KR0141547B1 - Drying apparatus and method thereof in a drum type washing machine - Google Patents

Abstract

The present invention relates to a drying apparatus and a drying method of a drum washing machine, and more particularly, to a drying apparatus and method of a drum washing machine that separates the cooling water in the condensation duct from the circulating hot air in the washing tank and improves the drying efficiency.

At the start of the drying process, only the heater is operated and the cooling water is blocked until the temperature difference between the temperature T2 in the washing tank and the temperature T1 of the cooling water reaches the set temperature, and the temperature difference between the heater and the cooling water is set in the heater / cooling control process. When the temperature is reached, the cooling water is supplied and the temperature rise rate is stored from a predetermined range before reaching the normal temperature of the washing tank, the process of controlling the heater power according to the temperature rise rate of the temperature rise process, and the result of the heater control process When the temperature is approached from the normal temperature to the minute temperature difference, it is achieved as a process of controlling the heater voltage drop / rising accordingly.

Another means for achieving the present invention is to prevent the re-evaporation of the cooling water by preventing the direct contact of the cooling water and the water containing air discharged to the condensation duct during drying, and the water is removed from the re-evaporation prevention means It is achieved by including a heater control means for controlling the heated air in accordance with the drying temperature.

Description

Drying device and method of drum washing machine

1 is a block diagram of a drying apparatus of a conventional drum washing machine.

2 is a block diagram of a drying apparatus for a drum washing machine of the present invention.

3 is a more detailed cross-sectional view of the condensation duct of FIG.

4 is a cross-sectional view of FIG.

5 is a heater driving circuit diagram of FIG.

6 is a flowchart of the operation of the drying process of FIG.

7 is a temperature control change diagram according to the drying algorithm.

8 is a heater input voltage signal and a microcomputer control signal diagram.

* Explanation of symbols for main parts of the drawings

1: case 5: washing tank

6: Drum 7: Washing heater

8: Blower fan 9: Dry heater

10: drying duct 11: condensation

20: condensate hose 21: condensate drain hose

22: motor 23: water supply valve

24: Condensation Bellows

The present invention relates to a drying apparatus and method for a drum washing machine, and in particular, to separate the cooling water in the condensation duct from the circulating hot air from the washing tank to improve the condensation efficiency and to control the heater according to the drying temperature to improve the drying efficiency. It relates to a drying apparatus and method of.

As shown in FIG. 1, a dry device configuration of a conventional drum washing machine includes a drum 105 mounted in a washing tub 102 to rotate a laundry, and a plurality of drums passing water and air through the drum 105. A through hole and a lift 120 attached to the drum 105 to lift the laundry.

In addition, the condensation duct 112 for passing the hot air during drying in the lower right end of the washing tank 102 and the cooling water 113 for condensing the hot air in the upper right, water is supplied to the condensation duct is sprayed condensed as a result The drainage bellows with the condensate is configured to be discharged to the outside by the drain pump 111.

The washing tub 102 is supported by two dampers 103 and three springs 104 for preventing mechanical shocks caused by the motor 116 generating rotational power.

In the prior art configured as described above, the washing water is introduced into the washing tank 102 together with the detergent from the detergent container 118 containing the detergent, and the drum 105 is rotated left and right by the motor 116.

At this time, the lift 120 in the drum 105 lifts and drops the laundry, mixes the detergent and the laundry, and simultaneously performs the washing.

When the washing is completed, the drum 105 is rotated at high speed to dehydrate the laundry, and the dewatered water is drained to the outside by the drain pump 111 through the drain bellows 119.

After the draining process, the air introduced by the blowing fan 108 is introduced into the heater 109 by heating the drying duct 110, and the hot air generated at this time is supplied to the drum 105 through the front part of the drum 105. Dry the laundry inside).

The humid air generated during the drying process rises through the condensation duct 112, and the cooling water 113 for condensation is injected into the condensation duct 112 to condense the moisture discharged from the drum 105 and flow out into the water. At this time, the drain pump 111 discharges the condensed water to the outside.

On the other hand, the air from which moisture is removed is introduced into the drying duct again by the blowing fan 108 and heated by the heater again and circulated to the washing tank.

When the drying temperature in the washing tank 102 reaches a certain temperature, the power of the heater 109 is turned off, but when the temperature falls below a predetermined temperature, the power is turned on to maintain the temperature of the washing tank 102.

However, such a conventional technique is that the hot air air in the condensation duct is in direct contact with the cooling water, causing heat loss, and also because the temperature control is only turned on and off by the heater, it is not possible to heat the air circulated at the time of drying, and thus the moisture condensation efficiency. There was a problem dropping.

Therefore, the present invention separates the humid air generated by the hot air air supplied from the heater during drying with the cooling water in the condensation duct to improve the condensation efficiency and to control the heater according to the drying temperature to improve the drying efficiency of the drum washing machine An apparatus and method are provided.

