JPS61168394A - Washing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention provides a method for storing liquid detergent and cleaning it! Detergent LTF that matches the amount of items: Related to automatic loading washing machines,
In particular, it relates to means by which the input amount can be approximately quantified even with respect to the ambient temperature.

[Background of the invention]

Automatic dispensing of this detergent is also described in JP-A-53-35272. However, even in mainstream washing machines in the current market, automatic injection of the amount of detergent that matches the amount of laundry is divided into four stages (generally divided by water level) and further divided into categories such as heavily soiled and light. If it is not developed, it will be of little practical use.

Furthermore, the viscosity of detergents is highly temperature-dependent, and no consideration has been given to the fact that the viscosity of detergents can vary widely even within the context of everyday life. This is a serious drawback in the four washing machines that perform precise automatic loading.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a washing machine having a device for automatically dispensing a fixed amount of detergent, which performs detailed automatic dispensing and eliminates the temperature dependence of detergent waiting.

[Low essentials of the invention]

Is this the temperature dependence of detergent? Thoroughly investigate these data, and as countermeasures, take countermeasures that will not waste energy, such as increasing or decreasing the driving time of the dosing device, increasing or decreasing the driving power, or increasing or decreasing the number of detergent passages, etc. This is what I was trying to do to measure the temperature.

[Embodiments of the invention]

An embodiment of the present invention will be explained below with reference to the drawings. Reference numeral 1 is an outer frame, 2 is an outer tank for storing water for washing, and has a support part 2a projecting outward, and a spring 9 is connected to the support part 2a. The push rod 7 is engaged. The comb rod holder 7 has a lower comb rod holder 7a and an upper 8 at both ends. The tank 2 is elastically supported.

Reference numeral 11 denotes a washing tub, which also serves as a dehydration tub and has small holes around its outer periphery.

12 is a stirring wing that stirs the laundry for washing;
Reference numeral 16 is a shaft connected to the g-moving section 15. The drive unit 15 has a speed reduction mechanism and a clutch unit, and separates the rotation of the stirrer 412 and the rotation of the washing tub 11. 15a, 1
Reference numeral 4a denotes a gooley, which transmits the rotational force from the motor 14 as a driving source through a belt 17. A center base 13 supports a motor 14 and drive parts 15, and is supported at the lower part of the outer tank 2. 2b is a guide part that protrudes from the lower part of the outer tank and leads to a water level sensor 6ftiii which connects the tube 5 and checks the supplied water by replacing t with water level; is the outer frame l
extends outside. 1a is a leg provided at the bottom of the outer frame 1, and lO is a cloth amount sensor that detects the rotation t of the motor 14.

The water supply pipe 18 extended from the water outlet is the water supply pulp 1
Water is supplied into the washing tub 11 through the water pipe 9 .

23 is a liquid detergent storage tank having a lid 23a;
5 is a motor pump that forcibly transfers liquid detergent to tank 2.
3 is connected to the suction tube 26 and the discharge tube 22, and the tip of the discharge tube 22 waits for a check valve 32 and is connected to a water supply hose that supplies water to the washing tub at a connection part 24.

The electrical control circuit in these configurations has a processing circuit consisting of a microcomputer in the center, a driving power supply circuit between the power supplies, a cloth amount sensor, a water level sensor, and a comparison circuit, a detection circuit, and a water level sensor. Has a temperature sensor. The selection circuit is used to select a washing process, and the display circuit displays these as well as temperature, amount of detergent, and various abnormal conditions. The motor, water supply valve, drain valve, and detergent dispenser are arbitrarily driven via a drive circuit that processes signals from the above-mentioned sensors using a processing circuit made up of a microcomputer.

As shown in FIGS. 3 and 4, a temperature sensor Fi is installed and located within the top cover 27 in order to control the amount of detergent added. 29 and 30 are a display section and an operation section, respectively, and 28 is a lid.

The details of the detergent dispenser will be explained with reference to Figs. 5 to 8.
The relative positions of the detergent liquid 31 contained in the tank 23 and the check valve 32 serving as the discharge port have a head difference of H. (This) (is a negative value, so-called detergent liquid can be used in the four tanks that are lower than the discharge port.7 This means that when the tank 23 is on the top surface of the top cover 27, the H dimension is positive, but outside (For example, when the liquid is placed in the blank space in frame 1.) Therefore, in the case of a drop glass, if there is no check valve 32, the liquid will flow out naturally, and if it is negative, the liquid will return between the tubes 22 and 26. The amount of detergent dispensed is determined by the drive time of the motor pump, but this results in variations. Therefore, check valve 3
2 is formed by a discharge port 32a and a push-in side 32b,
A rubber plate 33, a spacer 34, and a spring 35 with a weak spring force are used in the center to make it stand out. The motor pump 25 is a small motor, and has a vane 37 engaged with a motor shaft 36 and a seal 38 inside the casing 25a.
Forcibly transfers detergent liquid.

