KR0164948B1 - Apparatus and method for controlling water temperature of a washing machine - Google Patents

Abstract

The present invention relates to a water temperature control apparatus and a method for washing the laundry under the required water temperature by controlling the water supply operation of the cold and hot water of the washing machine by a predetermined unit level. Washing water temperature control apparatus of the present invention is a cold water valve 62 and hot water valve 72 connected to the cold water source and hot water source, the water level setting unit 100 for setting the desired washing water level and the water level for detecting the water level of the wash water In the washing machine provided with a sensing unit 50, the cold water or hot water can be supplied to the water level set through the water level setting unit 100, the water temperature setting unit 30, the water tank for setting the temperature of the desired wash water Installed in place of the water temperature sensing unit 40 and the water temperature setting unit 30, the water level setting unit 100, the water temperature detecting unit 40 and the water level detecting unit 50 for detecting the temperature of the current wash water By receiving a signal, the temperature of the current wash water is compared with the set wash water temperature, and according to the comparison result, the cold water valve 62 or the hot water valve for each predetermined water level until the wash water level reaches the set water level. The control unit 10 for controlling the opening and closing of the 72 Characterized in comparison.

Description

Water temperature control device and method of washing machine

1 is a block diagram of a water temperature control device of a washing machine of the present invention.

2 is a flowchart of the water temperature control method of the washing machine of the present invention.

* Explanation of symbols for main parts of the drawings

10: control unit 20: function selection unit

30: water temperature setting unit 40: water temperature detection unit

50: water level detection unit 60: cold water valve drive unit

62: cold water valve 70: hot water valve drive unit

72: hot water valve 80: washing motor drive unit

82: washing motor 90: display alarm unit

100: water level setting unit

The present invention relates to an apparatus and a method for controlling a water temperature of a washing machine, and more particularly, to an apparatus and method for controlling a water temperature of a washing machine to perform washing under a required water temperature by controlling a water supply operation of cold and hot water of a washing machine for a predetermined unit level. .

In washing clothes, it is necessary to perform the clothes under a temperature and a detergent suitable for the material of the fibers constituting the clothes, so that the life and the original shape of the clothes can be maintained for a long time. For example, clothing made of cotton or hemp made of natural cellulose fibers is not a problem when washed in water having a water temperature of 60 ° C. or lower, but clothing made of wool, which is an animal protein fiber, must be washed in water having a temperature of 40 ° C. or lower. Clothing made of silk, a vegetable protein fiber, should be washed in water having a water temperature in the range of 30 ° C-35 ° C. Clothing made of acetate-based fiber should be washed in water having a water temperature of 40 ° C or below. do. Furthermore, in the case of dark colored laundry, washing in water having a water temperature of 30 ° C. or less is preferable, and in the case of light colored laundry, washing in water having a water temperature of 40 ° C. or less is preferable.

However, in the washing machine proposed up to now, only one of the cold water, cold water, hot water and hot water can be selected through a water supply valve connected to an external cold water source and a hot water source, so that the water temperature suitable for the material of the laundry is accurately maintained. There was a difficult problem. In addition, when there is a problem in one of the cold or hot water source as a cause of inadmissibility, the washing water temperature is too high or too low to cause a fatal damage to the clothing. On the other hand, it is proposed that a so-called boiled washing machine having a washing water heating means in the tank to maintain the washing water at an appropriate temperature, but this is to boil a small amount of laundry having a specific material under hot water near the boiling point, heating means There is a problem that the price is expensive because it requires a washing tank and various safety devices made of heat-resistant materials. In view of such circumstances, it can be said that no washing machine capable of controlling the water temperature without providing a heating means therein has not been proposed until now.

The present invention has been made to solve the above-described problems, by maintaining the temperature of the wash water at a temperature suitable for the material of the laundry by controlling the water supply operation of the cold and hot water of the washing machine by a predetermined unit level to improve the life and the original shape of the laundry It is an object of the present invention to provide a water temperature control apparatus and method for a washing machine for long term storage.

Water temperature control device of the washing machine of the present invention for achieving the above object is a cold water valve and hot water valve connected to a cold water source and a hot water source, a water level setting unit for setting the desired washing water level and the water level detection for detecting the water level Claims [1] A washing machine having a portion to supply cold water or hot water up to a set water level through the water level setting unit, the washing machine comprising: a water temperature setting unit for setting a desired washing water temperature; Installed in place of the water tank to detect the current temperature of the wash water and the signal from the water level setting unit, the water level setting unit, the water temperature detection unit and the water level detection unit receives the current temperature of the wash water level of the set wash water Comparing with, characterized in that it comprises a control unit for controlling the opening and closing of the cold water valve and hot water valve for each predetermined unit until the water level of the wash water reaches the set water level.

