JP4538030B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator provided with a door operation device that linearly moves a door of a storage room forward from a closed position that closes the front surface of the storage room.

There exists a thing of the structure which operates a door operating device based on the operation element being operated in the state in which the door is operated to the closed position in the said refrigerator. This door operation device uses an electromagnetic solenoid as a drive source. When the door operation device is activated, the electromagnetic solenoid plunger moves the door forward from the closed position based on electromagnetic force pressing the door from the back to the front. To do. Japanese Patent Application No. 2006-286370 describes background art.
JP 2006-308167 A

  In the case of the refrigerator described above, since the operation element is mounted on the door so as to be linearly movable in the same longitudinal direction as the door, when the user returns the door to the closed position, the operation element is accidentally pushed in. There is a risk of it. In this case, since it is detected that the operating element is operated at the same time when the door reaches the closed position, the user is shocked based on the operation of the door operating device at the moment when the door reaches the closed position. Power is added.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to prevent the door operating device from operating when the user erroneously operates the operator when returning the door to the closed position. It is to provide a refrigerator that can.

  The refrigerator according to claim 1, wherein the refrigerator has a space in which a front surface is open and is supplied with cold air, a closed position for closing the front surface of the storage chamber, and an open position for opening the front surface of the storage chamber It is possible to move linearly in the front-rear direction between a door provided so as to be linearly movable in the front-rear direction, and a predetermined non-operation position of the door and an operation position behind the non-operation position. An operating element provided; a door switch whose electrical state changes mutually depending on whether or not the door is in the closed position; and when the operating element is in the non-operating position and in the operating position. In some cases, an operator switch whose electrical state changes mutually, and the door is moved forward from the closed position based on the door being operated in the closed position. Electrical A door operating device having a driving source; and a control circuit for driving and controlling the driving source of the door operating device in accordance with respective electrical states of the door switch and the operator switch, and the control circuit includes the door switch. The closing time during which the door is held in the closed position is measured based on the return of the door to the closed position based on the electrical state of When it is determined that the operation element has been operated based on a certain state, a drive power source is supplied to the drive source of the door operation device on the condition that the measurement result of the closing time has reached a predetermined value. When the measurement result of the closing time does not reach a predetermined value, no drive power is applied to the drive source of the door operating device.

  When the user operates the operation element from the non-operation position to the rear operation position, the measurement result of the closing time is compared with a predetermined value, and the measurement result of the closing time has reached a predetermined value The door operation device is activated, and the door operation device is not activated when the measurement result of the closing time does not reach a predetermined value. The closing time is a time during which the door is held in the closed position, and is measured based on the door being returned to the closed position. That is, when the user returns the door to the closed position and erroneously pushes the operating element, it is detected that the operating element is operated to the operating position at the same time as the door reaches the closed position. In this case, since the measurement result of the closing time does not reach a predetermined value, the door operating device does not operate and it is possible to prevent the user from inadvertently applying an impact force.

[Example 1]
As shown in FIG. 1, the cabinet 1 includes an outer box 2, an inner box 3, and a heat insulating material 4. Each of the outer box 2 and the inner box 3 has a vertically long rectangular shape with an open front, and has a bottom plate, a left side plate, a right side plate, a top plate, and a rear plate. Each of the bottom plate to the rear plate of the outer box 2 is made of a steel plate, each of the bottom plate to the rear plate of the inner box 3 is made of a synthetic resin, and the inner box 3 is between the two bottom plates to both the rear plates. It is accommodated in the outer box 2 so that a space is formed between each other. As shown in FIG. 2, the bottom plate of the outer box 2 is bent at the bottom flange portion 5 that closes the gap between the two bottom plates from the front, and the left plate of the outer box 2 has a gap between the left and right plates. The left flange portion 6 that is closed from the front is bent, and the right flange portion 7 that closes the gap between the right side plates from the front is bent on the right side plate of the outer box 2. The top flange portion that closes the gap between them is bent, and the heat insulating material 4 is filled in each of the space portion between the two bottom plates to the space portion between the two rear plates.

  As shown in FIG. 1, a horizontal heat insulating partition wall 8 is fixed inside the cabinet 1. The heat insulating partition wall 8 is constructed by housing a solid heat insulating material such as polystyrene foam in a hollow case, and is located above the heat insulating partition wall 8 inside the cabinet 1 and is in a refrigerator compartment. 9 is formed. The refrigerating room 9 refers to a space part whose front surface is open. As shown in FIG. 2, the left door 10 and the right door 11 are mounted on the cabinet 1 in front of the refrigerating room 9. ing. The left door 10 is pivotable about a vertical axis 12 between a closed state in which the left half of the front side of the refrigerator compartment 9 is closed and an open state in which the left half is opened. Of the front face of the refrigerating chamber 9, a closed state in which the right half is closed and an open state in which the right half is opened are rotatable about a vertical shaft 13.

  Inside the cabinet 1, as shown in FIG. 1, a cold air duct 14 is fixed at a rear end portion in the refrigerator compartment 9. The cold air duct 14 extends in the vertical direction. The cold air duct 14 has a cold air inlet formed at the lower end portion and a cold air outlet 15 formed at the upper end portion. A fan device 16 is fixed inside the cold air duct 14. The fan device 16 is configured by connecting a fan to a rotating shaft of a fan motor. During operation of the fan motor, air in the refrigerator compartment 9 is sucked into the cold air duct 14 from the cold air inlet of the cold air duct 14. After rising along the inside of the cold air duct 14, the air is discharged from the cold air outlet 15 into the refrigerator compartment 9.

  As shown in FIG. 1, the cabinet 1 is formed with a machine room 17 located at the rear end. The machine room 17 is located at the lower end of the cabinet 1, and a compressor 18 of the refrigeration cycle is accommodated in the machine room 17. A refrigeration evaporator 19 is connected to the compressor 18, and refrigerant is sent from the compressor 18 to the refrigeration evaporator 19. The refrigeration evaporator 19 is housed in the cold air duct 14 of the cold room 9, and the cold air is circulated in the cold room 9 based on the cooling of the air passing through the cold air duct 14. The inside is controlled to a temperature range for refrigerated storage of food.

  As shown in FIG. 1, a freezer compartment 20 is formed inside the cabinet 1 below the heat insulating partition wall 8. The freezer compartment 20 refers to a space portion whose front surface is open, and a front plate 21 made of a steel plate is fixed to the cabinet 1 at the front end of the freezer compartment 20 as shown in FIG. . The front plate 21 has a vertical upper seat surface 22 extending in the left-right direction and a vertical lower seat surface 23 extending in the left-right direction, and the inside of the freezer compartment 20 is located below the front plate 21 as shown in FIG. The lower freezing chamber 24 is divided into an ice making chamber 25 on the upper left side of the front plate 21 and an upper freezing chamber 26 on the upper right side of the front plate 21. This lower freezer compartment 24 corresponds to a storage compartment.

  As shown in FIG. 3, a synthetic resin front frame 27 extending in the left-right direction is fixed to the rear surface of the front plate 21. The front frame 27 has a U-shaped cross section with an open front surface, and the front surface of the front frame 27 is closed from the front by a front plate 21. A horizontal plate-like rib 28 extending in the left-right direction is formed on the bottom plate of the front frame 27. A plurality of screws 29 are screwed onto the rib 28 from the front through the front plate 21, and the front frame 27 is joined to the front plate 21 with the fastening force of the plurality of screws 29.

  As shown in FIG. 2, a left slide door 30 is mounted on the cabinet 1 in front of the ice making chamber 25. The left sliding door 30 is linearly movable in the front-rear direction between a closed state in which the front surface of the ice making chamber 25 is closed and an open state in which the front surface of the ice making chamber 25 is opened. As shown in FIG. 1, an ice box 31 is supported. The ice box 31 is housed in the ice making chamber 25 with the left slide door 30 closed, and is drawn forward from the ice making chamber 25 with the left slide door 30 open. Ice is automatically charged from the ice making machine in the ice making chamber 25 with the slide door 30 closed.

