent outlet into the washing tub under its own weight. Therefore, by rotating the second cylindrical body at such a low speed that one hollow space partitioned by a partition plate is filled with detergent regardless of its viscosity, an amount of detergent proportional to the rotational speed is always accurately washed. It is put into the tank.

In the second invention, when the piston is moved in the forward direction, that is, from the suction port side to the discharge port side of the cylinder, detergent is sucked into the cylinder from the suction port, and the piston is moved in the reverse direction.
When the detergent is moved, the detergent moves to the discharge port side of the cylinder through the through hole of the piston. When the piston is moved forward again, the detergent in the cylinder is discharged from the discharge port, and the detergent is again sucked into the cylinder from the suction port. Therefore, by repeating this reciprocating movement of the piston a predetermined number of times, detergent for that number of times is put into the washing tub. Note that the moving speed of the piston is set to an extremely low speed so that the amount of detergent immersed is proportional to the number of reciprocations, regardless of the viscosity of the detergent.

In the third invention, when the cylindrical body rotates, detergent is supplied to the gap between the cylindrical bodies from one through-hole and is pushed out to the other through-hole. Therefore, if the rotation speed is set to a low speed, detergent corresponding to the number of rotations can be accurately supplied to the washing tub regardless of the viscosity of the detergent.

(f) Examples Hereinafter, the present invention will be described in detail based on examples shown in the drawings. This invention is not limited by this.

FIG. 1 is a perspective view of a drum-type washing machine to which an embodiment of the present invention is applied, in which 1 is a main body case, 2 is a door for loading and unloading laundry, and 3 is a detergent supply port. 2 and 3 are cutaway sectional views of main parts of FIG. 1, and in these figures, 4 is a detergent tank, 3a is a cap that closes the detergent supply port of the detergent tank, 5 is a detergent injection device, and 6 is a detergent injection device. A drum 7 is supported by a spring 1a inside the main body case 1, and a rotating drum 7 is rotatably supported inside the drum 6. 5a is a pipe connecting the bottom of the detergent tank 4 and the detergent dispenser 5; 5b and 5c are air venting pipes of the washing dispenser 5; and 5d is a pipe connecting the detergent dispenser 5 and the top of the drum 6. FIG. 4 is a longitudinal cross-sectional view of the detergent immersion device 5 shown in FIG. 2, and FIG. 5 is a cross-sectional view thereof.

In these figures, 8 is a cylindrical outer case, 9 is a cylindrical inner case that is coaxially and rotatably inserted into the outer case 8, and lO is formed integrally with the inner case 9 and is an outer case 8.
The internal space formed by the inner case 9 and the inner case 9 is referred to as a space 9a.
11 is a shaft that rotatably supports the inner case 9 inside the outer case 8, +2 is a cover plate that stores the inner case 9 inside the outer case 8, and 13 is a cup. A motor is coupled to the reset 11 via a ring 14, 15 is a bracket that supports the motor 13, 16 is a cam fixed to the motor output shaft and rotates together with the reset 11, and 17 is a limit switch that is turned on and off by the cam 16. be. Further, the outer case 8 is provided with a detergent inlet 18, an outlet 19, 20, and a detergent outlet 21. Reference numerals 22 and 23 denote capacity adjustment balls made of metal or resin and inserted into each of the spaces 9a and 9b separated by the partition plate 10 inside the case 8.9. FIG. 6 is an explanatory diagram showing the arrangement relationship between the cam 16 and the microswitch 17, and the cam 16 turns the microswitch 17 on and off every time the motor 13 rotates. FIG. 7 is an electric circuit diagram showing the drive circuit of the motor 13, in which 24 is a drive AC power source, 25 is a relay, 25a is a contact of the relay 25, 26 is a counter, and 262L is a counter 26. When a predetermined number is counted, the circuit is turned off. A counter contact 27 is a reset button for the counter 26, which is turned on when the counter 26 is reset. Incidentally, as the motor 13, an AC motor with a speed reducer is used.

In such a configuration, when the partition plate IO starts rotating in the direction of the arrow shown in FIG. 4, detergent is supplied to the case internal space 9a through the pipe 5a, and the case interior space 9a is eventually filled with the detergent. Then, when the partition plate 10 rotates approximately 180 degrees, the space 9a filled with detergent is located on the right side in FIG. 4, and the detergent begins to flow out from the pipe 5b to the drum 6. At the same time, the detergent starts flowing into the space 9b, and by the time the partition plate IO has rotated 360 degrees, the space 9b is filled with detergent and all the detergent in the space 9a has flowed out. By repeating this operation, the detergent is immersed into the drum 6 from the detergent tank 4. A hole is provided in the lower part of the outer case 8 to drain detergent leaked from the inner case 9, and a drain pipe 5e is connected to the hole. Also, exhaust port 19.20
The open ends of the pipes 5b and 5c, respectively connected to the detergent tank 4, are fixed at a position higher than the detergent liquid level in the detergent tank 4.

