JP2009063180A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely notify the invalidation of a left door button to a user. <P>SOLUTION: When the temperature of a solenoid 26 of a left door operation device 25 is not abnormally raised, the left door operation device 25 is actuated based on the operation of the left door button by the user to movingly operate a left door 7 forward from the closed state. When the temperature of a solenoid 26 of a left door operation device 25 is abnormally raised, a buzzer outputs sound to the user to notify that the left door operation device 25 is not actuated even by the operation of the left door button. This constitution can notify the invalidation of the left door button to the user despite having no display on the front face of the left door 7. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a refrigerator provided with a door operation device that moves a door of a storage room forward from a closed state in which a front surface of the storage room is closed.

When the operation element is operated to the refrigerator, a drive power is applied to the solenoid coil of the electromagnetic solenoid, and the door is pushed forward from the closed state based on the operation of moving the plunger of the electromagnetic solenoid from the rear to the front. There are things. In this configuration, it is estimated whether or not the electromagnetic solenoid is abnormally heated, and when it is estimated that the electromagnetic solenoid is abnormally heated, the solenoid coil is applied even when the operation element is operated. The operation element is invalidated by not applying the drive power.
JP 2001-82867 A

  In the case of the refrigerator described above, an indicator is provided on the door so that it can be visually recognized from the front. When it is estimated that the electromagnetic solenoid is abnormally heated, an operation is performed by displaying an abnormal message on the indicator. The user is informed that the child is invalidated. However, if the door is not provided with an indicator, the user cannot be notified that the operating element has been invalidated, and the user may be mistaken for a malfunction.

  The present invention has been made in view of the above circumstances, and its purpose is a refrigerator capable of notifying the user that the operating element has been invalidated even when the display is not provided on the door. Is to provide.

  The refrigerator according to claim 1 is a box-shaped cabinet whose front surface is open, a storage space which is provided inside the cabinet and has a front surface which is open, and which is supplied with cold air. A door provided movably between a closed state in which the front surface is closed and an open state in which the front surface of the storage chamber is opened, an operating element that can be operated from the front by the user, and the operating element is operated. An electrical drive source for moving the door forward from the closed state based on the switch operating in the closed state of the door, and a switch whose electrical state changes depending on whether or not A door operating device, a sound output device that outputs a sound to a user, and a drive source for operating the door device, and whether or not the drive source for the door operating device is abnormally heated. Processing to determine and before A control circuit that performs each of the processes for determining whether or not the operation element has been operated based on the electrical state of the switch, and the control circuit has a drive source of the door operation device that is not abnormally heated Is determined to operate the drive source of the door operating device based on detecting that the operating element has been operated, and to determine that the drive source of the door operating device is abnormally heated. When the operation element is operated, a process for not operating the drive source of the door operation device is performed, and when it is determined that the drive source of the door operation device is abnormally heated The present invention is characterized in that a process for notifying the user that the drive source of the door operating device is in an operation prohibited state based on outputting sound from the sound output device is performed.

  The refrigerator according to claim 2 is a box-shaped cabinet whose front surface is open, a first storage room which is provided inside the cabinet and has a space shape whose front surface is open and to which cold air is supplied, and A second storage chamber which is provided in the interior of the cabinet and has a front surface open to which cold air is supplied; a closed state in which the front surface of the first storage chamber is closed; and the first storage chamber A first door movably provided between the open states that open the front of the first door, a closed state that closes the front of the first storage chamber, and an open state that opens the front of the first storage chamber And a second door movably provided between a closed state in which the front of the second storage chamber is closed and an open state in which the front of the second storage chamber is opened, and a user operates from the front The first operator that can , A first switch whose electrical state changes mutually depending on whether or not the first operator is operated, a second operator that can be operated from the front by the user, A second switch whose electrical state changes with each other depending on whether or not the second operator is operated, and the first door based on operating in a closed state of the first door. A first door operating device that operates to move forward from the closed state and has an electric drive source, and the second door is closed based on operating in the closed state of the second door A second door operating device having an electric drive source, which can be moved forward from the front, and can be visually recognized from the front provided in the first storage chamber when the first door is open. Display, a drive source for operating the first door device, and the second Each of the door device operation drive sources is controlled to determine whether or not the first door operation device drive source is abnormally heated, and the second door operation device drive source. A process for determining whether the temperature of the first switch is abnormally high, a process for determining whether the first operating element is operated based on the electrical state of the first switch, and the second switch A control circuit that performs each of the processes for determining whether or not the second operation element has been operated based on an electrical state, and the control circuit includes an abnormal temperature rise in the drive source of the first door operation device; When it is determined that the first operating element is not operated, the drive source of the first door operating device is activated based on detecting that the first operating element is operated. When judging that the drive source is abnormally heated Performs a process of not operating the drive source of the first door operation device even when the first operator is operated, and determines that the drive source of the second door operation device is not abnormally heated. The drive source of the second door operation device is activated based on detecting that the second operation element has been operated, and the drive source of the second door operation device is abnormally heated. When the second operating element is operated, a process for not operating the driving source of the second door operating device is performed, and the driving source of the second door operating device rises abnormally. An operation in which the drive source of the second door operation device does not operate on the display unit, provided that the drive source of the first door operation device is not abnormally heated when it is determined that the temperature is high A process for displaying the prohibition state and the first Having said first door based on operating the drive source of the restore operation device from the closed state where performing each process operating forward.

1. Description of action and effect of refrigerator according to claim 1 When the drive source of the door operating device is not abnormally heated, the door operating device is activated based on the operation of the operator by the user, and the door is closed. Move forward. When the drive source of the door operation device is abnormally heated, a sound is output from the output device to the user, and the user is notified by sound that the door operation device does not operate even if the operation element is operated. For this reason, even if it is a case where the indicator is not provided in the door, it can alert | report that the operation element is invalidated to the user.
2. Description of operation and effect of refrigerator according to claim 2 When the drive source of the first door operation device is not abnormally heated, the first door operation device is based on the fact that the user operates the first operation element. Is activated to move the first door forward from the closed state. When the drive source of the second door operation device is not abnormally heated, the second door operation device is activated based on the user operating the second operation element, and the second door is moved from the closed state. Move forward. When the drive source of the second door operation device is abnormally heated, the abnormality of the second door operation device is displayed on the display on the condition that the drive source of the first door operation device is not abnormally heated. The first door is operated forward from the closed state based on the activation of the drive source of the first door operation device. For this reason, since the display content of the display device can be visually recognized, even if the display device is not provided for each of the first door and the second door, the user can use the second operator. Can be notified that is invalidated.

