KR200168017Y1 - Door opening and shutting device of refrigerator - Google Patents

Abstract

The present invention relates to a door opening and closing device of the refrigerator, the purpose of which is to facilitate the opening and closing of the door by using a permanent magnet and an electromagnet and at the same time improve the gasket to reduce the manufacturing cost.

According to the door opening and closing device of the refrigerator according to the present invention, when the pressure change is detected in the control switch 54 configured on the handle 31 of the door 30, the permanent magnet 51 embedded in the cabinet 10 and the repulsive force acts Since the electromagnet 52 is embedded in the door 30 so that the door 30 is pushed from the front surface 12 of the cabinet 10 when the user grasps the handle 31, the door 30 is opened. It can be done easily. In addition, since the storage compartment 20 is kept in a sealed state by the gasket 55 without installing the conventionally used plastic magnet, the manufacturing cost of the gasket 55 is reduced and the assembly workability thereof is improved. have.

Description

Door opening and shutting device of refrigerator

The present invention relates to a refrigerator, and more particularly to a door opening and closing device of the refrigerator to facilitate the opening and closing operation of the door hinged to the cabinet.

In general, the refrigerator is configured to supply the cold air generated from the evaporator of the refrigeration cycle to the storage compartment to maintain the freshness of various foods for a long time.

That is, the refrigerator is made of a steel plate with a built-in heat insulator and includes a cabinet in which a storage compartment is formed, and a door hinged to a front side of the cabinet to open and close the storage compartment.

The storage compartment provided in the cabinet is provided with shelves in multiple stages for storing food in a compartment. The upper and lower ends of the door are coupled to the front surface of the cabinet through a hinge and rotate about the cabinet, and a gasket for sealing a door shelf and a storage compartment into which a small food, such as a beverage, is inserted is stored at the rear of the door. Prepared.

The rubber gasket is mounted along the rear edge of the door opposite to the front of the cabinet when the door is closed to prevent cold leakage of the storage compartment. These gaskets are provided in a pleated shape to have elasticity, and permanent magnets are installed therein in close contact with the front surface of the cabinet made of steel plates.

When the refrigerator configured as described above is driven, the air in the storage compartment is cooled by heat exchange with an evaporator, and as the air in the storage compartment is cooled and contracted, the pressure in the storage compartment becomes lower than atmospheric pressure.

When the door is opened in such a state, the storage compartment is kept at a low pressure lower than atmospheric pressure due to the contraction of air, and the elastic gasket first increases due to the magnetic force that closely contacts the cabinet and the door. The door is opened away from the cabinet.

As a result, since the door is stuck due to the pressure difference between the storage compartment and the outside air at the moment of opening and the permanent magnet built into the gasket on the front of the cabinet, the conventional refrigerator requires a considerable amount of force to open the door. In addition, the manufacturing and assembly of the gasket containing the permanent magnet is difficult, as well as the manufacturing cost thereof is increased.

The present invention is to solve such a problem, an object of the present invention is to provide a door opening and closing device of the refrigerator that can be pushed to the side that the door is opened the moment the user grasps the door handle more easily.

Another object of the present invention is to provide a door opening and closing device of a refrigerator that can reduce the manufacturing cost and improve the assemblage by improving the structure of the gasket installed on the back of the door so that it is easily in close contact with the cabinet without installing a magnet in the gasket. will be.

1 is a schematic view showing a refrigerator according to the present invention.

FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1, showing a state in which the door is closed.

Figure 3 is a control block diagram showing only the electrical configuration of the refrigerator directly related to the present invention.

4 is a cross-sectional view showing an operating state of the door opening and closing apparatus according to the present invention.

* Description of the symbols for the main parts of the drawings *

10. Cabinet 30. Door 31 Handle

33 .. Retaining groove 50. Door opener 51. Permanent magnet

52. Electromagnet 53. Control part 54. Control switch

55 .. Gasket 551. Fastening jaw 553.

554..Turning

The present invention for achieving the above object is a cabinet having a storage compartment formed therein, the top and bottom of one side hinged to the cabinet to open and close the storage compartment in the refrigerator having a door provided with a handle on the front,

Permanent magnet installed on the front of the cabinet facing the door with the door closed,

Electromagnets installed on the door to act as a permanent magnet and repulsive force during power supply,

Control switch installed in the door to control the power of the electromagnet,

A control unit electrically connected to the control switch and controlling the power supply to drive the electromagnet when a signal is input from the control switch,

When the door is closed, it is installed on the back of the door so as to be in close contact with the deformation of the front of the cabinet and is characterized in that it comprises a gasket formed with an air chamber therein.

