KR101437986B1 - Refrigerator with electromagnet - Google Patents

Abstract

The present invention relates to a refrigerator having an electromagnet. The refrigerator includes a main body electromagnet portion and a door electromagnet portion which are respectively disposed in a refrigerator body and a door, a sensing portion that senses a door opening and closing operation of a user, And a control unit for controlling the arm portion and the door electromagnet portion. As a result, the opening and closing of the door can be facilitated, and the magnetic force can be selectively generated, thereby reducing the possibility of damage to electronic products and components due to the magnetic force.

Refrigerator, cooling chamber, door, main body electromagnet, door electromagnet

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a refrigerator having an electromagnet,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator having an electromagnet, and more particularly, to a refrigerator having an electromagnet for facilitating opening and closing of a door by a magnetic force.

The refrigerator is a device that allows food to be kept fresh by refrigeration or freezing, as is well known. The refrigerator includes a refrigerator body having a cooling chamber formed therein, and a refrigeration cycle for providing cool air to the cooling chamber. The refrigeration cycle includes a compressor for compressing refrigerant, a condenser for condensing the compressed refrigerant, an expansion device for expanding the refrigerant under reduced pressure, and an evaporator for evaporating the refrigerant by absorbing the latent heat of the surrounding refrigerant, Type refrigeration cycle.

1 is a perspective view showing an example of a conventional refrigerator. 1, the refrigerator includes a refrigerator body 10 in which a refrigerator compartment 20 and a freezer compartment 30 are formed, a refrigerator compartment door 25 for opening and closing the refrigerator compartment 20 and the freezer compartment 30, And a freezing chamber door 35. [

A refrigerator compartment 20 is formed in an upper area of the refrigerator body 10. A plurality of refrigerator compartment doors 25 are provided on the front of the refrigerator compartment 20 to open and close the refrigerator compartment 20.

A freezing chamber 30 is formed in a lower region of the refrigerator body 10 and a freezing chamber door 35 is provided in the freezing chamber 30 so as to be slidable along the front and rear directions of the refrigerator body 10. The storage container 37 is slid back and forth integrally with the freezer compartment door 35. The storage compartment 37 is provided at the rear of the freezer compartment door 35 to accommodate food.

Door gaskets 26 are provided on the inner surfaces of the refrigerating chamber door 25 and the freezing chamber door 35 so as to be in contact with the rims of the openings of the refrigerating chamber 20 and the freezing chamber 30, . The door gasket 26 is provided with a permanent magnet (not shown) to prevent leakage of cold air between the door gasket 26 and the refrigerator body 10. [

In this conventional refrigerator, each door gasket 26 of the refrigerator compartment door 25 and the freezer compartment door 35 is provided with permanent magnets so as to be magnetically coupled to each front surface of the refrigerator body 10, A problem that the opening of the refrigerator compartment door 25 and the freezer compartment door 35 becomes difficult due to the action of the magnetic force of the permanent magnet when the refrigerator compartment door 25 and the freezer compartment door 35 are opened have.

In consideration of such a problem, in some refrigerators, permanent magnets are disposed in the refrigerator body 10 and either one of the doors 25 and 35, and electromagnets are disposed in the other, So that the user can open the doors 25 and 35 easily when the doors 25 and 35 are opened. However, since permanent magnets always have a magnetic field around them due to their characteristics, there is a problem that an electronic product may be adversely affected when the electronic product is exposed to the magnetic field. In particular, since a relatively large magnetic force is required to open the doors 25 and 35, a relatively large permanent magnet is required and the intensity of the magnetic force increases accordingly. Therefore, when the electronic product is exposed in the magnetic field of the permanent magnet, The possibility of the damage of the battery is increased. Further, when the permanent magnet sucks the surrounding magnetic body and closes the doors 25, 35 with the magnetic body attached to the permanent magnet, the closing of the doors 25, 35 by the magnetic body becomes incomplete, There is a problem that the refrigerator body 10 or the doors 25 and 35 may be damaged when the doors 25 and 35 are closed.

Accordingly, it is an object of the present invention to provide a refrigerator having an electromagnet which can facilitate the opening and closing of a door.

Another object of the present invention is to provide a refrigerator having an electromagnet which can easily open and close a door and can suppress side effects due to magnetic force.