[Example 1]
The cabinet 1 is comprised from the outer box 2, the inner box 3, and the heat insulating material 4 (refer FIG. 2), as shown in FIG. 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. As shown in FIG. 2, the heat insulating material 4 is stored in the space between the two bottom plates to the space between the two rear plates so that a space is formed between each of them. Each of them is filled.

  As shown in FIG. 1, a horizontal heat insulating partition wall 5 is fixed inside the cabinet 1. The heat insulating partition wall 5 is configured by storing a solid heat insulating material such as polystyrene foam in a hollow case, and is located above the heat insulating partition wall 5 in the inside of the cabinet 1. 6 is formed. The refrigerator compartment 6 refers to a space portion whose front surface is open, and corresponds to a storage compartment and a first storage compartment. A cold air outlet is fixed to the rear wall of the cold storage room 6, and food can be stored in the cold room 6 based on the fact that the cold air is supplied from the cold air outlet. Controlled by temperature range.

  As shown in FIG. 1, a left door 7 and a right door 8 are mounted on the cabinet 1 in front of the refrigerator compartment 6. The left door 7 is configured to be rotatable about a vertical axis 9 between a closed state in which the left half of the front surface of the refrigerator compartment 6 is closed and an open state in which the left half is opened. It corresponds to each of the second doors. The right door 8 is configured to be rotatable about a vertical axis 10 between a closed state in which the right half of the front side of the refrigerator compartment 6 is closed and an open state in which the right half is opened. It corresponds to each of the first doors. A rubber gasket 11 is fixed to the rear surfaces of the left door 7 and the right door 8, as shown in FIG. The gasket 11 of the left door 7 has a frame shape surrounding the left door 7, and comes into contact with the chamber wall of the refrigerator compartment 6 from the front when the left door 7 is closed. The gasket 11 of the right door 8 has a frame shape surrounding the right door 8, and comes into contact with the chamber wall of the refrigerator compartment 6 from the front when the right door 8 is closed.

  As shown in FIG. 1, a refrigeration area is formed inside the cabinet 1 so as to be positioned below the heat insulating partition wall 5. This freezing area refers to a space part whose front surface is open, and a front plate 12 is fixed to the cabinet 1 as shown in FIG. The front plate 12 has a vertical plate shape extending in the left-right direction. A front frame 13 extending in the left-right direction along the front plate 12 is fixed to the rear surface of the front plate 12, and the inside of the freezing area is shown in FIG. As shown in FIG. 2, the lower freezing chamber 14 below the front frame 13, the ice making chamber 15 at the upper left of the front frame 13, and the upper freezing chamber 16 at the upper right of the front frame 13 are divided. As shown in FIG. 3, cold air outlets 17 are fixed on the respective rear walls of the lower freezing chamber 14, the ice making chamber 15, and the upper freezing chamber 16. Each of the ice making chamber 15 and the upper freezing chamber 16 is controlled to a temperature range in which food can be stored frozen based on the supply of cold air from the cold air outlet 17. The lower freezer compartment 14 corresponds to each of a storage room and a second storage room.

  As shown in FIG. 1, the cabinet 1 is provided with a lower slide door 18 located in front of the lower freezer compartment 14, and the rear surface of the lower slide door 18 has a lower slide as shown in FIG. A frame-shaped bead 19 surrounding the door 18 is formed. The lower slide door 18 corresponds to each of the door and the second door, and is moved forward and backward between a closed state in which the front surface of the lower freezer compartment 14 is closed and an open state in which the front surface of the lower freezer compartment 14 is opened. It can be moved linearly. As shown in FIG. 1, the cabinet 1 has a left slide door 20 mounted in front of the ice making chamber 15 and a right slide door 21 mounted in front of the upper freezing chamber 16. Each of the left slide door 20 and the right slide door 21 is linearly movable in the front-rear direction, and the left slide door 20 is linearly moved in the front-rear direction on the front surface of the ice making chamber 15. And the front surface of the upper freezer compartment 16 is opened and closed based on the right sliding door 21 being linearly moved in the front-rear direction.

  As shown in FIG. 3, rubber gaskets 22 are fixed to the rear surfaces of the lower slide door 18, the left slide door 20, and the right slide door 21, respectively. The gasket 22 of the lower slide door 18 has a frame shape surrounding the lower slide door 18, and comes into contact with the chamber wall of the lower freezer compartment 14 from the front when the lower slide door 18 is closed. The gasket 22 of the left slide door 20 has a frame shape surrounding the left slide door 20, and comes into contact with the chamber wall of the ice making chamber 15 from the front when the left slide door 20 is closed. The gasket 22 of the right slide door 21 has a frame shape surrounding the right slide door 21, and comes into contact with the chamber wall of the upper freezer compartment 16 from the front when the right slide door 21 is closed.

  As shown in FIG. 1, a recess 23 is formed on the upper surface of the cabinet 1 so as to be located behind the left door 7. As shown in FIG. 2, the concave portion 23 has an upper surface opened, and the upper surface of the concave portion 23 is closed based on the cover 24 being attached to the upper surface of the cabinet 1. The recess 23 accommodates a left door operation device 25 corresponding to each of the door operation device and the second door operation device, and the left door operation device 25 is covered with a cover 24 so as not to be visually recognizable. Yes. The left door operation device 25 uses an electromagnetic solenoid 26 as a drive source, and is configured as follows.

