JPS6135191Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an operating circuit for a so-called one-tub type washing machine that also performs dehydration and dehydration.

Traditionally, dehydrating and dehydrating washing machines have been equipped with a rotating tank that functions as a washing tub and a dehydrating tank inside the outer box, and a stirring blade is installed at the bottom of the rotating tank, and washing and rinsing are carried out by rotating the stirring blade. There is a so-called one-tank type machine that performs a dewatering process that also serves as drainage, in which the washing water in the rotating tub is pumped up and discharged into the outer box from the upper part by rotating the rotating tub. It is provided. However, when the drainage condition of such a washing machine with dehydrating function deteriorates due to forgetting to turn down the drain hose that discharges the washing water discharged into the outer box to the outside, or because the drain hose becomes clogged, etc.
As the washing operation progresses, such as washing, spin-drying, rinsing, and spin-drying, a large amount of wash water will remain in the outer box, and during the spin-drying process, the wash water will stop rotating the rotating tub. There is a problem that the drive motor that drives the rotating tub becomes overloaded, and the washing water inside the outer box becomes overloaded. There is a problem in which water rises abnormally and overflows to the outside from the opening on the top surface, resulting in an abnormal overflow situation. For this reason, conventionally, during the dehydration process, first a first dehydration circuit is formed that is unrelated to the water level switch that detects the water level in the rotating tank, and after a predetermined time, a timer switch is used to switch the first dehydration circuit to the water level. A second dewatering circuit is formed on the condition that the switch is in double return mode, and if the drainage conditions are poor, washing water remains in the outer box and the rotation of the rotating tub is obstructed. When the water is not sufficiently discharged, the washing operation is stopped by taking advantage of the fact that the water level switch does not return and the second dewatering circuit is not formed. However,
In the conventional configuration described above, since the rotary tub is rotated by both the first and second dewatering circuits, for safety reasons, a lid switch that is linked to the laundry entrance/exit lid on the upper surface of the outer box is required. Therefore, it is necessary to provide two lid switches, which increases the cost, and since the two lid switches must be opened and closed at the same time, the structure becomes complicated and there is a risk of failure. There was a simple drawback.

The present invention was developed in view of the above circumstances, and its purpose is to configure a circuit for detecting poor drainage conditions by using only one lid switch even in a one-tank type; To provide an operating circuit for a dehydrating and washing machine capable of reducing the cost of a lid switch, simplifying the structure of the lid switch, and improving reliability.

An embodiment of the present invention will be described below with reference to the drawings.

