JPH04244194A - Washing machine - Google Patents

Abstract

PURPOSE:To use the title machine so as not to produce the state in which plastic parts, such as a receptacle, an agitator are deformed by hot water and collide with each other. CONSTITUTION:A temperature of water in a receptacle or a temperature of the receptacle is detected by a temperature-detecting means, and when it is decided that the detected temperature is at a specified value or higher, the operation of the title machine is controlled by a control means, so as to be stopped.

Description

[Detailed description of the invention]

[Object of the invention]

0002

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine which controls the operation of the washing machine by detecting the temperature of water in the tub or the temperature of the tub.

0003

BACKGROUND OF THE INVENTION Conventionally, major parts of washing machines, such as a tub and an agitator, have been made of plastic, primarily to reduce costs and weight. The plastic is polypropylene, etc., and when the load is low, 1
Although it has a high heat resistance of 00[°C] or higher, the heat resistance temperature drops to around 60[°C] during high loads such as during operation.

0004

[Problem to be solved by the invention] On the other hand, on the user side, due to the spread of hot water supply equipment as residential equipment becomes more sophisticated,
The number of cases in which hot water is used for laundry is increasing. In this case, since the temperature of the hot water can be arbitrarily selected, there are many cases where hot water as high as about 80[° C.] is used. On the other hand, parts made of plastic such as tanks and stirring bodies have no problem with heat resistance under low loads, as mentioned above.
There is a problem under high loads, which can lead to deformation due to softening and collisions. Particularly during spin-driving, the tub may be rotated at high speed with an uneven load due to the laundry being placed on one side, resulting in large deformation and damage to the tubs (inner/outer tubs) or the outer box. There was a risk of collision and major damage.

The present invention has been made in view of the above-mentioned circumstances, and its object is to provide a washing machine that can be used without causing deformation or collision of plastic parts with hot water.

[Configuration of the invention]

[0007]

[Means for Solving the Problems] In order to achieve the above object, the washing machine of the present invention is provided with a temperature detection means for detecting the water temperature in the tub or the tank temperature, and the results of the detection by the temperature detection means are provided. The present invention is characterized by comprising a control means for controlling execution of the operation to be stopped when it is determined that the water temperature in the tank or the tank temperature is equal to or higher than a predetermined value based on the above.

[0008]

[Operation] According to the above means, when the water temperature in the tank or the tank temperature is above a predetermined value, the control means makes a judgment based on the temperature detection result by the temperature detection means, and controls to stop the execution of the operation. do.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 8.

First, FIG. 4 shows an outer box 1 of the entire washing machine, in which an outer tub 2 made of plastic such as polypropylene is supported by an elastic suspension mechanism (not shown) and installed inside. Inside the outer tank 2, there is also a dehydration hole 3 on the peripheral wall, which is also made of plastic.
An inner tank 4 having a large number of . or,
A temperature sensor 6, which is a temperature detection means for detecting the water temperature in the outer tank 2 (inner tank 4) through the bottom wall of the outer tank 2, is attached to the outer lower part of the outer tank 2, and a motor 7 is connected to the outer tank 2. A main drive mechanism 8 is provided, and the agitator 5 is attached to a washing shaft 9 of the drive mechanism 8 that is rotated during washing, and the inner tank 4 is attached to a dewatering shaft 10 that is rotated during spin-drying. . In addition, a drain valve 11 and a drain hose 1 for discharging water in the outer tank 2 (inner tank 4) to the outside of the machine are provided at the outer lower part of the outer tank 2.
2 are also installed.

On the other hand, a top cover 1 is provided at the top of the outer box 1.
3 is attached, and the inside of the inner tank 4 (inside the outer tank 2) is attached to the rear of this.
A water supply valve 14 for supplying water to the tank and a water level sensor 15 for detecting the water level in the outer tank 2 (inner tank 4) are installed inside the tank, and a control device 16 as a control means is installed in the front part.

The control device 16 is constructed in detail by a microcomputer, and as shown in FIG. A detection signal is inputted, and a water level detection signal is further inputted from the water level sensor 15, and according to these inputs and a pre-stored control program, the water supply valve 14, motor 7, and the clutch (not shown) of the drive mechanism 6 are operated. Drive devices 20 and 21 that drive the electromagnet 18, which is also used for the drain valve 11, and the display unit 19, which includes various indicators, respectively.
, 22, 23 are provided with drive control signals. In this case, the drive device 21 that drives the motor 7 is an inverter device that can arbitrarily set the rotation speed of the motor 7.