  As shown in FIG. 2, the cabinet 1 is provided with a right slide door 32 positioned in front of the upper freezer compartment 26. The right slide door 32 is linearly movable in the front-rear direction between a closed state in which the front surface of the upper freezer compartment 26 is closed and an open state in which the front surface of the upper freezer chamber 26 is opened. A freezing container is supported on the. This freezing container is filled with food to be stored frozen, and is stored in the upper freezer compartment 26 with the right slide door 32 closed, and forward from the upper freezer compartment 26 with the right slide door 32 open. Drawn out.

  As shown in FIG. 4, rails 33 that are located in the lower freezer compartment 24 and extend in the front-rear direction are formed on each of the left side plate and the right side plate of the inner box 3. Each of the rails 33 protrudes toward the center in the left-right direction of the lower freezer compartment 24, and the upper surfaces of the rails 33 are set to have a horizontal height. A protruding guide 34 is formed on the left side plate of the inner box 3 so as to face the rail 33 of the left side plate with a gap from above. The right side plate of the inner box 3 has a gap on the rail 33 of the right side plate with a gap from above. Projecting guides 34 that are opposed to each other are formed. As shown in FIG. 2, an arm 35 extending in the front-rear direction is inserted into the gap between the rail 33 and the guide 34 on the right side plate of the inner box 3. An arm 35 extending in the front-rear direction is inserted in the gap between them, and a roller is attached to the rear end of each of the arms 35 so as to be rotatable about an axis extending in the left-right direction. Each of these rollers is placed on the upper surface of the lower rail 33, and both arms 35 move linearly in the front-rear direction along the upper surface of the rail 33 based on the rolling of the rollers. Has been made possible.

  As shown in FIG. 2, a common lower slide door 36 is connected to the front end portions of both arms 35. The lower slide door 36 corresponds to a door, and both arms 35 are connected to each other via the lower slide door 36. The lower slide door 36 has a horizontally long rectangular shape and moves linearly in the front-rear direction between the open position and the closed position based on the fact that each of the rollers rolls along the upper surface of the rail 35. Has been made possible. The open position of the lower slide door 36 refers to the forward movement limit position, and the closed position refers to the backward movement limit position.

  As shown in FIG. 4, an electromagnet 37 is fixed to the rear plate of the inner box 3 so as to be positioned in the gap between the rails 33 and the guides 34 of each set. A vertical magnetic plate facing the electromagnet 37 from the front is fixed. Each of these electromagnets 37 is formed by winding a coil around a core. When the lower slide door 36 is operated from the front to the rear, the respective magnetic plates of both arms 35 enter the magnetic field of the electromagnet 37. Based on this, a magnetic attractive force acts on the magnetic plate from each of the electromagnets 37, and the lower slide door 36 is pulled into the closed position by the magnetic attractive force. That is, each set of magnetic plates and electromagnets 37 constitute a pull-in mechanism that pulls the lower slide door 36 into the closed position.

  As shown in FIG. 3, the lower slide door 36 is constituted by filling a hollow door case 38 with a heat insulating material 39 such as urethane foam. The door case 38 includes a door front plate 40 and a door. The rear plate 41, the upper cap 42, and the lower cap 43 (see FIG. 2) are joined to each other. The door front plate 40 is formed by bending a steel plate, and has a U-shaped frame shape in which each of an upper surface, a lower surface, and a rear surface is opened. Each of the door rear plate 41, the upper cap 42, and the lower cap 43 is made of synthetic resin, and the rear surface of the door front plate 40 is closed by the door rear plate 41. As shown in FIG. 2, the gap 41 is closed from above by an upper cap 42 and from below by a lower cap 43. A groove 44 is formed in the door rear plate 41 of the lower slide door 36 as shown in FIG. The groove 44 has a rear surface opened, and is formed in the entire outer peripheral portion of the door rear plate 41 so as to surround the lower slide door 36.

  As shown in FIG. 5, a rubber packing 45 is fixed to the lower slide door 36. The packing 45 has an annular packing body 46 that surrounds the lower slide door 36 and an annular attachment portion 47 that surrounds the lower slide door 36, and press-fits the attachment portion 47 into the groove 44 of the door rear plate 41. Based on this, it is fixed to the lower slide door 36. The packing body 46 of the packing 45 is hollow, and a partition wall 48 is formed inside the packing body 46. This partition wall 48 divides the packing body 46 into an outer seal portion 49 on the outer peripheral side and an inner seal portion 50 on the inner peripheral side. When the lower slide door 36 is moved to the closed position, the partition wall 48 The upper side is elastically crushed between the door rear plate 41 and the lower seat surface 23 of the front frame 21, and the left side of the outer seal portion 49 is elastic between the door rear plate 41 and the left flange portion 6 of the outer box 2. The right side of the outer seal portion 49 is elastically crushed between the door rear plate 41 and the right flange portion 7 of the outer box 2, and the lower side of the outer seal portion 49 is the door rear plate 41 and the outer box 2. The front surface of the lower freezer compartment 24 is sealed in an airtight state based on being elastically crushed between the bottom flange portions 5.

  As shown in FIG. 5, a lock magnet 51 is accommodated in the outer seal portion 49 of the packing 45. The lock magnet 51 has an annular shape surrounding the lower slide door 36, and the lower slide door 36 has the lock magnet 51 in addition to the magnetic forces of the two electromagnets 37 and the bottom flange portion 5 of the outer box 2 and the outer box 2. The left flange portion 6, the right flange portion 7 of the outer box 2, and the lower seating surface 23 of the front frame 21 are held by the magnetic force to be held in the closed position. A bead 52 is formed on the door rear plate 41 of the lower slide door 36. The bead 52 has an annular shape surrounding the door rear plate 41 and is disposed on the inner peripheral portion of the packing 45. The bead 52 protrudes rearward from the remaining rear surface of the door rear plate 41 excluding the bead 52, and the amount of crushing of the outer seal portion 49 of the packing 45 when the lower slide door 36 is operated to the closed position. Each of the outer seal portion 49 and the inner seal portion 50 is set so as to protrude rearward from the rear surface of the bead 52. ΔH in FIG. 5 indicates the protruding amounts of the outer seal portion 49 and the inner seal portion 50 when the lower slide door 36 is operated to the closed position.

  As shown in FIG. 1, a common lower freezing container 53 is attached to each of the arms 35 of the lower slide door 36. The upper surface of the lower freezing container 53 is open, and food for freezing and storing through the upper surface is put into and out of the lower freezing container 53. The lower freezing container 53 is provided with an intermediate freezing container 54 having an upper surface opened, the middle freezing container 54 is provided with an upper freezing container 55 having an upper surface opened, and the lower slide door 36 is provided with both arms 35 interposed therebetween. The lower freezing container 53, the middle freezing container 54, and the upper freezing container 55 are mounted in three stages in the vertical direction. Each of the lower freezing container 53 to the upper freezing container 55 moves integrally with the lower slide door 36, and is housed in the lower freezer compartment 24 based on the operation of the lower slide door 36 to the closed position. In a state where the lower slide door 36 is operated to the open position, the lower slide door 36 is pulled forward from the lower freezer compartment 24.

  As shown in FIG. 1, a rear cool air duct 56 is fixed inside the cabinet 1 at the rear end portion in the freezer compartment 24. The rear cool air duct 56 has a shape extending in the vertical direction. The rear cool air duct 56 has a cool air inlet 57 located at the lower end and a cool air outlet located at the upper end. . Thereafter, a fan device 58 is fixed in the cold air duct 56. The fan device 58 is formed by connecting a fan to a rotating shaft of a fan motor. During operation of the fan motor, air in the freezer compartment 24 is sucked into the rear cool air duct 56 from the cool air inlet 57, and the rear cool air duct 56. After rising up, it is discharged from the cold air outlet.

