JP2015117895A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator having a door-opening device for opening a plurality of doors while simplifying a drive circuit.SOLUTION: The refrigerator includes: a turning door opening device 60 for opening turning doors 2a, 2b; a drawer door opening device 500 for opening drawer doors 5a, 6a; a plurality of door-opening switches 48a, 48b, 49 each indicating the turning doors 2a, 2b and the drawer doors 5a, 6a to open; and a control part 41 for controlling the turning door opening device 60 or the drawer door opening device 500 after receiving signals from at least one of the plurality of door-opening switches 48a, 48b, 49. The turning door opening device 60 includes a first drive source 82. The drawer door opening device 500 includes a second drive source 24, a drive circuit 53 for mutually driving the first drive source 82 and the second drive source 24, and a circuit exchange switch part 54 for switching the output path of the drive circuit 53. The circuit exchange switch part 54 exchanges an energizing path to the first drive source and the second drive source at a contact point C.

Description

  The present invention relates to a refrigerator.

  As background art in this technical field, there is JP-A-2006-308224 (Patent Document 1). In this publication, “a plurality of drawer-type doors for opening and closing the storage chamber of the storage body and a plurality of opening commands for supporting opening of the corresponding doors provided corresponding to the plurality of doors” are provided. An opening command generation unit and an actuator that is provided corresponding to each door and applies a force to the corresponding door in the opening direction, and when the opening command is generated almost simultaneously from the plurality of opening command generation units, The control means for driving only the actuator corresponding to one door is provided ", and" a circuit for providing a driving element for driving each actuator in common and individually opening and closing each actuator "is described in claim 7. A switch is provided, and the control means controls the drive element and selects and drives the actuator by selecting and switching the circuit switch. " It has been described.

  Further, paragraph [0018] of Japanese Patent Application Laid-Open No. 2001-59675 (Patent Document 2) describes “Electric door opening unit 7 for applying a force in the opening direction to the door 2a for the refrigerator compartment 2”. is there.

JP 2006-308224 A JP 2001-59675 A

  In Patent Documents 1 and 2, when door opening means is provided for a plurality of doors, a plurality of drive circuits corresponding to each of the plurality of actuators are required, and circuit components increase and become complicated.

  Then, this invention provides the refrigerator provided with the door opening apparatus which opens a some door, simplifying a drive circuit.

  The present application includes a plurality of means for solving the above-described problems. For example, a rotating door that rotates around a rotating shaft to open and close the storage chamber 2 and a storage chamber that moves back and forth. A drawer door that opens and closes, a pivot door opening device that opens the pivot door, a drawer door opening device that opens the drawer door, and a plurality of door switches that respectively instruct to open the pivot door and the drawer door And a control unit that receives the signal from at least one of the plurality of opening switches and controls the rotating door opening device or the drawer door opening device, the rotating door opening device being a first drive The drawer door opening device includes a second drive source, a drive circuit that drives the first drive source and the second drive source in common, and a circuit that switches an output path of the drive circuit And a circuit switch. Parts are characterized in that for switching the current path to the second drive source and said first drive source by C contact.

  ADVANTAGE OF THE INVENTION According to this invention, the refrigerator provided with the door opening apparatus which opens a some door, simplifying a drive circuit can be provided.

It is a front view of the refrigerator in embodiment of this invention. It is a sectional side view which shows typically the AA cross section of FIG. It is a sectional side view which shows typically the AA cross section of FIG. It is a top view which shows the structure of the drawer door opening apparatus of FIG. It is a perspective view which shows the structure of the drive transmission member by the drawer door opening apparatus of FIG. It is a perspective view which shows the structure of the drive connection member by the drawer door opening apparatus of FIG. It is a perspective view of the refrigerator main body side drive device by the drawer door opening apparatus of FIG. (A) to (f) is a plan view schematically showing the opening operation of the drawer door opening device. (A) to (d) are plan views schematically showing the closing operation of the drawer door opening device. It is the top view of the refrigerator seen from the B direction of FIG. It is a top view which shows the structure of a rotation door opening apparatus. It is CC sectional drawing of FIG. It is a flowchart which shows the control procedure of the opening operation | movement by a rotation door. It is operation | movement explanatory drawing which shows the relationship between the position of the door in each step in the opening operation | movement by the rotation door opening apparatus, the timing which performs pushing load detection, and a motor energization rate. (A) is a perspective view of a detection switch operation part provided with a switch lever and a detection switch, (b) is an exploded perspective view of a detection switch operation part. (A) to (f) is a plan view schematically showing a positional relationship among a large gear, an intermittent drive gear, and a switch lever in the rotating door opening device. It is a circuit diagram which shows the structure of the control system of a door opening apparatus. It is a control time chart figure of the refrigerator by 2nd Embodiment.

  First, the whole structure of the refrigerator which concerns on embodiment of this invention is demonstrated.

≪Overall configuration of refrigerator≫
FIG. 1 is a front view of a refrigerator in an embodiment of the present invention. As shown in FIG. 1, the refrigerator 1 of the present embodiment includes, from above, a refrigerator compartment 2 (storage compartment), an ice making chamber 3 and an upper freezer compartment 4 arranged side by side, and a lower freezer compartment 5 (storage compartment). And vegetable room 6 (storage room). In addition, as an example, the refrigerator compartment 2 and the vegetable compartment 6 are storage rooms in a refrigerator temperature zone of about 3 to 5 ° C. Further, the ice making room 3, the upper freezer room 4, and the lower freezer room 5 are storage rooms in a freezing temperature zone of approximately −18 ° C.

  The refrigerating room 2 includes a so-called French-type refrigerating room door 2a and a refrigerating room door 2b which are divided into left and right sides and have a double door opening on the front side (front side in FIG. 1). The refrigerator compartment doors 2a and 2b are pivot doors that pivot around the hinges 17a and 17b. In order to close the gap between the left and right refrigerator compartment doors 2a, 2b, a rotating partition 18 is provided along the side of the refrigerator compartment door 2a adjacent to the refrigerator compartment door 2b.

  The ice making room 3, the upper freezing room 4, the lower freezing room 5, and the vegetable room 6 are the ice making room door 3a, the upper freezing room door 4a, the lower freezing room door 5a, and the vegetable room door 6a as drawer doors that move back and forth. It has. In the following description, left and right refrigerator compartment doors 2a and 2b, ice making compartment door 3a, upper freezer compartment door 4a, lower freezer compartment door 5a, and vegetable compartment door 6a are simply door 2a, door 2b, door, respectively. 3a, door 4a, door 5a, and door 6a.

  The refrigerator 1 includes a door sensor (not shown) that detects the open / closed states of the doors 2a, 2b, 3a, 4a, 5a, and 6a, and these doors 2a, 2b, 3a, 4a, and 5a. , And the door 6a when the state determined to be open is continued for a predetermined time (for example, 1 minute or longer), an alarm (not shown) for notifying the user of that, and refrigeration A temperature setting device (such as the control panel 40 shown in FIG. 1 having a predetermined operation unit and a display unit) is provided for setting the temperature of the chamber 2, the upper freezing chamber 4, the lower freezing chamber 5, and the like.

  The refrigerator door 2a is provided with a left opening switch 48a, and the refrigerator door 2b is provided with a right opening switch 48b. The left opening switch 48a and the right opening switch 48b are configured to form a flat surface with a glass material or a resin material constituting the front surfaces of the doors 2a and 2b. That is, it is composed of a capacitive touch switch. Moreover, the lower-stage freezer compartment door 5a and the vegetable compartment door 6a are also provided with an opening switch 49, and these door switches 49 are constituted by a mechanical switch mechanism. In addition to this configuration, for example, when the front surfaces of the doors 2a and 2b are made of a steel plate, a mechanical switch mechanism, and when the front surfaces of the doors 5a and 6a are made of a glass material, a capacitive touch switch. Consists of. In addition, the door switches 48a, 48b, and 49 can employ any switch configuration such as a piezoelectric element, an electric element, and a mechanical element.

  FIG. 2 is a side sectional view schematically showing the AA section of FIG. 1. As shown in FIG. 2, the outside of the refrigerator 1 and the inside of the refrigerator 1 are separated by a heat insulating box 10 formed by filling a foam heat insulating material (foamed polyurethane) between the inner box 10a and the outer box 10b. ing. Moreover, the heat insulation box 10 of the refrigerator 1 is mounted with a plurality of vacuum heat insulating materials 14.

  In the warehouse, a plurality of storage chambers arranged in different vertical directions in different temperature zones are adiabatically partitioned by heat insulating partition walls 11a and 11b. That is, the upper heat insulating partition wall 11a separates the refrigerating room 2 that is a refrigerating temperature zone storage room from the upper freezing room 4 and the ice making room 3 (see FIG. 1) that are refrigerating temperature zone storage rooms. . Further, the lower heat-insulating partition wall 11b separates the lower freezing room 5 that is a storage room in the freezing temperature zone and the vegetable room 6 that is a storage room in the refrigerating temperature zone.

