JPH0523800B2 - - Google Patents

Description

[Detailed description of the invention]

(a) Industrial Application Field The present invention relates to a washing machine. (B) Prior Art As a conventional example, a washing machine having a detection means for detecting the water temperature of the washing machine and determining the water temperature rank, and a control means for adjusting the washing time based on a signal from the detection means is disclosed in Japanese Patent Application Laid-open No. It is disclosed in Publication No. 56-66394. (c) Problems to be Solved by the Invention In the conventional example, the temperature is not taken into account, so it is not suitable for dehydration control. In other words, in the dehydration process, the higher the temperature, the higher the natural drying rate.
Air temperature should be more important than water temperature. However, if only the temperature is considered, if boiling water is used before the spin-drying process, the tank may become deformed during spin-drying, and if the temperature difference between indoors and outdoors is large, it may be difficult to dry laundry outdoors. You may be under dehydrated even though it's cold, or over dehydrated even though it's warm. The present invention relates to improvements in washing machines and is intended to solve these problems. (d) Means for Solving the Problems The washing machine of the present invention includes an air temperature detection device that detects the air temperature, a water temperature detection device that detects the water temperature in the tank, and a water temperature detection device that detects the water temperature when the water temperature data from the water temperature detection device is less than a predetermined value. If so, means for performing dehydration control based on temperature data from the temperature sensing device, and means for performing predetermined dehydration control other than the dehydration control when the water temperature data from the water temperature sensing device is equal to or higher than the predetermined value. The control device is equipped with a control device having the following functions. Further, the washing machine of the present invention includes an air temperature detection device that detects the air temperature, a water temperature detection device that detects the water temperature in the tank, and water temperature data from the water temperature detection device.
means for performing dehydration control based on the temperature data from the temperature detection device when the temperature data from the temperature detection device is lower; and means for controlling the dehydration when the temperature data is higher than the water temperature data; and a control means having means for performing predetermined dehydration control other than the control. (E) Effect That is, for example, if the water temperature data is above a predetermined value, there is a high possibility that hot water was used as the washing water, so dehydration is performed weakly so that the dehydration rotation is not deformed in the tub. Also, if the temperature data is higher than the water temperature data, the outdoor temperature may be low, so dehydration should be performed more vigorously. (f) Embodiments Examples of the present invention will be described based on the drawings. In the fully automatic washing machine shown in Figure 1, 1 is the machine frame, 2
3 is an outer tank installed inside the machine frame 1; 4 is installed inside the outer tank 3;
An inner tank serving as a washing and dehydrating layer having dehydration holes 5 around the periphery, 6 a rotating blade disposed at the bottom of the inner tank 4, 7
A drive motor is connected to the inner tub 4 and the rotor 6 via a power transmission mechanism 8, and rotates the rotor 6 during washing, and rotates both the inner tub 4 and the rotor 6 at high speed during dewatering. 9 is a drain port provided at the bottom of the outer tank 3, 10 is a drain electrode valve, 11 is a drain hose, 12
An air trap is provided at one corner of the bottom of the outer tank 3, and is connected to a pressure switch 13 in the operating section 2 via a pressure hose 14. 15 is a water supply solenoid valve provided in the water supply channel 16, and 17 is a negative characteristic thermistor as a temperature sensor attached to the bottom of the air trap 12, which detects the water temperature when the aircraft is submerged in water, and detects the air temperature inside the aircraft when it is not submerged in water. Detect. FIG. 2 shows various light emitting diodes (hereinafter referred to as LEDs) arranged on the front panel 2a of the operation section 2.
group and operation button group, 18 is a washing time setting button,
19 is a rinsing number setting button, 20 is a dehydration time setting button, 21 is a water flow intensity setting button, 22 is a selection button for whether or not to perform water rinsing, 23 is a standard course or a favorite course in which you manually enter each process time The setting and start button 24 is the start button for setting the speedy course, which completes the entire process in 23 minutes, and the numeral 25 is a stop button for temporary stopping. The various operation buttons mentioned above include
Each has a corresponding LED, which turns on and off as appropriate depending on the operation. Reference numeral 26 is a display unit for the temperature rank detected by a temperature detection device described later, and LEDs 26a and 26a are used to indicate high temperature, medium temperature, and low temperature, respectively.
26b and 26c light up. FIG. 3 shows a block circuit diagram of the control section, 27
corresponds to a control device, and is a microcomputer (hereinafter referred to as microcomputer) that plays a central role in control. The microcomputer 27 includes an input section 28 consisting of a group of various operation buttons, a safety switch 29 that is linked to opening and closing of the top cover, and the pressure switch 1 as a water level detection means.
3. Temperature detection device 32 using the reset circuit 30, clock circuit 31, and temperature sensor 17
Based on this information, various display circuits 33 composed of light emitting diodes, motor left and right rotation drive circuits 34, 35, supply and drain solenoid valve drive circuits 36, 37, and the LEDs 26a, 26 are input.
It controls the operation of the temperature rank display circuit 38 and the buzzer circuit 39 that drive the temperature rank display circuit 38 and the buzzer circuit 39 that drive the temperature rank display circuit 38 and the temperature rank display circuit 38 that drive the temperature rank display circuit 38 and the buzzer circuit 39, respectively. Next, the temperature detection device 32 will be explained in detail based on FIG. 4. The resistance value of the thermistor 17 changes depending on the water temperature (or air temperature), and the voltage determined by the resistance value of the thermistor 17 and the voltage divided by various resistors are connected to comparators 40 and 4.
Compare numbers 1, 42, and 43. This comparison output is input to the input ports P ₁ , P ₂ , P ₃ , and P ₄ of the microcomputer 27, respectively, and the microcomputer 27 receives the output based on the state of the signal input to each input port as shown in Table 1. , determine the rank of water temperature (or air temperature).