  As shown in FIG. 1, a front cool air duct 59 is fixed inside the cabinet 1 in front of the rear cool air duct 56. The front cool air duct 59 has a shape extending in the vertical direction, and the upper end of the front cool air duct 59 is connected to the cool air outlet at the upper end of the rear cool air duct 56. The pre-cool air duct 59 includes an ice making chamber outlet 60 that opens into the ice making chamber 25, an upper freezing chamber outlet that opens into the upper freezing chamber 26, a lower freezing container outlet 61 that opens toward the lower freezing container 53, and an intermediate freezing container. An intermediate freezing container outlet 62 opening toward the upper freezing container 55 and an upper freezing container outlet 63 opening toward the upper freezing container 55 are formed, and the air discharged from the cold air outlet of the rear cold air duct 56 is contained in the front cold air duct 59. After being entered into the ice making room 25 from the ice making room outlet 60, from the upper freezing room outlet into the upper freezing room 26, and from the lower freezing container outlet 61 toward the lower freezing container 53, the middle freezing container It is discharged from the outlet 62 toward the middle freezing container 54 and discharged from the upper freezing container outlet 63 toward the upper freezing container 55. The upper freezing container outlet 63 has a rectangular cylindrical shape that descends from the rear to the front, and a horizontal seating surface 64 is formed at the upper freezing container outlet 63 as shown in FIG.

  A refrigeration evaporator 65 for the refrigeration cycle is fixed in the rear cool air duct 56 of the freezer compartment 24 as shown in FIG. The refrigeration evaporator 65 is supplied with refrigerant from the compressor 18 in the machine room 17, and is based on cooling the air passing through the rear cool air duct 56 and in the ice making room 25 and the upper freezer room 26. Cold air is circulated in each of the lower freezing chambers 24, and each of the insides of the ice making chamber 25 to the lower freezing chamber 24 is controlled to a temperature range in which food can be stored frozen.

  As shown in FIG. 3, the upper cap 42 of the lower slide door 36 is formed with a vertical plate-shaped handle 66 located at the front end. As shown in FIG. 2, the handle portion 66 is formed in the entire left and right direction of the upper cap 42, and is located behind the handle portion 66 on the door front plate 40 of the lower slide door 36. Thus, a recess 43 is formed. The recessed portion 43 is recessed rearward relative to the remaining portion of the door front plate 40 excluding the recessed portion 43, and is formed in the remaining portion of the door front plate 40 excluding the left end portion and the right end portion. As shown in FIG. 3, the recess 43 forms a space portion 67 for hooking a finger from below on the handle portion 66, and the lower slide door 36 passes from below to the handle portion 66 through the space portion 67. It is possible to operate from front to back by hooking a finger on the.

  As shown in FIG. 6, a mechanism chamber 68 is formed in the upper cap 42. The mechanism chamber 68 has an upper surface and a rear surface opened, and the bottom surface of the mechanism chamber 68 is set in a step shape in which the front half is disposed at a lower position than the rear half, as shown in FIG. ing. The mechanism chamber 68 is disposed at a portion that is biased to the left with respect to the center line of the lower slide door 36 in the left-right direction. The mechanism chamber 68 is made of a permanent magnet as shown in FIG. A door magnet 69 is fixed. The door magnet 69 is disposed at the left rear corner in the mechanism chamber 68, and a door switch 70 is housed in the front frame 27 of the cabinet 1 so as to be located behind the door magnet 69. This door switch 70 is a proximity switch such as a Hall IC whose state is switched by a magnetic force. When the lower slide door 36 is operated to the closed position, the door magnet 69 enters the detection area of the door switch 70. Accordingly, the door switch 70 is turned on, and when the lower slide door 36 is operated from the closed position to the front off position, the door switch 69 is turned off based on the door magnet 69 retracting from the detection area of the door switch 70. Is done. The off position of the lower slide door 36 is set to the rear of the open position. When the lower slide door 36 is operated forward from the closed position, the lower slide door 36 is located before the lower slide door 36 reaches the open position from the closed position. The door switch 70 is switched from the on state to the off state.

  A left arm 71 is accommodated in the mechanism chamber 68 as shown in FIG. The left arm 71 extends in the left-right direction, and a left shaft 72 extending in the up-down direction is inserted into the left end portion of the left arm 71. The left shaft 72 is fixed to the bottom plate of the mechanism chamber 68, and the left arm 71 is housed in the mechanism chamber 68 so as to be rotatable about the left shaft 72. A right arm 73 is accommodated in the mechanism chamber 68. The right arm 73 extends in the left-right direction, and a right shaft 74 extending in the up-down direction is inserted into the right end of the right arm 73. The right shaft 74 is fixed to the bottom plate of the mechanism chamber 68, and the right arm 73 is accommodated in the mechanism chamber 68 so as to be rotatable about the right shaft 74. A center shaft 75 extending in the vertical direction is inserted into the right arm 73. The middle shaft 75 is inserted into the right end portion of the left arm 71, and the left arm 71 and the right arm 73 are connected to each other via the middle shaft 75 so as to be rotatable. The left shaft 72 and the right shaft 74 are arranged on a common straight line extending in the left-right direction, and the distance between the left shaft 72 and the middle shaft 75 is set to be the same as the distance between the right shaft 74 and the middle shaft 75. Has been. The left arm 71 and the right arm 73 constitute a link mechanism, and each of the left arm 71 and the right arm 73 corresponds to an arm.

  As shown in FIG. 7, a mandrel 76 that is located on the bottom plate of the mechanism chamber 68 and extends upward is fixed to the upper cap 42. A coil portion of a return spring 77 is inserted into the outer peripheral surface of the mandrel 76. Yes. The return spring 77 is a torsion spring, and includes a coil portion, a long arm portion, and a short arm. A protruding spring stopper 78 is fixed to the upper cap 42 at the bottom plate of the mechanism chamber 68, and a short arm portion of the return spring 77 is in contact with the spring stopper 78. The long arm portion of the return spring 77 is in contact with the rear surface of the right arm 73, and the right arm 73 is directly urged counterclockwise in FIG. 71 is indirectly biased clockwise by the spring force of the return spring 77 in FIG.

  As shown in FIG. 7, a front arm stopper 79 is fixed in the mechanism chamber 68 of the upper cap 42 so as to be positioned in front of the middle shaft 75. The front arm stopper 79 is made of a rubber or a cushioning material such as silicon, which is softer than the left arm 71 and the right arm 73. The left arm 71 and the right arm 73 each have a right arm 73 and a return spring 77. The urging force is held at an off position that is linear with each other based on contact with the front arm stopper 79. An operation arm 80 is formed on the right arm 73. The operation arm 80 refers to a portion arranged in parallel to the left arm 71 behind the left arm 71 in a state where the left arm 71 and the right arm 73 are held in the off position. A cylindrical pin 81 protruding upward is fixed.

  As shown in FIG. 7, the left connecting shaft 82 is rotatably inserted into the left arm 71 and positioned between the left shaft 72 and the middle shaft 75, and the right arm 73 is interposed between the right shaft 74 and the middle shaft 75. The right connecting shaft 83 is rotatably inserted. Each of the left connecting shaft 82 and the right connecting shaft 83 has a cylindrical shape extending in the vertical direction, and the distance between the left connecting shaft 82 and the middle shaft 75 is the same as the distance between the right connecting shaft 83 and the middle shaft 75. Is set to The rear end of the horizontal left plate 84 is rotatably connected to the left connecting shaft 82, and the rear end of the horizontal right plate 85 is rotatably connected to the right connecting shaft 83. A common operation button 86 is joined to the front end portion of the plate 84 and the front end portion of the right plate 85. The operation button 86 corresponds to an operator. In a non-operation state where no operation force is applied to the operation button 86, the operation button 86 is hooked by the spring force of the return spring 77 as shown in FIG. Each of the left arm 71 and the right arm 73 is held at the off position.