  A plurality of door pockets 13 (door storage portions) are provided on the inner side of the doors 2a and 2b. The refrigerator compartment 2 is partitioned into a plurality of storage spaces in the vertical direction by a plurality of shelves 12.

  In the upper freezer compartment 4, the lower freezer compartment 5, and the vegetable compartment 6, storage containers 4b, 5b, 6b are respectively provided behind the doors 4a, 5a, 6a provided in front of the respective storage compartments. The storage containers 4b, 5b, and 6b can be pulled out by placing a hand on a handle portion (not shown) of the doors 4a, 5a, and 6a and pulling it out toward the front side. Similarly, in the ice making chamber 3 shown in FIG. 1, a storage container (indicated by reference numeral 3b in FIG. 2) is provided behind the door 3a, and the handle 3 (not shown) of the door 3a is put on a hand and pulled out to the front side. Thus, the storage container 3b can be pulled out.

  As shown in FIG. 2, the doors 2a, 2b, 3a, 4a, 5a, and 6a are provided with door packings 15 around the doors 2a, 2b, 3a, 4a, 5a, and 6a. The inside of the storage space (the refrigerator compartment 2, the ice making compartment 3, the upper freezer compartment 4, the lower freezer compartment 5, and the vegetable compartment 6) is closed and sealed by closely adhering to the peripheral edge of the front opening of the refrigerator 1. This prevents the leakage of cold air from the storage space.

  As shown in FIG. 2, the cooler 7 is disposed in a cooler storage chamber 8 provided substantially at the back of the lower freezing chamber 5. The cooler 7 is configured by attaching a large number of fins (not shown) to the cooler pipe 7d so that heat can be exchanged between the refrigerant and the air in the cooler pipe 7d.

  Above the cooler 7, an internal fan 9 (for example, a motor-driven fan) is provided. The air cooled by heat exchange in the cooler 7 (hereinafter, this cooled low-temperature air is referred to as “cold air”) is blown into the refrigerator compartment air duct 22, the vegetable compartment air duct 25, and the ice making room by the internal fan 9. Via the duct 26a, the upper freezer compartment air duct 26b, and the lower freezer compartment air duct 27, it is sent to the storage rooms of the refrigerator compartment 2, the vegetable compartment 6, the ice making room 3, the upper freezer compartment 4, and the lower freezer compartment 5. It has become.

  As shown in FIG. 2, on the upper surface side of the ceiling wall of the refrigerator 1, a control board 41, which is a control unit on which a CPU, a memory such as a ROM or a RAM, an interface circuit, and the like are mounted as a control unit. The refrigerator 1 includes a refrigerator temperature sensor 44 that detects the temperature of the refrigerator compartment 2, a vegetable compartment temperature sensor 45 that detects the temperature of the vegetable compartment 6, a freezing temperature zone (the ice making chamber 3, the upper freezer compartment 4, and the lower freezer compartment). Temperature sensors such as a freezer temperature sensor 46 that detects the temperature of 5) and a cooler temperature sensor 47 that detects the temperature of the cooler 7 are provided, and the detected temperature is input to the control board 41. .

  The control board 41 includes a door sensor (not shown) that detects the open / closed state of the doors 2a, 2b, 3a, 4a, 5a, and 6a, and the control panel 40 (see FIG. 1) provided on the door 2a. The left door switch 48a (see FIG. 1) provided on the doors 2a and 2b, the right door switch 48b (see FIG. 1), and the door switch 49 (see FIG. 1) provided on the doors 5a and 6a. (See FIG. 1).

  The control board 41 individually drives the ON / OFF of the compressor 51 and the control of the rotational speed, the refrigeration temperature zone cool air control means 20 and the refrigeration temperature zone cool air control means 21 by the program previously installed in the ROM. Control of each driving motor (not shown), ON / OFF of the internal fan 9 and control of the rotational speed, ON / OFF of an alarm (not shown) for notifying the door open state, operation of the rotary door opening device 60 By controlling such as, etc., the operation of the entire refrigerator can be controlled.

  As shown in FIG. 2, a rotating door opening device 60 for the refrigerator compartment doors 2a and 2b is provided adjacent to the front surface of the upper surface of the ceiling wall of the refrigerator 1, that is, the doors 2a and 2b.

  Next, taking the vegetable compartment 6 as an example, a door opening device (drawer door opening device) 500 for the vegetable compartment door 6a will be described. The freezer compartment 5 has the same configuration.

≪Drawer door opening device≫
FIG. 3 is a cross-sectional view similar to FIG. 2, but is a diagram illustrating details of the opening device (drawing door opening device) 500 for the freezer compartment door 5a and the vegetable compartment door 6a.

<Configuration of door opening device>
The door 6a and the storage container 6b of the vegetable compartment 6 are supported by the door frame 400 so that they can be pulled out to the front. On the front side of the door frame 400, a closer 420, which is a closing biasing means for drawing the vegetable compartment 6 in the closing direction, is provided. When closing the opened vegetable compartment door 6a, for example, if the opening amount is 50 mm or less, the vegetable compartment 6a is given a force to be pulled into the back side by the weight of the vegetable compartment door 6a itself that is inclined (not shown). This assists the operation of closing the vegetable compartment door 6a and closes the door until the magnet packing 14 provided on the entire circumference of the vegetable compartment door 6a adsorbs to the refrigerator main body 1, thereby preventing the so-called half-open state of the door. it can.

  A door opening device 500 is provided at the bottom of the vegetable compartment 6. The door opening device 500 is provided on the refrigerator main body 1 side, and is provided on the refrigerator main body 1 side. The drive device 600 on the refrigerator main body 1 side includes a motor 24 that is a second drive source and a speed reduction mechanism that decelerates the rotation of the motor 24. And a connecting member 700 provided to move together with the vegetable compartment door 6a. Specifically, in this embodiment, the connecting member 700 is provided on the reinforcing member 410 installed so as to connect the left and right door frames 400. It is the structure which opens and closes the vegetable compartment door 6a by applying a force to the connecting member 700 in the moving direction of the door frame 400 from the driving device 600 on the refrigerator body 1 side. Detailed configurations and functions of the driving device 600 and the connecting member 700 on the refrigerator body 1 side will be described later.

  Then, in the vegetable compartment 6, it is detected whether or not the vegetable compartment 6 is completely closed (that is, whether or not the vegetable compartment door 6a is in a closed state), and a control board 41 as will be described later. The first door state detecting means 510 is provided which is configured to send the signal to the first door state detecting means 510. As a method for installing the first door state detection means 510, the magnetic detection sensor 512 is provided in the driving device 600 on the refrigerator main body 1 side, and the magnet 511 for operating the magnetic detection sensor 512 is provided in the connecting member 700. Thereby, it is possible to reliably detect whether or not the vegetable compartment 6 is completely closed (that is, whether or not the vegetable compartment door 6a is closed).

<Configuration of multi-stage acceleration link>
Next, the configuration of the door opening device 500 including the drive device 600 on the main body side and the connecting member 700 provided on the reinforcing member 410 will be described in detail with reference to FIGS. 4 to 9. Here, although the door opening apparatus 500 is demonstrated below as what is provided in the vegetable compartment 6, the freezer compartment 5 is also the same structure. In addition, about the same structure as FIGS. 1-3 mentioned above, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  FIG. 4 is a plan view showing the configuration of the drawer door opening device in the embodiment of the present invention. FIG. 5 is a perspective view showing the configuration of the connecting member in the embodiment of the present invention. FIG. 6 is a perspective view showing the configuration of the drive transmission member in the embodiment of the present invention.

4 to 6, reference numeral 400 denotes door frames provided on the left and right sides of the aforementioned drawer door (vegetable room door 6 a in FIG. 3), and a reinforcing member 410 installed so as to connect the left and right door frames 400. It has. The reinforcing member 410 is provided with a connecting member 700 to be described later, and this connecting member 700 receives a driving force from a drive transmission member 640 of a driving device 600 (see FIG. 3) attached to the refrigerator main body 1 side. Thus, in the motor 600 (see FIG. 3) on the refrigerator main body 1 side, the drawer door (the vegetable compartment door 6a in FIG. 3) is automatically opened and closed. Further, a drive transmission member 640 that is a rotary drive body is rotatably supported. The drive transmission member 640 has a plurality of openings arranged at positions where the distance from the rotation center is gradually changed in the rotation direction so that the drawer door (vegetable room door 6a in FIG. 3) can be opened. A door pushing portion 660 is provided.

  The door opening pusher 660 is provided with, for example, eight pushers, and according to the distance from the drive shaft 620, the first pusher 661 at a distance r1 and the second pusher 662 at a distance r2. A third pusher 663 at a distance r3, a fourth pusher 664 at a distance r4, a fifth pusher 665 at a distance r5, a sixth pusher 666 at a distance r6, a seventh pusher 667 at a distance r7, An eighth pressing portion 668 is provided at a distance r8, each pressing portion has a substantially planar shape, and is substantially part of the radiation from the drive shaft 620. Here, it is assumed that r1 <r2 <r3 <r4 <r5 <r6r <r7 <r8.