[Table] The temperature ranks X to D correspond to the temperature rank display circuits 38, respectively, and the microcomputer 27
If the determined temperature rank is X or A, the low temperature LED 26C is selected, and if the determined temperature rank is B, the medium temperature LED 26b is selected.
And if it is C or D, the high temperature LED 26a is turned on. The operation will be explained based on this configuration. First, the washing process is performed by the operator's washing operation using the setting button 18: 12 minutes of washing, 6 minutes of washing, 3/3 of washing.
One of the types of steps is executed. Also,
The execution time of each step is automatically changed according to the temperature rank to which the water temperature detected by the temperature detection device 32 belongs, as shown in Table 2.

[Table] The water temperature is detected immediately after water supply is completed and when motor 7
This is done every 2 minutes from the time of startup (however, during the rinsing process, this is done only once when the motor is started). in this case,
The time may be changed as appropriate depending on the change in temperature rank, or may be controlled based on the first detection result. Next, in order to control the dehydration process, the microcomputer 27 first detects the temperature immediately after the power is turned on or when the process time is changed after a temporary stop by the stop button 25, and determines the temperature rank at this time. Store it as data (do not apply it as temperature data in cases other than the above). However, when the water level switch 13 is in the set state (drainage is not completed), the standard B rank is stored as temperature data. Now, in the dehydration step, either one of the three types of dehydration steps, 6 minutes of dehydration, 3 minutes of dehydration, and 1 time of dehydration, is executed by the operator's selection operation using the setting button 20. Then, the microcomputer 27 appropriately changes the selected process time as shown in Table 3 based on the temperature data stored in advance. That is, the higher the temperature, the shorter the dehydration time.