  As shown in FIG. 7, a rear arm stopper 102 made of a cushioning material such as rubber or silicon is fixed to the upper cap 42 as positioned on the bottom plate of the mechanism chamber 68. Thereafter, the arm stopper 102 has a triangular prism shape protruding upward from the bottom plate of the mechanism chamber 68. When the operation button 86 is pushed backward from the non-operation position against the spring force of the return spring 77, As shown in FIG. 8, the left arm 71 rotates counterclockwise about the left shaft 72, the right arm 73 rotates clockwise about the right shaft 74, and the right arm 73 is the rear arm. Based on the contact with the stopper 102, the pressing operation of the operation button 86 is stopped. When the operation button 86 is stopped from being pressed, each of the left arm 71 and the right arm 73 moves to an off position where the “U” shape is obtained. That is, the operation button 86 can be moved linearly in the front-rear direction between the non-operation position and the operation position behind the non-operation position.

  As shown in FIG. 7, the upper cap 42 is formed with a support shaft 87 corresponding to the shaft located on the bottom plate of the mechanism chamber 68. The support shaft 87 has a columnar shape extending in the vertical direction, and a horizontal plate-shaped magnet base 88 is rotatably inserted into the outer peripheral surface of the support shaft 87. The magnet base 88 corresponds to a magnet base, and an arcuate cam groove 89 is formed in the magnet base 88. The cam groove 89 has an upper surface and a lower surface that are open, and a pin 81 of the right arm 73 is inserted into the cam groove 89. The pin 81 rotates the magnet base 88. The magnet base 88 is positioned at the rear end of the cam groove 89 with the operation button 86 held in the non-operation position. Hold in the off position. When the operation button 86 is pushed from the non-operation position of FIG. 7 to the operation position of FIG. 8, the magnet base is based on the fact that the pin 81 moves rearward along the cam groove 89 as shown in FIG. 88 is rotated from the off position to the on position in the counterclockwise direction.

  As shown in FIG. 7, a button magnet 90 made of a permanent magnet is fixed to the upper surface of the magnet base 88 so as to be positioned away from the cam groove 89. The button magnet 90 has a rectangular shape in plan view, and has a long side 91 having a large length and a short side 92 having a small length compared to the long side 91. A chamfered portion 93 is formed on the button magnet 90. The chamfered portion 93 has a chamfered shape in which the apexes at which the long side portion 91 and the short side portion 92 intersect with each other are cut off, and the button magnet 90 is straight in the backward direction at the non-operation position of the operation button 86. And the long side portion 91 is held at the invalid position where the long side portion 91 is directed diagonally to the right. When the operation button 86 is pushed from the non-operation position to the operation position, the button magnet 90 is rotated based on the magnet base 88 rotating counterclockwise about the support shaft 87 as shown in FIG. Is moved in the circumferential direction around the support shaft 87, and the chamfered portion 93 is directed to the left diagonally rearward position, and the long side portion 91 is moved to the effective position that is directed straight rearward. A one-dot chain line ML in FIG. 7 indicates the turning locus of the right apex of the chamfered portion 93, and the button magnet 90 has a remaining portion excluding the bead 52 on the rear surface of the lower slide door 36. It arrange | positions so that it may protrude rearward.

  As shown in FIG. 7, a button switch 94 is fixed inside the front frame 27 so as to be located behind the button magnet 90. The button switch 94 is a proximity switch such as a Hall IC whose state can be switched by a magnetic force. When the button magnet 90 is in an invalid position where the operation button 86 is held at a non-operation position, the button switch 94 is moved from the chamfered portion 93 of the button magnet 90 to the button. At the effective position of the button magnet 90 in which a small magnetic force is applied toward the switch 94 and the operation button 86 is pushed into the operation position, the long side portion 91 of the button magnet 90 is applied to the button switch 94 as shown in FIG. A large magnetic force acts toward it. At the invalid position of the button magnet 90, the magnitude of the magnetic force applied from the button magnet 90 to the button switch 94 does not reach the operation level of the button switch 94, and the button switch 94 is held in the off state. At the effective position of the button magnet 90, the magnitude of the magnetic force acting on the button switch 94 from the button magnet 90 exceeds the operation level of the button switch 94, and the button switch 94 is switched from the off state to the on state. That is, the button switch 94 detects whether or not the operation button 86 has been operated in a non-contact manner, and corresponds to an operator switch.

  As shown in FIG. 5, a mechanism chamber cover 95 is detachably attached to the upper cap 42. The mechanism chamber cover 95 has a top plate 96 that closes the upper surface of the mechanism chamber 68 and a rear plate 97 that closes the rear surface of the mechanism chamber 68. A part of the rear plate 97 of the mechanism chamber cover 95 is a part of the lower slide door 36. The door rear plate 41 protrudes rearward from the rear surface of the remaining portion excluding the bead 52, and the movement locus ML of the button magnet 90 is allowed to protrude rearward from the rear surface of the door rear plate 41 excluding the bead 52. ing. The mechanism chamber cover 95 shields the door magnet 69, the left arm 71, the right arm 73, the return spring 77, the magnet base 88, and the button magnet 90 in the mechanism chamber 68 so that they cannot be visually recognized. The top plate 96 of the chamber cover 95 comes into contact with the support shaft 87 of the magnet base 88 from above by the joining force to the upper cap 42 of the mechanism chamber cover 95. Support from below.

  As shown in FIG. 5, the mechanism chamber cover 95 is formed with a bottomed groove-shaped flange 98 that is positioned at the front end portion of the top plate 96 and linearly extends in the left-right direction. The flange 98 receives water dropped on the top plate 96 of the mechanism chamber cover 95, and the top plate 96 of the mechanism chamber cover 95 is formed with an inclined surface 99 that rises backward from the flange 98. The bottom surface of the ridge 98 is set to be inclined to the left and right from the center in the left-right direction, and the water in the ridge 98 is either left or right along the inclination of the bottom surface of the ridge 98. After flowing into the crab, it falls downward from either the left end surface or the right end surface of the ridge 98.

  As shown in FIG. 6, a left discharge rod 100 and a right discharge rod 101 are formed on the upper cap 42. Each of the left discharge rod 100 and the right discharge rod 101 has a bottomed groove shape extending in the front-rear direction, and has an inclined bottom surface that descends from the front to the rear. The left discharge rod 100 receives water falling from the left end surface of the rod 98, and the water in the left discharge rod 100 flows from the front to the rear along the bottom surface of the left discharge rod 100 and then from the left discharge rod 100. Discharged. The right discharge rod 101 receives water falling from the right end surface of the rod 98, and the water in the right discharge rod 101 flows from the front to the rear along the bottom surface of the right discharge rod 101 and then from the right discharge rod 101. Discharged. In other words, the rod 98, the left discharge rod 100, and the right discharge rod 101 prevent water from entering the mechanism chamber 68 from the mechanism chamber cover 95.

  Inside the cabinet 1, as shown in FIG. 1, a door operation device 110 is mounted in the freezer compartment 20. As shown in FIG. 10, this door operation device 110 uses an electromagnetic solenoid 200 including a solenoid coil 129 and a plunger 134 as a drive source, and operates with the lower slide door 36 held in the closed position. Based on the above, the lower slide door 36 is moved forward from the closed position. The detailed configuration of the door operation device 110 is as follows.

  As shown in FIG. 10, the solenoid case 111 has an open top surface and is set in an elongated shape extending in the front-rear direction. A horizontal mounting surface 112 is formed at the rear end of the solenoid case 111, and the mounting surface 112 is mounted on the horizontal seating surface 64 of the upper freezer container outlet 63 in surface contact as shown in FIG. Is placed. The solenoid case 111 is made of a synthetic resin. As shown in FIG. 10, the solenoid case 111 has an inclined surface 113 located behind the mounting surface 112. The inclined surface 113 rises from the front to the rear, and is placed in surface contact with the surface of the upper freezing container outlet 63 as shown in FIG.