  As shown in FIG. 2, the electromagnetic solenoid 26 is housed in the recess 23 and includes a solenoid coil 27 and a plunger 28. The solenoid coil 27 has a cylindrical shape whose front and rear surfaces are open, and the plunger 28 is inserted into the solenoid coil 27 so as to be linearly movable in the front-rear direction. The plunger 28 has a cylindrical shape extending in the front-rear direction, and a stopper 29 is fixed in the recess 23 at the rear of the plunger 28.

  As shown in FIG. 2, a collar portion 30 is fixed to the rear end portion of the plunger 28. The flange 30 has a disk shape with a larger diameter than the plunger 28, and a return spring 31 is inserted on the outer peripheral surface of the plunger 28 between the flange 30 and the solenoid coil 27. Yes. The return spring 31 is composed of a compression coil spring, and the plunger 28 is operated by the spring force of the return spring 31 in the retracted position where the rear end of the plunger 28 contacts the stopper 29 when the solenoid coil 27 is in an off state. The coil 27 is operated against the spring force of the return spring 31 at a forward position where the wires of the return spring 31 are in contact with each other.

  A rod 32 extending in the front-rear direction is fixed to the plunger 28 as shown in FIG. The rod 32 has a cylindrical shape concentric with the plunger 28, and a cylindrical pusher 33 is fixed to the front end portion of the rod 32. The pusher 33 is operated to the retracted position via the plunger 28 when the solenoid coil 27 is off, and the pusher 33 faces the rear surface of the left door 7 through a gap at the retracted position of the pusher 33. The pusher 33 is operated to the forward position through the plunger 28 when the solenoid coil 27 is on. When the pusher 33 moves from the reverse position to the forward position with the left door 7 closed, the rear surface of the left door 7 is moved. The left door 8 is operated to rotate forward from the closed state based on pressing from the rear toward the front. The left door operation device 25 is configured as described above.

  As shown in FIG. 1, a recess 23 is formed on the upper surface of the cabinet 1 behind the right door 8, and the upper surface of the recess 23 is closed by a cover 24. In the recess 23, a right door operation device 34 (see FIG. 2) corresponding to each of the door operation device and the first door operation device is housed. As shown in FIG. 2, the right door operation device 34 includes an electromagnetic solenoid 26, a stopper 29, a flange 30, a return spring 31, a rod 32, and a pusher 33. The pusher 33 of the right door operation device 34 is The solenoid coil 27 is operated to the retracted position via the plunger 28 when the solenoid coil 27 is in an off state, and is operated to the forward position via the plunger 28 when the solenoid coil 27 is on. The pusher 33 of the right door operation device 34 is opposed to the rear surface of the right door 8 through a gap at the retracted position, and the pusher 33 of the right door operation device 34 is moved from the retracted position to the forward position when the right door 8 is closed. When the right door 8 is moved, the right door 8 is rotated forward from the closed state based on pressing the rear surface of the right door 8 from the rear to the front.

  As shown in FIG. 3, a horizontal plate-like base 35 is fixed to the front frame 13, and the base 35 has a lower slide door operation device corresponding to each of the door operation device and the second door operation device. 36 is fixed. The lower slide door operation device 36 uses an electromagnetic solenoid 37 as a drive source, and is configured as follows. A box 38 is fixed to the base 35, and an electromagnetic solenoid 37 is accommodated inside the box 38. The electromagnetic solenoid 37 has a solenoid coil 39 and a plunger 40, and the solenoid coil 39 has a cylindrical shape in which each of a front surface and a rear surface is opened. The plunger 40 is inserted into the solenoid coil 39 so as to be linearly movable in the front-rear direction, and has a cylindrical shape extending in the front-rear direction.

  As shown in FIG. 3, a collar portion 41 is fixed to the rear end portion of the plunger 40. The flange 41 has a disk shape having a diameter larger than that of the plunger 40, and a return spring 42 is inserted between the flange 41 and the solenoid coil 39 on the outer peripheral surface of the plunger 40. Yes. The return spring 42 is composed of a compression coil spring. The plunger 40 is operated by the spring force of the return spring 42 in the retracted position where the rear end of the plunger 40 contacts the rear plate of the box 38 with the solenoid coil 39 in the off state. Then, the solenoid coil 39 is operated against the spring force of the return spring 42 at the forward position where the wires of the return spring 42 are in contact with each other.

  As shown in FIG. 3, a rod 43 extending in the front-rear direction is fixed to the plunger 40. The rod 43 has a cylindrical shape concentric with the plunger 40, and the rear end of the arm 44 is fixed to the front end of the rod 43. A vertical plate-like pusher 45 is bent at the front end of the arm 44. The pusher 45 is operated to the retracted position via the plunger 40 when the solenoid coil 39 is off. When the pusher 45 is retracted, the pusher 45 faces the rear surface of the bead 19 of the lower slide door 18 via a gap. To do. The pusher 45 is operated to the forward position through the plunger 40 when the solenoid coil 39 is on. When the pusher 45 moves from the reverse position to the forward position with the lower slide door 18 closed, the rear surface of the bead 19 is moved. The lower slide door 18 is operated to move forward from the closed state based on the pressing from the rear toward the front. The lower slide door operation device 36 is configured as described above.

  As shown in FIG. 4, a control circuit 46 mainly composed of a microcomputer is housed in the cabinet 1. The control circuit 46 includes a CPU, a ROM, and a RAM. The control circuit 46 operates the left door 7 forward from the closed state based on driving control of the solenoid coil 27 of the left door operation device 25, and the right door operation device 34. The right door 8 is operated forward from the closed state based on the drive control of the solenoid coil 27, and the lower slide door 18 is moved from the closed state based on the drive control of the solenoid coil 39 of the lower slide door operation device 36. Operate forward. The control circuit 46 is connected to a temperature sensor 47 made up of a thermistor. The temperature sensor 47 is mounted on the surface of the cabinet 1, and the CPU of the control circuit 46 detects the room temperature, which is the temperature in the room where the cabinet 1 is installed, based on the temperature signal output from the temperature sensor 47. To do.

