KR101263318B1 - Apparatus for preventing overheating and drum type washing machine therewith - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drum washing machine, and more particularly, to an overheat prevention device and a drum washing machine having the same, which can prevent overheating of a heater used when performing a washing operation.

The overheat prevention apparatus according to the present invention is a cabinet, a tub installed inside the cabinet to wash water fresh water, a heater installed on the tub to supply thermal energy, a two-contact switch installed on the power line supplied to the heater, the two contacts A switch is supported to be connected to the first contact point electrically connected to the heater, and the support is made of a fusible material, and is installed at the two contact point switch, and when the support force of the support is released, the two contact point switch is connected to the second contact point. It characterized in that it comprises an elastic member to be connected.

Drum Washing Machine, Overheating Prevention Device, Tub, Heater, 2 Position Switch

Description

Overheat prevention device and drum washing machine having same {APPARATUS FOR PREVENTING OVERHEATING AND DRUM TYPE WASHING MACHINE THEREWITH}

1 is a block diagram showing a conventional drum washing machine.

2 is a block diagram showing a drum washing machine according to an embodiment of the present invention.

3 is a partially enlarged view showing an overheat prevention apparatus according to an embodiment of the present invention.

Figure 4 is a block diagram showing an overheat prevention apparatus according to an embodiment of the present invention.

5 is a circuit diagram showing an overheat prevention apparatus according to an embodiment of the present invention.

DESCRIPTION OF THE REFERENCE NUMERALS

50: cabinet 52: tub

54 drum 56 drive device

58: water supply 59: drainage

60: heater 80: overheat prevention device

82: two-contact switch 84: support

86: elastic member 88: cold valve

89: alarm

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drum washing machine, and more particularly, to an overheat prevention device and a drum washing machine having the same, which can prevent overheating of a heater used when performing a washing operation.

1 is a block diagram showing a conventional drum washing machine.

Referring to FIG. 1, the drum washing machine according to the related art is provided with a cabinet 10 having an opening formed therein, a tub 2 installed inside the opening to receive fresh water, and rotatably installed inside the tub 2. The drum 4 accommodated therein, the driving device 6 installed on the tub 2 and connected to the drum 4, and the water supply device extending from the tub 2 to the outside of the cabinet 10 to supply washing water. (8), a drainage device (9) extending from the tub (2) to the outside of the cabinet (10) to discharge the wash water, and a heater (12) installed in the tub to heat the wash water.

Here, the heater 12 is to enable washing by heating the laundry during the washing operation, the concave portion (2a) is formed concavely at the bottom of the tub (2), the heater (2) 12 is inserted inward from the outside of the tub 2.

As a result, when power is applied to the heater 12, since the heating is performed from the lower side among the washing water freshwater inside the tub 2, the heated washing water flows upward and comes into contact with the laundry to achieve washing.

However, the drum washing machine according to the related art is installed with a conventional overheat prevention device such as a fuse or a temperature sensor to prevent overheating of the heater 12, so that a malfunction occurs in the temperature sensor or the fuse is not blown. The drum is overheated, there is a problem that may cause a fire accident or explosion accident.

The present invention has been made to improve the above problems of the prior art, and an object of the present invention is to provide an overheat prevention device and a drum washing machine having the same so as to accurately measure whether the tub is overheated.

The overheat prevention device according to the present invention for solving the above problems is a cabinet, a tub installed inside the cabinet is a fresh water wash, a heater installed in the tub to supply thermal energy, is installed in the power line supplied to the heater Supporting the two-contact switch, the two-contact switch to be connected to the first contact electrically connected to the heater, a support made of a fusible material, and is installed on the two-contact switch and the support force of the support is released when the 2 It characterized in that it comprises an elastic member for connecting the contact switch to the second contact.

In addition, the second contact of the present invention is characterized in that it is electrically connected to the cold water valve to determine whether the supply of cold water to the tub.

In addition, the second contact of the present invention is characterized in that it is electrically connected to the alarm indicating the overheating of the tub.

In addition, a drum washing machine having an overheat prevention device according to the present invention is installed in a cabinet, a tub installed inside the cabinet to wash water, a heater installed at the tub to supply thermal energy, and a power line supplied to the heater. A contact switch, the two-contact switch is supported so as to be connected to the first contact electrically connected to the heater, a support made of a fusible material, and the two contact is installed on the two-contact switch to release the support force of the two contacts And an overheat prevention device including an elastic member for connecting the switch to the second contact point.

Hereinafter, with reference to the accompanying drawings an embodiment of the overheat prevention device and a drum washing machine having the same according to the present invention will be described in detail.

For convenience of description, a drum washing machine having an overheat prevention device will be described as an example.

In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator.

Therefore, definitions of these terms should be made based on the contents throughout this specification.

Figure 2 is a block diagram showing a drum washing machine according to an embodiment of the present invention, Figure 3 is a partially enlarged view showing an overheat prevention device according to an embodiment of the present invention, Figure 4 is an embodiment of the present invention 5 is a block diagram illustrating an overheat prevention device according to an embodiment, and FIG. 5 is a circuit diagram illustrating an overheat prevention device according to an embodiment of the present invention.