[Table] The above is general dehydration control, but in the following exceptions, control will be performed accordingly. (a) In the washing or rinsing step before the dehydration step,
If you use hot water of 40℃ or higher in your washing machine (if the temperature detected by the temperature detection device 32 is rank D), there is a risk that the tub will deform if you perform strong dehydration. The dehydration is performed at the dehydration time based on the temperature rank shown in Table 3 regardless of the temperature data set, and the power control element of the motor clockwise rotation drive circuit 34 is
As shown in the figure, the rotational speed is lowered than normal by operating intermittently. Incidentally, in this example, T ₁ = 15 seconds, T ₂ = 5 seconds, and the rotation speed is
It has been lowered from 900rpm (normal) to 600rpm. (b) In general, in winter and in cold regions, washing machines are often used indoors because there is a risk of freezing at night. At that time, if the room is heated, the temperature inside the room will be as high as in summer, and the dehydration time will be controlled to be shorter than usual (dehydration will be performed at a high temperature rank). However, since laundry is dried outdoors at a low temperature, if the dehydration rate is weak, drying becomes even more difficult. Therefore, since the tap water used during the water injection rinsing process (rinsing is performed while pouring water and overflowing it) before the dehydration process is close to the outdoor temperature, the microcomputer 27
The temperature data is compared with the water temperature data input before the dehydration step, and if the rank of the temperature data is on the higher temperature side, dehydration is performed based on the temperature rank regardless of the temperature data. The operations of (a) and (b) above are shown in FIG. In this embodiment, the water temperature and air temperature ranks are each classified into three levels, but by further classifying the ranks, it is possible to perform more detailed process control according to the rank difference between the air temperature data and the water temperature data. It is possible. Also, during the washing and rinsing process, the above-mentioned
As mentioned in cases (a) and (b), when there is a large difference between the water temperature and the air temperature, the temperature of the washing water will rise (or fall) during washing due to the influence of the air temperature, so simply using the water temperature data It would be more effective to control the process based on the rank difference between the water temperature rank and the air temperature rank, for example, instead of using only the water temperature rank. By the way, since the dehydration process is controlled based on air temperature data, there is no need to display water temperature data. Therefore, during this step, the temperature rank display section 26 performs a display based on air temperature data instead of the water temperature display up to that point. This allows the user to correctly recognize the current temperature control state. Also, during temperature detection, each of the display sections 26
The LEDs 26a, 26b, and 26c turn on and off at 0.5 second intervals to notify the user that detection is in progress. The above explanation is based on the "optional course" in which the user arbitrarily sets the time for each process, and the "speedy course" and "standard course".
In this case, when each of the start buttons 23 and 24 is operated, the process time is automatically set. In addition, in this example, even if the operator sets the washing time to 12 minutes, depending on the water temperature, the washing may be performed for 14 minutes.
Since the set time and actual execution time may differ, an LED may be added separately to notify that the execution time is being changed due to water temperature. (G) Effects of the Invention According to the configuration of the washing machine of the present invention, not only can dehydration be performed appropriately depending on the temperature, but also deformation of the tub due to spin-driving after using hot water can be prevented. Further, according to the configuration of the washing machine of the present invention, since the temperature difference between indoors and outdoors is determined based on the difference in rank between water temperature data and air temperature data, accurate dehydration control that does not rely solely on air temperature can be performed.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of the internal mechanism of a fully automatic washing machine embodying the present invention; Fig. 2 is a front view of the operating section;
Figure 3 is a block circuit diagram of the control section, Figure 4 is an electric circuit diagram of the temperature detection device, Figure 5 is a time chart showing the state of energization to the motor when rotating the inner tank intermittently, and Figure 6. is a flowchart showing the operation. 3...Outer tank, 4...Inner tank (washing and spin-drying tank), 2
7... Microcomputer (control device), 32
...Temperature detection device (air temperature detection device and water temperature detection device).

Claims (1)

[Scope of Claims] 1. In a washing machine that performs each process of washing, rinsing, and dehydration according to a program, an air temperature detection device that detects the air temperature, a water temperature detection device that detects the water temperature in the tank, and this water temperature detection device are provided. means for performing dehydration control based on temperature data from the air temperature detection device when water temperature data from the device is less than a predetermined value; and means for performing dehydration control when the water temperature data from the water temperature detection device is equal to or higher than the predetermined value. 1. A washing machine comprising: a control device having means for performing predetermined dehydration control other than the above. 2. In a washing machine that proceeds through the washing, rinsing, and spin-drying processes according to a program, there is an air temperature detection device that detects the air temperature, a water temperature detection device that detects the water temperature in the tank, and a water temperature detection device that detects water temperature from the water temperature detection device. , means for performing dehydration control based on the temperature data from the temperature detection device when the temperature data from the temperature detection device is lower; and means for performing dehydration control based on the temperature data from the temperature detection device when the temperature data is higher than the water temperature data; 1. A washing machine comprising: a control means having means for performing predetermined dehydration control other than dehydration control.