JPH0141353B2 - - Google Patents

Description

[Detailed description of the invention]

(a) Industrial Application Field The present invention relates to a dehydrator. (B) Prior Art As a conventional example, a washing machine having a detection means for detecting the water temperature during washing 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. 55-66394. That is, the washing time is determined according to the temperature of the washing water. However, in controlling the dehydration process, it is necessary to emphasize air temperature rather than water temperature, since the higher the outside temperature, the higher the natural drying rate. (c) Problems to be Solved by the Invention The dehydrator of the present invention performs appropriate dehydration in consideration of the temperature. (d) Means for solving the problems The dehydrator of the present invention includes an air temperature detection device that detects the air temperature, and a control device that controls the dehydration process based on a detection signal from the temperature detection device. It is. (e) Effect Generally, one of the performance evaluations of a dehydrator is the dewatering rate. This dehydrator has a dehydration rate = (weight of dry cloth) / (weight of cloth after dehydration) x 100%, and this obviously depends on the centrifugal force of the dehydration tank and the dehydration time. The effect of temperature cannot be ignored because the higher the temperature, the higher the natural drying rate. Therefore, the higher the temperature, the more control is performed to shorten the dehydration time. (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 tank 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 solenoid 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 the rinse number setting button, 20 is the dehydration time setting button,
21 is the water flow intensity setting button, 22 is the selection button for whether or not to rinse with water, 23 is the setting and start of the standard course or a favorite course where you manually input the time for each process, and 24 is the entire process in 23 minutes. A speedy course setting/start button, 25 is a stop button for a fixed stop. Each of the above operation buttons has a
It is compatible with LED, which turns on and off as appropriate depending on the operation. 26 is a display section for the temperature rank detected by the temperature detection device described later, and LEDs 26a, 26b,
26c lights 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 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 sensing 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 selected by the operator 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 controlling 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 the temperature rank at this time is determined from the air temperature data. (In cases other than the above, it is not applied as temperature data.) However, if the water level switch 13 is set (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. That is, (a) In the washing or rinsing process before the dehydrator process, if hot water of 40°C or higher is used as the washing liquid (if the temperature detected by the temperature detection device 32 is D rank), intense dehydration will occur. If this is done, there is a risk that the tank may be deformed, so in that case, dewatering should be performed using the dewatering time based on the temperature rank shown in Table 3, regardless of the stored temperature data, and the power of the motor clockwise rotation drive circuit 34 should be By intermittently operating the control element as shown in FIG. 5, the rotational speed is lowered than normal. Incidentally, in this embodiment, T ₁ =15 seconds, T ₂ =5 seconds, and the rotational speed is lowered from 900 rpm (normal) to 600 rpm. (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
compares the air temperature data with the water temperature data input before the dehydration process, and if the rank of the air temperature data is on the higher temperature side, dehydration is performed based on the air temperature rank regardless of the air temperature data. 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 for the case where the user executes the "favorite course" in which each process time is arbitrarily set, and in the case of the "speedy course" and "standard course", each start button 23, 24 is pressed. When operated, the process time is automatically set. In addition, in this embodiment, even if the user sets the washing time to 12 minutes, the washing may be performed for 14 minutes depending on the water temperature.
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 The dehydrator of the present invention controls the dehydration process by taking into account the air temperature, which has a greater influence on the dehydration rate than the water temperature, so that insufficient dehydration or excessive dehydration is unlikely to occur.
Appropriate dehydration can be performed.

[Brief explanation of drawings]

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;
FIG. 3 is a block circuit diagram of the control section, FIG. 4 is an electric circuit diagram of the temperature detection device, and FIG. 5 is a time chart showing the state of energization to the motor when rotating the inner tank intermittently. 3...Outer tank, 4...Inner tank (washing and spin-drying tank), 2
7... Microcomputer (control device), 32
...Temperature detection device.

Claims (1)

[Claims] 1 In a dehydrator that centrifugally dehydrates the dehydrated material in the tank by rotating the dehydration tank at high speed, the dehydration process is controlled based on a temperature detection device that detects the air temperature and a detection signal from the temperature detection device. A dehydrator characterized by being equipped with a control device that performs the following steps.