On the other hand, the water temperature control method of the washing machine of the present invention is provided with a cold water valve and a hot water valve connected to a cold water source and a hot water source, so that the cold water or hot water can be supplied, the process of setting the desired washing water temperature, cold water Opening the valve and hot water valve at the same time to detect the current washing water level and the current washing water temperature, and if the current washing water level is below the set water level, set the current washing water temperature until the set water level is reached. Comparing with the water temperature, it is characterized in that it comprises a process for controlling the opening and closing of the cold water valve and hot water valve for each predetermined unit element according to the result.

In the above-described configuration, the unit element may be water level or time.

Hereinafter, the configuration according to a preferred embodiment of the present invention will be described in detail.

1 is a block diagram of the water temperature control device of the washing machine of the present invention. As shown in Figure 1, the water temperature control apparatus of the washing machine of the present invention, the control unit 10 for controlling the overall operation of the washing machine, washing stroke, rinsing stroke and dehydration stroke, the selection of the desired function and the execution time of the selected function Function selection unit 20 for setting the water, water temperature setting unit 30 for setting the temperature of the desired wash water, water temperature sensing unit 40 for detecting the temperature of the wash water is installed in the water tank of the washing machine And a cold water valve 62 connected to a cold water source to control the water level of the washing water being supplied to the cold water, a cold water valve 62 for supplying cold water into the washing machine, and a control unit 10. Cold water valve driver 60 for opening and closing, hot water valve driver for opening and closing the hot water valve 72 in accordance with the control of the control unit 10 and the hot water valve 72 for supplying hot water into the washing machine connected to the hot water source. ), At the time of washing administration The washing motor driving unit 80 which drives the washing motor 82 under the control of the washing motor 82 and the control unit 10 which rotates the pulsator (not shown) at a time period and rotates the washing tank at high speed when dewatering. ) And a display alarm unit 90 for displaying an operating state of the washing machine and warning of abnormality. In the drawing, reference numeral 100 denotes a water level setting unit for receiving a desired water supply amount from a user, and includes a weight sensing unit for detecting the weight of laundry instead of the water level setting unit or separately from the water level setting unit. After calculating the amount of water required for washing may be configured to automatically supply water.

Hereinafter, the operation of the water temperature control device of the washing machine of the present invention will be described in detail with the water temperature control method of the present invention. 2 is a flowchart showing the water temperature control method of the washing machine of the present invention. As shown in Figure 2, the water temperature control apparatus of the washing machine of the present invention can be applied to all the water supply process of the washing machine, for example, the water supply process in the washing administration and the rinsing stroke consisting of usually two to three times It can be applied well for each water supply process in.

First, in step (S10) receives the temperature of the desired wash water from the user through the water temperature setting unit 30. The user may set the desired temperature of the washing water in consideration of the material of the laundry to be washed. In step S20, the control signal is output to the cold water valve driving unit 60 and the hot water valve 70 to simultaneously open the cold water valve 62 and the hot water valve 72 to supply cold water and hot water to the water tank. In step S30, it is determined whether the water supply result has reached a predetermined unit element, preferably, a predetermined unit water level. If it is not reached, water supply is continued, and when it is reached, step S40 is performed. In step S40, the current water level is detected through the water level detecting unit 50. Although not described on the other hand, the setting of the washing water level may be set to one of the high, medium, low, small and the minimum water level according to the user's selection or the amount of the laundry before the step S10 shown in the flowchart. Furthermore, the unit level should be determined at least lower than the minimum level. In step S50, the pulsator is driven several times by operating the washing motor 72 to reduce the temperature deviation of the supplied wash water. Next, in step S60, after sensing the temperature of the current wash water through the water temperature sensing unit 40, the process proceeds to step S70, and the temperature of the wash water so far supplied is compared with the temperature set in step S10. do. If the temperature of the current wash water is greater than the set temperature in step S70, the flow proceeds to step S80 to block the cold water valve 62 and to keep the hot water valve 72 open, and then proceeds to step S120. . When the temperature of the current wash water is smaller than the set temperature in step S70, the process proceeds to step S80 to determine whether the temperature of the current wash water is the same as the set temperature. In this case, the determination of equality can be regarded as the same when the temperature difference value is within a predetermined range. If the current wash water temperature is the same as the set temperature in step S90, the water supply is continued by simultaneously opening the cold water valve 62 and the hot water valve 72, and then proceeding to step S100. If the temperature and the set temperature of the current wash water is not the same in step (S90), because it is larger than the temperature of the current wash water, the flow proceeds to step S110 and the cold water valve 62 is blocked and the hot water valve ( 72 continues to open, and then proceeds to step S120. In step S120, the water level of the wash water supplied to the present time is compared with the set water level, and when the water level of the wash water is lower than the set water level, the process is repeated again under step S30, and in the same case, the following process is performed. do. In the above-described configuration, the unit water supply time t may be used instead of the unit water level.

