JP2019049373A - refrigerator - Google Patents

Abstract

To provide a refrigerator which enables improvement of convenience.SOLUTION: A refrigerator 1 includes: a body part 2 having a storage part 3 in which an opening surface 3a is opened on a front surface; a first door 93 which is pivotably supported by one end parts at left and right sides of the body part 2 and opens or closes the opening surface 3a; a second door 94 which is pivotally supported by the other end parts at the left and right sides of the body part 2, opens or closes the opening surface 3a, and has a breadth wider than the first door 93; and a door opening device 50 which opens the first door 93 and the second door 94 by driving of a driving motor 52. The door opening device 50 has: a first operation switch 19a which instructs opening of the first door 93; and a second operation switch 19b which instructs opening of the second door 94. The second door 94 is opened first when the first operation switch 19a and the second operation switch 19b are simultaneously operated.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a refrigerator provided with a door opening device that opens a door.

  A conventional refrigerator provided with a door opening device is disclosed in Patent Document 1. In this refrigerator, a first door and a second door are provided side by side on the front of a storage room provided in the main body. The first door and the second door are respectively pivotally supported by vertical pivots disposed on both sides of the main body, and open and close the front opening of the storage room.

  A door opening device driven by a drive motor is provided on the upper surface of the main body. The door opening device has a main cam rotated by a drive motor, and a pair of first and second sub cams sliding on the main cam. The first sub cam and the second sub cam are disposed to face the first door and the second door, respectively.

  In the refrigerator having the above configuration, when the door opening device receives an instruction to open the first door, the drive motor rotates in one direction, the main cam slides on the first sub cam, and the first door is opened. When the door opening device receives an instruction to open the second door, the drive motor rotates in the reverse direction, and the main cam slides on the second sub cam to open the second door. The cost of the refrigerator can be reduced because the first and second doors can be opened by driving the same drive motor.

JP-A-2006-132919 (pages 4 to 6, FIG. 2)

  However, according to the conventional refrigerator, when the user opens both the first door and the second door, an instruction to open the first door and an instruction to open the second door may be performed substantially simultaneously. At this time, after one of the first door and the second door is opened by the drive motor, the drive motor is reversed to delay the predetermined time, and the other is opened. For this reason, there existed a possibility that the other may collide with the user who one side of a 1st door and a 2nd door opened and approached a refrigerator. In addition, when the instruction to open the first door and the instruction to open the second door are performed substantially simultaneously, the order in which the doors are opened is not clear, and there is a problem that the convenience of the refrigerator is poor.

  An object of the present invention is to provide a refrigerator that can improve safety and convenience.

  In order to achieve the above object, the present invention comprises: a main body having a storage chamber having an opening on its front surface; and a first door pivotally supported at one left and right ends of the main body to open and close the opening. A second door which is pivotally supported at the left and right other end portions of the main body to open and close the opening surface and which is wider than the first door, the first door and the second door are driven by a drive motor. In a refrigerator having a door opening device for opening, the door opening device has a first operation switch for instructing the opening of the first door and a second operation switch for instructing the opening of the second door, When the 1 operation switch and the second operation switch are simultaneously operated, the second door is opened first.

  Further, according to the present invention, in the refrigerator having the above configuration, a first packing disposed between the main body and the first door, and a second packing disposed between the main body and the second door A third packing disposed between the first door and the second door, and a temperature sensor for detecting an outside air temperature, and the outside of the drive motor is set to a predetermined temperature when the outside air temperature is lower than a predetermined temperature It is characterized in that it is driven by one driving force, and when it is high, the driving motor is driven by a second driving force larger than the first driving force.

  Further, according to the present invention, when the first operation switch or the second operation switch is operated before a predetermined time elapses after the first door or the second door is closed, or the first door or the second door is operated. When the first operation switch or the second operation switch is operated in the open state, the drive motor is driven by the first driving force regardless of the outside air temperature.

  In the refrigerator according to the present invention, the drive voltage of the drive motor of the second drive force is larger than the drive voltage of the drive motor of the first drive force.

  Further, according to the present invention, in the refrigerator having the above configuration, a determination unit that determines whether or not the drive of the drive motor is continuously performed within a predetermined release time, and the drive of the drive motor is continuous within the release time. And a counter which is reset when it does not continue within the release time, and the drive motor is stopped for a predetermined stop time when the counter reaches a predetermined value. .

  In the refrigerator according to the present invention, the counter is reset after the stop time has elapsed.

  Further, the present invention is characterized in that, in the refrigerator having the above-mentioned configuration, the release time is lengthened in accordance with the increase of the counter.

  In the refrigerator according to the present invention, the first door and the second door can be closed by driving the drive motor, and the determination unit closes the first door or the second door. It is characterized in that the determination is made including the drive of the drive motor.

  Further, according to the present invention, in the refrigerator having the above-described configuration, a main body having a storage chamber having an opening in the front, a door for opening and closing the opening, and packing disposed between the main and the door. A refrigerator having a temperature sensor for detecting an outside air temperature and a door opening device for opening the door by driving the drive motor, wherein the driving motor is driven by a predetermined first driving force when the outside air temperature is lower than a predetermined temperature And driving the drive motor with a second drive force larger than the first drive force when the drive motor is high.

  According to the present invention, when the first operation switch and the second operation switch are simultaneously operated, the wide second door is opened first. For this reason, even if a user approaches a refrigerator by opening of the 2nd door, since the width of the 1st door opened with a delay is narrow, a collision with the 1st door and a user can be avoided. Therefore, the safety of the refrigerator can be improved. In addition, since the second door is opened first when the instruction to open the first door and the instruction to open the second door are simultaneously performed, the user can prepare for the opening operation of the door, and the refrigerator Convenience can be improved.