2 to 5, the drum washing machine according to an embodiment of the present invention, the cabinet 50 is formed with an opening, the tub 52 is installed in the opening and fresh water wash, and the tub 52 inside A drum 54 rotatably installed in the laundry to accommodate the laundry, a driving device 56 installed on the tub and connected to the drum, and a water supply extending from the tub 52 to the outside of the cabinet 50 to supply the washing water; A device (58), a drainage device (59) extending from the tub (52) to the outside of the cabinet (50) to discharge the wash water, a heater (60) installed in the tub to perform washing operation by supplying heat energy, and It is connected to the heater 60 includes a overheat prevention device 80 to cut off the power supply to the heater 60 when the temperature of the portion where the heater 60 is installed is overheated above a predetermined temperature.

Thus, when the drum 54 is rotated by the driving device 56, and power is applied to the heater 60, washing operation is performed by the heat energy supplied from the heater 60.

If the heater 60 is heated more than necessary when such a washing operation is performed, the power supply to the heater 60 is stopped by the overheat prevention device 80 to perform a safe washing operation.

Here, the overheat prevention device 80 supports a two-contact switch 82 installed on a power line supplied to the heater 60 and a first contact point which is electrically connected to the heater 82 by supporting the two-contact switch 82. And a support stand 84 made of a fusible material, and installed on the two-contact switch 82 so that the support force of the support stand 84 is released, the two-contact switch 82 is connected to the second contact point 82b. It includes an elastic member 86 to be connected to.

As a result, when the washing operation is started, the drum 54 is rotated by the driving device 56, and power is applied to the heater 60 to perform washing washing.

Then, when the heater 60 is heated by a malfunction of the heater 60, the two-contact switch 82 by the restoring force of the elastic member 86 melts while the support 84 made of a material having a low melting point, such as a paraffin mixture, is melted. It comes into contact with the second contact 82b.

Since the power supply to the heater 60 is cut off by the operation of the two-contact switch 82, the tub 52 and the washing water are no longer heated.

The second contact 82b is electrically connected to a cold water valve 88 that determines whether cold water is supplied to the tub 52, and is electrically connected to an alarm 89 that indicates overheating of the tub 52.

As a result, cold water is supplied to the inside of the overheated tub 52 to prevent deformation or damage due to overheating and to allow the user to recognize the same.

Looking at the action of the overheat prevention device and a drum washing machine having the same according to an embodiment of the present invention configured as described above are as follows.

First, when the laundry operation is started after storing the laundry in the drum 54, the washing water is supplied to the tub 52 by the water supply device 58, and the drum 54 is rotated by the driving device 56. Washing operation is performed.

At this time, when power is applied to the heater 60, washing operation boiled by thermal energy is made, and when the tub 52 is heated more than necessary by the malfunction of the heater 56, the support 84 having a low melting point melts. The elastic member 86 pushes the two-contact switch 82 and is connected to the second contact 82b to supply power to the cold water valve 88 and the alarm 89.

As a result, the tub 52 is supplied with cold water to prevent deformation or damage due to overheating, and the user is aware of this by the output of the alarm 89, so that safety instructions such as terminating the operation of the washing machine can be performed. .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. .

In addition, the drum washing machine having an overheat prevention device has been described as an example, but this is merely exemplary, and the overheat protection device of the present invention may be used in other products other than the overheat protection device used in the drum washing machine.

Therefore, the true technical protection scope of the present invention will be defined by the claims below.

The overheat prevention device and the drum washing machine having the same according to the present invention constituted as described above are provided with a safety device made of mechanical members such as a 2-contact switch, a support, an elastic member, and thus, a safety device without malfunction can be achieved. And the reliability of the product is improved.

Claims (4)

cabinet; A tub installed inside the cabinet to wash water; A heater installed at the tub to supply thermal energy; A two-contact switch installed on a power line supplied to the heater; A support for supporting the two-contact switch so as to be connected to the first contact point electrically connected to the heater and made of a fusible material; And And an elastic member installed at the two contact switch so that the two contact switch is connected to the second contact when the support force of the support is released. The second contact is overheat prevention device, characterized in that electrically connected to the cold water valve to determine whether the supply of cold water to the tub. delete The method of claim 1, And the second contact point is electrically connected to an alarm indicating an overheating of the tub. cabinet; A tub installed inside the cabinet to wash water; A heater installed at the tub to supply thermal energy; A two-contact switch installed on a power line supplied to the heater; A support for supporting the two-contact switch so as to be connected to the first contact point electrically connected to the heater and made of a fusible material; And And an elastic member installed at the two contact switch so that the two contact switch is connected to the second contact when the support force of the support is released. The second contact drum washing machine, characterized in that provided with an overheat prevention device electrically connected to the cold water valve for determining whether the cold water is supplied to the tub.

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