JPH0435690A - Hot water mixing control device for washing machine - Google Patents

Abstract

PURPOSE:To make the temperature of water in a washing tank suitable for washing by determining energizing time for a water side supply value and a hot water side supply valve based on the detected temperature and the detected flow rate of water supplied, so that the quantity of water supplied to the washing tank can be provided with heating value obtained by the set values for both of the temperature and the quantity of water. CONSTITUTION:A water temperature detecting means 1 detects the temperature of warm water where hot water is mixed with water, a water temperature setting means 2 sets up the target value for the temperature of water in a washing tank, and the aforesaid respective values are then inputted into an operating means 3. The operating means 3 then operates energizing time required by both a water side supply valve 4 and a hot water side supply valve 5 based on the data from the water temperature detecting means 1, the water temperature setting means 2, a flow rate detecting means 6 and a flow rate setting means 7. A water level detecting means 10 detects the water level of the washing tank, and it suspends water supply when the water level reaches the set one based on the result of the operations. By this constitution, the washing tank can thereby be provided with the temperature and the quantity of water suitable for washing, which are to be set up in advance.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a hot water mixing control device for a washing machine that mixes water and hot water to perform washing with hot water.

BACKGROUND OF THE INVENTION In recent years, the number of washing machines that can wash clothes using hot water has increased in order to improve the cleaning efficiency, and there is a demand for improved temperature accuracy of the hot water supplied to the washing tub.

Conventionally, a hot water mixing control device for this type of washing machine generally had a configuration as shown in FIG. The configuration will be explained below.

As shown in the figure, the water supply valve changeover switch 16 is used to switch the combination of energization of the water side water supply valve 17 and the hot water side water supply valve 18 during the water supply process of washing or rinsing, and only the water side water supply valve 17 is energized (C position χ The water side water supply valve 17 and hot water side water supply valve 18 are energized (W position), only the hot water side water supply valve 18 is energized (H position), etc., regardless of the water temperature that is actually being supplied. Water is supplied based on the above settings.The control means 19 controls opening and closing of the water side water supply valve 17 and the side water supply valve 18.

Problems to be Solved by the Invention In such a conventional hot water mixing control device for a washing machine, the user has to turn on and off the water tap during the water supply every time he or she does laundry in order to bring the water supply to a temperature suitable for washing. There was a problem of having to adjust the tap or hot water temperature.

The present invention solves the above problems, and eliminates the need for the user to adjust the water temperature, and automatically adjusts the water supply time to bring the water temperature in the washing tub to a temperature suitable for washing. The purpose is

Means for Solving the Problems In order to achieve the above object, the present invention has a calculation means for calculating the energization time of the water side water supply valve and the hot water side water supply valve. The problem is solved by determining the energization time of the water side water supply valve and the hot water side water supply valve based on the detected water supply water temperature and flow rate so that the amount of heat obtained from the water amount value is obtained.

Function The present invention uses the above-described means for solving the problem, and the water temperature in the washing tub is set by the water temperature setting means by energizing the water side water supply valve and the hot water side water supply valve for the time obtained by calculation. You can supply water to the water temperature.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIGS. 1 and 2.

As shown in the figure, a water temperature detection means 1 detects the temperature of hot water that is a mixture of hot water and cold water, and a water temperature setting means 2 sets a target value for the water temperature in the washing tub, and inputs each to a calculation means 3. .

The water side water supply valve 4 is for opening and closing the supply of water, and the hot water side water supply valve 5 is for opening and closing the supply of hot water. The flow rate detection means 6 is for detecting the flow rate of hot water that is a mixture of hot water and cold water, and the water amount setting means 7 is for setting a target value for the amount of water in the washing tub. The calculation means 3 calculates the energization time of the water side water supply valve 4 and the hot water side water supply valve 6 based on data from the water temperature detection means 1, the water temperature setting means 2, the flow rate detection means 6, and the water amount setting means 7. The water side water supply valve driving means 8 and the hot water side water supply valve driving means e drive the water side water supply valve 4 and the hot water side water supply valve 6, respectively. The water level detection means 1o is for inspecting the water level in the washing tub and stopping the water supply when the water level reaches a set level.

The water side water supply port 11 and the hot water side water supply port 12 respectively supply water and hot water, which are mixed before the water temperature inspection means 1 and the flow rate detection means 6 through the water side water supply valve 4 and the hot water side water supply valve 6, respectively. The water is stored in the outer tank 13 as washing water. In addition, the water level detection means 1
o detects the water level in the washing tub with a hose connected from the bottom of the outer tub 13. In addition, 14 is a drain valve, and 16 is a drain port.