Hereinafter, one preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, the refrigerator according to the present invention includes a cabinet 10 in which a front side of the storage compartment 20 is partitioned from side to side to store food, and a door 30 for opening and closing an opening of the storage compartment 20. ).

The partition wall 11 is provided in the cabinet 10 to partition the storage compartment 20 from side to side, and the storage compartment 20 is provided with a plurality of shelves 21 for storing food in a compartment.

In addition, the door 30 has a handle 31 which can be grasped by a user by the front part, and a door shelf 32 which accommodates a small food and a bucket is mounted on the rear side up and down. One side of the door 30 is coupled to the front surface 12 of the cabinet 10 through the hinges 41 and 42, the hinge is divided into the upper hinge 41 and the lower hinge 42. That is, the upper end of one side of the door 30 is coupled to the upper part of the cabinet 10 through the upper hinge 41, and the lower end of one side of the door 30 is coupled to the lower part of the cabinet 10 through the lower hinge 42. As a result, the door 30 is rotatably coupled to the left and right about the center.

On the other hand, when the user grasps the handle 31 to open the door 30, the door 30 is pushed toward the open side, so that the door opening and closing device 50 which can more easily open the door 30 is a cabinet. 10 and the door 30 are provided.

The door opening and closing device 50 is deformed when the door 30 is closed, and the soft gasket 55 which comes into close contact with the front surface 12 of the cabinet 10, the permanent magnets 51 installed above and below the cabinet 10, and the door. Electromagnets 52, respectively, installed in the upper and lower portions of the 30, and the control switch 54 and the control unit 53 (see Fig. 3) installed in the handle 31 to control the power supply to the electromagnet 52, the structure thereof Referring to Figure 2 in more detail as follows.

The soft gasket 55 is installed along the rear edge portion of the door 30 opposite to the front surface 12 of the cabinet 10 in a state in which the door 30 is closed, thereby preventing cold leakage of the storage compartment 20. In general, the fastening jaw 551 protruding in the shape of an arrowhead to be fitted into the fixing groove 33 formed along the edge of the door 30 and close to the front surface 12 of the cabinet 10 when the door 30 is closed. An elliptical contact part 553 and a wing part 555 provided to extend from the bottom of the contact part 553 to be in close contact with the rear surface of the door 30 are provided.

An air chamber 552 is formed in the close contact portion 553 so as to have a damping force. In addition, a plurality of protrusions 554 protruding in an inverted triangle shape toward the center of the air chamber 552 are provided on the inner surface of the close contact portion 553 in direct contact with the front surface 12 of the cabinet 10. Therefore, the moment when the gasket 55 touches the front surface 12 of the cabinet 10, the air-filled contact portion 553 is elastically deformed and adhered to the elastic part. The outer surface remains in close contact. As described above, the gasket 55 is simply configured by a fastening jaw 551 fixed to the rear surface of the door 30 and an adhesion part 553 in which an air chamber 552 is formed, thereby reducing its manufacturing cost and facilitating assembly. can do.

The permanent magnets 51 are installed on the upper and lower portions of the front surface 12 of the cabinet 10 corresponding to the other upper and lower ends (opposite ends of the hinge) of the door 30 in the state in which the door 30 is closed. In this embodiment, since the left and right doors 30 are employed, they are embedded in the upper and lower portions of the partition 11 partitioning the storage compartment 20 from side to side.

The electromagnet 52 tightly wraps the insulated wire 522 around the soft iron core 521 and supplies a current thereto to act as a magnet, which acts like a magnet. The other end of the 30 is embedded in the upper end and the lower is disposed corresponding to the permanent magnet (51). The tip end portion of the electromagnet 52 is configured to exhibit the same polarity as the adjacent polarity of the permanent magnet 51 embedded in the cabinet 10. That is, when the polarity of one surface of the door 30 and the permanent magnet 51 corresponding to the S pole, the front end portion of the electromagnet 52 corresponding thereto also forms the S pole when a current is supplied through the controller 53. The permanent magnet 51 and the electromagnet 52 is preferably inserted into the cabinet 10 and the door 30 when the insert is fixed.

And the control switch 54 (see Fig. 1) is installed on the handle 31 configured on the outside of the door 30, the control unit 53 so that the current is supplied to the electromagnet 52 at the same time the user attaches the handle 31 It is preferably connected to the), which is preferably configured as a pressure sensor that the resistance is distorted by the contact with the human body when the user grabs the handle 31 and tries to open the door 30. Therefore, when a minute pressure change is detected from the control switch 54 and an electrical signal is input to the controller 53, the electric current is supplied to the door 30 in anticipation of opening, thereby driving the electromagnet 52. That is, when the door 30 is closed or opened and no load is applied to the handle 31, current is not supplied to the electromagnet 52, and when the user grabs the handle 31 to open the door 30. A signal whose pressure is changed is transmitted to the controller 53 and a current is supplied to the electromagnet 52.