Front view showing a refrigerator according to a first embodiment of the present invention Front view showing a main body of a refrigerator according to a first embodiment of the present invention The top view which expanded the butt | matching part of the door of the refrigerator compartment of the refrigerator of 1st Embodiment of this invention Side surface sectional view showing the principal part of the refrigerator of a first embodiment of the present invention Front view showing an angle of a refrigerator of a first embodiment of the present invention The top view which shows the uneven part of the refrigerator of 1st Embodiment of this invention Top view for explaining the opening operation of the door opening and closing apparatus of the refrigerator according to the first embodiment of the present invention Top view for explaining the opening operation of the door opening and closing apparatus of the refrigerator according to the first embodiment of the present invention Top view for explaining the opening operation of the door opening and closing apparatus of the refrigerator according to the first embodiment of the present invention Top view for explaining the opening operation of the door opening and closing apparatus of the refrigerator according to the first embodiment of the present invention Top view for explaining the opening operation of the door opening and closing apparatus of the refrigerator according to the first embodiment of the present invention Top view for explaining the opening operation of the door opening and closing apparatus of the refrigerator according to the first embodiment of the present invention Top view for explaining the opening operation of the door opening and closing apparatus of the refrigerator according to the first embodiment of the present invention Flowchart for explaining the opening operation of the door opening and closing device of the refrigerator according to the first embodiment of the present invention The flowchart which explains the torque setting of the door opening and closing device of the refrigerator of 1st execution form of this invention Front view showing a refrigerator according to a second embodiment of the present invention Top view showing a refrigerator according to a second embodiment of the present invention Flowchart for explaining the opening operation of the refrigerator according to the third embodiment of the present invention Flow chart for explaining the stop state determination of the opening operation of the refrigerator according to the third embodiment of the present invention Flowchart for explaining continuous drive determination of the opening operation of the refrigerator according to the third embodiment of the present invention

First Embodiment
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a front view of the refrigerator of the first embodiment. The refrigerator 1 is provided with a main body portion 2 made of a heat insulating box filled with a foam heat insulating material (not shown) such as urethane foam between an inner case 2a and an outer case 2b (see FIG. 2). A temperature sensor 99 for detecting an outside air temperature is provided on the upper surface of the main body 2.

  A refrigerator compartment 3 is disposed in the upper part of the main body part 2, and below the refrigerator compartment 3, an ice making chamber 5 and a freezer compartment 6 are arranged side by side. A freezing room 7 is disposed below the ice making room 5 and the freezing room 6, and a vegetable room 8 is disposed below the freezing room 7. The ice making chamber 5, the freezing chamber 6 and the freezing chamber 7 form a freezing space communicated with each other at the rear of the main body 2.

  The front of the refrigerator compartment 3 is opened and closed by a pivotable left door 93 (first door) and a right door 94 (second door). The left door 93 and the right door 94 are respectively pivoted by vertical pivots 93 c and pivots 94 c provided at the left and right ends of the main body 2. The left door 93 and the right door 94 are filled with a foamed heat insulating material (not shown), and the right door 94 is formed wider than the left door 93.

  An operation unit 19 is provided on the front of the left door 93 and on the front of the right door 94. The operation unit 19 includes an operation switch 19a, an operation switch 19b, and a notification unit 19c. The operation switch 19 a is disposed on the front surface of the left door 93, and the operation switch 19 b and the notification unit 19 c are disposed on the front surface of the right door 94. The operation switch 19a (first operation switch) instructs the opening of the left door 93, and the operation switch 19b (second operation switch) instructs the opening of the right door 94. The notification unit 19c performs notification by voice or display.

  The operation switches 19a and 19b are turned on when pressed or touched by a finger, and when the finger is released and turned off, a signal of an open instruction is issued to a door opening / closing device 50 (see FIG. 7) described later. It is output. When the left door 93 is open, the operation of the operation switch 19a is not accepted, and when the right door 94 is opened, the operation of the operation switch 19b is not accepted.

  The front of the ice making chamber 5 is opened and closed by a door 95 sliding integrally with the ice storage case (not shown). The front of the freezer compartment 6 is opened and closed by a door 96 which slides integrally with a storage case (not shown). The front of the freezer compartment 7 is opened and closed by a door 97 sliding integrally with a storage case 7c (not shown). The front of the vegetable compartment 8 is opened and closed by a door 98 sliding integrally with a storage case (not shown). The doors 95 to 98 are filled with foam insulation (not shown).

  In the following description, when the refrigerator 1 is viewed from the front, the horizontal direction may be referred to as the X direction, the depth direction may be referred to as the Y direction, and the vertical direction may be referred to as the Z direction.

  FIG. 2 shows a front view of the main body 2. The refrigerator compartment 3 and the freezing space are partitioned by a heat insulating wall 9 filled with a foamed heat insulating material (not shown). The frozen space and the vegetable compartment 8 are separated by a heat insulating wall 10 filled with a foamed heat insulating material (not shown). The ice making chamber 5 and the freezing chamber 6 are horizontally provided at the front of the main body 2 and separated from the freezing chamber 7 by a partition 12 filled with a foamed heat insulating material (not shown). The ice making chamber 5 and the freezing chamber 6 are separated by a dividing wall 13 provided upright on the dividing portion 12.