  Further, the drive transmission member 640 is provided with a door closing push portion 670 so that the drawer door (vegetable compartment door 6a in FIG. 3) can be closed.

  In order to simplify the configuration of the connecting member 700 described later, the distance r9 from the rotation center of the door closing push portion 670 is set to the push farthest from the rotation center among the plurality of door opening push portions 660 described above. Part, for example, the eighth pushing part 668, is set at substantially the same distance.

  The connecting member 700 integrally includes a locking portion 710 for fixing to the reinforcing member 410, and an opening portion 730 and a closing portion 720 configured to open and close the drawer door (vegetable compartment door 6a in FIG. 3). Alternatively, it is configured separately.

  The opening portion 730 of the connecting member has a plurality of stepped receiving surfaces (for example, 731) arranged at positions corresponding to the plurality of opening push portions 660 arranged on the drive transmission member 640 described above. (8 steps of surfaces from the first receiving surface to the eighth receiving surface 738). Accordingly, the drawer door (vegetable room door 6a in FIG. 3) can be opened by rotating the rotational movement of the drive transmission member 640 in the direction of the arrow CCW and changing the connecting member 700 into a linear movement. To do.

  Further, the door closing portion 720 of the connecting member 700 is provided with a door closing surface 722 at a position corresponding to the door closing pressing portion 670 provided in the drive transmission member 640 described above. As a result, the drive transmission member 640 rotates in the direction of the arrow CW opposite to that when the drawer door is opened, and the connecting member 700 is changed to a linear motion, whereby the drawer door (vegetable compartment door 6a in FIG. 3) is moved. It is configured to allow confinement. In other words, the drive transmission member 640 is provided with the door closing push portion 670 that can close the drawer door that is not fully closed (half door open state), and the rotational movement of the door push portion 670 is controlled by the connection member 700. By changing to a linear motion, the drawer door in the half door open state can be closed.

  Although details will be described later, a space 721 is provided so that the door closing push portion 670 does not come into contact with the connecting member 700 by the rotational movement of the drive transmission member 640.

  As an example of the rotation detecting means for detecting the origin position of the drive transmission member 640, as shown in FIG. 4, the magnet 531 provided on the drive transmission member 640 itself and the magnetic force of the magnet 531 are sensed to perform the switching operation. There is a position detection means 530 of the drive transmission member 640 configured with a magnetic detection sensor 532 configured to perform the above. If the magnetic detection sensor 532 is provided in the motor 600 on the main body side, the wiring and signal lines of the magnetic detection sensor 532 can be shared with the motor 600 on the refrigerator main body 1 side, so that the configuration is simple.

<Configuration of drive device>
In FIG. 7, a motor pinion 25 is provided on the rotating shaft of the motor 24 and meshes with the idler 26 to be decelerated. The idler 26 and the idler pinion 27 rotate as a unit, and the idler pinion 27 meshes with the idler 28. The idler 28 and the idler pinion 29 rotate as a unit, and the idler pinion 29 meshes with the drive gear 30 and is decelerated. The drive shaft 620 and the drive gear 30 are connected to each other, and the rotational speed of the motor 24 is reduced to, for example, about 1/100 by such a gear configuration, and the drive transmission member 640 provided on the drive shaft 620 is rotated. .

  In the present embodiment, a torque limiting means 31 is provided between the idler 28 and the idler pinion 29, and when an excessive external force is applied to the drive transmission member 640, the torque limiting means 31 is interposed and the idler 28 and the idler are interposed. Since the pinion 29 slides on each other, the motor 600 on the refrigerator body 1 side can be prevented from being damaged. The driving of the motor 600 that is a driving unit is controlled by a control circuit (not shown) that is a control unit. Thereby, the reliability of the opening / closing operation | movement of a drawer door is improved.

  As an example of the rotation detection unit 32, the rotation detection unit 32 is provided on the drive shaft 620 so that the rotation position of the drive shaft 620 can be detected. An example of such rotation detection means 32 is a variable resistor whose resistance value changes with the rotation of the shaft. As another example of the rotation detection means 32, the position detection means of the drive transmission member 640 including the magnet 531 illustrated in FIG. 4 and the magnetic detection sensor 532 that detects the magnetic force of the magnet 531 and performs a switching operation. There are 530.

<Opening action>
Next, the detail of the operation | movement at the time of opening the vegetable compartment door 6a with the door opening apparatus 500 by this invention is demonstrated using FIG. FIG. 8 is a view for explaining the opening operation of the drawer-type door opening device 500 according to the embodiment of the present invention. In addition, about the same structure as FIGS. 1-7 mentioned above, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  In FIG. 8, (a) is the origin position mentioned later, and has shown the state in which the vegetable compartment 6 is closed. And the operation | movement which opens the vegetable compartment 6 by operating in order of (b) (c) (d) (e) (f) is shown.

  First, the origin position in FIG. In (a), the connecting member 700 shown by the solid line is in the position where the left end in the drawing matches the retracted position 34 and the vegetable compartment door 6a (6a in FIG. 3) is closed. In the refrigerator, even if the door opening device 500 is provided, the vegetable compartment door 6a may be manually pulled out by the user for some reason. Alternatively, when the door opening device 500 does not operate due to a failure, it is desirable that the user can manually open and close it freely.

  If the user manually pulls out and opens the vegetable compartment door 6a from the state in which the vegetable compartment door 6a is closed, the opening part 730 of the connecting member provided in the vegetable compartment door 6a moves to the left side in the figure, It becomes the position of the broken line. At the position of the broken line, “′” is added to each symbol. Here, when the drive transmission member 640 is at the position indicated by the solid line in FIG. 8A and the connecting member 700 moves to the left in the drawing, the lowest end portion of the connecting member 700 shown closest to the uppermost end portion 680. There is a gap δ4 between 740 and 740. Thereby, even if the opening part 730 of the connection member 700 moves to the left in the figure, the uppermost end 680 and the lowermost end part 740 are in a positional relationship. Further, a gap δ3 is provided between a first pressing portion 661 of a drive transmission member 640 described later and a first receiving surface 731 of the opening portion 730 of the connecting member, and the vegetable compartment door 6a is closed. In the state, the first pressing portion 661 and the first receiving surface 731 are in a positional relationship where they do not contact each other. Thereby, since the connection member 700 and the drive transmission member 640 do not contact when a user opens and closes the vegetable compartment door 6a manually, the vegetable compartment door 6a can be opened and closed freely.

  Such a position of the drive transmission member 640 is referred to as being at the origin position 40 in the present invention.

  Here, the drive transmission member 640 is rotatable around the drive shaft 620. Further, the opening portion 730 of the connecting member 700 is supported so as to be movable in the horizontal direction in the figure. Moreover, the opening part 730 of the connection member 700 is provided in the vegetable compartment door 6a side. That is, the leftward movement of the opening portion 730 of the connecting member 700 indicates the opening operation of the vegetable compartment door 6a. In addition, the reference line which shows the position of the illustration left end of the connection member 700 in the state by which the vegetable compartment door 6a is closed is represented as the drawing-in position 34.

  When the drive is started, as shown in FIG. 8B, the drive transmission member 640 rotates in the direction of the arrow CCW, the first push portion 661 comes into contact with the first receiving surface 731, and the connecting member 700. A force in the direction of the arrow 23b is applied to the opening portion 730. At this time, since the first pushing portion 661 is located at the distance r1 shown in FIG. 4 from the drive shaft 620, the force transmitted from the first pushing portion 661 to the opening portion 730 of the connecting member 700 is driven. If the torque applied to the shaft 620 is T, then T / r1. This force is set to be larger than the resultant force of the force to peel off the magnet packing of the vegetable compartment door 6a, the pulling force by the closer 420, the weight of the vegetable compartment door 6a and the force of accelerating the mass of the stored food. To do. Thereby, the adsorption | suction of magnet packing is peeled off, the opening part 730 of a connection member moves to the illustration left direction with the vegetable compartment door 6a, and the vegetable compartment 6 begins to open.

  Further, in the state of FIG. 8C in which the drive transmission member 640 is rotated in the CCW direction, the second pressing portion 662 is in contact with the second receiving surface 732, and the first pressing portion 661 is the first receiving surface 731. Is far from. That is, the second pressing portion 662 is located at the distance r2 shown in FIG. 4 from the drive shaft 620 and r2> r1, and the second pressing portion 662 is more than the first pressing portion 661. Since the distance from the drive shaft 620, which is the center of rotation, is longer, the peripheral speed of rotation is faster. Therefore, after the second pressing portion 662 comes into contact with the second receiving surface 732, the first pressing portion 661 is separated from the first receiving surface 731. In this state, the second pushing portion 662 is in contact with the second receiving surface 732 and applies the force indicated by the arrow 23c. At this time, since the second pressing portion 662 is located at the distance r2 shown in FIG. 4 from the drive shaft 620, the door opening portion of the connecting member 700 is connected to the second pressing portion 662 via the second receiving surface 732. The force transmitted to 730 is T / r 2 where T is the torque applied to the drive shaft 620. This force is smaller than the force applied to the opening portion 730 of the connecting member 700 by the first pushing portion 661 in the direction of the arrow 23b in the state of FIG. 8B, but the magnet packing has already been peeled off. Therefore, the force applied at this time may be set to be larger than the resultant force of the pull-in force by the closer 13 and the force that further accelerates the weight of the vegetable compartment door 6a and the mass of the stored food. The opening part 730 further moves to the left in the figure together with the vegetable compartment door 6a, and continues the opening operation of the vegetable compartment 6.