Further, the balls 22 and 23 are made of a material having a lower density than the detergent, or are formed in a hollow shape so as to float on the wall surface of the detergent. Large capacity/fc that requires a large amount of detergent? When applying this detergent feeding device to a washing tank, insert a small volume ball 2223, and when applying it to a small capacity washing tank, insert a large volume ball 22.23, thereby increasing the detergent supply capacity. Adjust. In addition, the inner case 9 is rotated by the motor 13, but even if the viscosity of detergent becomes high at low temperatures, the detergent will be sufficiently absorbed into the inner case 9.
The rotation speed is set to about 1 to 2 rpm so that one of the spaces is sufficiently filled during half a rotation. In this embodiment, the volume of the space on one side of the inner case 9 is set to 1.
It is set to 0cc. Therefore, the counter 26 shown in FIG.
When the set count value is set to 2 and the reset button 27 is pressed, the contact 26a is closed and the relay CR is activated.
The contact 25a is closed and the motor 13 rotates. Since the microswitch 17 closes once for each rotation, the counter 26 counts this, and when the count value reaches 2, the contact 26a is opened. This causes the motor 13 to stop. At this time, the inner case 9 is rotated twice by the motor 3, so 40cc is transferred from the detergent tank 4 to the drum 6.
This means that detergent has been supplied. In this way, the detergent being set is always supplied to the washing tub even if the viscosity of the detergent changes.

8 and 9 are main part sectional views showing an embodiment of the pond of the present invention, 31 is a detergent charging device, 31λ is a pipe for supplying detergent from the detergent tank 4 to the detergent charging device 31a, 3
1b is a pipe that supplies detergent from the detergent injection device 31b to the drum 6. Further, the detergent injection device 31 is operated by a motor 32.
driven by. The other configurations are the same as those of the previous embodiment. Figure 1O is a sectional view of the detergent injection device;
3 is a cylinder, 34 is a piston that slides inside the cylinder 33, 35 is a piston lever, 36 is a cover plate that slidably supports the piston lever 35 and covers the opening of the cylinder 33, and 37 is a cover plate of the cylinder 33. A spring installed inside to constantly bias the piston 34 in the direction of arrow B; 38 a cam driven by the output shaft of the motor 32 to reciprocate the piston 34 via the lever 35;
Reference numeral 9 represents a suction port connected to the detergent tank 4 through a pipe 31a to suck in detergent, and 40 represents a discharge port connected to the drum 6 through a pipe 31b to discharge the detergent. Also, 34
a, 34b are through holes drilled in the piston 34; 41.
42 is a check valve made of an elastic body (for example, rubber). The check valve 41 allows detergent to flow into the cylinder 37 from the suction port 39 when the piston 34 moves in the direction of arrow B, and causes detergent to flow into the cylinder 37 from the suction port 39 when the piston 34 moves in the direction of arrow C; Prevent spitting out.

In addition, a reverse valve 42 directs the detergent on the right side of the cylinder 34 to the left side when the piston 34 moves in the direction of arrow C through the through hole 34.
a, 34b to prevent detergent from flowing back through the through hole 34a when the piston 34 moves in the direction of arrow B.

In such a configuration, when the motor 32 rotates at a low speed, the piston 34 reciprocates within the cylinder 33 in response. When the piston 34 in FIG. 1O moves in the direction of arrow B, the detergent from the detergent tank 4 is sucked in from the chamber on the right side of the piston 34 in the cylinder 33 through the suction port 39. Next, when the piston 34 moves in the direction of arrow C, the detergent in the right-hand room is transferred to the through-hole 3.
Move to the room on the left via 4a and 34b. and,
When the piston 34 moves again in the direction of arrow B, the detergent on the left side of the piston 34 is pushed out from the discharge port 40 and supplied to the drum 6. This movement is repeated a set number of times as in the previous embodiment, and a fixed amount of detergent is supplied to the drum 6. In this fourth embodiment as well, the rotational speed of the motor 32 is set low enough that the viscosity of the detergent does not affect the amount of suction and discharge of the detergent.

FIGS. 11 and 12 are a cross-sectional view and a vertical cross-sectional view of a detergent dispensing device showing an embodiment of the pond, and the other configurations are the same as the embodiment shown in FIG. 8.

In FIGS. 11 and 12, 51 is a cylindrical body, and 52 is a cylindrical body 51 formed of an elastic body such as hard rubber.
A cylindrical body 51a is rotatably supported coaxially with a gap d inside thereof, and 51a is formed on a part of the inner surface of the cylindrical body 51 over the entire length in the axial direction of the cylindrical body 51, and is a part of the outer periphery of the cylindrical body 52. The protruding portion 52a that contacts the cylindrical body 52 is a protruding portion that is formed over the entire length in the axial direction on the outer surface of the cylindrical body 52 and elastically contacts the inner surface of the cylindrical body 51. The protruding portion 52a is provided inside the cylindrical body 52. It has a structure in which it is pulled toward the center of the cylindrical body 52 by the hollow portion 52c. 53 is a shaft that rotates the cylindrical body 52; 54 is a cover plate that rotatably supports the shaft 53 and covers the opening of the cylindrical body 51; and 55 is a motor that drives the shaft 53. Further, 56 is a suction port formed in the cylindrical body 61, and 57 is a discharge port formed in the cylindrical body 51. Note that the suction port 56 and the discharge port 57 are respectively connected to a detergent tank and a drum (not shown) via pipes, similarly to the previous embodiment.