In order to achieve the above object, the present invention provides a refrigerator comprising: a refrigerator body having a cooling chamber formed therein; A door having a door gasket having a permanent magnet so as to be magnetically coupled to a front opening of the cooling chamber to open and close the cooling chamber; A door switch for sensing an opened state or a closed state of the door; A main body electromagnet portion formed in the refrigerator main body; A door electromagnet portion formed on the door so as to correspond to the main body electromagnet portion; A sensing unit for sensing an opening and closing operation of the door of the user; And a controller for controlling the main body electromagnet part and the door electromagnet part based on the detection result of the sensing part, wherein when the opening operation of the door is sensed, a repulsive force acts between the main body electromagnet part and the door electromagnet part And controlling the main body electromagnetic portion and the door electromagnet portion so that a suction force acts between the main body electromagnetic portion and the door electromagnetic portion when the door is closed, To provide a refrigerator having an electromagnet.
Here, the sensing unit may include a contact-type switch that operates when the sensing unit contacts the user.
The contact type switch may be disposed on the handle of the door.
The sensing unit may include a non-contact type switch having a sensing zone and operated when the user's body is sensed in the sensing zone.
The non-contact type switch may be disposed on the handle of the door.
And a speed sensing unit for sensing a moving speed of the door.
Wherein the control unit controls the main electromagnetic portion and the door electromagnet portion such that suction force acts between the main electromagnetic portion and the door electromagnetic portion when the speed of movement of the door by the speed sensing portion exceeds the set value when the door is opened, So that the opening speed of the door can be reduced.
The controller may be configured to control the body electromagnet part and the door electromagnet part so that suction force acts between the main body electromagnetic part and the door electromagnet part for a predetermined time after the door switch is closed by the door switch.
Wherein when the door movement speed of the door by the speed sensing unit exceeds a predetermined value when the door is closed, a repulsive force acts between the main body electromagnetic portion and the door electromagnetic portion, So that the closing speed of the door can be reduced.
Wherein the main body electromagnetic portion and the door electromagnet portion are each composed of a plurality of members, and when the moving speed of the door when the door is closed exceeds a predetermined value, The door can be controlled to be operated in a direction in which the moving speed of the door is reduced.
Wherein the main body electromagnetic portion and the door electromagnet portion are each composed of a plurality of members, and when the moving speed of the door when the door is opened exceeds a predetermined value, So that the door can be controlled to be operated in a direction in which the moving speed of the door is reduced.

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As described above, according to the present invention, an electromagnet is installed in each of the refrigerator body and the door, the opening and closing operation of the door is easily performed by detecting the opening and closing operation of the user and controlling the main body electromagnetic part and the door electromagnet part based on the detection result . That is, when the door is opened, a repulsive force acts between the refrigerator body and the door, and when the door is closed, a suction force acts between the refrigerator body and the door, thereby facilitating opening and closing of the door.

Since the magnetic force is selectively generated only when the door is opened and closed, magnetic forces are not generated other than the opening and closing operations of the door, thereby reducing the possibility of damaging the electronic product due to the magnetic force. In addition, the possibility of attracting the magnetic body can be lowered, so that the door is incompletely closed due to the suction of the magnetic body, or the door is closed with the magnetic body attached, thereby reducing the possibility of damaging the door.

According to the present invention, there is further provided a speed sensing part for sensing the moving speed of the door, and the rapid moving door can be prevented from being closed by reducing the moving speed of the door according to the speed sensing result of the door, It is possible to suppress the occurrence of damage to the substrate.

Further, according to the present invention, it is possible to easily open and close the door, to reduce the possibility of damage to the electronic product and the possibility of damage to the component caused by the constant occurrence of the magnetic force, Convenient and safe refrigerator is provided.

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

2 is a perspective view of a refrigerator having an electromagnet according to an embodiment of the present invention, Fig. 3 is a plan view of the refrigerator of Fig. 2, Fig. 4 is a sectional view taken along the line IV- FIG. 6 is a modification of the sensing unit of the refrigerator of FIG. 2, and FIG. 7 is a control block diagram of the refrigerator of FIG. 2. Referring to FIG. A refrigerator having the electromagnet includes a refrigerator body (110) having a cooling chamber (120) formed therein; A door 125 for opening and closing the cooling chamber 120; A main body electromagnet part 150 formed on the refrigerator main body 110; A door electromagnet portion 170 formed on the door 125 so as to correspond to the main body electromagnet portion 150; A sensing unit 180 sensing a door opening / closing operation of the user; A control unit 210 for controlling the main body electromagnetic unit 150 and the door electromagnetic unit 170 based on the detection result of the sensing unit 180; . The refrigerator body 110 may be configured to include only one of the freezer compartment 130 and the refrigerating compartment 1230. In this case,