  Further, in the state (d) in which the drive transmission member 640 is rotated in the CCW direction, the third pushing portion 663 is in contact with the third receiving surface 733, and the second pushing portion 662 is separated from the second receiving surface 732. Get away. In other words, the third pushing portion 663 is located at the distance r3 shown in FIG. 4 from the drive shaft 620 and r3> r2, and the third pushing portion 663 is more than the second pushing portion 662. Since the distance from the drive shaft 620, which is the center of rotation, is longer, the peripheral speed of rotation is faster. Therefore, after the third pressing portion 663 comes into contact with the third receiving surface 733, the second pressing portion 662 is separated from the second receiving surface 732. In this state, the third pushing portion 663 is in contact with the third receiving surface 733 and applies the force indicated by the arrow 23d. At this time, since the third pushing portion 663 is located at the distance r3 shown in FIG. 4 from the drive shaft 620, the opening 730 of the connecting member is connected from the third pushing portion 663 via the third receiving surface 733. The force transmitted to is T / r3, where T is the torque applied to the drive shaft 620. This force is smaller than the force applied to the opening part 730 of the connecting member 700 by the second pushing part 662 in the direction of the arrow 23c in the state of FIG. 8C, but the vegetable compartment door 6a has already opened. The vegetable compartment door 6a has a momentum corresponding to its own weight and speed including the container 12 and the stored food, and the momentum and the third pusher 663 are used to move the The opening operation can be further continued against the pulling force by the closer 13 by the force transmitted to the third receiving surface 733.

  Further, the drive transmission member 640 rotates in the CCW direction, and the fourth pressing portion 664 sequentially contacts the fourth receiving surface 734 in the same manner as described above, and then the fifth pressing portion 665 is the fifth receiving surface. 735, and then the sixth pushing portion 666 is in contact with the sixth receiving surface 736, and then the seventh pushing portion 667 is in contact with the seventh receiving surface 737 (state of FIG. 8 (e)). Next, when the eighth pushing portion 668 is in contact with the eighth receiving surface 738 (the state shown in FIG. 8F), the opening operation of the vegetable compartment door 6a can be continued.

  And after the state of FIG.8 (f), the drive transmission member 640 has shown the state which leaves | separates from the opening part 730 of the connection member 700 substantially.

  The range of the movement amount 33 of the connecting member 700 from the state of FIG. 8A to the state of FIG. 8F is the range in which the opening portion 730 of the connecting member 700 receives force from the drive transmission member 640. Is an open driving range. Here, it is preferable that the moving amount 33 of the opening portion 730 of the connecting member 700 is set to be larger than the closing bias range that is the retracting amount by the closer 420. That is, if the retracting stroke by the closer which is the closing urging range is 50 mm and the moving amount 33 of the opening portion 730 of the connecting member 700 is 60 mm or more (the connecting member at the position shown in FIG. 8F). This is because the vegetable compartment door 6a that has just been opened by the closer 420 is not closed even if the open door portion 730 is stopped, that is, the vegetable compartment door 6a is stopped.

  Further, the moving amount 33 of the opening portion 730 of the connecting member 700 is set to be, for example, 1/4 or more of the full opening dimension of the drawer door (vegetable room door 6a in FIG. 3), that is, the pull-in by the closer 420 described above. If set so as to be larger than the closing urging range which is the amount, the vegetable chamber door 6a just opened by the closer 420 is not closed.

  Further, if the drawer door is opened by 1/4 or more of the full open dimension, the stored food in the drawer container 6b (container 6b in FIG. 3) can be automatically opened to the extent that it can be understood, so that the convenience of the refrigerator is improved.

  When the vegetable compartment door 6a is opened more than the state of FIG. 8 (f) and the opening portion 730 of the connecting member 700 moves to the left in the drawing, the opening portion 730 of the connecting member 700 is separated from the drive transmission member 640. Although it does not receive the driving force, the vegetable compartment door 6a has a speed in the direction of the arrow 23f, so until it is gradually decelerated and stopped by the friction load of the door frame 400 (400 in FIG. 3), Continue opening. Since it operates in this way, the opening amount of the vegetable compartment door 6a is larger than the movement amount 33 of the opening portion 730 of the connecting member 700.

  As described above, the driving force in the opening direction is not continuously applied during the opening operation of the vegetable compartment door 6a, but the driving force is applied only at the beginning of opening, and thereafter the moving speed obtained in the range of the driving force is the door frame 400. Because it is possible to realize the operation of stopping while gradually decelerating due to the frictional force of the door, it opens even if the vegetable compartment door 6a hits when the user is standing just before the door or when an object is placed It is safe because no driving force is applied in the direction.

  As described above, the driving force in the opening direction is not continuously applied during the opening operation of the vegetable compartment door 6a, but the driving force is applied only at the beginning of opening, and thereafter the moving speed obtained in the range of the driving force is the door frame 400. Because it is possible to realize the operation of stopping while gradually decelerating due to the frictional force of the door, it opens even if the vegetable compartment door 6a hits when the user is standing just before the door or when an object is placed It is safe because no driving force is applied in the direction.

  After the vegetable compartment door 6a is opened by the above operation (after FIG. 8 (f)), the drive transmission member 640 further continues to rotate in the CCW direction, and the state of FIG. To stop rotating. Needless to say, in this case, the connecting member 700 is not at the position shown by the solid line in FIG. 8A, and the vegetable compartment door 6a is open, so that it is moved to the left, for example, the position of the broken line. is there.

<Close operation>
When the vegetable compartment door 6a is closed, the vegetable compartment door 6a is not closed until the magnet packing 14 is adsorbed for some reason, so that a gap is formed between the magnet packing 14 and the refrigerator body 1, so-called half-door state. May be. The operation of the door opening device 500 when the door is in the half door state will be described with reference to FIG.

  FIG. 9 is a view showing the operation when the door opening device 500 according to the present invention closes the vegetable compartment door 6a. FIG. 9A shows that the vegetable compartment door 6a is not closed and the left end of the connecting member 700 is retracted. It shows that the position is moved by the opening amount 35 that is the closing drive range in which the closing operation can be performed from the position 34. If the vegetable compartment door 6a is provided with the closer 420, the vegetable compartment door 6a is usually drawn in and closed by the pulling force generated by the closer 420, but a part of the food is caught, etc. There are rare cases where the operation of the door frame 400 temporarily becomes awkward for some reason and cannot be pulled in.

  Here, when the drive transmission member 640 is rotated around the drive shaft 620 in the direction of the arrow CW, the door closing push portion 670 of the drive transmission member 640 rotates in the space 721 constituting the door closing portion 720 of the connecting member 700, It abuts on a door receiving surface 722 constituting the door closing portion 720 of the connecting member (FIG. 9B).

  When the drive transmission member 640 is further rotated in the direction of arrow CW, the door closing surface 722 is pushed and moved in the direction of arrow 36 by the door closing pressing portion 670, so that the illustrated left end of the connecting member 700 reaches the retracted position 34. (FIG. 9C).

  The position shown in FIG. 9C indicates that the vegetable compartment door 6a is completely closed until the magnet packing 14 is attracted to the refrigerator body 1.

  Thereafter, the drive transmission member 640 rotates in the direction of the arrow CCW to the state of FIG. 9D, and rotates to the same origin position 40 as shown in FIG. 8A and stops.

  By operating as described above, even if the vegetable compartment door 6a is not completely closed and is in a so-called half-door state, the drive transmission member 640 is rotated in the opposite direction to the case where the vegetable compartment door 6a is opened. Since it can close by applying the force of the direction which closes the vegetable compartment door 6a with respect to the connection member 700, a half door can be prevented and it is suitable.

  As described above, the force for opening the vegetable compartment door 6a needs to be more than the sum of the force for peeling the magnet packing 15 and the pulling force by the closer 420, but when closing the magnet packing 15 The force to peel off is unnecessary, and further, the pulling force by the closer 420 is generated. Therefore, the closing force applied by the opening device 500 according to the present invention is sufficient as a weak force compared to the opening force. According to this embodiment, when closing the vegetable compartment door 6a, the eighth pushing portion 668 that is farthest from the drive shaft 20 and the closing push portion 670 that is substantially the same distance are used to close the closing portion 720 of the connecting member. Since it is a pushing structure, even if the driving torque applied to the drive shaft 620 is the same as that at the time of opening, the closing force is preferably smaller by r1 / r9 (see FIG. 4) than the opening force.

