KR20060114108A - Drum washing machine with a heater protecting apparatus - Google Patents

Abstract

A drum-type washing machine with a heater safety apparatus is provided to check whether or not the water is stored and preclude the motor from being burned by installing the temperature sensors at the upper and lower sides of the heater arranged in the heating box. A drum-type washing machine(100) with a heater safety apparatus is composed of a heater having a heating box(170) connected to a water supply path(181) for supplying the water and a circulation path(151) through which the water stored in a water storage tub(120) is circulated; an inlet pipe(191) bored and opened/closed by a synchronous motor(193); a first temperature mounted at the upper side of the heater to measure the temperature; a second temperature installed at the lower side of the heater to measure the temperature; and a control units(190) for transmitting an error signal to the outer displaying unit if the signal sensed at the first temperature sensor is greater than the signal sensed at the second temperature sensor over a predetermined value.

Description

Drum Washing Machine with Heater Safety Device {DRUM WASHING MACHINE WITH A HEATER PROTECTING APPARATUS}

1 is a perspective view of a drum washing machine according to the prior art,

2 is a schematic cross-sectional view of a drum washing machine according to an embodiment of the present invention, and

3 is an enlarged cross-sectional view of the heating box shown in FIG. 2.

<Description of Symbols for Main Parts of Drawings>

100: drum washing machine 110: door

111: door gasket 120: reservoir

121: injection fitting 123: third temperature sensor

130: damper 140: washing tank

150: circulation pump 151: circulation passage

160: drive motor 170: heating box

180: detergent container 181: water supply passage

190: control unit 191: inlet piping

193: Synchronous motor

The present invention relates to a drum washing machine, and more particularly, by installing a temperature sensor on the upper side and the lower side of a heater which protrudes inside a heating box for supplying high temperature washing water to a water tank, due to the temperature difference between the two sensors. The present invention relates to a drum washing machine having a heater safety device capable of checking whether or not washing water is stored in a storage space of a heating box.

In general, the drum washing machine rotates the cylindrical washing tank from the inside of the water tank, while washing is performed by dropping the laundry from the upper side to the lower side of the washing tank. Drum type washing machine has less damage by twisting laundry than pulsator type washing machine or edge data washing machine. It has a relatively small characteristic.

Such a conventional drum washing machine 10 is shown in FIG.

As shown in Figure 1, the washing tank (1) for providing a laundry space in the interior of the storage tank (2) horizontally installed is rotatably installed, the washing aid such as fabric softener on the upper portion of the reservoir (2) Including a detergent container (3) for supplying a laundry detergent, etc., the door (not shown) is provided on the front of the washing tank 1 so as to be openable and openable.

In addition, the tension coil spring (not shown) between the top of the cabinet (not shown) and the reservoir (2) to absorb the vibration and shock caused by the rotation and stop of the washing tank (1) or the fall of the laundry in the washing and dehydration process. ) Is coupled, the elastic damping of the tension coil spring (not shown) and the damping of the oil damper (not shown) by connecting an oil damper (not shown) between the bottom of the cabinet (not shown) and the bottom of the reservoir (2) Action to reduce vibration and shock.

In addition, in the past, a heater for heating the washing water is built between the washing tank and the water storage tank. In order to wash with high temperature washing water, the washing water supplied from the water supply pipe is supplied to the water storage tank. By installing the installed heater and heating the stored wash water to the set temperature, waste of energy is seriously related to heating all the stored wash water at a time, and after the wash water is stored in the water tank, the heater is started to wash the water. By heating, due to the problem that the waiting time is too long before entering into the washing operation, the water supply passage and the circulation passage are connected to a predetermined position of the heating box provided with a heater on the outside of the reservoir, so that the water tank 2 has a high temperature. Improved to supply wash water.

The drum washing machine 10 having the structure as described above typically has a drying function to allow the laundry to proceed after the end of the washing and dehydrating stroke, and thus the drum washing machine 10 is disposed between the upper side and the rear side of the drum washing machine 10. As the chamber equipped with an electric heater and a drying device (5) consisting of a blower fan and a condensation duct are combined, the air in the washing tank 1 is repeatedly circulated, while in this process, hot air is injected into the washing tank and Condens the moisture contained in it to allow the laundry to dry.

When power is applied to the drum washing machine 10 and the washing process proceeds, the washing water supplied from the upper water supply pipe 4 is introduced into the washing tank 1 while the detergent stored in the detergent container is properly dissolved.

However, a heater (not shown) built in a heating box (not shown) provided on the outside of the water storage tank 2 in order to execute the washing process with high temperature washing water is immersed in the washing water to heat the washing water. When a heater (not shown) is operated while the water is not stored in the storage space in the heating box, a heater (not shown) that is operated is exposed to the air, causing the heater (not shown) to burn out or malfunction.

Accordingly, the present invention has been made to solve the above problems, the object of the present invention is to project the inside of the heating box formed through the water supply passage and the circulation passage to the outside of the reservoir in order to supply the hot wash water to the reservoir. By installing a temperature sensor on the upper side and the lower side of the mounted heater, to provide a drum washing machine equipped with a heater safety device that can confirm the presence or absence of wash water in the storage space of the heating box due to the temperature difference between the two sensors.