  As shown in FIG. 10, each of the left side plate and the right side plate of the solenoid case 111 is formed in the remaining part of the solenoid case 111 except for the front end portion. A left escape portion 114 corresponding to a non-formed portion of the left side plate is formed, and a right escape portion 115 corresponding to a non-formed portion of the right side plate is formed on the right side portion of the solenoid case 111. Each of the left escape portion 114 and the right escape portion 115 is for escaping the front frame 27 of the cabinet 1, and the front end portion of the solenoid case 111 escapes the front frame 27 of the cabinet 1 as shown in FIG. Thus, it is applied to the front frame 27 from below. As shown in FIG. 10, a boss portion 116 is formed on the bottom plate of the solenoid case 111 at each of the left front end portion and the right front end portion. Each of these boss portions 116 has a cylindrical shape whose upper and lower surfaces are open, and the front end portion of the solenoid case 111 is screwed into the front frame 27 through the boss portions 116 from below as shown in FIG. Are fixed to the lower surface of the front frame 27 based on screwing. The solenoid case 111 is disposed at the center of the lower slide door 36 in the left-right direction. At the front end of the solenoid case 111, as shown in FIG. Is formed. The arcuate surface 117 prevents the fingers from being damaged when the user tries to push the lower slide door 36 into the closed position and pinches the fingers between the lower slide door 36 and the front end of the solenoid case 111. The cross-section arc is set.

  A solenoid chamber 118 is formed in the solenoid case 111 as shown in FIG. The solenoid chamber 118 has a concave shape with an open top surface, and a recess 119 with an open top surface is formed on the front wall of the solenoid chamber 118. The concave portion 119 has a circular inner peripheral surface, and a bellows fixture 120 is inserted into the inner peripheral surface of the concave portion 119 as shown in FIG. The bellows fixture 120 has a cylindrical shape extending in the front-rear direction. As shown in FIG. 12, the bellows fixture 120 has an inclined portion 121 whose diameter dimension decreases from the rear to the front as shown in FIG. Is formed. A rear plate 122 having a rectangular shape larger than that of the bellows fixture 120 is fixed to the rear end portion of the bellows fixture 120, and a front portion having a rectangular shape larger than that of the bellows fixture 120 is fixed to the front end portion of the bellows fixture 120. A plate 123 is fixed.

  As shown in FIG. 12, the solenoid case 111 is formed with a left plate 124 and a right plate 125 located in the solenoid chamber 118. Each of the left plate 124 and the right plate 125 is perpendicular to the front wall of the solenoid chamber 118 through a gap from behind, and the gap between the front wall of the solenoid chamber 118 and the left plate 124 is from above. A rear plate 122 of the bellows fixture 120 is inserted. The rear plate 122 is also inserted into the gap between the front wall of the solenoid chamber 118 and the right plate 125 from above, and the bellows fixture 120 is such that the rear plate 122 contacts the left plate 124 and the right plate 125, respectively. , The rear plate 122 is prevented from being displaced forward based on the contact of the rear plate 122 with the front wall of the solenoid chamber 118, and the rear plate 122 is prevented from being displaced from the bottom wall of the solenoid chamber 118. It is prevented from being displaced in the circumferential direction based on contact with.

  As shown in FIG. 12, a plurality of boss portions 126 having a cylindrical shape are formed on the bottom plate of the solenoid case 111 so as to be located in the solenoid chamber 118. A coil case 127 is accommodated in the solenoid chamber 118 as shown in FIG. The coil case 127 has a rectangular tube shape with an upper surface and a lower surface opened, and includes a front plate, a rear plate, a left side plate, and a right side plate. As shown in FIG. 12, the coil case 127 is formed with a plurality of attachment portions 128. Each of the plurality of attachment portions 128 has a cylindrical shape, and is fitted to the outer peripheral surface of the boss portion 126 as shown in FIG. Screws are screwed onto the respective inner peripheral surfaces of the plurality of boss portions 126 from above, and the coil case 127 is fixed in the solenoid chamber 118 by a fastening force of the plurality of screws.

  As shown in FIG. 10, a solenoid coil 129 is fixed inside the coil case 127. The solenoid coil 129 has a cylindrical shape extending in the front-rear direction, and a power line 130 is connected to each of the winding start end and winding end of the solenoid coil 129. An opening 131 is formed in the solenoid case 111. The opening 131 is disposed at the left rear corner of the solenoid case 111, and each of the power supply lines 130 is led out of the solenoid case 111 through the opening 131.

  As shown in FIG. 12, a common connector 132 is connected to each of the power supply lines 130 outside the solenoid case 111, and the connector 132 is connected to a power supply circuit via a pair of connectors. Yes. This power supply circuit is housed in the machine room 17 of the cabinet 1, and drive power is applied to the solenoid coil 129 from the power supply circuit through both power supply lines 130. Relay contacts are interposed in the power supply path between the power supply circuit and the solenoid coil 129. The contact of this relay is a normally-open type that is held in an open state that opens the power supply path when the relay coil is off, and is in a closed state that closes the power supply path when the relay coil is turned on. Switch. That is, drive power is applied to the solenoid coil 129 from the power supply circuit when the relay coil is on, and the drive power is shut off when the relay coil is off.

  As shown in FIG. 13, a circular through hole 133 is formed in the rear plate of the coil case 127, and a cylindrical plunger 134 extends in the front-rear direction through the through hole 133 from behind in the solenoid coil 129. It is inserted so that it can move linearly. The plunger 134 is made of a magnetic material such as iron, and is disposed at the center in the left-right direction of the lower slide door 36. An annular flange 135 having a diameter larger than that of the plunger 134 is fixed to the rear end of the plunger 134, and a stopper 136 is fixed in the solenoid case 111 at the rear of the flange 135. ing.

  As shown in FIG. 13, a return spring 137 is inserted between the rear plate of the coil case 127 and the flange 135 on the outer peripheral surface of the plunger 134. The return spring 137 is composed of a compression coil spring, and when the drive power of the solenoid coil 129 is cut off, the flange portion 135 is a stopper based on the plunger 134 being operated backward by the spring force of the return spring 137. It is held in the retracted position in contact with 136. When drive power is applied to the solenoid coil 129 from the power supply circuit, the plunger 134 moves forward from the retracted position against the spring force of the return spring 137 based on the magnetic attractive force acting on the plunger 134 from the solenoid coil 129. Moving. As shown in FIG. 14, the advancement of the plunger 134 stops at the advance position based on the contact between the wires of the return spring 137, and when the drive power to the solenoid coil 129 is shut off, the plunger 134 is moved. However, the spring force of the return spring 137 returns from the advanced position where the wires are in contact with each other to the retracted position.

  As shown in FIG. 13, a solenoid cover 138 made of synthetic resin is fixed to the solenoid case 111. As shown in FIG. 10, the solenoid cover 138 has a concave cover body 139 whose bottom surface is open and a flange 140 that surrounds the cover body 139. The cover body 139 is provided on the outer peripheral surface of the bellows fixture 120. A semicircular recess 141 in surface contact is formed, and a plurality of through holes 142 are formed in the flange 140. The flange 140 is placed on the upper end surface of the chamber wall of the solenoid chamber 118, and the solenoid cover 138 is screwed onto the upper end surface of the chamber wall of the solenoid chamber 118 through the plurality of through holes 142 from above. To be joined based on. A packing 143 made of rubber such as EPDM is interposed between the flange 140 of the solenoid cover 138 and the upper end surface of the solenoid chamber 118 as shown in FIG. This packing 143 is elastically sandwiched between the flange 140 of the solenoid cover 138 and the upper end surface of the chamber wall of the solenoid chamber 118, and the flange 140 of the solenoid cover 138 and the upper end surface of the chamber wall of the solenoid chamber 118 are mutually connected. The space is sealed in an airtight state by packing 143.