First, the structure of the dehydrating and washing machine will be described with reference to FIGS. 1 and 2. Reference numeral 1 denotes an outer box, the inside of which is partitioned into upper and lower parts by a partition plate 2, and a rotating tank 4 is disposed in an upper chamber 3 to be used as an outer tank. The rotating tank 4 has a non-porous tapered shape that gradually expands upward, and is configured to pump up the water inside by rotational centrifugal force and discharge it into the chamber 3 from an upper end opening that is an upper part. And room 3
The water discharged inside is discharged to the outside from a drain port 2a formed in the partition plate 2 via a drain hose 5. On the other hand, reference numeral 6 denotes a suspension mechanism that swingably supports the rotary tank 4, and the dewatering shaft 9 of the rotary tank 4 is inserted into the housing 8 fixed to the upper part of the base plate 7, as shown in FIG. I support it. Reference numeral 10 denotes a washing shaft inserted and supported by the dewatering shaft 9, and a stirring blade 11 disposed at the inner bottom of the rotating tank 4 is directly connected to the upper end of this shaft. And drive motor 1
2 (see FIG. 3) is transmitted to the pulley shaft 14 by the belt transmission mechanism 13.
is rotated by the action of the clutch mechanism 15.
Wash shaft 10 during rinsing and spin shaft 9 during dehydration
It is now being selectively transmitted to Reference numeral 16 denotes a brake device for braking the rotating tank 4, which uses an electromagnetic device 17 (see FIG. 3) as its operating source. The electromagnet device 17 is also used as an operating source for the clutch mechanism 15, as is well known in the art. 1
Reference numeral 8 denotes a casing fitted to the upper end of the housing 8 , whose upper and lower openings are sealed by seals 19 , 19 that are in sliding contact with the dehydrating shaft 9 , and whose interior is sealed by a hole 9 a in the peripheral wall of the dehydrating shaft 9 and a hole 9 a in the circumferential wall of the dehydrating shaft 9 . It communicates with the inside of the rotary tank 4 through the hollow interior of the rotary tank 4, so that the communication is maintained at all times regardless of the rotation of the rotary tank 4. A first pipe 20 corresponds to a water level detection path, and one end thereof is connected to the casing 18, and the other end is connected to the water inlet body 21a of the drain valve 21. A branch port 21b is provided protruding from the water inlet body 21a of the drain valve 21, and the first pipe 20 communicates with the air trap 23 via the branch port 21b and a bellows pipe 22 connected thereto. The air trap 23 is connected to the operation box 2 via the tube 24.
It communicates with the water level switch 26 in 5. In addition, the valve body 27 of the drain valve 21 is connected via a valve stem 28 and a tension spring 29 to an electromagnetic device 17 of the brake device 16, so that the electromagnetic device 17 is connected to the clutch mechanism 15, the brake device 16 and the drain valve. It functions as a source of operation for 21 of the three parties. 30
is a bellows-shaped second pipe corresponding to a residual water discharge channel, one end of which is connected to the water outlet body 21c of the drain valve 21, and the other end connected to the drain port 2a of the chamber 3 of the outer box 1.
It is connected to a socket 2b which is branched into the opening 2b.

Now, the configuration of the electric circuit will be described according to FIG. 31 and 32 are power supply terminals, and power supply lines 33 and 34 are connected to these, respectively. 3
Reference numeral 5 denotes a water supply solenoid valve, which opens when energized to supply water into the rotating tank 4. The drive motor 12 has motor coils 36, 37 and a capacitor 38, and rotates in the forward direction when the forward rotation terminal 12a is energized, and rotates in the reverse direction when the reverse rotation terminal 12b is energized. The water level switch 26 is composed of a changeover switch having a movable contact piece c and fixed contact pieces a and b, and when the water level in the rotating tank 4 reaches a specified water level, the water level switch 26 switches between the contact pieces (ca), which are the actuating side contact pieces. When the water level reaches a return water level significantly lower than the specified water level, the contact piece (c-b) between the return side contact pieces is returned to be closed. Reference numeral 39 denotes a lid switch, which is opened and closed in conjunction with the opening and closing of a laundry entrance/exit lid (none of which is shown) formed on the upper surface of the outer box 1, which is the upper part of the rotary tub 4. It's summery. 40 is a timer, which has a timer motor 41 and timer switches 42 to 50 that open and close according to the rotation of the timer motor 41 as shown in the time chart of FIG. In this case, the timer switches 42 to 49 are comprised of changeover switches having a movable contact piece c and fixed contact pieces a and b. As is clear from the time chart shown in FIG. 4, the timer 40 has a "standard course,""savingcourse,""washing only course," and "draining only course," each of which has its own areas. It is now possible to set 51 is a buzzer,
52 and 53 are manual switches. The drive motor 12 as a load, the electromagnet device 17, the water supply solenoid valve 35, the timer motor 41, and the buzzer 51
The water level switch 2 is installed between the power lines 33 and 34.
6, the lid switch 39, timer switches 42 to 50, and manual switches 52 and 53 are connected as shown in FIG. 3. In the electric circuit shown in FIG. The contact pieces (c-b) of the abnormality detection timer switch 46 are connected in parallel between the contact pieces (c-b), and the dehydration side of the timer switch 44 for switching between washing, rinsing and dehydration is connected in parallel between the contact pieces (c-b). A feature is that a lid switch 39 is connected between the fixed contact piece b and the fixed contact piece b of the abnormality detection timer switch 46.

Next, the operation of this embodiment will be explained.