3, the control switch 54 is connected to the input side of the control part 53, and the electromagnet drive part 52A which drives the electromagnet 52 is electrically connected to the output side of the control part 53. As shown in FIG. Therefore, in the state in which the door 30 is closed, the soft iron core 521 of the electromagnet 52 in the off state is stuck to the permanent magnet 51 by the magnetic force of the permanent magnet 51, and the handle 31 is held by the control switch ( When 54 is pressed, electric current is supplied to the electromagnet 52 through the electromagnet driver 52A to generate a repulsive force between the permanent magnet 51 and the electromagnet 52 embedded in the cabinet 10.

Next will be described the operation and effect of the door opening and closing device according to the present invention configured as described above.

First, in the state in which the door 30 is closed, as shown in FIG. 2, the soft iron core 521 of the electromagnet 52 embedded in the upper and lower ends of the other side of the door 30 is different due to the magnetic force of the permanent magnet 51. By being attached, the front of the contact portion 553 of the gasket 55 is in close contact with the front surface 12 of the cabinet 10 to keep the storage compartment 20 in a sealed state.

In this state, when the user presses the control switch 54 while holding the handle 31 to open the door 30, a signal whose pressure is changed is transmitted to the controller 53, and the electromagnet 52 is passed through the electromagnet driver 52A. ) Is supplied with current. As a result, a magnetic field is generated at the excitation of the electromagnet 52 so that the same polarity (S pole) as the adjacent surface of the permanent magnet 51 embedded in the cabinet 10 is shown in the front end portion of the soft iron core 521. By being formed, the repulsive force acts between the permanent magnet 51 and the electromagnet 52.

As the door 30 is pushed by the repulsive force between the electromagnet 52 and the permanent magnet 51, the gasket 55 is dropped to open the door 30. That is, the gasket 55 adjacent to the electromagnet 52 is spaced apart from the front surface 12 of the cabinet 10, and the door 30 is hinged 41 and 42 when the handle 31 is pulled forward. It is easily opened while rotating about the center.

When the handle 31 of the door 30 is released, the pressure change is not sensed from the control switch 54 so that the current supply to the electromagnet 52 is cut off, and when the food 30 is taken out again, the door 30 is closed again. The soft iron core 521 of 52 attaches to the permanent magnet 51 embedded in the cabinet 10 to keep the door 30 closed, and at the same time, the contact portion 553 of the gasket 55 is connected to the cabinet 10. It is in close contact with the front surface 12 of the cold air leakage is prevented.

As described above in detail, according to the door opening and closing apparatus of the refrigerator according to the present invention, when a pressure change is detected in the control switch configured in the handle of the door, the electromagnet is embedded in the door so that the permanent magnet embedded in the cabinet and the repulsive force act Therefore, the door can be more easily opened by pushing the door from the front of the cabinet at the moment the user grasps the handle. In addition, since the storage compartment is kept closed by the gasket without installing the plastic magnet used in the related art, the manufacturing cost of the gasket is reduced and the assembly workability thereof is improved.

Claims (3)

In the cabinet having a storage compartment formed inside, a refrigerator having a door having a handle at the front and the front and bottom of the cabinet is hinged coupled to the upper and lower ends of the cabinet, the front, Permanent magnet 51 installed on the front surface 12 of the cabinet 10 facing the door 30 in the state in which the door 30 is closed, An electromagnet 52 installed in the door 30 so that the permanent magnet 51 and the repulsive force act upon power supply; A control switch 54 installed in the door 30 to control the power of the electromagnet 52, The control unit 53 is electrically connected to the control switch 54, the control unit 53 for controlling the power supply so that the electromagnet 52 is driven when a signal is input from the control switch 54, When the door 30 is closed, the gasket 55 is installed on the rear surface of the door 30 so as to be in close contact with the front surface 12 of the cabinet 10 and has an air chamber 552 formed therein. Door opening and closing device of the refrigerator. The method of claim 1, The control switch 54 is a door opening and closing device of the refrigerator, characterized in that installed on the handle 31 so as to detect the contact of the body. The method of claim 1, The gasket 55 includes a fastening jaw 551 coupled to the fixing groove 33 formed on the rear surface of the door 30 and an air chamber 552 formed therein, so that the front surface 12 of the cabinet 10 is formed. A contact portion 553 in contact with The door opening and closing device of the refrigerator, characterized in that a plurality of protrusions (554) protruding in an inverted triangle shape is provided on the inner surface of the contact portion (553).