  Next, the operation and structure of the revolving door opening device 60 for the refrigerator compartment doors 2a and 2b will be described.

≪Cooling room door opening device≫
FIG. 10 is a plan view of the refrigerator as viewed from the direction B of FIG.

<Configuration of door opening device>
As shown in FIG. 10, the rotating door opening device 60 includes push-out members 61a and 61b corresponding to the door 2a and the door 2b, respectively. The push-out members 61a and 61b operate so as to protrude toward the doors 2a and 2b from the state accommodated in the rotary door opening device 60, and push the doors 2a and 2b by pushing the vicinity of the upper ends of the refrigerator compartment doors 2a and 2b. open.

  Next, the rotating door opening device 60 of the refrigerator in the present embodiment will be described in detail. FIG. 11 is a plan view of the rotary door opening device 60. 12 is a cross-sectional view taken along the line CC of FIG.

  The front, rear, up, down, left, and right directions in the description of the rotary door opening device 60 below are the same as the front, rear, top, bottom, left, and right of the refrigerator 1 (see FIGS. 1 and 2) to which the rotary door opening device 60 is attached. Reference is made to the front, rear, top, bottom, left and right directions shown in FIG.

  As shown in FIGS. 10 and 11, the revolving door opening device 60 of the present embodiment has a first drive in a housing formed by a case 62 that is a lower half and a cover 69 that is an upper half. The motor 82, which is a power source, a reduction gear train 83, a large gear 76, a pair of intermittent drive gears 78a and 78b, and a pair of push-out members 61a and 61b are mainly provided.

  Incidentally, as shown in FIG. 11, the state in which the pushing members 61 a and 61 b do not protrude from the inside of the case 62 toward the outside thereof may be referred to as the “initial state” of the rotary door opening device 60. Further, the positions of the reduction gear train 83, the large gear 76, the intermittent drive gears 78a and 78b, and the pushing members 61a and 61b in the rotating door opening device 60 in the “initial state” are referred to as “origin positions”. There is.

  The type of the motor 82 is not particularly limited as long as the rotary shaft rotates in both forward and reverse directions. As the motor 82 in the present embodiment, for example, a brush type direct current motor, which can rotate in both the forward direction and the reverse direction by reversing the polarity of the voltage applied to the terminal is assumed. doing.

<Configuration of reduction gear>
The reduction gear train 83 transmits the power to the large gear 76 while reducing the rotation of the motor 82.

  The reduction gear train 83 in this embodiment includes a worm gear 84, a worm wheel 85, a second gear 87, a third large gear 88a, a third small gear 88b, and a fourth large gear 90a. And a fourth small gear 90b.

  12 is a cross-sectional view taken along the line CC of FIG.

  As shown in FIGS. 11 and 12, the worm gear 84 is provided on the rotating shaft of the motor 82 and meshes with the worm wheel 85 that is the first gear. The second gear 87, which is a spur gear, is provided integrally with the worm wheel 85, and both the worm wheel 85 and the second gear 87 are rotatably supported around the worm wheel shaft 86.

  The second gear 87 meshes with the third large gear 88a (see FIG. 11), and this third large gear 88a is integrated with the third small gear 88b (see FIG. 11) to form a third support. It is rotatably supported around a shaft 89 (see FIG. 11). Further, the third small gear 88b (see FIG. 11) meshes with the fourth large gear 90a. The fourth large gear 90a is pivotally supported around the fourth support shaft 91 integrally with the fourth small gear 90b. The fourth small gear 90 b meshes with teeth 76 A and 76 B described later of the large gear 76.

  That is, the reduction gear train 83 is configured to transmit the rotational force of the motor 82 to the large gear 76 while reducing the rotational force as described above.

  An example of the rotation direction of each gear when the motor 82 is rotated is indicated by arrows in FIG.

  As an example, the rotation direction of the worm gear 84 is indicated by the solid line arrow in the direction in which the worm wheel 85 provided on the worm gear 84 and the helical teeth meshing with the worm gear 85 is rotated counterclockwise in the plan view shown in FIG. For example, when the teeth of the worm gear 84 are left-handed spirals that are opposite to general screws, the motor 82 may be rotated clockwise as viewed from the front end side of the worm gear 84. Such a rotation direction is referred to as a “forward rotation direction”.

  A case where the worm gear 84 is rotated in the reverse direction by reversing the polarity of the voltage applied to the motor 82 is indicated by a broken-line arrow. In this embodiment, such a rotation direction is referred to as a “reverse direction”. Shall.

  Needless to say, “forward rotation” and “reverse rotation” are for convenience of description of the present embodiment, and are not limited to such expressions.

<Configuration of extruded member>
As shown in FIG. 11, the pushing members 61 a and 61 b are elongate rods having a polygonal cross section such as a quadrangle or a circular cross section, and are formed by an upper half cover 69 and a lower half case 62. It arrange | positions along each of the left side and the right side in the said housing.

  The push-out members 61a and 61b are slidably supported on the guide rails 66a and 66b via the connecting plates 65a and 65b so as to be movable along the front-rear direction of the rotary door opening device 60.

  Further, the front ends of the pushing members 61a and 61b face the outside of the housing through openings 63a and 63b (see FIG. 11) provided on the front surface of the housing so as to straddle the case 62 and the cover 69. The push-out members 61a and 61b are configured to return to their original positions after protruding toward the doors 2a and 2b.

<Description of operation>
Next, the operation when the rotating door opening device 60 opens the left door 2a will be described with reference to FIGS. FIG. 13 is a flowchart showing a control procedure of the door opening operation. When the user operates the left opening switch 48a, the control board 41 (control unit) executes a door opening program for the left door 2a. FIG. 14 is an operation explanatory view showing the relationship between the position of the door at each stage during the opening operation by the rotating door opening device, the timing for detecting the pushing load, and the motor current ratio. In this embodiment, a method of detecting the current value of the motor 82 is used as a means for detecting the pushing load.

  As described above, the positions of the reduction gear train 83, the large gear 76, the intermittent drive gears 78a and 78b, and the pushing members 61a and 61b in the "initial state" rotating door opening device 60 are "origin positions", The extruding members 61a and 61b have not yet protruded. At this time, since the pivot door is not operating, the door packing 15 is in close contact with the peripheral edge of the opening on the front surface of the refrigerator 1, and the closer is acting (point A in FIGS. 13 and 14). ).

  Here, when the user operates the left door switch 48a, the control board 41 (control unit) executes a door opening program for the left door 2a (Yes in step S121 in FIG. 13).

  The energization rate of the motor 82 undergoes a soft start in which the energization rate is gradually increased from 0 to a predetermined energization rate a in order to prevent overcurrent due to sudden energization at the start of energization. When the large gear 76 and the cam portion 99 are rotated clockwise from the “origin position” (see FIG. 16A) by driving in the forward direction at a predetermined energization rate a (step S122 in FIG. 13), the large gear The recessed portion 76Da of 76 is in a state of being close to the stopper portion 80a of the intermittent drive gear 78a (see FIG. 16B). In this state, the large gear 76 has not yet meshed with any of the intermittent drive gears 78a and 78b, and the left and right pushing members 61a and 61b have not yet protruded (point B in FIGS. 13 and 14).

  After energization of the motor 82 is started (step S122 in FIG. 13), measurement of a time t1 set in advance as a time during which the current of the motor 82 is not detected is started (step S123 in FIG. 13).

  Further, when the motor 82 is driven in the forward rotation direction and the large gear 76 and the cam portion 99 are rotated clockwise from the “origin position”, the intermittent drive gear 78a is meshed with the large gear 76 and is rotated counterclockwise. Start (see FIG. 16C). The rotating plate 73a integrated with the intermittent drive gear 78a also rotates counterclockwise (see FIG. 16D). As a result, the connecting plate 65a meshing with the rotating plate 73a is pushed forward. The pushing member 61a connected to the connecting plate 65a starts to project forward. Thereby, the door opening operation of the left door 2a is started.

  Further, when the motor 82 is driven in the forward direction until the time t1 elapses (Yes in step S124 in FIG. 13) and the large gear 76 and the cam portion 99 are rotated clockwise from the “origin position”, the connecting plate 65a is Further, the door is pushed forward, the door packing 15 moves away from the opening peripheral edge of the front surface of the refrigerator 1, and the rotating door operates to a position where the closer does not act (point C in FIGS. 13 and 14).

  In addition, the time t1 set beforehand as the area which does not detect the electric current value of the motor 82 cancels | releases the contact | adherence state of the door packing 15 closely_contact | adhered with the opening peripheral part of the front surface of the refrigerator 1, and the position where a closer does not act. It is important to set the time for the door to rotate. When releasing the close contact state of the door packing 15 with respect to the opening peripheral edge of the front surface of the refrigerator 1, the greatest force is required in the opening operation of the door 2a. For example, the door packing 15 is configured to have a magnetic material (not shown) such as a permanent magnet inside a flexible member (not shown) made of resin, and the outer shell of the refrigerator 1 is based on iron such as a steel plate. It consists of an alloy. In this configuration, when the door packing 15 is brought close to the opening peripheral edge of the front surface of the refrigerator 1, the magnetic body of the door packing 15 is attracted to the opening peripheral edge by a magnetic force and closely contacts.