In order to achieve the above object, the present invention, a drum washing machine is provided with a heater for heating the wash water flows into the heating box connected to the water supply passage for supplying the wash water from the outside and the washing water circulated in the reservoir tank circulation In the, the inlet pipe connected to the bottom of the heating box and the top of the reservoir tank through the opening and closing by the synchronous motor, the inlet pipe is in a closed state, the first temperature is installed on the upper side of the heater to measure the temperature A sensor, a second temperature sensor installed below the heater to measure the temperature of the heater, and washing water flows into the heating box, and the heater is operated for several seconds to detect a signal detected by the first temperature sensor. Control to transmit an error occurrence signal to the external display means when applied as a signal larger than the predetermined value than the signal detected by the temperature sensor In that it comprises the features.

Preferably, the second temperature sensor is installed on the upper side wall of the inlet pipe on the basis of the part opened and closed by the synchronous motor.

More preferably, it includes a backflow prevention film to prevent the washing water flowing from the circulation flow path back to the water supply flow path.

Hereinafter, a preferred embodiment of the drum washing machine 100 according to the present invention with reference to the accompanying drawings in more detail.

2 is a schematic cross-sectional view of the drum washing machine 100 according to an embodiment of the present invention.

As shown in FIG. 2, the drum washing machine 100 has a door 110, a door gasket, and a door 110 for inflowing laundry into the washing tank 140 and blocking leakage of the washing water, and the washing tank 140. Drive motor 160 for rotating the washing tank 140 in the washing stroke and dehydration stroke by combining with the drive shaft, the rotation of the washing tank 140 by the drive motor 160 in the process of washing and dehydration stroke or the fall of the laundry Damper 130 is connected between the lower part of the cabinet and the lower part of the reservoir 120 to absorb the vibrations and shocks generated, the water supply unit for supplying or circulating the wash water into the reservoir 120, washing stroke and dehydration stroke. It includes a control unit 190 for performing various modes such as.

When the water supply unit proceeds to the normal washing administration mode, the water supply valve of the washing machine is opened, the washing water is introduced from the external water supply pipe, and the washing water supplied through the water supply passage 181 installed on the upper side of the reservoir 120 is supplied via the detergent container 180. A proper amount of detergent is dissolved and flows into the heating box 170.

Washing water introduced into the storage space of the heating box is formed through the bottom of the heating box 170 is supplied to the interior of the reservoir 120 through the inlet pipe 191 connected to the reservoir 120.

The injection fitting 121 is fixed to the side wall of the reservoir 120 so that the injection fitting 121 is positioned under the hole formed by the inlet pipe 191 of the upper end of the reservoir 120 is formed, the inlet pipe 191 Washing water flowing into the reservoir 120 through the washing water is sprayed to the bottom of the reservoir 120 due to the spray mounting 121 is preferably stored.

Wash water is stored in the water tank 120 through the water supply path, and a suitable amount of water level is set according to the amount of the laundry, and the washing water is generally drained through the drain pipe after a predetermined washing process is performed.

In addition, the water supply unit for executing the laundry administration while washing or calling the laundry is installed on the water supply passage 181, which is a passage through which the wash water flows from the outside, and the appropriate amount of detergent melts as the wash water flows in. Detergent container 180, the heating box 170 for heating a certain amount of washing water to a high temperature washing water, washing water in the heating box 170 when the user reaches the temperature set by the external keypad to the reservoir 120 It may be provided as a synchronous motor 193 for supplying a high temperature wash water through the inlet pipe 191.

In addition, the synchronous motor is driven to open the inlet pipe, the high temperature wash water flowing into the reservoir is sprayed by the injection fitting 121 and the washing operation is supplied when the high temperature wash water is evenly supplied to the laundry and stored at a predetermined level While being executed, a circulation pump 150 is further included to maintain the temperature of the washing water in the reservoir 120 to circulate the washing water to the heating box 170.

In addition, the circulation flow path 151 which is a path through which the washing water stored in the storage tank 120 flows into the heating box 170 by driving the circulation pump 150 installed at the bottom of the storage tank 120 while the washing operation is executed. Included.

In addition, the washing process is carried out with a high temperature wash water and the circulation pump 150 is operated to wash the water in the water tank 120 is re-introduced into the heating box 170 while the washing water is reheated and supplied again to the water tank 120. Due to this, the washing cycle can be repeatedly executed with the washing water maintained at a high temperature.

Therefore, the third temperature sensor in the reservoir 120 to detect the appropriate temperature of the wash water in the reservoir 120 to operate the circulation pump 150 and to control the number and process of the wash water circulated through the heating box 170. It is preferable to provide 123.

3 is an enlarged cross-sectional view illustrating the heating box 170 illustrated in FIG. 2.

