JPH02302295A - Washing machine - Google Patents

Abstract

PURPOSE:To surely wash dirt of clothing and to sterilize acurus by devising the control means such that the means controls a water temperature raising means at washing, washes cloth at a specific water temperature, raises the washing water temperature to the specific temperature after end of washing, leaves the cloth for a prescribed time and discharges the water. CONSTITUTION:The control means 21 controls water and hot water supply valves 18a, 18b to set the water to a proper temperature so that the water temperature in a water tank 2 is able to be set to water temperature 30 to 45 deg.C suitable for the washing and washing is applied while a pulsator 4 is driven forward and reverse. The temperature of water in the tank 2 after washing is finished is measured by a water sensing means 22 and the data is received by the control means 21 and the control means 21 calculates it to make the water temperature in the tank 2 to be 50 to 60 deg.C how many l of the water in the tank 2 are to be discharged and how many l of hot water are to be supplied. The control means 21 opens a drainage valve 14 to discharge the calculated quantity of discharge water and then closes the drainage valve 14. The control means 21 opens the hot water supply valve 18b to control the hot water supply valve 18b so as to obtain proper temperature of 50 to 60 deg.C. When the proper sterilizing temperature of 50 to 60 deg.C is reached, the cloth is left for a proper time at the temperature to sterilize the racus and germ and then the washing water is discharged.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a washing machine that performs washing by increasing the temperature of washing water in order to improve washing efficiency.

Conventional technology Traditionally, the washing water temperature has been set at 30°C to 45°C to improve the cleaning effect.
It is known to wash at ℃. Recently, there are fully automatic washing machines that have an electric heater installed at the bottom of the water tank to raise the water in the tank to the above-mentioned appropriate temperature for washing.

Problems to be Solved by the Invention However, in the conventional configuration, water at an appropriate temperature for cleaning (30°C to 45°C)
), it was not possible to kill the parasitic mites and wash the clothes hygienically. In addition, in order to kill the mites that are parasitic and attached to sheets and blankets, it is possible to set the water temperature at 50 to 60 degrees Celsius during washing, but washing at this water temperature may cause the types of stains on the clothes, such as protein-based stains (
Sweat, blood, etc.) coagulate, making it difficult to remove stains.

In view of the above problems, the present invention aims to reliably remove dirt from clothing and kill dust mites.

Means for Solving the Problems In order to achieve the above object, the present invention includes a water temperature detection means for detecting the water temperature in the tank and a water temperature raising means for raising the water temperature in the tank, and controls the water temperature raising means during the washing operation. and 30
Washing is carried out at a water temperature of .degree. C. to 45.degree. C., and after the washing operation is completed, the washing water temperature is raised to 50.degree. C. to 60.degree. C. and left for a certain period of time.

Effect With the above configuration, after washing at an appropriate temperature to ensure that protein-based stains are removed from clothing, the washing water temperature is raised to a high temperature, so protein-based stains do not coagulate and remain on clothing. It also kills mites.

Embodiment Hereinafter, one embodiment of the present invention will be described in detail based on the drawings. FIG. 1 shows the configuration of a fully automatic washing machine according to an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes an outer frame in which a water receiving tank 2 is suspended and supported by a suspension 9. Inside the water receiving tank 2, a washing tub/dehydrating tub 3 with a small hole is disposed, and furthermore, a rotary blade 4 for stirring clothes is disposed at the inner bottom of the washing/dehydrating tub 3. Also, the motor 5 attached to the bottom of the washing tub 3
The rotation is transmitted through the belt 6, pulley 7, and rotation mechanism section 8. 10 is a liquid balancer fixed to the upper part of the washing tub/dehydration tank 3; 11 is a cover attached to the upper opening of the water receiving tank 2; 12 is a top plate that covers the top of the outer box 1; 13 is a shaft attached to the top plate. It is a supported lid. A drain valve 14 drains the water in the water tank 2 to the outside of the machine via a drain hose 15.

Further, an air trap 2a having an opening is formed in the side wall of the water receiving tank 2, and a hose mouthpiece 2b is formed at the other end of the air trap 2a, and connected to the water level detection means 17 via an air hose 16. has been done. In addition, 1 shown in Figure 2
8a is the water supply valve, 18b is the Wenzhou water supply valve, 19a
, 19b are water supply hoses, which are independently communicated with the water injection mouthpieces 20a and 20b. 21 has a microcomputer and is used for washing,
This is a control means for carrying out the rinsing and dehydration steps. Reference numeral 22 denotes water temperature detection means disposed at the bottom of the water receiving tank 2.