These basic operations can be explained using the simple flowchart shown in Figure 9. After loading the laundry, turn on the start switch.
, supply the specified amount of water, and then stir. During this stirring, the cloth amount sensor 1 is used to determine the amount of laundry.
0, and this data is processed to supply water necessary for washing again.

At the same time, determine the amount of detergent that matches the amount of laundry, and just before the end of water supply, drive the detergent dispenser and add the detergent while mixing it with the water being supplied.When the water supply is complete, the detergent will be stirred for washing. be.

However, liquid detergents have a
As shown in the figure, the viscosity changes greatly, and the amount transferred with respect to the dA driving time of the motor pump 25 differs. −
For example, even if the driving time of the motor pump 25 is set so that 40 ml of laundry is inputted against the rated washing capacity at 20 C, the output is 13 ml at OC and 55 ml at 40 C, resulting in a large difference.

Therefore, the ambient temperature is detected by the i degree sensor 31, and! JX
The first method is to subdivide the ambient temperature and set the driving time of the motor pump 25 within this subdivided range to a time during which a predetermined agitation can be applied. As shown in FIG. 11, the duration is 8 hours in the temperature range of TI, 5 hours in the temperature range of T2, etc. The second method is to print ambient temperature data from a temperature sensor on the motor pump 25 using a microcomputer.
The idea is to replace it with energy and make a profit on this amount of electricity. This is done by creating an electric quantity curve (Fig. 12) that has a force -b opposite to the curve shown in Fig. 10.

This can be done easily with a small DC motor and there are no problems. The third method is to use a heat-responsive element such as a bimetal as shown in Fig. 5113 to mechanically change the path through which the detergent liquid passes to adjust the flow rate. In this system, a bimetal plate bent into a circular shape is installed in the middle of the passage, and when the temperature is low, it deforms outward to enlarge the passage, and when the temperature is high, it deforms inward, narrowing the passage. It is.

A fourth method is to install a heater 40 at the bottom of the tank 23, and control the amount of electricity supplied to the heater according to a signal from a temperature sensor to suppress changes in viscosity. However, with this method, the amount of detergent liquid in the tank 23 (approximately 1 month's worth, 2
000 mt), the amount used at one time is only 40 mt, which is not a preferable method because there is a lot of waste.

In addition to the motor pump 25 of the embodiment, the present invention can also be applied to traps such as an electromagnetic pump or a simple electromagnetic valve to determine the amount of natural fall.

〔Effect of the invention〕

As mentioned above, by keeping the amount of detergent dispensed constant relative to the ambient temperature, it is possible to dispense appropriate detergent, and by making improvements to the liquid detergent itself, it is possible to improve the cleaning efficiency, which is the main issue. Therefore, there is no need to generate detergent that does not change in viscosity.Since the temperature sensor is located inside the top cover, there are many advantages in that it does not cause problems even when exposed to a stove or sunlight near the washing machine.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram of the washing machine, Figure 2 is an electric circuit diagram, Figure 3 is an electric circuit diagram of the detergent dispenser, Figure 4 is a top perspective view of the washing machine, and Figure 5 is the detergent dispenser. A schematic diagram of the parts, Figure 6 is a cross-sectional view of the check valve, Figure 7 is a diagram of the motor pump blade shape, Figure 8 is a cross-sectional view of the casing, Figure 9 is a simplified flowchart, and Figure 10 is a specification diagram. Figure 11 is a diagram showing the temperature dependence of detergent input amount over time. Figure 11 is a diagram showing the relationship between drive time and temperature to improve this temperature dependency. Figure 12 is a diagram showing the amount of electricity to the motor pump as a function of temperature. The changed diagram, FIG. 13, is a diagram of a bimetal whose path is to be changed mechanically. 23...Tank, 25...Motor pump, 31.
··Temperature sensor.

Claims (1)

[Scope of Claims] 1. In a washing machine having a storage tank for liquid detergent and an automatic droplet dispensing device, the temperature is measured in order to eliminate the fact that changes in the viscosity of the liquid detergent at ambient temperature disturb the dispensed amount;
This washing machine is characterized by correcting changes in the amount of input at that temperature to always maintain a constant amount of input. 2. The washing machine according to item 1, wherein the driving time of the loading device is controlled according to temperature measurement. 3. The washing machine according to item 1, wherein the driving power of the loading device is controlled according to temperature measurement. 4. The washing machine according to item 1, in which temperature measurement is electronic. 5. The washing machine according to item 1, wherein temperature measurement is performed mechanically and the number of detergent input passages is increased or decreased. 6. The washing machine according to item 1, wherein the temperature sensor is located within the top cover.