Next, the operation of the above-mentioned structure will be described with reference to it.

When the control device 16 is turned on and starts operating, it first determines whether or not the start switch has been operated (step S1 in FIG. 1), and when it is determined that the start switch has been operated, the water supply valve is turned on. 14 to supply water to the inner tank 4 (outer tank 2) (step S2). After water is supplied, it is determined whether or not the water temperature in the outer tank 2 (inner tank 4) is 50 [°C] or higher in this case based on the input from the temperature sensor 6 (step S3). If it is not determined that the above is the case, washing is performed by starting the motor 7 and rotating the stirring body 5 (step S4), and then operating the electromagnet 18 to open the drain valve 11.
Drainage is performed (step S5).

On the other hand, in step S3, the outer tank 2
If it is determined that the water temperature inside (inner tank 4) is 50 [°C] or higher, a notification is given by activating a specific LED or buzzer in the display unit 19 for a certain period of time (step S
6) Then, based on the input from the temperature sensor 6 again, it is determined whether the water temperature in the outer tank 2 (inner tank 4) has fallen to less than 50 [°C] in this case (step S7), If it is determined that the value has decreased, immediately, or if it is not determined that the value has decreased, wait until the value has decreased and proceed to step S4.

Subsequently, after step S5, the water supply valve 14 is operated again to supply water into the inner tank 4 (outer tank 2) (step S8 in FIG. 2). After this water supply, it is further determined based on the input from the temperature sensor 6 whether or not the water temperature in the outer tank 2 (inner tank 4) is also 50[°C] or higher (step S9). ] If it is not determined that the above is the case, rinsing is performed by starting the motor 7 and rotating the agitator 5 (step S10), and then activating the electromagnet 18 to open the drain valve 11 to drain the water. (Step S11).

On the other hand, in step S9, the outer tank 2
If it is determined that the water temperature inside (inner tank 4) is 50 [℃] or higher, a notification is performed in the same manner as step S6 (step S12), and then in the same manner as step S7, the water temperature in outer tank 2 (inner tank 4) is notified. 4) has fallen below 50 [°C] (step S13), and if it is judged that it has fallen, immediately, or if it is not judged that it has fallen, wait for it to fall, and then step S10. Move to.

After step S11, it is determined whether or not the operation from step S8 has reached the third round (step S14), and the same operation as described above is repeated until it is determined that the third round has been reached. .

When it is determined in step S14 that the third cycle has been reached, the water temperature in the outer tank 2 (inner tank 4) is set to 30 in this case based on the input from the temperature sensor 6.
It is determined whether the temperature is less than [° C.] (step S15 in FIG. 3). Here, the water temperature in outer tank 2 (inner tank 4) is 30
If it is determined that the temperature is less than [° C.], dehydration is performed in the first mode (step S16). This first mode is as shown in FIG. 6, in which the electromagnet 18 is actuated to move the clutch of the drive mechanism, and the motor 7 is started to reach a high rotational speed of 850 [rpm] from the beginning in this case. This is for rotating the inner tank 4.

On the other hand, if it is determined in step S15 that the water temperature in the outer tank 2 (inner tank 4) is not less than 30 [°C], then the water temperature in the outer tank 2 (inner tank 4) is ) in this case is 30 to 40[° C.] (step S17). Here, if it is determined that the water temperature in the outer tank 2 (inner tank 4) is 30 to 40 [° C.], dehydration is performed in the second mode (step S18). This second mode is as shown in FIG. 7, in which the electromagnet 18 is actuated to move the clutch of the drive mechanism, and the motor 7 is initially started at a low rotational speed of 500 [rpm] in this case, and then The inner tank 4 is rotated by starting the engine to reach a high rotational speed of 850 [rpm]. Also, in this case, the time is longer than in the first mode by the amount of time required to start the motor 7 so that the rotational speed is initially kept at a low rotational speed of 500 [rpm].