FIG. 3 shows a water supply operation of a washing program showing a series of washing operations. First, water is supplied to a certain water level by the water supply valve 18a, and the control means 21 is controlled based on the information on the water level and the time until the certain water level from the water level detection means 17 and the temperature data in the water receiving tank 2 from the water temperature detection means 22. calculates and stores data on the temperature and flow rate of water flowing through the water supply valve 18a. Next, hot water is supplied to a certain water level from the Wenzhou water supply valve 18b, and the water temperature detection sensor 22 measures the hot water supply time and the water temperature in the water tank at that time, and the control means 21 controls the temperature and flow rate of the water flowing through the water supply valve 18b. Calculate and memorize 3.

In order to set the water temperature in the water receiving tank 2 at the optimal water temperature for washing, 30°C to 45°C, the control means 21 allows water to flow through the water supply valves 18a and 18b for water and wenzhou at the same time or alternately to reach the above-mentioned appropriate temperature. , and the rotary blade 4 is reversed in the normal direction to perform washing.

Then, dirt adhering to the clothes, especially protein-based dirt, is effectively removed and the washing operation is completed.

As a means to accurately detect the water temperature in the water receiving tank 2,
After water has been supplied to the water supply valve 18a and Wenzhou water supply valve 18b, the motor 5 is energized intermittently to reverse the rotor blade 4 in a short period of time (0.2 to 0.6 seconds). After the water in the water receiving tank 2 is stirred to make the water temperature uniform, the water temperature detection means 22 measures the accurate water temperature, and the control means 21 inputs the signal.

In addition, it is preferable that the water supply valve 18a for water and the Wenzhou water supply valve 18b be passed through the water supply valve 18b first.

This is because the temperature of the water heater to which Wenzhou's water supply valve 18b is connected may be as high as 80°C.
This is to prevent adverse effects on the heat resistance such as thermal deformation of the water receiving tank 2 and other resin parts.

Next, to explain the sterilization process, first, the temperature inside the water receiving tank 2 after washing is completed is measured by the water temperature detection means 22, and the data is inputted to the control means 21.
1 calculates how many e of water should be drained from the water receiving tank 2 and how many e of hot water should be supplied in order to bring the water temperature in the water receiving tank 2 to 50° C. to 60° C. First, the control means 21 opens the drain valve 14, continues draining operation for only a time corresponding to the calculated amount of drained water, and then closes the drain valve 14. Next, open the Wenzhou water supply valve 18b.5
The Wenzhou water supply valve 18b is controlled to maintain an appropriate temperature of 0°C to 60°C.

Once it reaches the appropriate temperature for sterilization of 50°C to 60'C, leave it for about 1 to 2 hours (or you can choose an appropriate time) at that temperature to kill bacteria and mites, and then carry out the normal course of drainage and dehydration (
repeat

According to Example 1 above, there is no heat generating device such as a heater attached to the bottom of the tank, so it is highly safe, and it is possible to use a household water heater with low energy costs such as a gas or kerosene boiler. As a result, operating costs are low, and it also eliminates the problems of washing machines with heaters, such as the time it takes to boil water.

In this embodiment, hot water from a boiler or the like is supplied into the tank from the Wenzhou water supply valve to constitute the water temperature raising means to achieve the above effect, but the above effect can also be achieved in a washing machine with a built-in heating means such as a heater. It goes without saying that the object of the present invention can be achieved by sterilizing bacteria and preventing protein-based stains from coagulating and adhering to clothes.

Effects of the Invention As described above, the present invention performs sanitary washing of clothes by washing at a washing water temperature that maximizes washing efficiency to remove dirt, and then raising the temperature in the tank to a water temperature that can kill dust mites and bacteria. Not only is it effective, it also prevents protein-based stains from coagulating on clothing and causing stains.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of a fully automatic washing machine showing an embodiment of the present invention, and FIG. 2 is a top view of essential parts of the fully automatic washing machine. FIG. 3 is an explanatory diagram showing the washing process and the operation of the electromagnetic water supply valve. 2...Water tank, 3...Washing and dehydration tank,
4...Rotary blade, 14...Drain valve, 18
a... Water supply valve for water, 18b... Wenzhou water supply valve, 21... Control means. Name of agent: Patent attorney Shigetaka Awano (1 person) Figure 2 Figure 3

Claims (1)

[Claims] A tank equipped with rotatable rotary blades for stirring clothes, a water supply device that supplies water to the tank, a drainage device that drains water from the tank, and a water temperature detection means that detects the water temperature in the tank; A water temperature raising means for raising the water temperature in the tank and a control means for controlling a washing operation, the control means controls the water temperature raising means during the washing operation to wash at a water temperature of 30° C. to 45° C. A washing machine that raises the temperature of the washing water to 50°C to 60°C after the end of operation, leaves it for a certain period of time, and then operates a drainage device.