  As shown in FIG. 4, a buzzer 48 is connected to the control circuit 46. The buzzer 48 corresponds to an output device, and is attached to the rear plate of the outer box 1 as shown in FIG. A net-like cover is fixed to the rear plate of the outer box 1 behind the buzzer 48, and sound is output to the outside of the outer box 1 through the cover when the buzzer 48 is operated. A display 49 is connected to the control circuit 46 as shown in FIG. As shown in FIG. 1, the display device 49 is fixed to the right side wall of the refrigerator compartment 6, and the display content of the display device 49 is visually visible when the left door 7 and the right door 8 are closed. When the right door 8 is opened, the display content of the display unit 49 can be visually recognized. The display 49 is a liquid crystal display, and the control circuit 46 displays operation information such as the temperature inside the refrigerator compartment 6 on the display 49.

  As shown in FIG. 1, the left door button 50 is attached to the left door 7, the right door button 51 is attached to the right door 8, and the lower slide door button 52 is attached to the lower slide door 18. . Each of the left door button 50, the right door button 51, and the lower slide door button 52 can be operated from the front by the user, and linearly extends in the front-rear direction between the initial position and the pushing position behind the initial position. It has been made movable. Each of the left door button 50, the right door button 51, and the lower slide door button 52 corresponds to an operator, and each of the left door button 50 and the lower slide door button 52 corresponds to a second operator. The right door button 51 corresponds to a first operator.

  As shown in FIG. 4, a left door opening switch 53, a right door opening switch 54, and a lower slide door opening switch 55 are connected to the control circuit 46. The left door release switch 53 is turned off when the left door button 50 is not operated to the pushed position, and is turned on when the left door button 50 is operated from the initial position to the pushed position. The right door release switch 54 is turned off when the right door button 51 is not operated to the pushed position, and is turned on when the right door button 51 is operated from the initial position to the pushed position. The lower slide door release switch 55 is turned off when the lower slide door button 52 is not operated to the pushed position, and is turned on when the lower slide door button 52 is operated from the initial position to the pushed position. The Each of the left door release switch 53, the right door release switch 54, and the lower slide door release switch 55 corresponds to a switch, and each of the left door release switch 53 and the lower slide door release switch 55 is a second switch. The right door opening switch 54 corresponds to a first switch.

  As shown in FIG. 4, a left door switch 56, a right door switch 57, and a lower slide door switch 58 are connected to the control circuit 46. The left door switch 56 is turned on when the left door 7 is operated in the closed state, and is turned off when the left door 7 is not operated in the closed state. The right door switch 57 is turned on when the right door 8 is operated in the closed state, and is turned off when the right door 8 is not operated in the closed state. The lower slide door switch 58 is turned on when the lower slide door 18 is operated in the closed state, and is turned off when the lower slide door 18 is not operated in the closed state.

  A control program is recorded in the ROM of the control circuit 46 in advance, and the CPU of the control circuit 46 has a solenoid coil 27 of the left door operation device 25, a solenoid coil 27 of the right door operation device 34, and a solenoid of the lower slide door operation device 36. Each of the coils 39 is driven and controlled based on a control program. Hereinafter, the processing content of the control circuit 46 is demonstrated based on each of FIGS.

  When the power is turned on, the CPU turns off the abnormal temperature rise flag Fl in step S1 of FIG. 5, turns off the abnormal temperature rise flag Fr in step S2, and turns off the abnormal temperature rise flag Fd in step S3. The abnormal temperature increase flag Fl indicates whether or not the electromagnetic solenoid 26 of the left door operation device 25 has abnormally increased temperature, and is turned off in a normal state where the electromagnetic solenoid 26 of the left door operation device 25 has not abnormally increased temperature. The electromagnetic solenoid 26 of the door operating device 25 is turned on in an abnormal state where the temperature is abnormally increased. The abnormal temperature increase flag Fr indicates whether or not the electromagnetic solenoid 26 of the right door operation device 34 has abnormally increased temperature, and is turned off in a normal state where the electromagnetic solenoid 26 of the right door operation device 34 has not abnormally increased temperature. The electromagnetic solenoid 26 of the door operating device 34 is turned on in an abnormal state where the temperature is abnormally high. The abnormal temperature increase flag Fd indicates whether or not the electromagnetic solenoid 37 of the lower slide door operation device 36 has an abnormal temperature increase, and is turned off in a normal state where the electromagnetic solenoid 37 of the lower slide door operation device 36 is not abnormally heated. The electromagnetic solenoid 37 of the lower slide door operation device 36 is turned on in an abnormal state where the temperature is abnormally increased.

  When the CPU turns off the abnormal temperature rise flag Fd in step S3, the CPU detects the room temperature based on the temperature signal output from the temperature sensor 47 in step S4, and the constant K previously recorded in the ROM in step S5 is the detection result of the room temperature. The point Po is initialized based on multiplying by. The constant K is set to “10”. For example, when the detection result at room temperature is “30 ° C.”, the point Po is initially set to “300 (= 10 × 30)”.

  When the point Po is initially set in step S5, the initial setting result of the point Po is set in the counter Nl in step S6, the initial setting result of the point Po is set in the counter Nr in step S7, and the point Po is set in step S8. The initial setting result is set in the counter Nd. The counter Nl is basic data for estimating whether the electromagnetic solenoid 26 of the left door operation device 25 is abnormally heated, and the counter Nr is whether the electromagnetic solenoid 26 of the right door operation device 34 is abnormally heated. The counter Nd is basic data for estimating whether or not the electromagnetic solenoid 37 of the lower slide door operation device 36 is abnormally heated.

  When the CPU initially sets the counter Nd in step S8, the CPU resets the timer T to “0” in step S9. The timer T starts timer interrupt processing at regular time intervals, and adds a unit value every time the timer interrupt processing is started. When the CPU resets the timer T in step S9, the left side of step S10. Shift to door opening process.

  FIG. 6 shows the details of the left door opening process, and the CPU determines whether or not the left door opening switch 53 is turned on in step S21. For example, when the user has not operated the left door button 50 to the pushing position, the CPU determines in step S5 that the left door opening switch 53 is not turned on, and proceeds to step S26.