  A plurality of cold air discharge ports 3b are opened on the back surface of the refrigerator compartment 3, and a cold air discharge port 7a and a return port 7b are opened on the back surface of the freezer compartment 7. Behind the freezing chamber 7, a cold air passage (not shown) in which a cooler (not shown) constituting a refrigerating cycle is disposed is provided. Cold air generated by a cooler (not shown) is discharged from the discharge port 3b and the discharge port 7a to the refrigerator compartment 3 and the freezer compartment 7 by a blower (not shown).

  The cold air discharged into the freezing chamber 7 flows through the freezing space and returns to the cooler (not shown) through the return port 7b. The cold air discharged into the refrigerator compartment 3 flows through the inside of the refrigerator compartment 3 and then flows into the vegetable compartment 8 through a communication passage (not shown). The cold air having flowed into the vegetable compartment 8 circulates in the vegetable compartment 8 and then returns to a cooler (not shown) via a return port (not shown).

  The left door 93 and the right door 94 have an annular packing 83 (first packing) and a packing 84 (second packing) in contact with the front surface of the peripheral wall of the refrigerator compartment 3 when closed. Similarly, the door 95 has an annular packing 85 on the back surface that contacts the front surface of the peripheral wall of the ice making chamber 5 when the door 95 is closed. The door 96 has an annular packing 86 on its back surface which comes in contact with the front surface of the peripheral wall of the freezing chamber 6 when it is closed. The door 97 has an annular packing 87 on its back surface which comes in contact with the front surface of the peripheral wall of the freezer compartment 7 when it is closed. The door 98 has an annular packing 88 on the back that contacts the front of the peripheral wall of the vegetable compartment 8 when closed. Each packing 83 to 88 is provided with a magnet (not shown) that is attracted to the front surface of the main body 2.

  FIG. 3 shows an enlarged view of the butted portions of the left door 93 and the right door 94. As shown in FIG. A packing 81 (third packing) and a packing 82 (third packing) are provided on the mutually facing side surfaces of the left door 93 and the right door 94, the longitudinal direction of which is arranged in the vertical direction (Z direction). The packing 81 has a magnet 81a, and the packing 82 has a magnet 82a. Thereby, when the left door 93 and the right door 94 are closed, the packing 81 and the packing 82 adsorb and the refrigerating chamber 3 is sealed. Alternatively, one of the magnet 81a and the magnet 82a may be formed of a magnetic material such as an iron plate.

  FIG. 4 is a side sectional view showing the details of the lower part of the refrigerator compartment 3. The right door 94 of the refrigerator compartment 3 is supported at its upper and lower ends by hinge pins 21 forming a pivot shaft 94c (see FIG. 1). An angle 11 for holding the hinge pin 21 is attached to the front of the heat insulating wall 9 between the cold storage room 3 and the freezing room 6. In addition, although the following description demonstrates the right door 94 of the refrigerator compartment 3, about the left door 93 of the refrigerator compartment 3, it becomes the same structure which turned right and left.

  FIG. 5 shows a front view of the angle 11. The angle 11 is formed by bending a metal plate into an L-shaped cross section, and the vertical portion 11 v is attached to the heat insulating wall 9 by a screw 16. A hinge pin 21 protrudes from one end of the horizontal portion 11 h of the angle 11. An annular asperity portion 22 having a plurality of inclined surfaces is formed on the seat surface of the hinge pin 21.

  A bearing portion 14 fitted to the hinge pin 21 is attached to the lower surface of the right door 94. A follower (not shown) sliding on the uneven portion 22 is provided on the lower surface of the bearing portion 14 so as to protrude downward.

  FIG. 6 shows a top view of the uneven portion 22. As shown in FIG. The concavo-convex portion 22 is formed point-symmetrically and has a pair of inclined surfaces 22a which descend in a clockwise direction in FIG. 6 and a pair of inclined surfaces 22c which rise in a clockwise direction. A horizontal surface 22d is provided between the upper end of the inclined surface 22a and the upper end of the inclined surface 22c, and a horizontal surface 22e is provided between the lower end of the inclined surface 22a and the lower end of the inclined surface 22c.

  The follower projecting from the lower end face of the bearing portion 14 has an inclined surface which makes surface contact with the inclined surface 22a and the inclined surface 22c of the uneven portion 22, respectively. When the right door 94 rotates, the top of the follower slides on the uneven portion 22 and moves up and down.

  When the follower is disposed on the inclined surface 22a, the right door 94 is biased in the closing direction by its own weight. On the other hand, when the follower is disposed on the inclined surface 22c, the right door 94 is biased in the direction of opening by its own weight. The left door 93 is also configured in the same manner, and is biased by the uneven portion 22 by its own weight.

  FIG. 7 shows a top view of the refrigerator 1. A support member 51 extending above the left door 93 and the right door 94 is attached to the upper surface of the main body 2, and a door opening / closing device 50 (door opening device) is installed on the support member 51. The door opening and closing device 50 includes a slider 59, a drive unit 58 for driving the slider 59, and a guide unit 60 for slidingly guiding the slider 59. Further, the door opening / closing device 50 is provided with a detection sensor (not shown) for detecting the opening amount of the left door 93 and the right door 94.