When the timer 40 is set to the "wash" stroke of the "standard course", "wash", "intermittent spin", "spin", "rinse", "intermittent spin", "spin", "rinse", "finish" ”, “intermittent dehydration” and “dehydration” are automatically carried out, and when the timer 40 is set to the “wash” process of the “savings course”, the “wash” and “intermittent dehydration” processes are automatically performed. "dehydration", "dehydration",
A washing operation consisting of the steps of ``rinsing'', ``finishing'', ``intermittent dehydration'', and ``dehydration'' is performed automatically, but these operations are explained in the electrical circuit diagram in Figure 3 and in Figure 4.
Since it is clear from the time chart in the figure and is well known, a detailed explanation will be omitted, and the "dehydration" process, which is directly related to the gist of the present invention, will be explained below. When the timer 40 shifts to the "dehydration" process of the "standard course" or "saving course", the timer switch 42 between the contacts (ca), the timer switch 44 between the contacts (c-b), and the lid switch 39 ，
The contact piece of the timer switch 46 for abnormality detection (b-
c) Contact piece of timer switch 43 (b-c)
During this time, an energizing circuit for the forward rotation terminal 12a of the drive motor 12, that is, a first dehydration circuit is formed between the contacts (c and b) of the timer switch 45 and between the contacts (c and a) of the timer switch 47. , the drive motor 1
2 rotates in one direction, that is, in the forward direction. In this case, the energizing circuit for the electromagnet device 17 is formed between the contacts (c and b) of the timer switch 45, so that the drain valve 21 is opened and the drive motor 12 is activated by the action of the clutch mechanism 15. The rotation is now transmitted to the rotating tank 4 via the dehydration shaft 9,
The rotating tub 4 is rotated forward at high speed, and the washing water inside is pumped up by the centrifugal force of the rotation and flows into the chamber 3 from the top opening.
released within. Of course, at this time, since the energizing circuit for the timer motor 41 is formed between the contact pieces (b and c) of the timer switch 43, the timer 40 performs a timing operation. Therefore, when the drain hose 5 is placed at a drainage location and the drain hose 5 is in a normal draining state without any blockages, the washing water discharged into the chamber 3 is discharged to the outside through the drain port 2a and the drain hose 5. It will be expelled quickly,
Washing water will not remain in the chamber 3. Thereafter, when this dehydration operation that also serves as drainage is carried out for a predetermined period of time, the abnormality detection timer switch 4 is activated.
6 opens the contact piece (c-b) and connects the contact piece (c-b).
a) The first dehydration circuit is turned off because the neutral state is also opened. However, at this time, due to the above-mentioned normal drainage state, the washing water in the rotary tub 4 has been drained or dehydrated below the return water level, and therefore the water level switch 26 is set to the contact point (c-a). ) is returned to open and the contact piece (c-b) is closed. As a result, the contact piece (c-
Between a) and timer switch 44 contact piece (c-b)
between the lid switch 39, the return side contact piece (b-c) of the water level switch 26, the timer switch 43 contact piece (b-c), and the timer switch 45.
A circuit for energizing the normal rotation terminal 12a of the drive motor 12 through the contact piece (c-b) of Driving continues.

In addition, in the first "rinsing" process of the "standard course", if the manual switch 53 has been closed in advance, the contact piece (c) of the timer switch 42
-a), the contact piece of the timer switch 44 (c-
Between a), contact piece of timer switch 46 (c-a)
time, manual switch 53 and timer switch 48
The energizing circuit of the water supply electromagnetic piece 35 unrelated to the water level switch 26, that is, the first
Since a water injection circuit is formed, so-called overflow rinsing, in which rinsing is performed while pouring water into the rotary tank 4, is performed. Of course, if the manual switch 53 has been opened in advance, the same reservoir rinsing as in the "washing" process is performed.
In addition, in the first half of the second "rinsing" step of the "standard course" and the first half of the "rinsing" step of the "saving course", the manual switch 5 is turned off as described above.
3 has been closed in advance, the first water injection circuit performs overflow rinsing. On the other hand, in the second half of the second "rinsing" process of the "standard course" and the second half of the "rinsing" process of the "saving course", between the contacts (ca) of the timer switch 42, The water level switch 26 and the manual switch are connected between the contact pieces (c-a) of the timer switch 44, between the contact pieces (c-b) of the abnormality detection timer switch 46, and between the contact pieces (c-a) of the timer switch 48. An energizing circuit for the water supply electromagnetic valve 35 unrelated to the water supply solenoid valve 53, that is, a second water injection circuit is now formed, and rinsing is performed by overflow.