In such a configuration, when the cylindrical body 52 is rotated in the direction of the arrow by the motor 55, as shown in FIG.
The protrusion 51a, the protrusion 52a, the inner surface of the cylinder 51, and the cylinder 5
In order to generate negative pressure in the space surrounded by the outer surface of 2,
Detergent is sucked in from the suction port 56. When the cylindrical body 52 rotates once and returns to the position shown in FIG. 12, the suctioned detergent is pushed out from the projection port 57, and at the same time, the detergent is sucked in from the suction port 56 in the same manner as described above. This operation is repeated a set number of times, and a predetermined amount of detergent from the detergent tank is supplied to the drum (washing tub). The rotational speed of the motor 55 is set to a low speed (for example, 1 to 2 rpm) as in the previous embodiment, and the flow rate of the supplied detergent is extremely low, so the supplied amount is mostly affected by its viscosity = 16 degrees. Never.

(G) Effects of the Invention According to the present invention, there is provided an automatic detergent dispenser that can always dispense a desired set amount without being affected by the viscosity of the detergent.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a washing machine to which an embodiment of the present invention is applied; FIGS. 2 and 3 are sectional views of the washing machine shown in FIG. 1;
Figures 4 and 5 are longitudinal and cross-sectional views showing details of the main parts of the washing machine shown in Figure 1, Figure 6 is a layout diagram of the main parts of the washing machine shown in Figure 1, and Figure 7 is FIG. 1 is an electrical circuit diagram of the main part of the washing machine shown in FIG. 1, FIGS. 8 and 9 are partial sectional views of a washing machine to which other embodiments of the present invention are applied, and FIG. 11 and 12 are a cross-sectional view and a longitudinal cross-sectional view showing details of main parts of still another embodiment of the present invention. 1...Body case, 2...Drum, 4
... Detergent tank, 5... Detergent dosing device, 6...
・Drum, 7...Rotating drum, 8...Outer case, 9...Inner case, lO...Partition plate, 11
...Nyaft, 12...Cover plate,
13...Motor, 16...Cam, 17...
・Micro switch, 18...Detergent inlet, 1
9.20...Exhaust port, 21...Detergent outlet. 1st Akane No. 4 Gaenzono No. d Rumen 7 12-

Claims (1)

[Claims] 1. In an automatic detergent dosing device for dispensing detergent from a detergent tank to a washing tub, the detergent tank, the dispensing device, and the washing tub are arranged in order from vertically upward to downward, and the dispensing device has a bottom. a first cylindrical body, a second cylinder with a bottom that is rotatably fitted coaxially into the first cylindrical body and forms a sealed hollow inside the first cylindrical body; It is equipped with a partition plate that divides the hollow part into two equal parts in the diametrical direction, and a drive device that rotates the second cylindrical body and the partition plate around its central axis, and the detergent flows into one of the two divided hollow parts by its own weight. In addition, a detergent inlet, an exhaust port, and a detergent outlet are provided in the first cylindrical body so that the detergent flows out from the other side under its own weight, and between the detergent tank and the detergent inlet and between the detergent outlet and the washing tub. An automatic detergent dispensing device characterized by a pipe connection between the two. 2. An automatic detergent dosing device for dispensing detergent from a detergent tank to a washing tub, comprising a cylinder with both ends closed, a disc-shaped piston inserted into the cylinder, and a drive means for reciprocating the piston, and one side of the cylinder A suction port for sucking in detergent is provided at one end of the piston, a discharge port for discharging detergent is provided at the other end, and a through port is provided in the piston that penetrates in the axial direction of the cylinder. A first check valve that prevents flow from the detergent tank and the suction port, and a second check valve that prevents the flow from the discharge port side to the suction port side are provided at the through port, and the detergent tank and the suction port An automatic detergent dispensing device characterized by connecting an outlet and a washing tub with pipes. 3. In an automatic detergent dosing device that dispenses detergent from a detergent tank to a washing tub, a cylindrical body with both ends closed, a cylindrical body rotatably supported coaxially within the cylindrical body with a predetermined gap in the radial direction; A first protrusion is formed on a part of the inner surface of the cylindrical body over the entire length in the axial direction and contacts the outer circumferential surface of the cylindrical body; a second protrusion that elastically contacts the circumferential surface; and a drive device that rotates the cylinder around an axis; An automatic detergent dispensing device characterized in that it has two through holes drilled on both sides of the part, one through hole is connected to a detergent tank, and the other through hole is connected to a washing tub through pipes.