  The drive unit 58 includes a drive motor 52, a worm 53, a worm wheel 57, a reduction gear 54, a reduction gear 55, and a reduction gear 56. Two reduction gears 54, two reduction gears 55 and two reduction gears 56 are provided. The worm 53 is attached to the shaft of the drive motor 52 and meshes with the worm wheel 57. The worm wheel 57 meshes with the two reduction gears 54. The reduction gear 55 is mounted concentrically with the reduction gear 54. The reduction gear 56 meshes with the reduction gear 55. A slider 59 is provided on the lower surface of the reduction gear 56. Thereby, the slider 59 is rotated by the drive of the drive motor 52.

  The guide portion 60 is provided on the upper surface of the left door 93 and the right door 94, and includes a rib 73 and a rib 74 protruding upward. The rib 73 has a cam surface 73a, and the rib 74 has a cam surface 74a. In the closed state of the right door 94 shown in FIG. 7, the cam surface 73 a of the guide portion 60 on the right approaches the body shaft 2 as it approaches the pivot shaft 94 c as it gets closer to the main body 2 Incline. Also, as the cam surface 74 a approaches the main body 2, it inclines away from the pivot shaft 94 c.

  That is, the inclination of the cam surface 74a and the cam surface 73a with respect to the Y direction is opposite. Further, the cam surface 74a and the cam surface 73a are both disposed on one side (in the present embodiment, on the side of the pivot shaft 94c) with respect to the center line CL of the reduction gear 56 in the Y direction. Is also disposed closer to the main body 2.

  Similarly, in the closed state of the left door 93 shown in FIG. 7, the cam surface 73 a of the guide portion 60 on the left approaches the pivot shaft 93 c as it approaches the main body portion 2 and is further inward than the orbiting circle of the slider 59. Tilt to get in. Also, as the cam surface 74 a approaches the main body 2, the cam surface 74 a inclines away from the pivot shaft 93 c.

  When the right door 94 is in the closed state and in the drive standby state, the slider 59 is disposed at a retracted position which does not interfere with the guide portion 60 even if the right door 94 is manually opened and closed. That is, at the retracted position, the slider 59 is disposed on the center line CL, and is disposed on the outer peripheral side of the locus of the cam surfaces 73a and 74a due to the opening and closing of the right door 94.

  When the operation switch 19b is operated in the closed state of the right door 94, the drive unit 58 opens the right door 94. By the opening drive, as shown in FIG. 8, the reduction gear 56 rotates counterclockwise CCW in the figure as shown in FIG. 8, and the slider 59 approaches the pivot shaft 94c in the X direction with movement in the Y direction ( Move to the right). As a result, the slider 59 slides on the cam surface 73 a of the rib 73.

  When the right door 94 moves in the opening direction by sliding between the slider 59 and the cam surface 73a, the follower lifts the inclined surface 22a against the biasing force of the right door 94 due to its own weight, and the right door 94 rises. It is opened while. When the right door 94 is opened by a predetermined amount, the slider 59 reaches the end (rear end) of the cam surface 73a, and the opening operation is ended.

  When the opening drive by the drive unit 58 is finished, the follower slides on the inclined surface 22c, the right door 94 is biased by its own weight, and the right door 94 is opened. Thereby, as shown in FIG. 9, the slider 59 is disposed at a position away from the cam surface 63a. Thereafter, when the follower is disposed on the horizontal surface 22e, the right door 94 is fully opened, and the right door 94 can be easily opened manually. When the door opening drive by the drive unit 58 is finished, the drive motor 52 is reversely driven to move the slider 59 to the retracted position as shown in FIG. 7 described above, and the drive motor 52 is stopped.

  Next, when the right door 94 is manually closed from the opened state of the right door 94, the follower slides on the inclined surface 22c, and the right door 94 ascends. When the detection sensor detects that the right door 94 is closed to a predetermined position, the drive unit 58 drives the right door 94 to close.

  By the closing drive, as shown in FIG. 10, the reduction gear 56 rotates counterclockwise CCW in the figure as shown in FIG. 10, and the slider 59 at the retracted position approaches the pivot shaft 94c in the X direction (rightward in the figure). Moving. As a result, the slider 59 slides on the cam surface 74 a of the rib 74 and the right door 94 is closed.

  As shown in FIG. 11, when the right door 94 is closed by a predetermined amount, the slider 59 reaches the end (front end) of the cam surface 74a. At this time, the follower is disposed on the inclined surface 22a (see FIG. 6) and the right door 94 is urged in the closing direction, and the slider 59 is separated from the cam surface 74a. Then, as shown in FIG. 12, the slider 59 abuts on the cam surface 73a, and the sliding surface of the slider 59 is switched from the cam surface 74a to the cam surface 73a.

  At this time, the slider 59 is pressed against the cam surface 73 a by the weight of the right door 94 and supports the right door 94 against the biasing force of the weight. Then, as the slider 59 is inverted and rotates clockwise in the drawing, the follower descends on the inclined surface 22a (see FIG. 6) and is guided in the direction in which the right door 94 is closed. Thereby, the right door 94 is closed as shown in FIG. Thereafter, the slider 59 is disposed at the retracted position shown in FIG. 7 described above.

  The left reduction gear 56 rotates when the right door 94 is driven to open and close, but the slider 59 on the left rotates at a position away from the rib 73 and the closed state of the left door 93 is maintained. Be done.

  On the other hand, similarly to the right door 94, when the operation switch 19a is operated in the closed state of the left door 93, the left door 93 is opened by the drive unit 58. By the opening drive, the reduction gear 56 is rotated clockwise CW in FIG. 7 and the left door 93 is opened. On the other hand, when the left door 93 is closed by a predetermined amount, the reduction gear 56 is rotated clockwise CW in the figure by the closing drive, and the left door 93 is closed.