On the other hand, in the washing operation using the above-mentioned "standard course" or "saving course", if the drainage conditions are poor such as forgetting to turn down the drain hose 5 or the drain hose 5 is clogged, the "wash" or "intermittent spin" As the washing operation progresses through steps such as ",""dehydration," and "rinsing," the washing water discharged from the rotary tub 4 into the chamber 3 is not discharged to the outside but is stored in the chamber 3.
The water level in the rotating tub 4 becomes abnormally high, and the rotation of the rotating tub 4 is inhibited in the next "dewatering" process, and the rotation of the rotating tub 4 does not increase. Not enough water will be released. In such a case, the present embodiment operates as follows. That is, the timer 40 indicates "dehydration".
When the process starts, as described above, the rotary tank 4 is first rotated by the first dehydration circuit to start the dehydration operation, and after a predetermined time, the contact piece of the abnormality detection timer switch 46 interposed in the first dehydration circuit is turned off. (c-
b) The gap is opened and the first dehydration circuit is cut off. At this time, the discharge of washing water from the rotating tub 4 is insufficient and more washing water remains in the rotating tub 4 than the return water level, so the water level switch 26 does not return and the contact piece (c -b) and open the contact piece (c-
a) remain in the operating state with the gap closed;
Therefore, the second dewatering circuit that passes between the contact pieces (c and b) on the return side of the water level switch 26 is not formed, and all the load energizing circuits are cut off and the washing operation is stopped. It turns out.

By the way, set timer 40 to "drain only course"
When set to
-c) and the contact piece of the timer switch 45 (c-
b) An energizing circuit for the electromagnet device 17 is formed through the gap, and the drain valve 21 is opened. And rotating tank 4
When water is poured into the rotary tank 4 using an appropriate means such as a bucket, the water flows into the dewatering shaft 9, the hole 9a, the casing 18, the pipe 20, along with the earth and sand accumulated at the inner bottom of the rotating tank 4.
It is now drained to the outside via the drain valve 21, pipe 30, drain port 2a, and drain hose 5. Therefore, this "drain only course" is suitable for discharging dirt, etc. that has accumulated at the inner bottom of the rotating tank 4. Suitable.

As is well known, when the timer 40 is set to the "wash only course", the "standard course" is set.
Alternatively, only the washing process similar to the "washing" process in the "savings course" is performed.

According to this embodiment, the timer 40 is provided with an abnormality detection timer switch 46 that closes the contact piece (c-b) during the "dehydration" process and opens during the "dehydration" process. The contact pieces (c-b) of the abnormality detection timer switch 46 are connected in parallel between the return side contact pieces (c-b) of the water level switch 26, and the lid switch 3 is
9 and abnormality detection timer switch 46 contact piece (b
-c) to form a first dehydration circuit, and after opening the contacts (c-b) of the abnormality detection timer switch 46, the lid switch 39 and the water level switch 26
Since the second dewatering circuit is formed between the contact pieces (b and c) which are the return side contact pieces, if washing water remains in the chamber 3 due to poor drainage conditions, Since the washing water in the rotary tub 4 is not sufficiently discharged and the water level switch 26 does not return, the second dewatering circuit is not formed and the washing operation is stopped. By simply using this, it is possible to create a circuit configuration that detects bad drainage conditions, and compared to the conventional method that uses two lid switches, the cost of the lid switch 39 becomes cheaper and the structure of the lid switch 39 becomes simpler. Moreover, since the structure is simplified, failures of the lid switch 39 are reduced, and reliability can be improved.