[0021] Furthermore, in step S17, the outer tank 2
If it is determined that the water temperature inside (inner tank 4) is not 30 to 40 [℃], the water temperature in outer tank 2 (inner tank 4) is 40 [℃].
or more (but less than 50 [℃]), and the third
Dehydration is performed in the mode (step S19). This third
The mode is as shown in FIG. 8, in which the electromagnet 18 is actuated to move the clutch of the drive mechanism, and the motor 7 is started so that the rotation speed is kept at a low rotation speed of 500 [rpm] from beginning to end in this case. 4 is rotated. Also, in this case, the motor 7 is
The time is made longer than in the second mode by the amount of time required to start the engine so that the rotational speed is kept at a low rotational speed of 0.00 [rpm].

[0022] After the dehydration is completed, in any of the above cases, the process returns to step S1.

As described above, in this configuration, the inside of the outer tank 2 (
This is because when the water temperature in the inner tank 4) is 50 [°C] or higher, the control device 16 makes a judgment based on the temperature detection result by the temperature sensor 6 and performs control to stop the operation. It is possible to avoid rotation of heat-sensitive plastic parts such as the outer tank 2, the inner tank 4, and the stirring body 5 in a situation where their heat resistance is exceeded, and to prevent occurrence of situations such as deformation and collision. Can be done.

[0024] In addition to the above, especially in the above configuration, the dehydration operation mode is set and executed according to the water temperature even if it is below a predetermined value. The further effect that the outer tank 2 and inner tank 4 can be protected more reliably is obtained. However, this is not always necessary, and even if it is obtained, the operation mode may be set as shown in FIGS. 9 to 11. In this case, especially the second
For the mode (FIG. 10), motor 7 is initially
Regarding the third mode (Fig. 11), from beginning to end,
Each of them is rotated by being turned on and off so that the rotational speed is within the range of 600 to 400 [rpm].

[0025] Also, when the water temperature in the outer tank 2 (inner tank 4) is above a predetermined value, instead of looking at the water temperature and waiting for it to actually drop as described above, take action once the water temperature has dropped sufficiently. It is also possible to wait for a certain period of time during which you can view the image.

In addition, the temperature sensor 6 does not detect the water temperature in the outer tank 2 (inner tank 4) through the bottom wall of the outer tank 2, but in the outer tank 2 (inner tank 4). It may be possible to directly detect the water temperature, and the signal obtained by detecting the temperature of the outer tank 2 (inner tank 4) (tank temperature) instead of the water temperature can be directly used for control. It may be something.

Furthermore, the temperature sensor 6 may also serve as a device for setting the washing time, the rotational speed of the agitator, the dewatering time, etc. based on its output.

In addition, the present invention is not limited to the embodiments described above and shown in the drawings, but can be practiced with appropriate modifications within the scope of the gist.

[0029]

Effects of the Invention As is clear from the above description, the washing machine of the present invention is equipped with a temperature detection means for detecting the water temperature in the tub or the tank temperature, and based on the detection result by this temperature detection means, the washing machine according to the present invention It is characterized by comprising a control means that controls to stop the operation when the water temperature in the tank or the tank temperature is determined to be above a predetermined value, thereby preventing deformation of plastic parts due to hot water. It has the excellent effect of being able to be used without the possibility of a collision occurring.

[Brief explanation of the drawing]

[Fig. 1] Flowchart No. 1 showing one embodiment of the present invention

[Figure 2] Flow chart part 2

[Figure 3] Flow chart part 3

[Figure 4] Longitudinal side view of the overall configuration

[Figure 5] Schematic electrical configuration diagram

[Figure 6] First dehydration mode diagram

[Figure 7] Second dehydration mode diagram

[Figure 8] Third dehydration mode diagram

FIG. 9 is a diagram corresponding to FIG. 6 showing different embodiments of the present invention.

[Figure 1
0] Equivalent figure to Figure 7

[Figure 11] Diagram equivalent to Figure 8

[Explanation of symbols]

2 is an outer tank, 4 is an inner tank, and 6 is a temperature sensor (temperature detection means).
, 16 indicates a control device (control means).

Claims (1)

[Claims] Claim 1: A temperature detecting means for detecting a water temperature in a tank or a tank temperature, and the water temperature in the tank or a tank temperature is determined to be equal to or higher than a predetermined value based on a detection result by the temperature detecting means. 1. A washing machine characterized by comprising a control means for controlling the execution of operation to be stopped when the washing machine is operated.