  When the left door button 50 is operated to the pushing position, the CPU determines that the left door opening switch 53 is turned on in step S21, and determines whether or not the left door switch 56 is turned on in step S22. For example, when the left door 7 is not operated in the closed state, the CPU determines in step S22 that the left door switch 56 is not turned on, and proceeds to step S26.

  When the left door 7 is operated in the closed state, the CPU determines in step S22 that the left door switch 56 is turned on, and in step S23 determines whether or not the abnormal temperature increase flag Fl is turned off. For example, when the electromagnetic solenoid 26 of the left door operating device 25 is abnormally heated, the abnormal temperature increase flag Fl is turned on, and the CPU determines in step S23 that the abnormal temperature increase flag Fl is turned on, and the step. The process proceeds to S26.

  When the electromagnetic solenoid 26 of the left door operation device 25 is not abnormally heated, the CPU determines in step S23 that the abnormal temperature increase flag Fl is turned off, and in step S24, the CPU turns on the solenoid coil 27 of the left door operation device 25. Apply drive power. The application of the drive power is continuously performed for an on-time (for example, 0.5 sec) recorded in advance in the ROM, and the CPU applied the drive power to the solenoid coil 27 of the left door operating device 25 in step S24. Sometimes the process proceeds to step S25, and a unit value (for example, 4) recorded in advance in the ROM is added to the counter Nl. That is, when the user operates the left door button 50 to the pushing position while the electromagnetic solenoid 26 of the left door operation device 25 is not abnormally heated and the left door 7 is operated in the closed state, the left door The solenoid coil 27 of the operating device 25 is turned on, and the left door 7 is operated forward from the closed state.

  In step S26, the CPU compares the addition result of the timer T with a limit time (for example, 3 hours) recorded in advance in the ROM. When it is determined that the addition result of the timer T has not reached the limit time, the process proceeds to step S27, and the measurement result of the counter Nl is compared with an abnormality determination value (for example, 1000). This abnormality determination value is recorded in advance in the ROM of the control circuit 46, and when the CPU determines “Nl <1000” in step S27, it proceeds to step S32 and turns off the abnormal temperature increase flag Fl. Then, it is recorded that the electromagnetic solenoid 26 of the left door operating device 25 is not abnormally heated. Then, the process proceeds to step S33, and the buzzer 48 is turned off.

  When the buzzer 48 is turned off in step S33, the CPU compares the addition result of the timer T with a unit time “60 sec × N (N is a natural number)” recorded in advance in the ROM in step S34. When it is determined that “T = 60 sec × N”, the process proceeds to step S35, and the measurement result of the counter Nl is compared with a threshold value (for example, 800) recorded in advance in the ROM. When “Nl ≧ 800” is determined here, the process proceeds to step S36, and a unit value (for example, 10) is subtracted from the measurement result of the counter Nl. This unit value is recorded in advance in the ROM of the control circuit 46. When the CPU determines “Nl <800” in step S35, the process proceeds to step S37, and is recorded in advance in the ROM from the measurement result of the counter Nl. The unit value (eg 3) is subtracted. That is, when the electromagnetic solenoid 26 of the left door operating device 25 is not abnormally heated, the current temperature level of the electromagnetic solenoid 26 of the left door operating device 25 is the measurement result of the counter Nl every unit time (60 seconds). The unit value “10” is subtracted from the measurement result of the counter Nl when the determination result of the current temperature is high, and the unit value “3” is subtracted from the measurement result of the counter Nl when the determination result of the current temperature is low. Is done.

  When the pushing operation of the left door button 50 is repeated with the left door 7 closed, the measurement result of the counter Nl reaches the abnormality determination value (1000). In this case, the CPU determines “Nl ≧ 1000” in step S27, and the electromagnetic solenoid 26 of the left door operating device 25 is abnormally heated based on turning on the abnormal temperature increase flag Fl in step S28. And the buzzer 48 is turned on in step S29. The buzzer 48 is turned on by the dedicated pattern Pl of the left door operating device 25 recorded in advance in the ROM of the control circuit 46, and the user can output the sound with the dedicated pattern Pl from the buzzer 48. When the left door button 50 is operated, it is determined in step S23 that the abnormal temperature increase flag Fl is turned on, so that drive power is not applied to the solenoid coil 27 of the left door operation device 25. In other words, the buzzer 48 notifies the user that the left door operation device 25 is in an operation prohibited state.

  When the operation of the left door operating device 25 is prohibited, the CPU determines “Nl ≧ 1000” in step S27. In this case, the process proceeds from step S28 to step S29 to step S30, and the addition result of the timer T is compared with the unit time “60 sec × N (N is a natural number)”. If it is determined that “T = 60 sec × N”, the process proceeds to step S31, and a unit value (for example, 10) recorded in advance in the ROM is subtracted from the measurement result of the counter Nl. When the subtraction result of the counter Nl falls below the abnormality determination value, it is determined that “Nl ≧ 1000” is not satisfied in step S27, and the left door operation device 25 is determined based on turning off the abnormal temperature increase flag Fl in step S32. And the user is notified that the operation prohibition of the left door operation device 25 has been canceled based on turning off the buzzer 48 in step S33.

  When the CPU determines that the addition result of the timer T has reached the limit time in step S26, the CPU detects the room temperature based on the temperature signal output from the temperature sensor 47 in step S38. In step S39, the point Po is calculated again based on multiplying the room temperature detection result by the constant k. In step S40, the calculation result of the point Po is compared with the measurement result of the counter Nl. When it is determined that “Nl ≦ Po”, the calculation result of the point Po is set in the counter Nl in step S41, and when it is determined that “Nl> Po”, the measurement result of the counter Nl is included in the measurement result of the point Po. Do not set the calculation result. That is, when the calculation result of the point Po is less than or equal to the measurement result of the counter Nl, the counter Nl is added or subtracted again based on the calculation result of the point Po. When the calculation result of the point Po exceeds the measurement result of the counter Nl, the counter Nl is Addition and subtraction are performed again based on the measurement result.

