JPH04108088U - washing machine - Google Patents

Abstract

(57) [Summary] [Purpose] The washing machine of the present invention detects failure of the load detection sensor that detects the amount of laundry, stops the washing operation based on this detection, and removes water and electricity due to improper washing operation. ，Prevent wasting time. [Structure] A magnet is attached to the disk surface driven by the motor 5, and a rotation detection switch 11 is provided that detects the rotation speed of the rotating tub using the magnet.The amount of laundry is detected by the number of signals input from this switch 11. Processing unit (CP)
U) 15 is provided, and when the signal from the switch 11 is not input within a predetermined time, the CPU 15 activates the switch 11.
It is determined that there is a malfunction, the washing operation is stopped, and the alarm 33 is used to notify the abnormality.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention includes a load detection sensor that detects the amount of laundry, and the load detection sensor Controls the amount of water supplied and washing time based on the amount of laundry detected by the machine. This invention relates to a washing machine equipped with a circuit.

0002

[Conventional technology]

Traditionally, the amount (weight) of laundry to be washed has been estimated by the user based on feeling or experience. Use this as a guideline to determine the water level (water supply amount), washing time, and washing water flow during washing and rinsing. Washing operations such as washing and rinsing times were determined and laundry was carried out according to these washing operations, but Since it is difficult to estimate the exact amount of laundry to be washed, it is difficult to estimate the exact amount of laundry, so it is difficult to estimate the amount of water supplied, washing time, washing water flow, etc. Inappropriate selection may result in wasted water, electricity, and time, and may result in poor cleaning or rinsing. There was a shortage.

0003 In recent years, load (weight) detection sensors that detect the amount of laundry have been introduced. A control circuit is installed based on the amount of laundry detected by the load detection sensor. Automatically sets the optimal amount of water supply, washing time, washing water flow, etc., and uses the set washing operation. The washing machine is operated according to the amount of laundry, and the washing machine is optimally washed according to the amount of laundry, and water and electricity are used. This eliminates wasted time, washing, and insufficient rinsing.

0004

[Problem that the idea aims to solve]

However, if the washing machine is like the one above, the load detection sensor may fail due to breakage of the lead wire, etc. If the server malfunctions, the amount of laundry cannot be detected and the amount of water supplied is optimal for the amount of laundry. , it is not possible to set the washing time, etc., and due to inappropriate water supply amount, washing time, etc. This may result in wasted water, electricity, time, or insufficient washing or rinsing. The inconvenience of users continuing to use the load detection sensor without noticing that it has failed. A collision occurs.

[0005] This invention was created in view of the above problems, and is a method to detect the amount of laundry. Detects failure of the load detection sensor, stops washing operation based on this detection, and prevents improper washing. The purpose is to prevent waste of water, electricity, and time due to unnecessary washing operations. .

[0006]

[Means to solve the problem]

In order to achieve the above objectives, the washing machine of the present invention has the following features: A load detection sensor is installed to detect the amount of laundry. The water supply amount and washing time are adjusted based on the amount of laundry detected by the load detection sensor. A control circuit is provided to control the operation. An abnormality detection section is provided to detect a failure of the load detection sensor, The above-mentioned control circuit is provided to stop the washing operation based on the detection result of the abnormality detection section. .

[0007]

[Effect]

A washing machine with the above configuration detects the amount of laundry using a load detection sensor and uses a control circuit to detect the amount of laundry. The washing operation is performed with the optimum amount of water supply and washing time based on the amount of laundry. When the abnormality detection section detects a failure of the load detection sensor, the detection result is As a result, the control circuit stops the washing operation.

[0008]

【Example】

One embodiment of the washing machine of the present invention will be explained with reference to FIGS. 1 to 4. It is a water tank supported by the outer tank 3 of the washing machine by a holding rod 2, and there is a water tank 1 and an independent tank inside. It is equipped with a rotary tank 4 for dehydration. Reference numeral 5 denotes a motor that is installed on the outer surface of the bottom of the water tank 1 and drives the rotating tank 3. The motor 5 is connected via a belt transmission mechanism 7 and a pulley 6 provided on the rotating shaft 8 of the rotating tank 4. to rotate the rotating tank 4. Also, on the disc surface 9 of the pulley 6 on the counter-rotating tank side, a magnetic field is placed at an appropriate distance from the center. While the stone 10 is attached, the magnet 10 detects the rotation speed of the rotating tank 4. A rotation detection switch 11 consisting of a board switch is fixed to the bracket 1 as appropriate. 2 to a point on the locus of the magnet 10 so as to face the magnet 10 and not be in contact with it. Sea urchins are provided.