  As shown in FIG. 13, the rear end portion of the connector rod 144 extending in the front-rear direction is fixed to the front end portion of the plunger 134. The connector rod 144 has a cylindrical shape concentric with the plunger 134, and the diameter dimension of the connector rod 144 is set smaller than the diameter dimension of the plunger 134. The front end portion of the connector rod 144 passes through the front plate of the coil case 127 and protrudes forward of the coil case 127, and protrudes forward of the bellows fixture 120 through the interior of the bellows fixture 120. A rubber bellows 145 is inserted into the outer peripheral surface of the connector rod 144. The bellows 145 has a cylindrical shape whose diameter increases from one end to the other end, and a pinching portion 146 is formed at the other end of the bellow 145 as shown in FIG. . The sandwiching portion 146 has a cylindrical shape whose diameter is reduced from the rear to the front, and is press-fitted into the outer peripheral surface of the inclined portion 121 of the bellows fixture 120. A bellows presser 147 is fitted to the inclined part 121 of the bellows fixing tool 120 from above the clamping part 146 of the bellows 145. The bellows presser 147 has a cylindrical shape whose diameter is reduced from the rear to the front, and the sandwiching portion 146 of the bellows 145 is sandwiched between the inclined portion 121 of the bellows fixture 120 and the bellows presser 147. The bellows 145 is prevented from being twisted in the circumferential direction via the bellows fixture 120.

  As shown in FIG. 13, a rectangular rod cover 148 is formed at one end of the bellows 145. The rod cover 148 closes one end of the bellows 145, and the inner space of the bellows fixture 120 is sealed in an airtight state by the bellows 145 so that cold air does not enter from the outside. The cover 138, the packing 143, and the bellow 145 are closed in an airtight state so that cold air does not enter from the outside. A rectangular head portion 149 is press-fitted into the rod cover 148. The head portion 149 is formed at the front end portion of the connector rod 144, and the front end portion of the connector rod 144 is connected to one end portion of the bellows 145 in a non-rotating state by the adhesion between the rod cover 148 and the head portion 149. The connector rod 144 is prevented from rotating via the bellows 145 and the bellows fixture 120, respectively.

  As shown in FIG. 13, the bellows 145 is folded back in the middle in the front-rear direction so that each of the one end and the other end protrudes in front of the bellows fixture 120 with the plunger 134 held in the retracted position. As shown in FIG. 14, the plunger 134 moves from the retracted position to the advanced position by elastically deforming so that the folded portion moves forward as the plunger 134 moves forward. The plunger 134 is allowed to move from the forward movement position to the backward movement position by elastically deforming so that the folded portion moves backward in accordance with the backward movement of the plunger 134.

  As shown in FIG. 12, the left partition plate 150 and the right partition plate 151 are formed on the bottom plate of the solenoid case 111, respectively. Each of the left partition plate 150 and the right partition plate 151 is a vertical one extending in the front-rear direction, and each of the rear end portion of the left partition plate 150 and the rear end portion of the right partition plate 151 is on the front wall of the solenoid chamber 118. Each of the front end portion of the left partition plate 150 and the front end portion of the right partition plate 151 is connected to the front plate of the solenoid case 111. The left partition plate 150 and the right partition plate 151 are opposed to each other with a gap in the left-right direction. A space-like rod storage chamber 152 is formed between the left partition plate 150 and the right partition plate 151. Yes.

  A push rod 153 is housed in the rod housing chamber 152 of the solenoid case 111 as shown in FIG. The push rod 153 is made of synthetic resin and has a pusher 154, an arm 155, and a connector 156. The connector 156 has a vertically long rectangular tube shape whose bottom surface is closed, and the connector 156 is formed with a groove portion 157 located on the rear wall and having an upper surface opened. As shown in FIG. 13, the front end portion of the connector rod 144 is inserted into the groove portion 157 from above, and the head portion 149 of the connector rod 144 is engaged with the inner surface of the connector 156 together with the rod cover 148 of the bellows 145. Is connected to the connector 156. The pusher 154 has a solid quadrangular prism shape extending in the front-rear direction, as shown in FIG. 12, and is arranged at the center in the left-right direction of the lower slide door 36, as shown in FIG. As shown in FIG. 13, the pusher 154 is disposed at a lower position than the connector rod 144, and is interposed between the lower surface of the front frame 27 and the bottom surface of the solenoid case 111. The arm 155 connects the connector 156 and the pusher 154 to each other, and has a horizontal plate shape extending in the front-rear direction.

  As shown in FIG. 10, a cushion 158 is fixed to the front end portion of the pusher 154, and an opening 159 is formed in the solenoid case 111 so as to be positioned in front of the cushion 158. The cushion 158 is made of a cushioning material such as soft rubber compared to the pusher 154 and the door rear plate 41 of the lower slide door 36. When the solenoid coil 129 is off, the front end surface of the cushion 158 is a solenoid. The pusher 134 is held at the retracted position so as to retract backward from the front end surface of the case 111. As shown in FIG. 14, the pusher 154 protrudes forward of the solenoid case 111 through the opening 159 of the solenoid case 111 when the solenoid coil 129 is on, and the solenoid coil 129 when the lower slide door 36 is closed. When is turned on, as shown in FIG. 15, the pusher 154 pushes the central portion in the left-right direction of the lower slide door 36 from the back to the front based on the fact that the pusher 154 projects forward of the solenoid case 111. The cushion 158 reduces the impact force when the pusher 154 collides with the door rear plate 41 of the lower slide door 36. The suction of the lower slide door 36 by the lock magnet 51 and the electromagnet 37 is the pushing force of the pusher 154. The lower slide door 36 is moved forward from the closed position by the pressing force of the pusher 154.

  As shown in FIG. 5, the pusher 154 has an upper half facing the inner seal portion 50 of the packing 45 from the rear, and the retracted position of the pusher 154 forms a gap between the inner seal portion 50 and the cushion 158. Is set to be. A packing pressing portion 160 and a door pressing portion 161 are set on the front end surface of the pusher 154. The packing pressing portion 160 refers to a portion facing the inner seal portion 50 of the packing 45 from the rear via the cushion 158, and the door pressing portion 161 faces the bead 52 of the lower slide door 36 from the rear via the cushion 158. When the solenoid coil 129 is turned on with the lower slide door 36 being operated to the closed position, the plunger 134 moves from the retracted position to the advanced position, and the plunger 134 moves from the retracted position to the advanced position. The pusher 154 moves and moves forward from the closed position based on the pressing force of the pusher 154 by the moving force. The behavior of the pusher 154 is as follows.

  When the solenoid coil 129 is turned on, the packing pressing portion 160 of the pusher 154 is packed through the cushion 158 before the door pressing portion 161 of the pusher 154 contacts the bead 52 of the lower slide door 36 as shown in FIG. The inner seal part 50 of 45 is elastically deformed based on pressing forward. Based on the fact that the door pressing portion 161 of the pusher 154 presses the bead 52 of the lower slide door 36 forward through the cushion 158 while the inner seal portion 50 is elastically deformed, the lock magnet 51 of the lower slide door 36 is moved to the front plate. 21. The two magnetic plates of the lower slide door 36 are separated from the electromagnet 37, and the lower slide door 36 is moved forward from the closed position as shown in FIG. When the door pressing portion 161 of the pusher 154 is in contact with the bead 52 of the lower slide door 36 via the cushion 158, the upper half of the cushion 158 faces the door rear plate 41 with a gap, and the pusher 154 The packing pressing part 160 presses the inner seal part 50 of the packing 45 so that the inner seal part 50 is not completely crushed.

  As shown in FIG. 12, a left front guide 162 and a left rear guide 163 are formed on the left partition plate 150 of the solenoid case 111, and a right front guide 164 and a right rear guide 165 are formed on the right partition plate 151 of the solenoid case 111. Has been. Each of the left front guide 162 to the right rear guide 165 protrudes into the rod storage chamber 152, and a gap is formed between the lower surfaces of the left front guide 162 to the right rear guide 165 and the bottom surface of the rod storage chamber 152. Has been. The left front guide 162 and the right front guide 164 oppose each other in the left-right direction across the arm 155, and the left rear guide 163 and the right rear guide 165 oppose each other in the left-right direction across the arm 155. When the plunger 134 moves forward and backward, the arm 155 moves linearly in the front-rear direction based on being guided by the four members of the left front guide 162 to the right rear guide 165. FIG. 13 shows the retracted position of the plunger 134, and FIG. 14 shows the advanced position of the plunger 134. The arm 155 is housed in the solenoid case 111 regardless of the forward and backward movement of the plunger 134, and the left front guide 162. Each of the right rear guides 165 guides only the arm 155 without contacting the pusher 154.