  When the CPU completes the left door opening process in step S10 in FIG. 5, the CPU proceeds to the right door opening process in step S11. FIG. 7 shows details of the right door opening process, and the CPU determines that the right door opening switch 54 is not turned on in step S51 when the right door button 51 is not operated to the pushing position. In S56, it is determined that the measurement result of the timer T has not reached the limit time (3 hours), and in Step S57, the measurement result of the counter Nr is compared with the abnormality determination value (1000). For example, when the electromagnetic solenoid 26 of the right door operating device 34 is not abnormally heated, “Nr <1000” is determined in step S57, the abnormal temperature increase flag Fr is turned off in step S62, and the buzzer 48 is turned off in step S63. In step S64, it is determined whether a unit time (60 seconds) has elapsed. When it is determined in step S64 that the unit time has elapsed, the measurement result of the counter Nr is compared with the threshold value (800) in step S65, and when “Nr ≧ 800” is determined, the unit is determined from the measurement result of the counter Nr in step S66. When the value (10) is subtracted and “Nr <800” is determined, the unit value (3) is subtracted from the measurement result of the counter Nr in step S67.

  When the user operates the right door button 51 to the push-in position while the right door 8 is operated in the closed state without the electromagnetic solenoid 26 of the right door operating device 34 being abnormally heated, the CPU executes the right operation in step S51. It is detected that the door opening switch 54 is turned on. In step S52, it is determined that the right door switch 57 is turned on. In step S53, it is determined that the abnormal temperature increase flag Fr is turned off. Then, the right door 8 is turned forward from the closed state based on turning on the solenoid coil 27 of the right door operating device 34 in step S54, and the unit value (4) is added to the measurement result of the counter Nr in step S55. to add. When the pushing operation of the right door button 51 is repeated, the CPU determines “Nr ≧ 1000” in step S57, turns on the abnormal temperature increase flag Fr in step S58, and turns on the right door device 34 from the buzzer 48 in step S59. Sound is output with the dedicated pattern Pr. When the user operates the right door button 51 to the pushed-in position while the buzzer 48 is operating, it is determined in step S53 that the abnormal temperature rise flag Fr is turned on. The operation of the right door button 51 is invalidated without being applied.

  The CPU subtracts the unit value (10) from the measurement result of the counter Nr in step S61 every time it determines that the unit time (60 seconds) has elapsed in step S60 when the abnormal temperature increase flag Fr is on. The measurement result of Nr falls as time passes. When the measurement result of the counter Nr falls below the abnormality determination value, the CPU determines “Nr <1000” in step S57, and proceeds to step S62. Here, the operation prohibition state of the right door operation device 34 is canceled based on turning off the abnormal temperature increase flag Fr, and the operation prohibition state of the right door operation device 34 is canceled based on turning off the buzzer 48 in step S63. The user is informed that this has been done.

  When the CPU determines that the addition result of the timer T has reached the limit time in step S56, the CPU compares the calculation result of the point Po with the measurement result of the counter Nr in step S68. This point Po is calculated by the CPU in step S39 of the left door opening process of FIG. 6, and when the CPU determines “Nr ≦ Po” in step S68 of FIG. 7, the point Po is calculated in the counter Nr in step S69. When the result is set and “Nr> Po” is determined, the calculation result of the point Po is not set in the measurement result of the counter Nr.

  When the CPU completes the right door opening process in step S11 in FIG. 5, the CPU proceeds to the lower slide door opening process in step S12. FIG. 8 shows details of the lower slide door opening process, and the CPU determines that the lower slide door opening switch 55 is not turned on in step S71 when the lower slide door button 52 is not operated to the pushing position. In step S76, it is determined that the measurement result of the timer T has not reached the limit time. In step S77, the measurement result of the counter Nd is compared with the abnormality determination value. For example, when the electromagnetic solenoid 37 of the lower slide door operation device 36 is not abnormally heated, “Nd <1000” is determined in step S77, the abnormal temperature increase flag Fd is turned off in step S82, and the buzzer 48 is turned on in step S83. In step S84, it is determined whether a unit time has elapsed. When it is determined in step S84 that the unit time has elapsed, the measurement result of the counter Nd is compared with a threshold value in step S85, and when “Nd ≧ 800” is determined, the unit value is subtracted from the measurement result of the counter Nd in step S86. When “Nd <800” is determined, another unit value is subtracted from the measurement result of the counter Nd in step S87.

  When the electromagnetic solenoid 37 of the lower slide door operation device 36 is not abnormally heated and the lower slide door 18 is operated in the closed state and the user operates the lower slide door button 52 to the pushing position, the CPU performs a step. In step S71, it is detected that the lower slide door opening switch 55 is turned on. In step S72, it is determined that the lower slide door switch 58 is turned on. In step S73, it is determined that the abnormal temperature increase flag Fd is turned off. In step S74, the lower slide door 18 is moved forward from the closed state based on turning on the solenoid coil 39 of the lower slide door operation device 36. In step S75, the unit value is added to the measurement result of the counter Nd. . When the pressing operation of the lower slide door button 52 is repeated, the CPU determines “Nd ≧ 1000” in step S77, turns on the abnormal temperature increase flag Fd in step S78, and operates the lower slide door from the buzzer 48 in step S79. Sound is output with the dedicated pattern Pd of the device 36. When the user operates the lower slide door button 52 to the pushed-in position while the buzzer 48 is in operation, it is determined in step S73 that the abnormal temperature increase flag Fd is turned on, so that the solenoid coil 39 of the lower slide door operation device 36 is driven. The operation of the lower slide door button 52 is invalidated without applying power.

  The CPU subtracts the unit value from the measurement result of the counter Nd in step S81 every time it determines that the unit time has elapsed in step S80 when the abnormal temperature increase flag Fd is on, and the measurement result of the counter Nd It descends as time passes. When the measurement result of the counter Nd falls below the abnormality determination value, the CPU determines “Nd <1000” in step S77, and proceeds to step S82. Here, the operation prohibition state of the lower slide door operation device 36 is canceled based on turning off the abnormal temperature increase flag Fd, and the operation prohibition state of the lower slide door operation device 36 based on turning off the buzzer 48 in step S83. Informs the user that has been released.