Such a method for achieving the object of the present invention is the process of operating only the heater until the temperature difference between the temperature T2 in the washing tank and the temperature T1 of the cooling water at the start of drying reaches a set temperature and the cooling water is cut off, the heater / When the temperature difference between the heater and the cooling water reaches a predetermined temperature in the cooling control process, the cooling water is supplied and the temperature rising rate is memorized from a certain range before reaching the normal temperature of the washing tank, and the heater power is controlled according to the temperature rising rate of the temperature rising process. And close to a minute temperature difference from a normal temperature according to a result of the heater power control process, thereby finely controlling the heater voltage drop / rising.

In addition, the means for achieving the object of the present invention is to prevent the re-evaporation of the cooling water by avoiding the direct contact of the cooling water and the water containing air discharged to the condensation duct during drying, and the water is removed from the re-evaporation preventing means It is achieved by providing a heater control means for controlling and heating the air in accordance with the drying temperature, when the present invention will be described in detail with reference to the accompanying drawings.

2 is a configuration diagram of the drying apparatus of the drum washing machine of the present invention, wherein the cooling pipe 11d, the condensation duct 11c, and the like to prevent re-evaporation of the cooling water by avoiding direct contact between the moisture-containing air and the cooling water discharged to the condensation duct during drying. A re-evaporation preventing means configured of a condensate drain hose 21 to prevent water vapor in the tube condensed by the cooling pipe from becoming water and entering the tube, and controlling the air from which water is removed from the re-evaporation preventing means according to a drying temperature. It is composed of a heater control means composed of a triac 31 for controlling the power input to the heater 32 in accordance with the signal of the microcomputer 30 to heat the same.

A washing tank 5 which is buffered by two dampers 2 and 3 attached to the case 1 of the drum washing machine and fixed by three springs 4 to fill the washing water, and washing filled in the washing tank 5; A drum (6) with a plurality of openings for filling and rotating the laundry with water and allowing the washing water to pass through during the dehydration, a washing heater (7) for heating the washing water and the laundry during washing, and circulating air for drying Blowing fan (8), drying heater (9) for heating the drying air circulated from the blowing fan (8), and drying duct (10) for introducing the drying air heated in the drying heater (9) to the drum And, the condensation unit 11 for condensing the steam generated by drying the laundry by the heated dry air circulated in the drying duct 10, and the condensed water condensed in the condensation unit 11 drain bellows (12) The drain pump 13 and the drain hose 14 to discharge to the outside through the, and the temperature in the drum Underground temperature sensor (15), detergent container (16) and water supply valve (17) for supplying detergent and wash water, door bellows (18) for loading laundry into a drum and collecting it after washing, and the drum (6). And a lift 19 for mixing laundry with detergent, a condensate hose 20 and a condensate drain hose 21 for supplying and discharging condensate cooling water.

3 is a more detailed cross-sectional view of the condenser, wherein the condenser 11 includes a condensate hose 11a for supplying cooling water for condensation to the condensation duct, a process clamp 11b for connecting the fryer condensate hose and the cooling pipe; And a condensation duct 11c for guiding the water discharged from the drum 6, a cooling pipe 11d for condensing the discharged water, and fixing the condensation duct 11c and the cooling pipe and shielding it from the outside. It consists of a set screw 11e and the packing 11f, and a temperature sensor 11g for sensing the temperature of the cooling water.

4 is a more detailed cross-sectional view of the cooling pipe, in which the cooling pipe 11d is formed of a cooling fin 11d2 attached to the outside of the cooling pipe 11d1 to absorb heat.

FIG. 5 is a more detailed circuit diagram of the drying heater control unit, and a more detailed circuit diagram of the drying temperature and the drying heater control unit. The microcomputer unit 30 controls the peripheral part according to the drying temperature and the cooling water temperature, and The triac 31 turns on / off the power in accordance with the control signal, and the heater 32 generates heat by the power output from the triac 31.

When described in detail with reference to the accompanying drawings, the operation, effects of the present invention configured as described above are as follows.

First, in the washing process, the wash water supplied through the water supply valve 23 flows into the washing tank 5 through the water supply valve 17 together with the detergent of the detergent container 16, and the washing heater 7 heats the washing water. Meanwhile, the rotary motor 22 rotates the drum 6.

Accordingly, the lift 19 attached to the drum performs the washing while lifting and dropping the laundry.

When the washing is completed, the dehydration process is performed, while the motor 22 rotates at high speed, the drum 6 is rotated at high speed, thereby dehydrating the laundry out of the drum by centrifugal force.

The dewatered water is discharged to the outside by the drain pump 13 through the drain bellows (12).

After dehydration is finished, the drying process is performed. The motor rotates at a low speed, thereby rotating the drum at a low speed, and mixes the laundry evenly as in washing.

At this time, the blowing fan 8 operates to circulate the air, and the circulated air is heated by the drying heater 9 and flows into the drum through the drying duct.