  The solenoid case 111 is covered with a case cover 166 as shown in FIG. As shown in FIG. 4, the case cover 166 includes a top plate, a left side plate, a right side plate, and a front plate. The upper surface of the solenoid case 111 is closed by the case cover 166. As shown in FIG. 10, a claw portion 167 is formed on each of the left side plate and the right side plate of the case cover 166 so as to be located at the center portion in the front-rear direction. Each of the claw portions 167 protrudes toward the central portion in the left-right direction of the solenoid case 111 and is inserted into the engaging portion 168. Each of these engaging portions 168 is formed in the solenoid case 111, and has a concave shape with an open bottom surface. Each of the engaging portions 168 has a ceiling surface, and the solenoid cover 166 is detached from the solenoid case 111 based on the engagement of the claw portions 167 with the ceiling surface of the engaging portion 168. Is preventing. That is, the upper surface of the solenoid case 111 is closed by the two members of the front frame 27 and the case cover 166 of the cabinet 1.

  As shown in FIG. 3, a positioning protrusion 169 is formed at the front end of the case cover 166. The positioning protrusion 169 protrudes downward from the top plate of the case cover 166 and has a vertical plate shape extending in the left-right direction. The positioning protrusion 169 is engaged in the positioning groove 170. The positioning groove 170 is formed in the front frame 27 of the cabinet 1, and the case cover 166 is held at the target position of the front frame 27 by the engaging force between the positioning protrusion 169 and the positioning groove 170.

  As shown in FIG. 11, the solenoid case 111 is formed with a plurality of left drain holes 171 and a plurality of right drain holes 172 located on the bottom plate of the rod storage chamber 152. Each of the plurality of left drain holes 171 and the plurality of right drain holes 172 discharges condensed water in the rod storage chamber 152 to the outside of the solenoid case 111 when condensation occurs in the rod storage chamber 152. Each of the plurality of left drain holes 171 is set in a slit shape extending linearly to the right from the left partition plate 150 as shown in FIG. 12, and each of the plurality of right drain holes 172 is The slit is linearly extended leftward with the right partition plate 151 as a base point. The door operation device 110 is configured as described above, and is mounted inside the cabinet 1 by the following procedure.

  In order to mount the door operating device 110 inside the cabinet 1, as shown in FIG. 4, the horizontal mounting surface 112 of the solenoid case 111 is placed on the horizontal seating surface 64 of the upper freezer container outlet 63, and the solenoid case 111 is placed. The inclined surface 113 is pressed against the surface of the upper freezing container outlet 63. With each of the mounting surface 112 and the inclined surface 113 in contact with the upper cryogenic container outlet 63, screws are screwed into the front frame 27 through the both boss portions 116 of the solenoid case 111 from below, and the solenoid case 111 is attached to the cabinet. 1 is fixed inside. When each of the mounting surface 112 and the inclined surface 113 is in contact with the upper cryogenic container outlet 63, the solenoid case 111 is positioned in the front-rear direction with respect to the cabinet 1. The inserted screw easily matches the target position of the front frame 27.

  When the solenoid case 111 is fixed inside the cabinet 1, the positioning protrusion 169 of the case cover 166 is inserted into the positioning groove 170 of the solenoid case 111 from above, and the rear end of the case cover 166 is positioned as the positioning protrusion 169 and the positioning groove. It pushes down in the engagement state between 170. Then, the left side plate of the solenoid case 111 is elastically deformed based on being pressed by the claw portion 167 of the left side plate of the case cover 166, and the right side plate of the solenoid case 111 is claw portion 167 of the right side plate of the case cover 166. The claw portions 167 of the case cover 166 are engaged with the engagement portions 168 of the solenoid case 111 by elastically deforming based on being pressed by the pressure. When the positioning projection 169 and the positioning groove 170 are engaged with each other, the case cover 166 is positioned in the front-rear direction with respect to the solenoid case 111, and both the claw portions 167 of the case cover 166 are engaged with the solenoid case 111. Easily matches the joint 168.

  A substrate box is fixed in the machine room 17. This board box contains a control board, and a control circuit is mounted on the control board. This control circuit is mainly composed of a microcomputer and has a CPU, a ROM and a RAM. Each of the door switch 70 and the button switch 94 is electrically wired in this control circuit, and the control circuit determines whether or not the lower slide door 36 is in the closed position based on an output signal from the door switch 70. Then, based on the output signal from the button switch 94, it is determined whether or not the operation button 86 has been pressed. A relay coil is connected to the control circuit, and the control circuit opens and closes the contact of the relay based on switching the relay coil in accordance with the electrical state of the door switch 70 and the button switch 94. Then, the solenoid coil 129 is on / off controlled.

  FIG. 17 is a flowchart for explaining a control program recorded in advance in the ROM of the control circuit. The processing contents of the control circuit will be described below based on the control program of FIG. When the power is turned on, the CPU of the control circuit determines whether or not the door switch 70 is turned on in step S1. For example, when the lower slide door 36 is operated to the closed position, it is determined in step S1 that the door switch 70 is turned on, and in step S2, the timer T1 is reset to “0”. This timer T1 measures the elapsed time based on the fact that the lower slide door 36 has moved to the closed position. The CPU starts timer interrupt processing at a predetermined time interval, and performs timer interrupt processing. Each time it is started, a predetermined unit value is added.

  When the CPU resets the timer T1 in step S2, the CPU proceeds to step S3 and determines whether or not the door switch 70 is turned off. For example, when the user manually operates the lower slide door 36 from the closed position to the near side without operating the operation button 86, the door switch 70 is switched from the on state to the off state. In this case, the CPU determines in step S3 that the door switch 70 is turned off, and returns to step S1. When the lower slide door 36 is operated to the closed position in this state, it is determined that the door switch 70 is turned on, and the timer T1 is reset to “0” in step S2.

  The CPU determines that the door switch 70 is not turned off in step S3 when the lower slide door 36 is operated to the closed position, and determines whether or not the button switch 94 is turned on in step S4. For example, when the user pushes the operation button 86 in a state where the lower slide door 36 is operated to the closed position, it is determined in step S4 that the button switch 94 is turned on, and the addition result of the timer T1 is operated in step S5. Compare with the prohibition time Tw (for example, 1.5 seconds). The operation inhibition time Tw is recorded in advance in the ROM of the control circuit, and when the CPU determines in step S5 that the addition result of the timer T1 has not reached the operation inhibition time Tw, the CPU returns to step S3. That is, when the user returns to the closed position based on the pressing operation of the lower slide door 36 while pressing the operation button 86, the button switch 94 is turned on without the addition result of the timer T1 reaching the operation inhibition time Tw. . In this case, the button switch 94 is turned off and the door operation device 110 does not operate.

  When the CPU determines in step S5 that the addition result of the timer T1 has reached the operation prohibition time Tw, the CPU starts driving the solenoid coil 129 based on turning on the relay coil in step S6. In step S7, the CPU starts the timer T3. Is reset to “0”. The timer T3 measures an elapsed time based on the solenoid coil 129 being turned on, and the CPU starts timer interrupt processing at a predetermined time interval and starts timer interrupt processing every time. Is incremented by a predetermined unit value.

  When the CPU resets the timer T3 in step S7, the CPU determines whether or not the door switch 70 is turned off in step S8. For example, when an excessive load exceeding the pressing force of the pusher 154 is not applied to the lower slide door 36, the lower slide door 36 moves forward from the closed position based on the start of driving of the solenoid coil 129. In this case, the CPU determines in step S8 that the door switch 70 is turned off, and proceeds to step S9.