  That is, until the door 2a actually starts to open, a load caused mainly by the door packing 15 being in close contact with the peripheral edge of the opening by the magnetic force acts on the pushing member 61a. In other words, at the start of the opening operation of the door 2a (between point B and point C in FIG. 14), the load for releasing the close contact state of the door packing 15 is more dominant than the load of the door storage unit. Therefore, during the time t1, the motor 82 is driven at a predetermined energization rate a without detecting the current value of the motor 82. It should be noted that during the time t1, the current value of the motor 82 may be detected. In this case, the energization rate of the motor 82 is not controlled based on the detected current value, but is the motor 82 operating normally? Suitable for checking.

  Furthermore, when the rotating door is moved to a position where the closer does not act, the pushing load applied to the pushing member 61a becomes a load amount due to the load of the door housing portion and the friction of the hinge, and compared with a state where the stress of the closer is received, It is possible to detect a stable load.

  The sampling of the current value of the motor 82 is started by the motor current detecting means 50b (see FIG. 17) mounted on the control board 41 from the point C at which the time t1 has elapsed and a stable load can be detected (see FIG. 17). 13 step S125).

  In addition, after step S125 when sampling of the current value of the motor 82 is started, measurement of a time t2 set in advance as a time for sampling the current value of the motor 82 is started (step S126 in FIG. 13).

  Further, the motor 82 is driven in the forward direction while continuing sampling of the current value of the motor 82 until the time t2 elapses (Yes in step S127 in FIG. 13). As a result, the push-out member 61a continues to protrude forward, and the door opening operation of the left door 2a is continued.

  In the sampling of the current value of the motor 82, the average value of the results obtained by sampling the motor current for the time t2 (C point-D point interval in FIGS. 13 and 14) preset as the motor current sampling time is calculated and calculated. Calculation is performed by the control device 50c (see FIG. 17) based on the average value of the current values thus calculated, and a motor energization rate b for energizing the motor after point D is calculated (step S128 in FIG. 13).

  From this calculation result, after the point D, the motor drive means 50a (see FIG. 17) is used to operate at the motor conduction rate b increased or decreased (step S129 in FIG. 13).

  Further, the motor 82 is driven in the forward rotation direction at the power supply rate b for a time t3 (D point-E point interval in FIGS. 13 and 14) set in advance as a time for driving at the power supply rate b, and the pushing member 61a is The protruding operation is continued toward the front, and the opening operation of the left door 2a is continued.

  In addition, after step S129 in which the driving of the motor 82 is started at the energization rate b, measurement of a time t3 set in advance as a time for driving at the energization rate b is started (step S130 in FIG. 13).

  When the time t3 elapses and the time t3 preset as the time for driving at the energization rate b elapses (Yes in step S131 in FIG. 13), the energization of the motor 82 is stopped and the left door 2a is opened. The operation ends (step S132 in FIG. 13; point E in FIGS. 13 and 14).

  In addition, the operation | movement when the rotation door opening apparatus 60 in this embodiment opens the right door 2b is the same as the operation | movement at the time of opening the left door 2a, and the rotation direction of the motor 82 becomes reverse. In addition, more stable control becomes possible by providing each energization rate and each set time which are set to the left and right doors 2a and 2b individually for each door. For example, when the size and weight of the door are different between the right door 2a and the left door 2b, the distances from the hinges 17a and 17b, which are rotating shafts, to the positions where the pushing members 61a and 61b are in contact with the doors 2a and 2b are different. In this case, the load on the door varies depending on the presence or absence of the rotating partition 18 and the storage capacity of the door pocket 13 which is the door storage unit. Therefore, the energization rate and the set time corresponding to the assumed load range are set for each door. It is preferable to provide it.

<Switch lever and detection switch>
In addition to the above-described embodiment, a configuration using detection switches 95a and 95b capable of detecting the protruding positions of the pushing members 61a and 61b will be described. The detection switches 95a and 95b enable door opening control with higher accuracy.

  FIG. 15A is a perspective view of a detection switch operation unit including a switch lever and a detection switch that engages with a large gear, and a perspective view showing a state in which the large gear is looked up obliquely from below. FIG. It is a disassembled perspective view of a detection switch operation part. FIG. 15A shows a state of the switch lever related to the large gear at the origin position.

  As shown in FIGS. 15A and 15B, the detection switch operating portion includes switch levers 96a and 96b that engage with the cam portion 99 of the large gear 76, a detection spring 97, and detection switches 95a and 95b. And is mainly configured.

  The switch levers 96a and 96b are formed of a pair of symmetrical lever members, and a shaft support portion 98 is formed at a substantially central portion in the longitudinal direction. The shaft support 98 is supported by a common shaft member (not shown), so that the switch levers 96a and 96b are individually rotatable around the shaft member.

  As shown in FIG. 15 (b), on one end side of the switch levers 96a, 96b in the longitudinal direction, spring protrusions 96Ba, 96Bb (the switch lever 96b in FIG. A spring projection 96Bb on the side is not shown). A detection spring 97 which is a compression spring is hung between the spring protrusions 96Ba and 96Bb.

  Further, on one end side of the switch levers 96a and 96b, the switch protrusions 96Aa and 96Ab (on the switch lever 96a side in FIG. 15B) are arranged on the surface opposite to the side where the spring protrusions 96Ba and 96Bb are formed. The protrusion 96Aa is formed with an unillustrated).

  The switch protrusions 96Aa and 96Ab are provided with a detection switch 95a and a detection switch 95b facing each other. The detection switches 95a and 95b are constituted by tact switches, for example. That is, when the switch protrusion 96Ab of the switch lever 96a comes into contact with the detection switch 95a, the switch is turned on, and when it is separated, the switch is turned off. Further, when the switch protrusion 96Ab of the switch lever 96b contacts the detection switch 95b, the switch is turned on, and when it is separated, the switch is turned off.

  Further, on the other end side in the longitudinal direction of the switch levers 96a and 96b, switch lever tip portions 96Ca and 96Cb are formed on the surface where the switch levers 96a and 96b face each other. The switch lever tip portions 96Ca and 96Cb are driven by the cam portion 99 (see FIG. 15A) of the large gear 76 (see FIG. 15A) described below by the repulsive force of the detection spring 97 disposed on one end side of the switch levers 96a and 96b. (See FIG. 15A).

  As shown in FIG. 15A, a cam portion 99 is formed on the lower surface of the large gear 76 coaxially with the large gear 76 (large gear central shaft 77). The cam portion 99 is a substantially disk-shaped member having two peripheral surfaces with different diameters and having a thickness. The first peripheral surface 99a has a large diameter, and the first peripheral surface 99a has a smaller diameter than the first peripheral surface 99a. And a double circumferential surface 99b.

  When the cam portion 99 rotates together with the large gear 76, the switch lever tip portions 96Ca and 96Cb are in sliding contact with the first peripheral surface 99a and the second peripheral surface 99b.

  That is, when the switch lever tip 96Ca slides on the first peripheral surface 99a, the switch protrusion 96Ab of the switch lever 96a is separated from the detection switch 95a and turned off. When the switch lever tip 96Ca slides on the second peripheral surface 99b, the switch protrusion 96Ab of the switch lever 96a contacts the detection switch 95a and the switch is turned on.

  When the switch lever tip 96Cb slides on the first peripheral surface 99a, the switch protrusion 96Ab of the switch lever 96b is separated from the detection switch 95b and turned off. When the switch lever tip 96Cb is slidably contacted with the second peripheral surface 99b, the switch protrusion 96Ab of the switch lever 96b comes into contact with the detection switch 95b and the switch is turned on.

  That is, the first peripheral surface 99a of the cam portion 99 forms an OFF surface, and the second peripheral surface 99b forms an ON surface.

  At the origin position shown in FIG. 15A, the switch lever tip portions 96Ca and 96Cb are both in contact with the first peripheral surface 99a (OFF surface), and the switch levers 96a and 96b have moved in the direction indicated by solid arrows. In this state, the switch protrusions 96Aa and 96Ab push and contract the detection spring 97 and are displaced in a direction away from the detection switches 95a and 95b, so that both the detection switches 95a and 95b are turned off.

  When the large gear 76 rotates from the origin position and the switch lever tip portions 96Ca and 96Cb move from the first peripheral surface 99a (OFF surface) to the second peripheral surface 99b (ON surface), the switch levers 96a and 96b are detected springs. The switch projections 96Aa and 96Ab push the detection switches 95a and 95b to turn on both the detection switches 95a and 95b.

  In the present embodiment, the action of pressing the two switch levers 96a and 96b against the respective detection switches 95a and 95b to turn them on can be realized by the single detection spring 97.

  That is, when the large gear 76 is rotated, the cam portion 99 is rotated, so that the switch levers 96a and 96b are rotated, and the detection switches 95a and 95b can be turned ON / OFF according to the rotation angle of the large gear 76.