  FIG. 14 is a flowchart showing a detailed operation when the left door 93 and the right door 94 are opened by the door opening and closing device 50. When at least one of the operation switch 19a and the operation switch 19b is pressed or touched to be turned on, the operation of FIG. 14 is started.

  At step # 13, it is determined whether the other of the operation switches 19a and 19b is in the on state. When the other of the operation switches 19a and 19b is in the off state, the process proceeds to step # 14, and it is determined whether or not one of the operation switches 19a and 19b is in the off state. If one of the operation switches 19a and 19b is in the on state, the process returns to step # 13, and steps # 13 and # 14 are repeated.

  If one of the operation switch 19a and the operation switch 19b is turned off before the other is turned on, the process proceeds to step # 21. At step # 21, torque setting processing for setting the torque of the drive motor 52 is performed.

  FIG. 15 is a flowchart showing the operation of the torque setting process. At step # 61, it is judged if a predetermined time has elapsed since the left door 93 or the right door 94 was closed last time. If the predetermined time has elapsed, the process proceeds to step # 62. If the predetermined time has not elapsed, the process proceeds to step # 64.

  In step # 62, it is determined whether the left door 63 or the right door 64 corresponding to the other of the operation switches 19a and 19b is in the open state. When the left door 63 or the right door 64 corresponding to the other of the operation switches 19a and 19b is closed, the process proceeds to step # 63, and when the left door 63 or the right door 64 is open, the process proceeds to step # 64.

  At step # 63, it is determined whether the outside air temperature detected by the temperature sensor 99 is higher than a predetermined temperature. If the outside air temperature is lower than the predetermined temperature, the process proceeds to step # 64, and if it is higher, the process proceeds to step # 65.

  At step # 64, the torque of the drive motor 52 is set to a predetermined first torque (first drive force), and the process returns to the process of FIG. At step # 65, the torque of the drive motor 52 is set to a second torque (second drive force) larger than the first torque, and the process returns to the process of FIG. The second torque is set by increasing the drive voltage by the increase of the duty ratio than the first torque.

  When the outside temperature is high, the packings 81 to 84 are softened, so the adhesion of the packings 81 to 84 is increased. Further, the left door 93 and the right door 94 expand due to the outside air temperature, and the frictional force between the packing 81 and the packing 82 becomes large.

  Therefore, when the outside temperature is high, the drive motor 52 can be driven with a high second torque, and the left door 93 and the right door 94 can be reliably opened. Further, when the outside temperature is low, the drive motor 52 is driven with the low first torque to save power, and a collision with the user due to the sudden opening of the left door 93 and the right door 94 can be avoided.

  At this time, when the elapsed time from the previous closing of the left door 93 or the right door 94 is short, the adhesive force of the packings 81 to 84 is not increased. For this reason, it transfers to step # 64 by judgment of step # 61, and is set to 1st torque.

  Further, in a state where the left door 63 or the right door 64 corresponding to the other of the operation switches 19a, 19b is opened, the packings 83, 84 between the left door 63 and the right door 64 do not adhere. For this reason, it transfers to step # 64 by judgment of step # 62, and is set to 1st torque. It is also possible to shift to step # 65 and set the second torque only with at least one determination of the determination of step # 61 and the determination of step # 62.

  At step # 22 in FIG. 14, the drive motor 62 is driven by the torque set in the torque setting process, the left door 63 or the right door 64 corresponding to one of the operation switches 19a, 19b is opened, and the process is ended.

  If it is determined in step # 13 that one of the operation switches 19a and 19b is turned off before the other is turned on, the process proceeds to step # 15. At this time, both of the operation switches 19a and 19b are pressed or touched. At step # 15, the operation waits until one of the operation switches 19a and 19b is turned off. When one of the operation switches 19a and 19b is turned off, the process proceeds to step # 16 to start the timer.

  At step # 17, it is determined whether or not both of the operation switches 19a and 19b have been turned off. If the operation switch 19a or the operation switch 19b is in the on state, the process proceeds to step # 18. At step # 18, it is determined whether or not 0.2 seconds have elapsed from the timer. If the timer does not count 0.2 seconds, the process returns to step # 17, and steps # 17 and # 18 are repeated.

  If it is determined in step # 17 that both of the operation switches 19a and 19b are turned off before 0.2 seconds elapse, it is determined that the operation switches 19a and 19b are simultaneously operated, and the process proceeds to step # 31. That is, when the difference between the timing when each of the operation switches 19a and 19b is turned off from the on state of both the operation switches 19a and 19b is within 0.2 seconds, it is determined that the operation is simultaneously performed. The time for judging simultaneous operation may be set to other than 0.2 seconds.

  When one of the operation switch 19a or the operation switch 19b is maintained in the on state and 0.2 seconds have elapsed, it is determined that the simultaneous operation is not performed, and the process proceeds to step # 25.

  At step # 25, the torque setting process of FIG. 15 described above is performed. In step # 26, the drive motor 52 is driven with the torque set in the torque setting process, and the left door 93 or the right door 94 corresponding to the operation switch 19a or the operation switch 19b determined to be off in step # 15. Is opened.

  At step # 28, the operation waits until the finger is separated from the on-state operation switch 19a or 19b and both of the operation switches 19a and 19b are turned off. When both of the operation switches 19a and 19b are turned off, the process proceeds to step # 29. In step # 29, the left door 93 or the right door 94 corresponding to the operation switch 19a or the operation switch 19b that has been turned off later is opened, and the process is ended. At this time, since the left door 93 or the right door 94 has already been opened at step # 26, the drive motor 52 is driven with the first torque.