  When the CPU determines that the door switch 70 is not turned off in step S8, the CPU compares the addition result of the timer T3 with the standby limit time Tf recorded in advance in the ROM in step S12. This standby limit time Tf is a limit value for preventing abnormal temperature rise based on continuous energization of the solenoid coil 129, and the CPU adds the result of the timer T3 in step S12 as the standby limit time Tf. When it is determined that the value has not been reached, the process returns to step S8. That is, when an excessive load exceeding the pressing force of the pusher 154 is applied to the lower slide door 36, the lower slide door 36 does not move forward from the closed position despite the solenoid coil 129 being driven, and the solenoid The coil 129 is continuously energized with the standby time limit Tf as the limit. When an excessive load is removed from the lower slide door 36 before the waiting limit time Tf elapses, the lower slide door 36 is pressed by the pusher 154 and moves forward from the closed position. In this case, the CPU determines in step S8 that the door switch 70 is turned off, and proceeds to step S9.

  If the lower slide door 36 does not move forward from the closed position even after the standby time limit Tf has elapsed, the CPU proceeds from step S12 to step S11 and stops driving the solenoid coil 129 based on turning off the relay coil. To do.

  When the CPU proceeds to step S9, the timer T2 is reset to “0”. The timer T2 measures an elapsed time based on the door switch 70 being turned off, and the CPU starts timer interrupt processing at a predetermined time interval and starts timer interrupt processing. Is incremented by a predetermined unit value.

  When the CPU resets the timer T2 in step S9, the addition result of the timer T2 is compared with the energization time Te (<Tf) recorded in advance in the ROM in step S10. This energization time Te corresponds to the drive time of the solenoid coil 129 required to move the plunger 134 from the reverse position to the forward position, and the CPU reaches the energization time Te as a result of addition of the timer T2 in step S10. When it is determined that the relay coil is turned on, the process proceeds to step S11, and the solenoid coil 129 is driven to stop based on turning off the relay coil. When the drive of the solenoid coil 129 is stopped, the lower slide door 36 is moved forward from the closed position based on being pressed by the pusher 154, and the user hooks his / her finger on the handle 66 of the lower slide door 36. Then, the lower slide door 36 can be pulled out to the open position by operating it to the front side.

  FIG. 18 shows a temporal correlation of on / off of the button switch 94, on / off of the solenoid coil 129, on / off of the door switch 70, and opening / closing of the lower slide door 36, and the lower slide door 36 is operated to the closed position. When the button switch 94 is turned on based on the operation button 86 being pushed in the state, the solenoid coil 129 is turned on in synchronization with the button switch 94 being turned on, and the lower slide door 36 is moved forward from the closed position. The door switch 70 detects that the solenoid coil 129 is turned on with a time delay.

  When the operation button 86 is operated with the lower slide door 36 open, an effective magnetic force does not act on the detection area of the button switch 94 from the button magnet 90. In this case, since the button switch 94 is not turned on, the solenoid coil 129 is not turned on and the door operation device 110 does not operate. When the pushing operation of the lower slide door 36 is performed in the operation state of the operation button 86, the on state of the button switch 94 is detected in synchronization with the door switch 70 switching from the off state to the on state. In this case, since the addition result of the timer T1 has not reached the operation prohibition time Tw, the solenoid coil 129 is not turned on and the door operation device 110 does not operate. Even when the button switch 94 is turned on based on the operation button 86 being operated before the addition result of the timer T1 reaches the operation prohibition time Tw, the door operation device 110 is not turned on and the door operation device 110 is turned on. The solenoid coil 129 is not activated and is turned on when the operation button 86 is operated in a state where the addition result of the timer T1 reaches the operation inhibition time Tw.

According to the said Example 1, there exists the following effect.
When the user erroneously pushes the operation button 86 and returns the lower slide door 36 to the closed position, the operation button 86 is operated to the operation position at the same time as the lower slide door 36 reaches the closed position. Detected. In this case, the driving power is not applied to the solenoid coil 129 because the measurement result of the timer T1 has not reached the operation inhibition time Tw. For this reason, since the door operating device 110 does not operate, it is possible to prevent the user from inadvertently applying an impact force from the pusher 154 of the door operating device 110.

  When drive power is applied to the solenoid coil 129, it is determined whether or not the lower slide door 36 is held in the closed position, and when it is determined that the lower slide door 36 is not held in the closed position, the timer T2 is reset. When it is determined that the measurement result of the timer T2 has reached the energization time Te, the drive power source of the solenoid coil 129 is shut off. For this reason, since the solenoid coil 129 is continuously energized when the lower slide door 36 does not move forward from the closed position based on an excessive load acting on the lower slide door 36, the user is excessively energized. The lower slide door 36 moves forward from the closed position simply by removing the load. This eliminates the need for the user to re-operate the operation button 86, thus improving usability.

  In the first embodiment, a retracting mechanism that pulls the lower slide door 36 into the closed position with a mechanical force when the lower slide door 36 is operated from the front to the rear may be used. In this case, a pin is provided on each of the arms 35 of the lower slide door 36, and when the lower slide door 36 is operated from the front to the rear, each of the pins is engaged with the retracting member, and the retracting member is spring spring. The lower slide door 36 may be pulled into the closed position based on operating with force.

  In the first embodiment, a motor may be used as a drive source for the door operation device 110.

The figure which shows Example 1 of this invention (sectional drawing which shows the internal structure of a refrigerator) Perspective view showing appearance of refrigerator Sectional drawing which shows the mounting state of a door opening device The perspective view which shows a freezer compartment in each removal state of a left slide door, a right slide door, and a lower slide door Sectional drawing which shows the deformation state of packing in the closed state of a lower slide door Perspective view showing inside of mechanism room Diagram showing the inside of the mechanism room when the operation buttons are not operated The figure which shows the inside of the mechanism room with the operation state of the operation button Diagram showing the mechanism room cover installed The perspective view which shows the external appearance of a door operation apparatus in an exploded state The perspective view which shows the mounting state of a solenoid case Perspective view showing the external appearance of each solenoid and solenoid case Sectional drawing which shows the internal structure of a door operation apparatus in the OFF state of a solenoid coil Sectional drawing which shows the internal structure of a door operation apparatus in the ON state of a solenoid coil Sectional drawing which shows the positional relationship among an operation button, a pusher, and a lower slide door Sectional drawing which shows the state which a pusher presses a lower slide door Flow chart showing processing contents of control circuit The figure which shows the time correlation of ON / OFF of a button switch, ON / OFF of a solenoid coil, ON / OFF of a door switch, and opening / closing of a lower slide door.

Explanation of symbols

  Reference numeral 24 denotes a lower freezer compartment (storage room), 36 denotes a lower slide door (door), 70 denotes a door switch, 86 denotes an operation button (operator), 94 denotes a button switch (operator switch), 110 denotes a door operating device, 200 Indicates an electromagnetic solenoid (drive source).

Claims (2)

A storage space to which a cool air is supplied, having a space shape with an open front surface;
A door provided to be linearly movable in the front-rear direction between a closed position for closing the front surface of the storage chamber and an open position for opening the front surface of the storage chamber;
An operator provided on the door so as to be linearly movable in the front-rear direction between a predetermined non-operation position and an operation position behind the non-operation position;
A door switch whose electrical state changes mutually depending on whether or not the door is in the closed position;
An operator switch whose electrical state changes mutually when the operator is in the non-operating position and when the operator is in the operating position;
A door operating device for moving the door forward from the closed position on the basis of the door being operated in the closed position, and having an electrical drive source;
A control circuit that drives and controls a drive source of the door operating device according to the electrical state of each of the door switch and the operator switch;
The control circuit includes:
Based on the electrical state of the door switch, the closing time during which the door is held in the closed position is measured based on the return of the door to the closed position,
When it is determined that the operation element has been operated based on the electrical state of the operation element switch, the door operation is performed on the condition that the measurement result of the closing time has reached a predetermined value. A drive power source is applied to the drive source of the apparatus, and the drive power source is not applied to the drive source of the door operating device when the measurement result of the closing time does not reach a predetermined value. The control circuit includes:
Performing a process of determining whether or not the door is held in the closed position based on an electrical state of the door switch when a drive power source is applied to a drive source of the door operation device;
When it is determined that the door is not held in the closed position, a process of measuring the application time of the drive power is performed,
The refrigerator according to claim 1, wherein when determining that the measurement result of the application time has reached a predetermined value, a process of cutting off the driving power is performed.

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