  Next, the positional relationship among the large gear 76, the intermittent drive gears 78a and 78b, the cam portion 99, and the switch levers 96a and 96b will be described.

  FIGS. 16A to 16F are plan views schematically showing the positional relationship among the large gear, the intermittent drive gear, and the switch lever in the rotating door opening device. 16 (a) to 16 (f), the large gear 76 is rotated clockwise to rotate the left intermittent drive gear 78a, and the left pushing member 61a is projected to open the left door 2a. The operation | movement which performs door operation | movement is shown. 16A to 16F, only the sliding surface 76C of the large gear 76, the recess 76D, and the tooth 76A of the portion related to the driving of the intermittent drive gear 78 are shown.

  FIG. 16A shows the state of the “origin position”, and the intermittent drive gears 78a and 78b are in a state where the tips of the stopper portions 80a and 80b are fitted and locked with the sliding surface 76C. The switch lever tip portions 96Ca and 96Cb are in contact with the first peripheral surface 99a (OFF surface) of the cam portion 99, and the detection switches 95a and 95b are both OFF (hereinafter, this state is referred to as “detection”. It may be referred to as “switch A / B = OFF / OFF”).

  FIG. 16B shows a state of “moving outside the origin” in which the large gear 76 is rotated clockwise by an angle θ1 from the “origin position”. The intermittent drive gears 78a and 78b have the tips of the stopper portions 80a and 80b at the tips. The sliding surface 76C is fitted and locked. Further, the switch lever tip 96Ca is in contact with the first peripheral surface 99a (OFF surface) of the cam portion 99, and the detection switch 95a is OFF. The switch lever tip 96Cb moves from the first peripheral surface 99a (OFF surface) of the cam portion 99 to the second peripheral surface 99b (ON surface), and the detection switch 95b is switched from OFF to ON. That is, the position in FIG. 16B indicates the boundary portion of the “origin range”. Here, the recess 76Da moves to a position close to the stopper end 80Aa in the stopper 80a of the intermittent drive gear 78a (hereinafter, this state may be referred to as “detection switch A / B = OFF / ON”). .

  FIG. 16C shows a state where the large gear 76 is further rotated to an angle θ2 (> θ1). That is, when the stopper portion 80a of the intermittent drive gear 78a enters the recess 76Da, the locked state is released, and the large gear 76 can be engaged with the intermittent drive gear 78a ("intermittent gear meshing" state). ). As a result, the intermittent drive gear 78a starts to rotate counterclockwise. At this time, the switch levers 96a and 96b are not changed from the state of FIG. 16B, the detection switch 95a is OFF, and the detection switch 95b remains ON (detection switch A / B = OFF / ON).

  FIG. 16D shows a state in which the large gear 76 is further rotated to an angle θ3 (> θ2), and the intermittent drive gear 78a meshes with the large gear 76 and continues to rotate counterclockwise. . Further, since the rotating plate 73a integrated with the intermittent drive gear 78a also rotates, the pushing member 61a protrudes forward through the connecting plate 65a (“during a protruding operation”). Thereby, the pushing member 61a performs a door opening operation. The switch levers 96a and 96b remain unchanged from the states shown in FIGS. 16B to 16C, the detection switch 95a remains OFF, and the detection switch 95b remains ON (detection switch A / B = OFF / ON). ).

  FIG. 16E shows a state in which the large gear 76 is further rotated to an angle θ4 (> θ3), and the push-out member 61a protrudes to near the maximum value of its operating range (“protrusion”). Just before completion "state). The intermittent drive gear 78a is at a position that is rotated to the maximum. The switch lever tip 96Ca moves from the first peripheral surface 99a (OFF surface) of the cam portion 99 to the second peripheral surface 99b (ON surface), and the detection switch 95a is switched from OFF to ON. The detection switch 95b does not change and remains ON. It is detected that the detection switch 95a is switched from OFF to ON (hereinafter, this state may be referred to as “detection switch A / B = ON / ON”). At this time, if energization of the motor 82 is stopped, the motor 82 stops while decelerating.

  FIG. 16 (f) shows a state where the large gear 76 has further rotated to an angle θ 5 (> θ 4), the motor 82 stops, and the pushing member 61 a completes the protruding operation and stops (“projection completion stop”). "State). The large gear 76 and the intermittent drive gear 78a are in the most rotated position. The switch levers 96a and 96b are not changed from the state shown in FIG. 16E, and both the detection switches 95a and 95b remain ON (detection switches A / B = ON / ON).

  Thereafter, the revolving door opening device 60 rotates the large gear 76 in the counterclockwise direction by rotating the motor 82 in the reverse direction, thereby performing the operation from FIG. 16 (f) to FIG. 16 (a). Then go back to "origin position" again.

<Configuration of control system circuit>
Next, the configuration of a control system for controlling the drawer door opening device 500 and the rotary door opening device 60 will be described.

  As described above, the control board 41 (see FIG. 2) is attached to the upper surface side of the ceiling wall of the refrigerator 1.

  FIG. 17 is a circuit diagram showing a configuration of a control system of the door opening device. As shown in FIG. 17, on the control board 41 of the refrigerator 1, a motor drive circuit 53 for driving the filter circuit 42, the converter circuit 45, the switching power supply circuit 52, the control device 50C, and the opening devices 500, 60 from the commercial power source, The motor current detection means 50b and the circuit changeover switch part 54 are provided. Although an inverter circuit and a compressor are connected to the output side of the converter circuit 45, they are omitted in FIG. In addition, signals from the door switches 48a, 48b, and 49 are input to the control device 50C. In addition to this, the control device 50C individually drives the door sensor 49, the temperature sensors 44, 45, 46, 47, the control panel 40, the refrigerating temperature zone cool air control means 20, and the freezing temperature zone cool air control means 21. Each drive motor is connected, but is omitted in FIG.

  The filter circuit 42 filters the AC voltage supplied from the commercial power source and outputs it to the converter circuit 45. The converter circuit 45 includes a rectifier circuit 43 that rectifies the filtered AC voltage and converts it into a DC voltage, and a smoothing circuit 44 that smoothes the DC voltage converted by the rectifier circuit 43.

  In the switching power supply circuit 52, the DC voltage generated by the converter circuit 45 is applied to the primary side, a DC voltage lower than the DC voltage is generated as a control power supply, and is output to the secondary side. The switching power supply circuit 52 generates a plurality of types of DC voltages, for example, 12V and 5V as internal power supplies and 15V and 5V as inverter power supplies and outputs them to the secondary side. Output of 12V and 5V DC voltage of the power supply to the secondary side is indicated. In this case, the DC voltage of 12V is connected as the power source of the motor drive circuit 53, and the DC voltage of 5V is connected as the power source of the control device 50C. The motor drive circuit 53 is driven by a signal output from the control device 50C. . Furthermore, the voltage output when the motor drive circuit 53 is driven is connected in parallel so that it can be applied to the motors 600 and 82 of the door opening devices 500 and 60. However, in order to prevent overcurrent due to simultaneous energization of the motors 600 and 82, the circuit switching switch section 54 of the C contact is connected to the output + side of the motor drive circuit 53 in two stages. It is configured to prevent energization. Each circuit changeover switch unit 54 is connected to the control device 50C. The control device 50C constantly monitors the signals of the door switches 48a, 48b, and 49. When a switch input is received, a predetermined circuit is supplied from the control device 50C. A signal is output to the changeover switch unit 54 for control.

  Here, the C contact is a combination of the A contact and the B contact. The A contact is normally open, and electricity is not flowing in the circuit, and the contact is connected by switching and electricity flows. In contrast to the A contact, the B contact is normally closed and electricity flows through the circuit, and when the switch is switched, the contact is released and the circuit opens.

  In addition, according to the said Example, the three door opening apparatuses 500 and 60 can be controlled by the two circuit changeover switch parts 54 by connecting the circuit changeover switch part 54 in two steps. As a result, the number of switching means is reduced as compared with the prior art, resulting in an inexpensive configuration. Further, the circuit changeover switch unit 54 is not limited to two stages, and it is effective to increase or decrease in accordance with the number of door opening devices.

  In the present embodiment, the refrigerator compartment doors 2a and 2b are opened by a rotating door opening device 60 driven by a single motor (first drive source 82). The lower freezer compartment door 5a and the vegetable compartment door 6a are opened by a plurality of drawer door opening devices (door opening devices) 500, 500 corresponding to the doors driven by the second drive source (motor) 24, respectively.

  Then, in one circuit changeover switch unit 54, switching of whether or not the rotary door opening device 60 is driven is performed, and in another circuit changeover switch unit 54 connected in series with the one circuit changeover switch unit 54, The driving of drawer door opening devices (door opening devices) 500 and 500 for opening the lower freezer compartment door 5a and the vegetable compartment door 6a is switched.

  Next, the internal configuration of the motor drive circuit 53 will be described.