The operation of the above configuration will be explained with reference to FIG. First, water supply is started in step 20, the water side water supply valve 4 is energized for t1 seconds in step 21, and the water temperature detection means 1 and flow rate detection means 6 detect the temperature and flow rate of the water in step 22. Let these be Tc and Qc. Next, in step 23, the hot water side water supply valve 6 is energized for t2 seconds, and in step 24
The water temperature and flow rate are detected by the water temperature detection means 1 and the flow rate detection means 6. Let these be Th and Qh.

In step 25, the set water temperature To set by the water temperature setting means 2, the set water amount WO set by the water amount setting means 7, and the data Tc, Qc obtained in steps 21 to 24 are determined.
, Th, and Qh to calculate the energization time of the water side water supply valve 4 and the hot water side water supply valve 5. That is, the energization time tc of the water side water supply valve 4 and the energization time th of the hot water side water supply valve 50 are given by the following equation.

,. = Wo (Th-To) t, ・・
(1) Qc (Th - Tc) When the result calculated by equation (1) or equation (2) is negative, the energization time is set to 0.

According to the energization time obtained in step 26,
Step 26 and subsequent steps are executed. In step 2e, the water side water supply valve 4 and the hot water side water supply valve 5 are energized, and in step 27.28
Secure the energization time tc of the water side water supply valve 4 with
．． 30, the energization time th of the hot water side water supply valve 6 is secured. Then, in step 31, if both the water side water supply valve 4 and the hot water side water supply valve 6 are energized for the calculated time and turned off,
In step 32, the water level is determined. If at least one of the water side water supply valve 4 to the hot water side water supply valve 5 is not energized for the calculated time, the remaining energization time is secured.

In step 32, the water level is determined when both the water side water supply valve 4 and the hot water side water supply valve 6 are energized for the calculated time. The set water level is obtained by dividing the set water volume set by the water volume setting means 7 and the cross-sectional area of the outer tank 13. Here, if the water level of the outer tank 13 has not reached the set water level, only the water side water supply valve 4 is turned ON in step 33 to supplement the water amount. Then, when the water level in the outer tank 13 reaches the set water level, the process moves to the next step.

Through the above operations, the water amount and water temperature in the outer tank 13 can be controlled to the set values.

Effects of the Invention As is clear from the above embodiments, according to the present invention, the calculation means determines the amount of water to be supplied into the washing tub based on the set water temperature value set by the water temperature setting means and the set water amount set by the water amount setting means. Since the energization time of the water side water supply valve and the hot water side water supply valve is determined so that the amount of heat obtained from can. Therefore, it is possible to save the user the trouble of setting the water temperature, and it is possible to prevent the user from accidentally setting a high water temperature value and damaging the clothes.

[Brief explanation of drawings]

Fig. 1 is a block diagram of a hot water mixing control device for a washing machine according to an embodiment of the present invention, Fig. 2 is a sectional view of a washing machine equipped with the same hot water mixing control device, and Fig. 3 is a hot water mixing control device of the washing machine. FIG. 4 is a block diagram of a conventional hot water mixing control device for a washing machine. 1...Water temperature inspection means, 2...Water temperature setting means, 3...Calculation means, 4...Water side water supply valve, 6......・Hot water side water supply valve, 6...Flow rate inspection means, 7...Water amount setting means. Name of agent: Patent attorney Shigetaka Awano and 1 other person!
i] Figure 2 f /Z Figure 2

Claims (1)

[Claims] A water side water supply valve that opens and closes the water supply, a hot water side water supply valve that opens and closes the hot water supply, a water temperature detection means that detects the temperature of the mixed water and hot water, and a target value for the water temperature in the washing tub. water temperature setting means, flow rate detection means for detecting the flow rate of water supplied, water amount setting means for setting the amount of water supplied to the washing tub, and calculation means for calculating the energization time of the water side water supply valve and the hot water side water supply valve. The calculating means calculates the amount of water so that the amount of water supplied into the washing tub becomes the amount of heat obtained from the set water temperature value set by the water temperature setting means and the set water amount value set by the water amount setting means. A hot water mixing control device for a washing machine, which determines the energization time of a side water supply valve and a hot water side water supply valve.