  When the CPU determines that the addition result of the timer T has reached the limit time in step S76, the CPU compares the calculation result of the point Po with the measurement result of the counter Nd in step S88. This point Po is calculated by the CPU in step S39 of the left door opening process of FIG. 6, and when the CPU determines “Nd ≦ Po” in step S88 of FIG. 8, the point Po is calculated in the counter Nd in step S89. When the result is set and “Nd> Po” is determined, the calculation result of the point Po is not set in the measurement result of the counter Nd. In any case, the timer T is reset to “0” in step S90.

According to the said Example 1, there exists the following effect.
When the electromagnetic solenoid 26 of the left door operation device 25 is not abnormally heated, the user operates the left door operation device 25 based on the operation of the left door button 50 and moves the left door 7 forward from the closed state. Operated. When the electromagnetic solenoid 26 of the left door operation device 25 is abnormally heated, a sound is output from the buzzer 48 to the user, and it is sounded that the left door operation device 25 does not operate even if the left door button 50 is operated. Informed. For this reason, even if the left door 7, the right door 8, the lower slide door 18, the left slide door 20, and the right slide door 21 are not provided with indicators, the user disables the left door button 50. Can be informed. This effect is the same for each of the right door button 51 and the lower slide door button 52.
[Example 2]
FIG. 9 shows the left door opening process executed by the CPU of the control circuit 46 in place of the left door opening process of FIG. 6, and the CPU is abnormal in step S28 when the counter Nl has reached the abnormality determination value. The temperature raising flag Fl is turned on, the buzzer 48 is sounded with the dedicated pattern Pl in step S29, and it is determined whether or not the abnormal temperature raising flag Fr is turned off in step S42. For example, when the electromagnetic solenoid 26 of the right door operation device 34 is not abnormally heated, it is determined in step S42 that the abnormal temperature increase flag Fr is turned off, and whether the right door switch 57 is turned on in step S43. Determine whether.

  When the right door 8 is operated in the closed state, the CPU determines that the right door switch 57 is turned on in step S43, and applies drive power to the solenoid coil 27 of the right door operating device 34 in step S44. Then, the process proceeds to step S45, and the left door operation device 25 is in an operation-inhibited state based on displaying an error message “The left door button cannot be operated. Please operate the left door manually” on the display unit 49. Inform you. That is, when the electromagnetic solenoid 26 of the left door operation device 25 abnormally increases in temperature, the display unit 49 is opened in a visually recognizable manner based on the fact that the right door 8 is forcibly operated forward from the closed state. The user is notified using the display device 49 that the door button 50 is invalidated. This forcible operation of the right door 8 is executed on condition that the electromagnetic solenoid 26 of the right door operating device 34 has not abnormally heated up. The electromagnetic solenoid 26 of the right door operating device 34 has abnormally heated up. When the user is in the position, the forced operation of the right door 8 and the display of the abnormal message are not executed.

  When the CPU determines in step S27 that the measurement result of the counter Nl has decreased below the abnormality determination value, the CPU turns off the abnormal temperature increase flag Fl in step S32 and turns off the buzzer 48 in step S33. Then, the process proceeds to step S46, and the error message “The left door button cannot be operated. Please operate the left door manually” is deleted from the display unit 49.

  FIG. 10 shows a lower slide door opening process executed by the CPU of the control circuit 46 in place of the lower slide door opening process of FIG. 8, and the CPU performs step S78 when the counter Nd has reached the abnormality determination value. In step S79, the abnormal temperature rise flag Fd is turned on. In step S79, the buzzer 48 is sounded with the dedicated pattern Pd. In step S91, it is determined whether or not the abnormal temperature rise flag Fr is turned off. For example, when the electromagnetic solenoid 26 of the right door operating device 34 is not abnormally heated, it is determined in step S91 that the abnormal temperature increase flag Fr is turned off, and whether the right door switch 57 is turned on in step S92. Determine whether.

  When the right door 8 is operated in the closed state, the CPU determines that the right door switch 57 is turned on in step S92, and applies drive power to the solenoid coil 27 of the right door operating device 34 in step S93. Then, the process proceeds to step S94, and the operation of the lower slide door operating device 36 is prohibited based on the display of the error message “The lower slide door button cannot be operated. Please operate the lower slide door manually.” Announce that it is in a state. That is, when the electromagnetic solenoid 37 of the lower slide door operation device 36 is abnormally heated, the display 49 is opened so as to be visually recognizable based on the right door 8 being forcibly operated forward from the closed state. The user is notified by the display content of the display 49 that the lower slide door button 52 is disabled. This forcible operation of the right door 8 is executed on condition that the electromagnetic solenoid 26 of the right door operating device 34 has not abnormally heated up. The electromagnetic solenoid 26 of the right door operating device 34 has abnormally heated up. When the user is in the position, the forced operation of the right door 8 and the display of the abnormal message are not executed.

  When the CPU determines that the measurement result of the counter Nd has decreased below the abnormality determination value in step S77, the CPU turns off the abnormal temperature increase flag Fd in step S82 and turns off the buzzer 48 in step S83. Then, the process proceeds to step S95, and the error message “The lower slide door button cannot be operated. Please operate the lower slide door manually” is deleted from the display unit 49.

According to the said Example 2, there exist the following effects.
When the electromagnetic solenoid 26 of the left door operation device 25 is abnormally heated, an error message “The left door button cannot be operated” is displayed on the condition that the electromagnetic solenoid 26 of the right door operation device 34 is not abnormally heated. "Please operate the left door manually." Is displayed, and the right door 8 is operated forward from the closed state based on operating the right door operating device 34. For this reason, since the display content of the display device 49 can be visually recognized, a display device is provided for each of the left door 7, the right door 8, the lower slide door 18, the left slide door 20, and the right slide door 21. Even if it is not, the user can be informed that the left door button 50 has been disabled. This effect is the same for the lower slide door 18.