  If it is determined in step # 17 that the operation switches 19a and 19b are simultaneously operated and the process proceeds to step # 31, the torque setting process of FIG. 15 described above is performed. At step # 32, the drive motor 52 is driven with the torque set in the torque setting process, and the right door 94 is opened. At step # 34, the left door 93 is opened, and the process is ended. At this time, since the right door 94 has already been opened in step # 32, the drive motor 52 is driven with the first torque.

  The width of the left door 93 that is opened later is smaller than the width of the right door 94 that is opened earlier, so the amount of protrusion of the left door 93 to the front (toward the user) is smaller than that of the right door 94 Become. Therefore, even if the user approaches the refrigerator 1 due to the opening of the right door 94, it is possible to avoid the collision between the user and the left door 93 opened later.

  According to the present embodiment, when the operation switch 19a (first operation switch) and the operation switch 19b (second operation switch) are simultaneously operated, the wide right door 94 (second door) is opened first. For this reason, even if the user approaches the refrigerator 1 due to the opening of the right door 94, since the width of the left door 93 opened in a delayed manner is narrow, the collision between the left door 93 and the user can be avoided. In addition, when it is determined that the operation switch 19a and the operation switch 19b are simultaneously operated, the right door 94 (second door) is opened first, so the door opening operation when the user simultaneously operates is performed. Understand and prevent unexpected behavior. Therefore, the safety and convenience of the refrigerator 1 can be improved.

  In addition, when the outside air temperature is lower than a predetermined temperature, the drive motor 52 is driven with a predetermined first torque (first drive force), and when it is high, the second torque (second torque) larger than the first torque (second Drive force). Thereby, the left door 93 and the right door 94 can be reliably opened when the outside temperature is high. In addition, power saving can be achieved when the outside air temperature is low, and collision with the user due to rapid opening of the left door 93 and the right door 94 can be avoided.

  In addition, when the operation switch 19a or the operation switch 19b is operated before the predetermined time elapses after the left door 93 or the right door 94 is closed, the drive motor 52 is driven by the first driving force regardless of the outside air temperature. Thus, the drive motor 52 is driven by the first torque in a period in which the adhesive strength of the packings 81 to 83 is not increased, power saving is realized, and the user by the rapid opening of the left door 93 or the right door 94 Collisions can be avoided.

  In addition, when the operation switch 19a or the operation switch 19b is operated in a state where the left door 93 or the right door 94 is opened, the drive motor 52 is driven by the first driving force regardless of the outside air temperature. When the left door 63 or the right door 64 is open, the packings 83 and 84 do not stick. Therefore, it is possible to drive the drive motor 52 by the first torque to save power and to avoid a collision with the user due to the sudden opening of the left door 93 or the right door 94.

  Further, it is possible to easily realize the first torque and the second torque which differ in magnitude depending on the drive voltage of the drive motor 52.

Second Embodiment
Next, FIG. 16 shows a front view of the refrigerator 1 of the second embodiment. For convenience of explanation, the same parts as those of the first embodiment shown in FIGS. 1 to 15 described above are given the same reference numerals. In the present embodiment, the refrigerator compartment 3 is opened and closed by a single door 92. The other parts are the same as in the first embodiment.

  The opening surface 3a of the front of the refrigerator compartment 3 is opened and closed only by the door 92 pivotally supported by the pivot shaft 92c perpendicular to the main body 2. The pivot shaft 92c is formed by hinge pins 21 (see FIG. 4) that respectively support the upper and lower ends of the door 92.

  A packing (not shown) for preventing cold air leakage is provided on the periphery of the door 92 facing the main body 2. The packing is provided with a magnet (not shown) that is attracted to the front of the main body 2. An operation unit 19 is provided on the front of the door 92. The operation unit 19 is provided with an operation switch 19a and a notification unit 19c.

  FIG. 17 shows a top view of the refrigerator 1. A support member 51 extending above the door 92 is attached to the upper surface of the main body 2, and a door opening / closing device 50 is installed on the support member 51. Unlike the first embodiment, the door opening and closing device 50 does not have the reduction gear 54, and the reduction gear 55 is provided concentrically with the worm wheel 57. Others are the same as in the first embodiment.

  When a predetermined operation is performed by the operation switch 19a (see FIG. 16) in the closed state of the door 92, the drive portion 58 opens and drives the door 92. At this time, as in the first embodiment, the drive motor 52 is driven by the first torque when the outside air temperature is lower than a predetermined temperature. Further, when the outside air temperature is higher than a predetermined temperature, the drive motor 52 is driven with a second torque larger than the first torque.

  On the other hand, when the door 92 is manually closed to a predetermined position from the open state of the door 92, the drive portion 58 drives the door 92 to close.

  According to the present embodiment, as in the first embodiment, when the outside air temperature is lower than the predetermined temperature, the drive motor 52 is driven with a predetermined first torque (first drive force), and when the outside temperature is high, the drive motor 52 is It drives with the 2nd torque (2nd driving force) larger than the 1st torque. Thus, the door 92 can be reliably opened even if the packing is softened when the outside air temperature is high. In addition, power saving can be achieved when the outside air temperature is low, and collision with the user due to the rapid opening of the door 92 can be avoided.

  In the present embodiment, the guide portion 60 may be provided with a cam surface 63a (shown by an alternate long and short dash line in FIG. 17) symmetrical to the cam surface 73a with respect to the Y-direction center line CL of the reduction gear 56. Thus, the door 92 can be opened by sliding the slider 59 on the cam surface 63a at the time of the opening operation.