As shown in FIG. 3, the heating box 170 has a water supply passage 181 connected to an upper side thereof so that the washing water is supplied from an external water supply pipe in an initial process of the washing operation, the bottom of the heating box 170 and the reservoir 120. Connecting to the top of the synchronous motor (193) through the wash water is introduced into the reservoir 120 is connected to the outside to the inlet pipe 191 is controlled.

In addition, in the heating box, the synchronous motor 193 seals the inlet pipe 191 and the washing water supplied to the water supply passage 181 stores a predetermined amount in the storage space in the heating box 170, and stores a predetermined amount of the washing water stored therein. A heater for heating to a temperature set by a user, a first temperature sensor installed at an upper side of a heater that emits heat to detect heat, and an inflow pipe capable of detecting a temperature of washing water being heated below or under the heater ( It is installed on the side wall of 191 may be provided as a second temperature sensor for sensing the temperature of the heating box 170 due to the heater.

In addition, one side of the heating box 170, the washing water of the water reservoir 120 is re-introduced into the circulation flow path 151 flows back to the water supply flow path 181 to prevent the detergent contained in the detergent container 180 is dissolved It is preferable that a prevention film is further provided.

Here, the heater is locked due to the wash water stored in the heating box 170, the washing water is directly in contact with the outside of the heater to operate as a heating source, thereby heating the wash water stored in the heating box 170. .

In addition, when an error occurs in the process of washing the washing water into the heating box 170 and the heater is operated in a state in which the washing water is not stored in the storage space in the heating box 170 properly, the outer surface of the heater is the heating box 170. Direct exposure to the air inside the lamp will cause the heater to burn out or cause malfunction.

For this reason, the first temperature sensor and the second temperature sensor are respectively mounted on the upper side and the lower side of the heater to protect the heater operating in a state in which the constant washing water is not stored in the heating box 170.

The controller 190 receives the signals detected from the first temperature sensor and the second temperature sensor while the wash water flows from the water supply passage 181 or the circulation passage 151 into the heating box 170 and the heater is operated for a few seconds. It is determined whether the operation signal of the heater is operating.

In more detail, in a state in which washing water that the heater is locked does not flow into the heating box 170, the second temperature sensor is disposed on the side wall of the inlet pipe 191 connected to the lower side of the heater or the bottom of the heating box 170. Since it is installed, it is suitable for measuring the temperature of the washing water that is indirectly heated instead of being heated directly in contact with the heater, the first temperature sensor is installed on the upper side of the heater heating box that emits the heater exposed in the air 170 Will sense the temperature within

Accordingly, the heater is temporarily operated for a time such that there is no abnormality in the safety of the heater even if it is exposed to air, and the heater is operated for a limited time, so that the entire temperature of the heating box 170 is maintained at a constant level. The temperature sensed by the first temperature sensor that directly receives the radiant heat of the heater exposed to the air because it does not operate is immersed in the wash water and is higher than the second temperature sensor that senses the temperature of the wash water that is gradually heated.

By this principle, the heater in operation is no abnormality when it is exposed to air for about 2 seconds, and the controller 190 is about 5 degrees higher than that of the second temperature sensor due to the temporary temporary heater. When the temperature is confirmed, an error signal may be displayed by determining that a small amount of washing water is stored in the heating box 170 such that the safety of the heater is abnormal.

In addition, if the temperature difference between the first temperature sensor and the second temperature sensor is 5 degrees, setting the temperature at which the safety of the heater is abnormal is repeated when the temperature difference between the two sensors exceeds 5 degrees by repeated experiments. It is the number which confirmed that the abnormality occurred.

Therefore, in the present invention, by installing a temperature sensor on the upper side and the lower side of the heater built in the heating box, the heater is checked whether the proper amount of washing water is stored in the storage space of the heating box due to the temperature difference generated between the two sensors. There is an advantage that can not be exposed to the air to burn or break.

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art will be variously modified and changed within the scope of the invention without departing from the spirit and scope of the invention described in the claims below. I can understand that you can.

Claims (3)

In a drum washing machine having a water supply passage for supplying the wash water from the outside and a heater for heating the wash water flowing into the heating box connected to the circulation passage through which the wash water stored in the reservoir is circulated, An inlet pipe connected to a bottom of the heating box and an upper end of the water storage tank and penetrated by a synchronous motor; A first temperature sensor installed at an upper side of the heater to measure a temperature in a state in which the inflow pipe is closed; A second temperature sensor installed under the heater to measure a temperature of the heater; And If the washing water flows into the heating box and the heater is operated for a few seconds and the signal detected by the first temperature sensor is applied as a signal larger than a predetermined value than the signal detected by the second temperature sensor, an error is displayed on the external display means. Drum washing machine with a heater safety device comprising a control unit for transmitting the generated signal. The drum washing machine according to claim 1, wherein the second temperature sensor is installed on an upper side wall of the inflow pipe on the basis of a portion opened and closed by the synchronous motor. The drum washing machine according to claim 1, wherein the heating box includes a backflow preventing film to prevent the washing water flowing from the circulation flow passage back into the water supply flow passage.

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