2 and 3, a refrigerating chamber 120 is formed in an upper region of the refrigerator body 110. A front opening of the refrigerating chamber 120 can be selectively opened and closed at the front of the refrigerating chamber 120 And a pair of refrigerating compartment doors 125 are rotatably coupled. Door switches 211 are provided on either one of the refrigerating chamber door 125 or the refrigerator body 110 to detect opening and closing of the corresponding refrigerating chamber door 125. A door gasket 126 having permanent magnets (not shown) is provided on the inner surface of each refrigerator compartment door 125 so as to be magnetically coupled to a rim of a front opening of the refrigerating compartment 120. A freezing chamber door 135 is provided at a lower portion of the refrigerator body 110 to open and close the front opening of the freezing chamber 130 while sliding along the front and rear directions of the refrigerator body 110.

The main body electromagnetic induction part 150 and the door electromagnetic part 170 are formed on the upper end of the refrigerator main body 110 and the upper end of each refrigerator compartment door 125 so as to generate magnetic force when power is applied thereto. Here, the door electromagnetic portion 170 and the body electromagnetic portion 150 may be installed in the freezing chamber door 135 and the freezing chamber 130, respectively. In addition, the number of installation of the main body electromagnetic portion 150 and the door electromagnetic portion 170 can be appropriately adjusted. Hereinafter, a case where a door electromagnetic portion 170 is installed in the refrigerator compartment door 125 will be described. In addition, since the main body electromagnetic portion 150 and the door electromagnetic portion 170 are similar in structure, the main body electromagnetic portion 150 will be described with reference to FIG. The body electromagnetic portion 150 and the door electromagnetic portion 170 are configured to generate a proper magnetic force in consideration of the load of each door 125 and the strength of the magnetic force of the permanent magnet of the door gasket 126. [

4, the main body magnet unit 150 includes a bobbin 151, a coil 155 wound around the bobbin 151 to generate a magnetic force when a power is applied thereto, A yoke plate 165 disposed on one side of the core 161 and the bobbin 151 and a yoke plate 161 disposed on the outer periphery of the bobbin 151 to face each other, 169).

The core 161 is formed of a magnetic material in the shape of a quadrilateral plate, and one end of the core 161 is formed with a locking protrusion 163 extending along the width direction.

The bobbin 151 is formed by an insulating member (for example, a synthetic resin member) that can be wound around the coil 155. A core hole 153 is formed in the central region of the bobbin 151 so that the core 161 can be received and coupled. The bobbin 151 is formed to have a length such that one end of the core 161 can protrude to the outside.

The yoke plate 165 and the yoke side plate 169 are each formed of a magnetic material so as to cooperatively form a magnetic path with the core 161. The yoke plate 165 is provided with a protrusion 163 are inserted into the through holes 166. A through hole 166 is formed in the periphery of the through hole 166 so as to engage with the engaging protrusion 163.

On the front of each refrigerator compartment door 125, a handle 141 is formed to facilitate opening and closing of the refrigerator compartment door 125. The handle 141 is connected to the upper and lower ends of the rod portion 143 so that the rod portion 143 is connected to the respective refrigerating chamber And a support portion 145 for supporting the door 125 at a predetermined distance from the front surface of the door 125. A sensing unit 180 is formed on the handle 141 to sense opening and closing operations of the user's fridge door 125.

5, the sensing unit 180 includes a light emitting unit 181 disposed on the upper support unit and a light receiving unit 183 disposed on the lower support unit. The light emitting unit 181 and the light receiving unit 183 And a non-contact type switch for sensing that the user opens the corresponding refrigerator compartment door 125 when the user's hand is located in the sensing area between the user's hand Here, the mounting positions of the light emitting unit 181 and the light receiving unit 183 can be appropriately adjusted.

6, when the user grips the handle of the refrigerator compartment door 125, the sensing unit 190 may be configured as a touch-type switch for sensing the opening / closing operation of the user by pressing the switch have. The sensing unit 190 includes an operating unit 191 disposed on the rear surface of the rod unit of the refrigerator compartment door 125 so as to be pushed and operated and a pressing member 191 pressed and operated by the operating unit 191 when the operating unit 191 is pressed. And a spring 195 for exerting an elastic force such that the operating portion 191 is spaced apart from the switch 193. [ A depression 144 is formed on the rear surface of the rod portion 143 so that the manipulation portion 191 can be movably received. The rod portion 191 is movably supported on the manipulation portion 191 And a securing screw 197 for preventing disconnection.