[0009] Figure 3 shows how this washing machine automatically moves from the wash process to the final spin process. A block diagram of a control unit for the system is shown.

0010 The control circuit 13 includes an electronic timer 14, a processing unit (CPU) 15, and a clock controller. control circuit 16; memory 17 storing control sequences for various washing processes; , input buffer control circuit 18 and output buffer control It is composed of a circuit 19.

[0011] The external input unit 20 includes a power switch 21 that supplies power to the entire device, and a power switch 21 that supplies power to the entire device, and 4. A lid switch that turns on when it detects the closed state of a lid (not shown) that can be opened and closed freely. 22. It turns on when it detects that the amount of washing water injected into the rotating tub 4 has reached the appropriate amount. Water level switch 23, program switch for selecting the combination of washing steps switch 24 and rotation detection switch 11, and the on or off state of each switch are conversion elements 25, 26, 27, 28 such as flip-flops attached to each switch. , 29 are converted to logical values “0” and “1” and input buffer control is performed. The signal is input to the circuit 18.

0012 The external output section 30 opens and closes when storing or draining washing water in the rotating tub 4. A drain valve 31, a water supply valve 32 that opens and closes when washing water is supplied to the rotary tub 4, a motor 5, It has an alarm 33 that notifies the end of washing, and has a drain valve 31, a water supply valve 32, and a motor. 5. The alarm 33 receives the signal output from the output buffer control circuit 19. Switching elements 34, 35, 36, 3 such as thyristors attached to each part in the No. The energization is controlled through 7.

[0013] In the above-described configuration, the arithmetic processing unit (CPU) 15 operates as the rotation detection switch 1. The amount of laundry (load) is detected based on how many times the signal from 1 is input within a predetermined time. water supply amount based on the amount of laundry, washing (rinsing) time, washing (rinsing) The control signals for water flow, etc. are read out from the memory 17, and the washing, water supply, etc. are carried out according to the control signals. , judgment of processes such as rinsing, dehydration, notification, etc., and the signals necessary to carry out these processes. is output to the output buffer control circuit 19, and the drain valve 31 and water supply valve 3 are 2. Control the motor 5 and alarm 33. Incidentally, the transition of these strokes is controlled by an electronic timer 14.

[0014] The number of signals input from the rotation detection switch 11 within a predetermined time is the amount of laundry If there is a lot of laundry, the number of signals will decrease because it is heavy, and if there is a small amount of laundry, the number of signals will decrease because it is light. Since the number of signals increases, it becomes possible to judge the amount of laundry by this number of signals, and it is possible to Washing operations can be performed with the amount of water supplied and washing time appropriate for the amount of laundry.

[0015] If the rotation detection switch 11 breaks down due to breakage of the lead wire, etc. The signal from the rotation detection switch 11 is output to the arithmetic processing unit (CPU) 15 within a predetermined time. , and the arithmetic processing unit (CPU) 15 determines that the rotation detection switch 11 is malfunctioning. The washing process is stopped, and an alarm 33 is used to notify of an abnormality.

[0016]

[Effect of the idea]

Since the washing machine of the present invention has the above-mentioned configuration, there is no possibility of failure due to load detection sensor failure. It can prevent improper washing operations, wasting water, electricity, time and washing, soot. This can prevent shortages.

[Brief explanation of drawings]

FIG. 1 is a schematic sectional view showing an embodiment of a washing machine of the present invention.

FIG. 2 is an enlarged view of main parts of the washing machine of the present invention.

FIG. 3 is a block diagram showing a control circuit of the washing machine of the present invention.

FIG. 4 is a flowchart illustrating the operation of the washing machine of the present invention when an abnormality is detected.

[Explanation of symbols]

10 magnet 11 Rotation detection switch 13 Control circuit 15 Arithmetic processing unit 17 Memory 33 Alarm

Claims (1)

[Scope of utility model registration request] Claim 1: A laundry machine comprising: a load detection sensor that detects the amount of laundry; and a control circuit that controls washing operations such as water supply amount and washing time based on the amount of laundry detected by the load detection sensor. A washing machine comprising: an abnormality detection section for detecting a failure of the load detection sensor; and the control circuit for stopping the washing operation based on a detection result of the abnormality detection section.