The heated air deodorizes the moisture remaining in the laundry, is converted into wet air, and discharged to the condensation unit 11 through the opening in the drum.

The humid air flows into the condensation duct 11c and the temperature drops by the cooling fins of the cooling pipe 11d. As a result, the condensate drops and the air thus removed is recycled by the blower fan 8 again.

At this time, there is a temperature sensor on the top of the cooling pipe to measure the temperature of the cooling water.

5 is a heater driving circuit diagram. The microcomputer of the microcomputer unit 30 controls the drying heater and the cooling water.

The control signal for controlling the power of the heater is output from the microcomputer and the triac turns on / off the power of the heater according to the control signal.

6 is a flowchart of a drying operation, in which only a heater is operated and a cooling water is prevented until the temperature difference between the temperature T2 in the washing tank and the temperature T1 of the cooling water reaches a predetermined temperature α at the start of drying, and the heater / cooling control process When the water temperature reaches a constant temperature α, the process of storing the temperature rise rate for supplying the cooling water and increasing the temperature 10 ° C from 20 ° C before reaching the normal temperature β, and controlling the heater power according to the temperature rise rate of the temperature rise process and If the temperature is within the range of 2 ° C from the normal temperature β according to the result of the heater control process, the heater power is lowered / raised.

In more detail, at the start of drying, the heater is first turned on (S1) and the temperature difference between the washing tank and the cooling water is determined to be a constant temperature (S2), or the cooling water is shut off (S3) and returned to the step (S1).

If it is a certain temperature, supply the coolant (S4) and check if the temperature of the washing tank is within the range of 20 ℃ of normal temperature (S5) or if it is turned back for the first time and if it is within the range of 20 ℃, remember the time taken to rise to 10 ℃ (S6). Check whether the temperature is higher than the normal temperature (S7) or turn to the cooling water supply step (S4) and if it is higher than the normal temperature, control the heater voltage according to the rate of temperature rise (S8), and elapse the predetermined time (S9) Check whether the proximity to the normal temperature (S10).

When the temperature is in the range of 20 ° C., the heater voltage is decreased (S11). If the temperature of the washing tank is low while being outside the range of 2 ° C. (S12), the heater voltage is increased (S13) or (S14) is skipped.

When the heater voltage is lower than the predetermined set voltage (S14), the drying process is terminated or the heater control process (S9) is again performed.

FIG. 7 is a temperature change diagram according to the drying operation flow chart of FIG. 6, and shows a heater and cooling water control process according to the temperature change.

FIG. 8 is a control waveform applied to the triac by the microcom and voltage waveform applied to the heater, and detects an AC voltage input to detect a point A at which the voltage becomes +, and then A 'point from the point A according to the temperature increase rate. If the rise time of 10 ℃ is long, the distance between A and A 'is close, and the microcomputer control signal is blocked at point B.

Therefore, when the temperature rise rate is high, the length of the microcomputer control signal is shortened.

In this way, when A and A 'continue to be long, i.e., a predetermined time or more, drying is considered to be complete and drying is terminated.

As described in detail above, the present invention has the effect of preventing heat loss by blocking direct contact between hot air and cooling water in hot air drying and increasing the drying efficiency by controlling the heater voltage when reaching a normal temperature.

Claims (2)

A drum washing machine comprising a drum, a drying heater, a washing heater, a blower, a cooling water temperature sensor, a washing tank temperature sensing device, and a control unit for controlling the operation of each unit, wherein the drying heater is turned on and the temperature difference between the washing tank and the cooling water is controlled. If the temperature of the washing tank is blocked, check whether the temperature of the washing tank is within the normal temperature range. Remember the time, check whether the temperature of the washing tank is higher than the normal temperature, or turn to the cooling water supply process and if the temperature is higher than the normal temperature, the process of controlling the heater voltage according to the rate of temperature rise, and in the control section, the temperature change is normal temperature Check if it is close to the temperature range If the heater voltage is lowered and the temperature of the washing tank is low and the temperature of the washing tank is low, the heater voltage is increased. Otherwise, the heater voltage is detected. If the heater voltage is lower than the predetermined setting voltage, the drying process is terminated. Drying method of the drum washing machine performing the re-processing. Condensation by the cooling pipe, consisting of a cooling pipe 11d, a condensation duct 11c, and a condensate drain hose 21 to avoid direct evaporation of the cooling water by avoiding direct contact between the moisture-containing air discharged from the condensation duct and the cooling water during drying. Re-evaporation prevention means for preventing water vapor in the used tube from entering the tube and water, and the heater 32 in accordance with the signal of the microcomputer 30 to control and heat the air from which the moisture is removed from the re-evaporation prevention means according to a drying temperature. Drying apparatus of a drum washing machine, characterized in that consisting of a heater control means consisting of a triac (31) for controlling the power input to.