As described above, according to the water temperature control apparatus and method of the washing machine of the present invention, washing can be performed at a temperature suitable for the material of the laundry in a washing machine that does not have a separate heating means to preserve the life and the original shape of the laundry for a long time. It can work.

Claims (2)

Function selection unit 20 for setting a desired function, such as washing, rinsing and dehydration, and setting the execution time of the selected function, and a water temperature sensing unit 40 installed at a proper location in the water tank of the washing machine to sense the temperature of the washing water. And, the water level detection unit 50 for detecting the water level of the wash water being supplied, the cold water valve 62 is connected to the cold water source to supply cold water to the water tank of the washing machine, and the cold water valve driver for opening and closing the cold water valve 62 60, a hot water valve 72 connected to the hot water source to supply hot water to the water tank of the washing machine, a hot water valve driver 70 to open and close the hot water valve 72, and a pulsator at a predetermined time period during the washing stroke. Washing motor 82 and the washing motor driving unit 80 for driving the washing motor 82 and the washing motor rotates at high speed in the reverse rotation and dehydration administration, washing water detected through the water temperature sensing unit 40 The cold water valve 62 and the hot water valve according to the temperature of The cold water valve 62 and the hot water valve each time the washing water level detected by the water level detection unit 50 reaches a predetermined unit water level while opening 72 to supply the cold water and the hot water to the set water level. 72. A water temperature control apparatus for a washing machine for controlling an opening and closing operation of a washing machine, comprising: a water temperature setting unit 30 for setting a temperature of washing water according to a material and color of laundry; And when the washing water level detected by the water level detecting unit 50 reaches the unit water level, the pulsator may be rotated several times by the washing motor 82 to reduce the temperature deviation of the washing water supplied to the water tank of the washing machine. The washing motor driving unit 80 is controlled to be driven, and then, by comparing the current temperature of the washing water detected by the water temperature sensing unit 40 with the set temperature by the water temperature setting unit 30, the And a control unit (10) for controlling the opening and closing operation of the cold water valve (62) and the hot water valve (72) according to the comparison result. Function selection unit 20 for setting a desired function of washing, rinsing and dehydration, and setting the execution time of the selected function, and the water temperature setting unit 30 for setting the temperature of the washing water according to the material and color of the laundry. And, it is installed in the water tank of the washing machine is installed in the water temperature sensing unit 40 for sensing the temperature of the wash water, the water level sensing unit 50 for detecting the water level of the washing water being supplied, the cold water source is connected to the water tank of the washing machine A cold water valve 62 for supplying cold water to the cold water, a cold water valve driver 60 for opening and closing the cold water valve 62, a hot water valve 72 connected to a hot water source to supply hot water to a water tank of the washing machine, and the hot water The hot water valve driving unit 70 for opening and closing the valve 72, the washing motor 82 for rotating the pulsator forward and backward at a predetermined time period during the washing stroke and the washing tank at a high speed during the dehydrating stroke, and the washing motor 82 Drive washing motor driving unit 80 and the hot water detection The control unit 10 for controlling the opening and closing operation of the cold water valve 62 and the hot water valve 72 according to the temperature of the wash water detected through the (40), and during the supply of cold water and hot water up to the set water level Whenever the current wash water level reaches the preset unit level, if the wash water temperature is lower than the set temperature, only hot water is supplied until the next water level is reached.If the wash water temperature is higher than the set temperature, the next water level is reached. In the water temperature control method of the washing machine for supplying only the cold water until the time, and if the wash water temperature is the same as the set temperature, supplying the cold water and hot water at the same time until the next unit water level reaches the set water level, the water level detection unit Determining whether the washing water level sensed through the step 50 reaches the preset unit water level (S30); When the washing water level detected in the step S30 reaches the unit water level, the washing water detected by the water temperature sensing unit 40 immediately before sensing the temperature of the washing water through the water temperature sensing unit 40. Controlling the control unit 10 to reduce the temperature deviation of the pulsator several times to mix the washing water evenly (S50); And performing the step (S50) and then comparing the temperature of the current wash water detected by the water temperature sensing unit 40 with the set temperature set by the water temperature setting unit 30 until the set water level is reached. And a step of supplying hot water (S70-S120).