  In each of the first to second embodiments, a speaker corresponding to an output device may be used instead of the buzzer 48. In this configuration, when the electromagnetic solenoid 26 of the left door operation device 25 is abnormally heated, a sound such as “The left door button cannot be operated. Please operate the left door manually” is output from the speaker. When the electromagnetic solenoid 26 of the door operation device 34 is abnormally heated, a sound such as “The right door button cannot be operated. Please operate the right door manually” is output from the speaker, and the lower slide door operation device 36 When the electromagnetic solenoid 37 is abnormally heated, it is preferable to output a sound such as “The lower slide door button cannot be operated. Please operate the lower slide door manually”.

  In each of the first to second embodiments, a buzzer 48 or a speaker may be attached to any one of the left door 7, the right door 8, the lower slide door 18, the left slide door 20, and the right slide door 21.

The figure which shows Example 1 of this invention (The figure which shows the external appearance of a refrigerator) Sectional drawing which shows each of left door operation device and right door operation device Sectional view showing the lower slide door operation device Block diagram showing electrical configuration Flow chart showing processing contents of control circuit Flow chart showing left door opening process of control circuit Flow chart showing right door opening process of control circuit Flow chart showing lower slide door opening process of control circuit Example 2 of the present invention is shown (corresponding to FIG. 6). Equivalent to FIG.

Explanation of symbols

  1 is a cabinet, 6 is a refrigerator compartment (storage room, first storage room), 7 is a left door (door, second door), 8 is a right door (door, first door), and 14 is a lower freezer room (Storage chamber, second storage chamber), 18 is a lower slide door (door, second door), 25 is a left door operation device (door operation device, second door operation device), and 26 is an electromagnetic solenoid (drive) ), 34 is a right door operation device (door operation device, first door operation device), 36 is a lower slide door operation device (door operation device, second door operation device), and 37 is an electromagnetic solenoid (drive source). , 46 is a control circuit, 48 is a buzzer (sound generator), 49 is a display, 50 is a left door button (operator, second operator), 51 is a right door button (operator, first operator). ), 52 is a lower slide door button (operator, second operator), 53 is a left door release switch ( Switch, the second switch), 54 the right door opening switch (switch, a first switch), 55 denotes a lower sliding door open switch (switch, a second switch).

Claims (2)

A box-shaped cabinet with an open front,
A storage room that is provided inside the cabinet and has a space shape with an open front surface, to which cold air is supplied,
A door movably provided between a closed state for closing the front surface of the storage chamber and an open state for opening the front surface of the storage chamber;
An operator that can be operated from the front by the user;
A switch whose electrical state changes mutually depending on whether or not the operation element is operated;
A door operating device that operates to move the door forward from the closed state based on operating in the closed state of the door, and has an electrical drive source;
A sound output device that outputs sound to the user;
Controlling the drive source of the door device operation, the operation element based on the process of determining whether the drive source of the door operation device is abnormally heated and the electrical state of the switch Provided with a control circuit that performs each of the processes for determining whether or not it has been operated,
The control circuit includes:
When it is determined that the drive source of the door operation device is not abnormally heated, the drive source of the door operation device is activated based on detecting that the operation element has been operated, and the door operation When it is determined that the temperature of the drive source of the device is abnormally high, processing is performed that does not operate the drive source of the door operation device even if the operation element is operated,
When it is determined that the drive source of the door operation device is abnormally heated, the drive source of the door operation device is in an operation prohibited state based on outputting sound from the sound output device. The refrigerator which performs the process which alert | reports to a user. A box-shaped cabinet with an open front,
A first storage chamber that is provided inside the cabinet and has a space shape with an open front surface, to which cold air is supplied;
A second storage chamber that is provided inside the cabinet and has a space shape with an open front surface and is supplied with cold air;
A first door movably provided between a closed state that closes the front surface of the first storage chamber and an open state that opens the front surface of the first storage chamber;
A closed state in which the front surface of the first storage chamber is closed and an open state in which the front surface of the first storage chamber is opened, or a closed state in which the front surface of the second storage chamber is closed, and the second storage chamber. A second door movably provided between the open states that open the front of
A first operator that a user can operate from the front;
A first switch whose electrical state changes mutually depending on whether or not the first operator is operated;
A second operator that the user can operate from the front;
A second switch whose electrical state changes mutually depending on whether or not the second operator is operated;
A first door operating device for operating the first door to move forward from the closed state based on operating in the closed state of the first door, and having an electrical drive source;
A second door operation device for moving the second door forward from the closed state based on operating in the closed state of the second door, and having an electrical drive source;
An indicator provided in the first storage chamber and visually recognizable from the front in the opened state of the first door;
Whether to control each of the drive source for operating the first door device and the drive source for operating the second door device, and whether the drive source of the first door device is abnormally heated Based on the processing for determining whether the drive source of the second door operating device is abnormally heated and the electrical state of the first switch. A control circuit for performing each of a process for determining whether or not the second operation element is operated based on an electrical state of the second switch,
The control circuit includes:
When it is determined that the drive source of the first door operating device is not abnormally heated, the first door operating device is detected based on detecting that the first operating element has been operated. When the drive source is activated and it is determined that the drive source of the first door operation device is abnormally heated, the drive of the first door operation device is performed even if the first operator is operated. Do not operate the source,
When it is determined that the drive source of the second door operating device is not abnormally heated, the second door operating device is detected based on detecting that the second operating element has been operated. When the drive source is operated and it is determined that the drive source of the second door operation device is abnormally heated, the second door operation device is driven even if the second operation element is operated. Do not operate the source,
When it is determined that the temperature of the drive source of the second door operation device is abnormally high, the display unit is provided with the condition that the temperature of the drive source of the first door operation device is not abnormally high. The first door is moved forward from the closed state based on the processing for displaying that the drive source of the second door operation device is in an operation prohibition state and the operation of the drive source of the first door operation device. A refrigerator characterized by performing each of the operations to operate.

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