Third Embodiment
FIG. 18 shows a flow chart for explaining the opening operation of the refrigerator 1 of the third embodiment. This embodiment is partially different from the closing operation of the first embodiment shown in FIG. 14 described above, and stops the driving of the driving motor 52 when the driving motor 52 is continuously driven a predetermined number of times. The other parts are the same as in the first embodiment.

  Hereinafter, parts different from the flowchart shown in FIG. 14 will be described. At step # 11, a stop state determination process for determining whether or not the drive motor 52 is at a stop state is called.

  FIG. 19 is a flowchart showing the operation of the stop state determination process. At step # 41, it is determined whether a counter i for counting the number of times of continuous drive of the drive motor 52 is equal to or greater than a predetermined value (here, 80) smaller than an upper limit described later. When the outside air temperature is low, the predetermined value may be greater than 80. The counter i is increased by a continuous drive determination process described later. If the counter i is less than 80, the process proceeds to step # 47. If the counter i is 80 or more, the process proceeds to step # 42.

  In step # 42, it is determined whether the counter i is equal to or greater than a predetermined upper limit (here, 100). If the counter i is less than 100, the process proceeds to step # 43. If the counter i is 100 or more, the process proceeds to step # 44. The upper limit value may be made larger than 100 when the outside air temperature is low.

  In step # 43, the notification unit 19c notifies that the number of times of continuous driving of the drive motor 52 has approached the upper limit value, and the process proceeds to step # 47.

  In step # 44, the door 4 is in the drive stop state, and the operation unit 19 notifies that the reception can not be performed.

  At step # 45, it is determined whether or not a predetermined stop time (for example, 3000 sec) has elapsed since the counter i reached the upper limit value. If the stop time has not elapsed, the process proceeds to step # 48, and it is determined that the drive motor 52 is in the drive stop state, and the process returns to step # 12 in FIG. If the stop time has elapsed, the process proceeds to step # 46, where the counter i is reset (i = 0 since the drive motor 52 is driven).

  At step # 47, it is determined that the drive motor 52 can be driven, and the process returns to step # 12 of FIG.

  In step # 12 of FIG. 18, whether the drive motor 52 is in the drive stop state or not is determined based on the return value of the stop state determination process. In the case of the drive stop state, the processing is ended. Thereby, the left door 93 and the right door 94 are opened and closed only manually. In the case of the drivable state, the process proceeds to step # 13, and steps # 13 to # 26 and steps # 31 and # 32 are performed as in the first embodiment.

  When the drive motor 52 is driven in step # 26, the continuous drive determination process is called in step # 27. When the drive motor 52 is driven in step # 32, the continuous drive determination process is called in step # 33. When the drive motor 52 is driven in steps # 22, # 29, and # 34, the continuous drive determination process is called in step # 35.

  FIG. 20 is a flowchart showing the operation of the continuous drive determination process. The continuous drive determination process determines whether or not the drive of the drive motor 52 is continuously performed within a predetermined release time.

  At step # 51, a predetermined release time Ti is derived. The release time Ti is a function of the counter i and is 30 sec × i in this embodiment. As a result, the release time Ti is lengthened as the counter i increases.

  At step # 52, it is determined whether the elapsed time T since the drive motor 52 was driven last time is equal to or longer than the release time Ti. If the elapsed time T is equal to or longer than the release time Ti, it is determined that the drive motor 52 has sufficiently dissipated heat, and the process proceeds to step # 55 where the counter i is reset (i = 1 because the drive motor 52 is driven).

  If the elapsed time T is less than the release time Ti, the process proceeds to step # 53. At step # 53, it is determined whether the elapsed time T is equal to or longer than a predetermined hold time Tx. In the present embodiment, the hold time Tx is set to 30 seconds. If the elapsed time T is equal to or longer than the hold time Tx, it is determined that heat release has been performed by a predetermined amount, and the integration of a counter i described later is held, and the process returns to the process of FIG. If the elapsed time T is smaller than the hold time Tx, it is determined that the heat radiation is insufficient, and the process proceeds to step # 54.

  At step # 54, it is determined whether the right door 94 has been driven. When the left door 93 is driven, the process proceeds to step # 56, and when the right door 94 is driven, the process proceeds to step # 57. In step # 56, 1 is added to the counter i, and in step # 57, 2 is added to the counter i, and the process returns to FIG. The right door 94, which is wider than the left door 93, has a large load on the drive motor 52, and the value added to the counter i is increased.

  The counter i is integrated at steps # 56 and # 57, and when the counter i exceeds the upper limit value, the drive motor 52 is stopped by the stop state determination processing.

  According to this embodiment, the same effect as that of the first embodiment can be obtained. Further, it is determined by the continuous drive determination process (determination unit) whether or not the drive of the drive motor 52 is continuously performed within the release time Ti. Further, a counter i is provided which is integrated when the drive of the drive motor 52 continues within the release time Ti and is reset when the drive motor 52 does not continue within the release time Ti. Then, when the counter i reaches the upper limit value, the drive of the drive motor 52 is stopped for the stop time. Thereby, the abnormal heating of the drive motor 52 is suppressed, and the failure of the drive motor 52 can be reduced.

  In addition, when the drive of the drive motor 52 is not continuous within the release time Ti, the counter i is reset. Thereby, in general use, it is possible to prevent the drive motor 52 from being in the stop state when the counter i reaches the upper limit value.