7, a control unit 210 having a control program and configured in the form of a microprocessor or the like is connected to a door switch (not shown) of each refrigerator compartment door 125 that detects the opening or closing state of each refrigerator compartment door 125 211 and a sensing unit 180 for sensing the opening and closing operation of the user's fridge door 125, respectively. The control unit 210 controls the pressing force between the main body electromagnetic part 150 and the door electromagnetic part 170 when the refrigerator door 125 is opened based on the detection result of the door switch 211 and the sensing part 180. [ And controls the main body electromagnetic portion 150 and the door electromagnetic portion 170 so that a suction force acts between the main body electromagnetic portion 150 and the door electromagnetic portion 170 when the refrigerator compartment door 125 is closed do.

With this configuration, when the user holds the handle 141 of the refrigerator compartment door 125, that is, the rod portion 143, in order to open the refrigerator compartment door 125 in a state where the refrigerator compartment door 125 is closed, The irradiated light is blocked by the user's hand, and the light receiving unit 183 can not detect the light irradiated from the light emitting unit 181. [ The control unit 210 determines that the door of the refrigerator compartment door 125 is opened because the door switch 211 has already recognized that the door of the refrigerator compartment door 125 is blocked, And controls the main body electromagnetic portion 150 and the door electromagnet portion 170 so that a repulsive force acts between the main body portion 170 and the main body portion 170. [ Thus, the refrigerating compartment door 125 is rotated to open the refrigerating compartment 120. At this time, when the door switch 211 detects the opening of the refrigerator compartment door 125, the controller 210 turns off the electric power of the main body electromagnetic unit 150 and the door electromagnetic unit 170.

When the closing of the refrigerator compartment door 125 opened by the door switch 211 is sensed, the controller 210 applies suction force for a predetermined period of time between the main body electromagnetic part 150 and the door electromagnetic part 170 And controls the main body electromagnetic unit 150 and the door electromagnet unit 170 so that the main body electromagnetic unit 150 and the door electromagnet unit 170 are controlled. As a result, the refrigerator compartment door 125 is incompletely closed and the generation of cold air leakage can be suppressed.

FIG. 8 is a perspective view of a refrigerator having an electromagnet according to another embodiment of the present invention, FIG. 9 is a cross-sectional view of the freezing chamber door area of FIG. 8, and FIG. 10 is a control block diagram of the refrigerator of FIG. The same reference numerals are used for the same or equivalent parts as those of the above-described embodiment and the drawings, and the description thereof will be omitted for simplicity. 8 and 9, the refrigerator having the electromagnet includes a refrigerator body 110 in which a cooling chamber 130 is formed; A door 135 for opening and closing the cooling chamber 130; A main body electromagnet part 240 formed on the refrigerator main body 110; A door electromagnet part 250 formed on the door 135 in correspondence with the main body electromagnetic part 240; A sensing unit 180 for sensing a door opening / closing operation of the user; A control unit 230 for controlling the main body electromagnetic unit 240 and the door electromagnet unit 250 based on the sensing result of the sensing unit 180; .

The freezing chamber door 135 includes a receiving portion 136 for accommodating food therein and a door portion 137 disposed on the front surface of the receiving portion 136. On both sides of the storage part 136, a raising part 139 which can be stretched along the longitudinal direction may be installed. On the rear surface of the door part 137, A door gasket 138 is provided with a permanent magnet (not shown) so that it can be engaged. A knob 140 is disposed on the front surface of the freezing chamber door 135 so as to facilitate opening and closing of the freezing chamber door 135. The handle 140 is provided on the rear surface thereof with a door A sensing unit 180 is provided. The sensing unit 180 may include a non-contact type switch having a light emitting unit 181 and a light receiving unit 183 disposed on the back surface of the handle rod unit, as described above with reference to FIG. 6, the sensing unit 190 may be configured in the form of a touch switch including an operation unit 191 and a switch 193 and a spring 195. [ A door switch 211 is provided on either one of the freezing chamber door 135 and the freezing chamber 130 to detect opening and closing of the freezing chamber door 135.