Further, according to this embodiment, the contact piece (c-b) of the abnormality detection timer switch 46 is cleaned during the second half of the second "rinsing" process in the "standard course" and in the "rinsing" process in the "saving course". '' is closed in the latter half of the stroke and overflow rinsing is performed by forming a water injection circuit through this contact piece (c-b), so a water injection circuit for overflow rinsing is formed. There is no need for a dedicated timer switch for this purpose, and in addition to the fact that only one lid switch 39 is required, there is an advantage that the circuit configuration is simpler than the conventional one.

It should be noted that the present invention is not limited to the embodiments described above and shown in the drawings, but includes, for example, the "saving course,""washing only course," and "draining only course."
It goes without saying that the invention may be modified and implemented as appropriate without departing from the spirit of the invention, such as by providing it as necessary.

As explained above, the present invention includes a water level switch that detects the water level in the rotating tank, closes the contact between the operating side contacts when the water level reaches a specified level, and closes the contact between the return side contacts when the water level reaches the return water level, and a plurality of water level switches. Washing by rotating a stirring blade in the rotary tank after water is supplied into the rotary tank in cooperation with a timer having a timer switch, and washing water in the rotary tank by driving the rotary tank to rotate. In a so-called single-tank washing machine that automatically performs processes such as dewatering, which also serves as drain discharged from the upper part, and rinsing, which is substantially similar to the above-mentioned washing, the timer is set to close during the spin-drying process. An abnormality detection timer switch that opens during the water level switch is provided, and this abnormality detection timer switch is connected in parallel between the return side contacts of the water level switch, and during the dehydration process, the abnormality detection timer switch is connected to the lid of the upper part of the rotating tank. A first dehydration circuit is formed through the lid switch that opens and closes and the abnormality detection timer switch, and after the abnormality detection timer switch is opened, a first dehydration circuit is formed through the return side contact piece of the lid switch and the water level switch. Since the structure is configured to form two dewatering circuits, even if it is a one-tank type, it is possible to configure a circuit that detects bad drainage conditions by just using one lid switch. It is possible to provide an operating circuit for a dehydrating and washing machine which can reduce the cost, simplify the structure of the lid switch, and improve reliability accordingly.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIGS. 1 and 2 are an overall longitudinal sectional side view and a partially enlarged longitudinal sectional side view of the dehydrating and washing machine; FIG. 3 is an electrical circuit diagram; and FIG. 4 is a timer diagram. It's a chat. In the drawing, 1 is an outer box, 4 is a rotating tank, 5 is a drain hose, 11 is a stirring blade, 12 is a drive motor, 17 is an electromagnet device, 21 is a drain valve, 26 is a water level switch,
35 is a solenoid valve for water supply, 39 is a lid switch, 40 is a timer, and 46 is a timer switch for abnormality detection.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A water level switch that detects the water level in the rotating tank and closes the contact between the operating side contacts when the water level reaches a specified level, and closes the contact between the return side contacts when the water level reaches the return water level, and a plurality of water level switches. Washing by rotating a stirring blade in the rotating tank after water is supplied into the rotating tank in cooperation with a timer having a timer switch, and pumping washing water in the rotating tank by driving the rotating tank to rotate. In a dehydrating and washing machine that automatically performs processes such as dewatering and draining discharged from the upper part of the perilla, and rinsing that is substantially similar to the above-mentioned washing, the timer is set to close during the dehydration process and to open in the middle of the dehydration process. An abnormality detection timer switch is provided, and the abnormality detection timer switch is connected in parallel between the return side contacts of the water level switch, and a lid switch is provided that opens and closes in conjunction with the lid of the upper part of the rotating tank during the dewatering process. A first dehydration circuit is formed through the abnormality detection timer switch, and after the abnormality detection timer switch is opened, a second dehydration circuit is formed through the return side contact piece of the lid switch and the water level switch. The operating circuit for a dehydrating and washing machine. 2. The operating circuit for a washing machine with a dehydrating function as set forth in claim 1, wherein the abnormality detection timer switch is closed even during the rinsing process to form a water injection circuit.