JPH059476U - Washing machine - Google Patents

Abstract

(57) [Abstract] [Purpose] A washing machine that is safe and avoids wasting electricity because the power supply to the water supply valve is surely stopped after a predetermined time even when water is not supplied. provide. [Structure] A washing machine including a water supply valve 2 and a liquid level switch 20 that operates in accordance with a set amount of water in the washing tub 1, and the water supply valve 2 is automatically stopped based on a signal from the liquid level switch 20. In the machine, a timer 9 is provided in parallel with the water supply valve 2 to start counting upon energization of the water supply valve 2 and count up after a predetermined time, and the water supply valve 2 is controlled based on the count-up signal. A washing machine configured to stop.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a washing machine that includes a water supply valve and a liquid level switch that operates according to a set amount of water in a washing tub, and is configured such that the water supply valve is automatically stopped based on a signal from the liquid level switch.

[0002]

[Prior Art]

 In this type of washing machine, when the start button for washing is pressed while the tap is open, the water supply valve is energized to supply water to the washing tub, and the liquid level in the washing tub is set to the set level. When reaches, the water supply is stopped based on the signal from the liquid level switch, and the subsequent washing program is executed.

[0003]

[Problems to be solved by the device]

 However, in the above case, if the water tap remains closed or the water is cut off, the liquid level switch will not operate at any time and the water valve will remain energized for a long time, which is dangerous and wasteful. There was a problem of consuming electricity. The present invention has been made in view of the above problems, and even if the water supply is not performed, the power supply to the water supply valve is surely stopped after a predetermined time, and it is safe and wastes electricity wastefully. To provide a washing machine in which

[0004]

[Means for Solving the Problems]

 In this invention, in a washing machine configured to include a water supply valve and a liquid level switch that operates in accordance with a set amount of water in a washing tub, the water supply valve is automatically stopped based on a signal from the liquid level switch. In parallel with the water supply valve, a timer is provided which starts counting when power is supplied to the water supply valve and counts up after a predetermined time, and stops the water supply valve based on the count-up signal. Configured.

[0005]

According to this invention, the timer starts counting when the energization of the water supply valve is started, and the water supply valve is stopped based on the count-up signal output after a predetermined time, so that the water supply is actually performed. If not, the water supply valve will be stopped without fail.

[0006]

【Example】

 FIG. 1 is a simplified configuration diagram of a washing machine according to the present invention. 1 is a washing tub, 2 is a water supply valve, 3 is a water tap, 4 is a drain valve, 5 is a pulsator, 6 is a washing motor, 21 is an air trap chamber, Reference numeral 22 is a pressure hose, and 20 is a pressure switch (liquid level switch). The configuration including these elements is the same as the conventional configuration.

The circuit configuration having the characteristic configuration of the present invention will be described below together with the operation description. In the 13-washing timer, turning the timer 13 closes the main contact point 14. 19 Break The contact of the pressure switch 20 is normally open (when water is not entering) and closes when water enters and air pressure is applied. The relay coil 7 and the timer motor 15 are not energized until the contact 19 is closed, and the water supply valve 2 is energized through the relay contacts 17 and 11.

Here, if the tap 3 remains closed, or even if it is open and the water supply is cut off, water will not collect in the washing tub 1 forever, so the contact 19 will not close and the water supply valve 2 will It becomes the state of continuous energization. Therefore, in this invention, a timer 9 is provided in parallel with the water supply valve 2, and a contact 9a interlocking with the timer 9 and a relay coil 8 are provided in series with the contact 9a. Furthermore, a relay contact 11 that is switched by a relay coil 8 is provided in front of the water supply valve 2, and a buzzer 10 is provided on the NO side of this relay contact 11.

With such a configuration, when the water supply valve 2 is driven, the timer 9 starts counting, and when it counts up, the contact 9a is closed, the relay coil 8 is energized, and the relay contact 11 is switched to the NO side. As a result, the energization of the water supply valve 2 is cut off and the buzzer 10 is energized. Therefore, even if water supply is not actually performed due to forgetting to open the water tap 3 or running out of water, the power supply to the water supply valve 2 is surely stopped, and the buzzer 10 gives a warning to forget to open the water tap 3. Can be prevented.

When the contact 19 of the pressure switch 20 is closed, the relay coil 7 is energized, the contact 17 is switched to the NO side, the water supply valve 2 is not energized, and the motor timer 15 for controlling the washing time is used. Is energized. At this time, the contact 18 is also closed and the reversing cam switch 16 controls the washing motor 6.

[0011]

[Effect of the device]

 As described above, the timer starts counting when the drive signal is input to the water supply valve, and the water supply valve is stopped based on the count-up signal output after a predetermined time.Therefore, even when water supply is not actually performed. The water supply valve is reliably stopped, which increases safety and avoids wasting electricity.

[Brief description of drawings]

FIG. 1 is a simplified configuration diagram of a washing machine of the present invention.

FIG. 2 is a circuit configuration diagram of the washing machine of the present invention.

[Explanation of symbols]

 1 Washing tub 2 Water supply valve 9 Timer 20 Pressure switch (liquid level switch)

Claims (1)

[Claims for utility model registration] [Claim 1] A water supply valve and a liquid level switch that operates in accordance with a set amount of water in the washing tub are provided, and the water supply valve is automatically stopped based on a signal from the liquid level switch. In the washing machine configured as described above, a timer is provided in parallel with the water supply valve, which starts counting when power is supplied to the water supply valve and counts up after a predetermined time, and based on the count-up signal, the water supply valve. A washing machine configured to stop.