  The motor drive circuit 53 shown in FIG. 17 includes four drive elements 55 such as bipolar transistors or MOSFETs, and the connection is an H-bridge connection. Thus, the direction of rotation of the motor can be changed by changing the polarity of the voltage applied to each of the motors 600 and 82.

  Specifically, each of the four drive elements 55 is controlled by a signal from the control device 50C. If the control device 50C operates the A-connection and D-connection drive elements 55 in the figure, the motor drive circuit 53 A current flows in the direction of the solid arrow from the 12V power supply, and the motor side is output from the + terminal. On the contrary, when the drive element 55 of B connection and C connection is operated in the figure, current flows from the 12V power source of the motor drive circuit 53 in the direction of the broken line arrow, and the motor side is output from the-terminal. Therefore, since the current flow changes, the polarity of the voltage applied to the motor can also change.

  In addition, the rotation direction of the motor is changed in the case of the refrigerating compartment doors 2a and 2b having the double doors divided into the left and right, as described above, and in the case of the drawer doors 5a and 6a, the door that opens in the rotation direction of the motor can be selected. This is to adopt a configuration in which an opening operation and a closing operation can be selected in the rotation direction of the motor.

  Further, when the current generated when the motor is driven flows to the GND (0 V) via the motor current detection means 56, the detected current amount can be fed back to the control device 50C. (Not shown) This makes it possible to control by changing the energizing time or energizing rate of the motor in accordance with the above-described weight of the door, the close contact state of the door packing 15, and the load amount that varies depending on the storage capacity.

  In the above embodiment, the revolving door that rotates around the revolving shaft to open and close the storage chamber 2, the drawer door that moves back and forth to open and close the storage chamber, and the revolving that opens the revolving door. A signal from at least one of a door opening device, a drawer door opening device that opens the drawer door, a plurality of opening switches that respectively instruct the opening of the rotating door and the drawer door, and a plurality of opening switches. And a control unit that receives and controls the pivot door opening device or the drawer door opening device, the pivot door opening device including a first drive source, and the drawer door opening device serving as a second drive. A drive circuit that drives the first drive source and the second drive source in common, and a circuit changeover switch unit that switches an output path of the drive circuit. The first drive source and the second drive by contact Switching the current path to. Thereby, a plurality of doors can be opened while simplifying the drive circuit.

  In addition, a plurality of the second drive sources are provided, and the number of the circuit changeover switch units that is one less than the total number of the first drive sources and the second drive sources is provided in series. Thereby, drive switching can be efficiently performed corresponding to the drive source of each door.

  The drive circuit includes four control elements, and the control element has an H-bridge circuit configuration, and the normal rotation is achieved by changing the polarity of the voltage supplied to the first drive source and the second drive source. Or reverse. Thereby, a drive circuit can be simplified more and each door can be opened efficiently.

  Next, the refrigerator of 2nd Embodiment of this invention is demonstrated using FIG. FIG. 18 is a time chart of control of the refrigerator according to the second embodiment of the present invention. The second embodiment is different from the first embodiment in the points described below, and the other points are basically the same as those in the first embodiment, and thus redundant description is omitted.

  As a feature of the second embodiment, protection control for reliability will be described. As for reliability, when the user tries to open the lower freezer compartment door 5a or the vegetable compartment door 6a with the drawer opening device (door opening device) 500, 500, the circuit changeover switch unit 54 is switched for some reason. If not, current flows to the side where the refrigerator doors 2a and 2b are opened, and the rotary door opening device 60 is driven. Therefore, the case where the door (refrigeration room door 2a, 2b) which a user does not intend opens is assumed. Therefore, if the rotating door opening device 60 that opens the refrigerator compartment doors 2a and 2b is operated during the operation of the lower freezer compartment door 5a or the vegetable room door 6a, the operation of the rotating door opening device 60 is stopped.

Next, details of the condition that the door unintended by the user opens will be described below.
For the circuit changeover switch unit 54 connected to the revolving door opening device 60 that opens the refrigerating compartment doors 2a and 2b shown in FIG. If the switch contact is connected to the revolving door opening device 60 side, contact welding or signal path disconnection or the like occurs from the control device 50C side. In such a case, the circuit selector switch unit 54 cannot perform switching. Further, the control device 50 </ b> C outputs a signal to the circuit selector switch unit 54 and simultaneously outputs a signal to the motor drive circuit 53. The voltage generated from the drive circuit is applied to the motor 82 of the rotary door opening device 60 via the circuit changeover switch unit 54 in a state where it cannot be switched due to a failure. Therefore, in this state, when the user operates each door switch 49 provided in the doors 5a, 6a other than the refrigerator compartment doors 2a, 2b, the control device 50C attempts to open the doors 5a, 6a, the circuit changeover switch 54, the motor drive circuit. 53, the refrigerator compartment doors 2a and 2b which are not intended by the user are actually opened.

  Next, protection control for avoiding the above state will be described.

  FIG. 18 shows a control time chart of the opening operation and the closing operation for preventing the half door when the door switches 49 provided in the doors 5a and 6a are pressed.

  First, the protection control of the opening operation will be described with reference to FIG. When each door switch 49 is pressed ((A) in FIG. 18 (a)), a switching command is normally sent to the circuit changeover switch unit 54. The circuit changeover switch unit 54 is connected to the motor 82 on the rotating door opening device 60 side. Then, after the drive waiting time t4 has elapsed, the motor drive circuit 53 performs forward rotation of the motor 82 by an output signal from the control device 50C as in normal control ((B) in FIG. 18A). The rotating door opening device 60 including the motor 82 includes detection switches 95a and 95b for detecting the position when the motor 82 rotates as shown in FIG. FIG. 16B shows a “moving outside the origin” state in which the large gear 76 rotates clockwise by an angle θ1 from the “origin position”. In this case, the detection switch 95b is switched from OFF to ON. At this time, the pushing member 61a does not protrude.

  Next, returning to FIG. 18, the control device 50C constantly monitors the input signal states of the detection switches 95a and 95b described in FIG. The Hi signal is input in the switch OFF state, and the signal changes to the Lo signal in the ON state. When the motor 82 enters the state shown in FIG. 16B ((C) in FIG. 18A), the signal of the detection switch 95b input to the control device 50C changes from the Hi signal to the Lo signal. When there is a change in the detection switch, the control device 50C immediately switches the control signal to the motor drive circuit 53 to stop ((D) in FIG. 188a).

  In addition, the closing operation in FIG. 18B changes the detection switch 95a by outputting an output signal from the control device 50C in the reverse rotation direction with respect to the opening operation in FIG. Even in this case, the control device 50C immediately switches the control signal to the motor drive circuit 53 to stop ((D) in FIG. 18B).

  In addition, according to this embodiment, even if the circuit changeover switch 54 breaks down, it is possible to avoid the door unintended by the user from being opened by the detection switch provided in the door opening device 60.

  In the above embodiment, the drive mechanism includes the detection switch unit that changes depending on the drive state of the first drive source or the second drive source, and the control unit changes a predetermined signal from the detection switch unit. If there is, the drive circuit is stopped. Thereby, the reliability in the door opening operation can be enhanced while simplifying the drive circuit.

2 Refrigerated room (storage room)
2a Refrigeration room door (revolving door)
2b Refrigeration room door (revolving door)
5 Lower freezer compartment (storage room)
5a Lower freezer compartment door (drawer door)
6 Vegetable room (storage room)
6a Vegetable room door (drawer door)
24 motor (second drive source)
41 Control board (control unit)
48a, 38b Opening switch 49 Opening switch 53 Motor drive circuit (drive circuit)
54 Circuit changeover switch 60 Rotating door opening device (door opening device)
82 Motor (first drive source)
500 Drawer door opening device (door opening device)
700 connecting members

Claims (4)

A pivot door that pivots about a pivot axis to open and close the storage chamber 2;
A drawer door that moves back and forth to open and close the storage room;
A revolving door opening device for opening the revolving door;
A drawer door opening device for opening the drawer door;
A plurality of door opening switches that respectively instruct the opening of the pivot door and the drawer door;
A controller that receives a signal from at least one of the plurality of opening switches and controls the rotating door opening device or the drawer door opening device;
The pivot door opening device includes a first drive source,
The drawer door opening device includes a second drive source,
A drive circuit that drives the first drive source and the second drive source in common, and a circuit selector switch unit that switches an output path of the drive circuit;
The refrigerator, wherein the circuit change-over switch unit switches the energization path to the first drive source and the second drive source by a C contact. A plurality of the second drive sources;
2. The refrigerator according to claim 1, wherein the number of the circuit changeover switch units that is one less than the total number of the first drive source and the second drive source is connected in series.   The drive circuit includes four control elements, and the control element has an H-bridge circuit configuration, and can be rotated forward or backward by changing the polarity of the voltage supplied to the first drive source and the second drive source. The refrigerator according to claim 1, wherein the refrigerator is reversed. The drive mechanism includes a detection switch unit that changes depending on a drive state of the first drive source or the second drive source,
The refrigerator according to any one of claims 1 to 3, wherein the control unit stops the drive circuit when a predetermined signal change occurs from the detection switch unit.