A plurality of door electromagnet parts 250 are formed on the door part 137 in an inner lower region of the door part 137. In correspondence with this, a plurality of main body electromagnetic coil portions 240 are formed on the lower edge of the front opening of the freezing chamber 130. Each of the main body electromagnetic unit 240 and the door electromagnetic unit 250 includes a bobbin 151, a coil 155 wound around the bobbin 151, A yoke plate 165 disposed on one side of the core 161 and the bobbin 151 and a yoke 151 disposed on the outer periphery of the bobbin 151. The yoke 151, And a side plate 169, respectively.

As shown in FIG. 10, the controller 230, which is implemented in the form of a microprocessor having a control program, includes a door switch 211 for detecting whether the freezer compartment door 135 is open or closed, The sensing unit 180 and the speed sensing unit 221 for sensing the moving speed of the freezing chamber door 135 are connected to each other. A suitable magnetic force is generated between the main body magnet unit and the door magnet unit based on the detection result of the door switch 211, the sensing unit 180 and the speed sensing unit 221, The main body magnet portion and the door magnet portion are connected to each other.

When the moving speed of the freezing compartment door 135 sensed by the speed sensing unit 221 exceeds a set value, the controller 230 controls the moving speed of the freezing compartment door 135 to be reduced, And can be configured to control the magnet portion. At this time, the controller 230 may control all or a part of the plurality of main body electromagnetic unit 240 and the door electromagnet unit 250 according to the moving speed of the freezing chamber door 135. This prevents damage to a human body or an object when a human body or an object is caught between the opening of the freezing chamber 130 and the freezing chamber door 135. In addition, when the user opens the freezing chamber door 135, So as to prevent the freezing chamber door 135 from being opened suddenly.

Hereinafter, the operation and effect of the refrigerator having the electromagnet having the above-described constituent features will be described.

When the user desires to open the freezing chamber door 135 in a state that the freezing chamber door 135 is closed, the controller 230 controls the freezing chamber door 135 to be closed by sensing the door switch 211 If the user senses that the grip 140 of the freezing chamber door 135 is gripped by the sensing unit 180, the controller determines that the freezing chamber door 135 is opened. Accordingly, the controller 230 controls the repulsive force between the main body electromagnetic part 240 and the door electromagnetic part 250 so that the freezing room door 135 can be opened easily.

When the freezing chamber door 135 is moved, the controller 230 senses the moving speed of the freezing chamber door 135 by the speed sensing part 221 and the user pulls the freezing chamber door 135 forcibly to open the freezing chamber door 135 When the moving speed of the door electromagnet part 240 and the door electromagnet part 250 is greater than a set value, the main electromagnetic part 240 and the door electromagnet part 250 are attracted by the suction force between the main electromagnetic part 240 and the door electromagnet part 250, So that the moving speed of the freezing chamber door 135 is reduced.

Meanwhile, when the freezing chamber door 135 is opened, the freezing chamber door 135 is opened by the door switch 211 and the sensing unit 180 is opened. It is determined that the freezing chamber door 135 is to be blocked. When the freezing compartment door 135 is moved in the closing direction, the controller 230 senses the moving speed by the speed sensing unit 221. When the sensed result moving speed exceeds the set value, the controller 230 The main body electromagnetic part 240 and the door electromagnet part 250 are controlled so that a repulsive force acts between the main body electromagnetic part 240 and the door electromagnetic part 250, So that the moving speed is reduced.

When the door switch 211 detects the closing of the freezing chamber door 135, the control unit 230 applies a suction force between the main body electromagnetic part 240 and the door electromagnetic part 250 for a predetermined period of time, And controls the electromagnetic portion 240 and the door electromagnet portion 250 to prevent the freezing chamber door 135 from being incompletely closed.

In the above-described embodiments, a so-called bottom freezer-type refrigerator in which a refrigerator compartment is formed on an upper portion of a refrigerator body and a freezer compartment is formed on an upper portion of the refrigerator body is described as an example. However, the freezer compartment and the refrigerating compartment may be called side by side Type side refrigerator, or a so-called top mount type refrigerator in which a freezer compartment is formed on an upper portion of a refrigerator body and a refrigerating compartment is formed on a lower portion thereof.

In the embodiment described above with reference to Figs. 2 to 7, a door electromagnet portion is formed in the refrigerator compartment door and the main body electromagnet portion is configured to correspond to the door electromagnets in the refrigerator body. However, And the main body electromagnet portion may be formed at a position corresponding thereto.