  Further, since the release time Ti is lengthened along with the increase of the counter i, the heat accumulated in the drive motor 52 can be sufficiently dissipated by the continuous drive.

  In addition, when the counter i reaches a predetermined value (80 in the present embodiment), notification is performed. Thereby, the user can be easily notified that the drive motor 52 is in the heating state.

  The refrigerator 1 according to the second embodiment may be provided with the same stop state determination process and continuous drive determination process as the present embodiment, and the drive motor 52 may be stopped when the drive motor 52 is continuously driven a predetermined number of times. .

Fourth Embodiment
Next, a fourth embodiment of the present invention will be described. In the present embodiment, the hold time Tx of FIG. 20 of the third embodiment is varied according to the load of the drive motor 52. The other parts are the same as in the third embodiment.

  The load of the drive motor 52 is estimated from the drive time (time from start of drive to end) of the drive motor 52 at the time of opening or closing of the previous door, motor current at the time of drive, and the like. Then, when the load of the drive motor 52 is smaller than a predetermined value, the hold time Tx is set to a time shorter than 30 seconds.

  For example, the hold time Tx is set to 30 seconds if the previous drive time of the drive motor 52 is equal to or longer than a predetermined time, and the hold time Tx is set to 15 seconds shorter than 30 seconds if less than the predetermined time. Further, in the demonstration mode in which the demonstration is performed at the store, the storage room is not cooled because the storage chamber is not cooled, and a heavy load is not stored in the door pocket, so the load on the drive motor 52 is small. Therefore, in the demonstration mode, the hold time Tx is set to 5 seconds, which is shorter than 15 seconds.

  As a result, when the load at the time of driving the drive motor 52 is small and the heat generation of the drive motor 52 is small, it is not necessary to integrate the counter i if the hold time Tx for a short time elapses. In this way, it is possible to suppress transition of the drive motor 52 to the drive stop state due to integration of unnecessary counters in the demonstration mode or the like.

  In the first to fourth embodiments, the left door 93 and the right door 94 may be opened by driving the drive motor 52, and the left door 93 and the right door 94 may be closed manually. At this time, the counter i in the third embodiment and the fourth embodiment increases when the left door 93 or the right door 94 is opened.

  According to the present invention, it can be used for a refrigerator equipped with a door opening device that opens the door.

1 Refrigerator (door opening and closing mechanism)
2 body part 2a inner box 2b outer box 3 cold storage room 3a opening face 3b outlet 5 freezing room 7 vegetable room 7a
7b Discharge port 9 Heat insulation wall 11 Angle 11a, 11c Slope 11d Horizontal surface 12 Divider 13 Divider 14 Bearing 14a, 14c Slope 16 Screw 19 Operation 19a Operation switch (1st operation switch)
19b Operation switch (second operation switch)
19c informing part 21 hinge pin 22 uneven part 22a, 22b, 22c inclined surface 22d, 22e horizontal surface 50 door opening and closing device (door opening device)
Reference Signs List 51 support member 52 drive motor 53 worm 54, 55, 56 reduction gear 57 worm wheel 58 drive unit 59 slider 60 guide unit 73, 74 rib 63a, 73a, 74a cam surface 92, 95 to 98 door 81 to 88 packing 93 Left door (first door)
94 Right door (second door)
99 Temperature sensor CL center line

Claims (7)

  A main body having a storage chamber having an opening in the front, a first door pivotally supported at one end of the main body to open and close the opening, and a second door pivoting at the other end of the main A refrigerator comprising: a second door supported to open and close the opening surface and having a wider lateral width than the first door; and a door opening device for opening the first door and the second door by driving a drive motor. The door opening device has a first operation switch instructing the opening of the first door and a second operation switch instructing the opening of the second door, and the first operation switch and the second operation switch simultaneously When operated, the second door is opened first.   A first packing disposed between the main body and the first door, a second packing disposed between the main body and the second door, the first door, and the second door And a temperature sensor for detecting the outside air temperature, and driving the drive motor with a predetermined first driving force when the outside air temperature is lower than a predetermined temperature, The refrigerator according to claim 1, wherein the drive motor is driven by a second driving force larger than the first driving force.   When the first operation switch or the second operation switch is operated before a predetermined time elapses after the first door or the second door is closed, or the first door or the second door is opened The refrigerator according to claim 2, wherein when the first operation switch or the second operation switch is operated, the drive motor is driven by the first driving force regardless of the outside air temperature.   A determination unit that determines whether or not the drive of the drive motor has been continuously performed within a predetermined release time, and integration is performed when the drive of the drive motor continues within the release time within the release time The counter according to any one of claims 1 to 3, further comprising: a counter that is reset when not continuous, and stopping driving of the drive motor for a predetermined stop time when the counter reaches a predetermined value. Description refrigerator.   5. The refrigerator according to claim 4, wherein the release time is extended as the counter increases.   The first door and the second door can be closed by the drive of the drive motor, and the determination is performed including the drive of the drive motor when the first door or the second door is closed. The refrigerator according to claim 4 or 5, characterized in that   A main body having a storage chamber having an opening in the front, a door for opening and closing the opening, a packing disposed between the main body and the door, a temperature sensor for detecting an outside air temperature, In a refrigerator provided with a door opening device that opens a door by the drive of a drive motor, the drive motor is driven with a predetermined first drive force when the outside air temperature is lower than a predetermined temperature, and when it is higher, the drive motor is A refrigerator characterized in that it is driven by a second driving force larger than the first driving force.

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