8 to 10, an example is described in which a door electromagnet portion is formed in a freezing chamber door and a main electromagnet portion is disposed at a position corresponding to the door electromagnet portion. However, The electromagnet portion may be formed and the main electromagnet portion may be disposed at a position corresponding to the electromagnet portion.

1 is a perspective view showing an example of a conventional refrigerator,

FIG. 2 is a perspective view of a refrigerator having an electromagnet according to an embodiment of the present invention, FIG.

Fig. 3 is a plan view of the refrigerator of Fig. 2,

4 is a sectional view taken along the line IV-IV in Fig. 3,

FIG. 5 is a view showing the sensing unit of the refrigerator of FIG. 2;

6 is a modification of the sensing part of the refrigerator of FIG. 2,

FIG. 7 is a control block diagram of the refrigerator of FIG. 2;

FIG. 8 is a perspective view of a refrigerator having an electromagnet according to another embodiment of the present invention, FIG.

Figure 9 is a cross-sectional view of the freezer compartment door area of Figure 8,

10 is a control block diagram of the refrigerator of Fig.

Description of the Related Art [0002]

110: Refrigerator body 120: Refrigerator

125: refrigerator door 130: freezer compartment

135: Freezer door 141: Handle

143: rod portion 145: support portion

150: main body electromagnet part 151: bobbin

153: core ball 155: coil

161: core 165: yoke plate

169: yoke plate 170: door electromagnet

180: sensing unit 181:

183: light receiving unit 210:

211: Door switch

Claims (11)

A refrigerator main body having a cooling chamber formed therein; A door having a door gasket having a permanent magnet so as to be magnetically coupled to a front opening of the cooling chamber to open and close the cooling chamber; A door switch for sensing an opened state or a closed state of the door; A main body electromagnet portion formed in the refrigerator main body; A door electromagnet portion formed on the door so as to correspond to the main body electromagnet portion; A sensing unit for sensing an opening and closing operation of the door of the user; And a controller for controlling the main body electromagnet part and the door electromagnet part based on the detection result of the sensing part, Wherein the controller controls each of the main body electromagnetic portion and the door electromagnet portion so that a repulsive force acts between the main body electromagnetic portion and the door electromagnetic portion when the door is opened, And controls the main electromagnetic portion and the door electromagnet portion so that a suction force acts between the main electromagnetic portion and the door electromagnetic portion when the door is closed. The method according to claim 1, Wherein the sensing unit includes a contact-type switch that operates when the sensing unit contacts the user. 3. The method of claim 2, And the contact type switch is disposed at a handle of the door. The method according to claim 1, Wherein the sensing unit includes a non-contact type switch having a sensing zone and operated when a user's body is sensed in the sensing zone. 5. The method of claim 4, And the non-contact type switch is disposed on a handle of the door. 6. The method according to one of claims 1 to 5, Further comprising a speed sensing unit for sensing a moving speed of the door. The method according to claim 6, Wherein the control unit controls the main electromagnetic portion and the door electromagnet portion such that suction force acts between the main electromagnetic portion and the door electromagnetic portion when the speed of movement of the door by the speed sensing portion exceeds the set value when the door is opened, Wherein the opening speed of the door is controlled by controlling each of the doors. 6. The method according to any one of claims 1 to 5, Wherein the controller controls the main electromagnet portion and the door electromagnet portion so that a suction force acts on the main electromagnet portion and the door electromagnet portion for a predetermined time after the door switch is closed by the door switch, Refrigerator. The method according to claim 6, Wherein when the door movement speed of the door by the speed sensing unit exceeds a predetermined value when the door is closed, a repulsive force acts between the main body electromagnetic portion and the door electromagnetic portion, Wherein the closing speed of the door is controlled by controlling each of the doors and the doors. 10. The method of claim 9, Wherein the main body electromagnetic portion and the door electromagnet portion are each composed of a plurality of members, and when the moving speed of the door when the door is closed exceeds a predetermined value, Wherein the controller controls to operate in a direction in which the moving speed when the door is closed is reduced. 8. The method of claim 7, Wherein the main body electromagnetic portion and the door electromagnet portion are each composed of a plurality of members, and when the moving speed of the door when the door is opened exceeds a predetermined value, Wherein the controller controls to operate in a direction in which the moving speed when the door is opened is reduced.

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