JP5202484B2 - Damper device and refrigerator using the damper device - Google Patents

Description

  The present invention relates to a damper device and a refrigerator using the damper device.

  Conventionally, in each refrigerator having a refrigerated temperature zone and a refrigeration temperature zone, the cold air heat-exchanged by the cooler is blown to each of the storage chambers by a blowing means. In order to control the flow rate of cool air to the air, there is known a configuration that includes an open / close damper device and controls the opening / closing of the damper device.

  As a conventional technique related to a damper device, a technique described in Patent Document 1 shown below is known.

  In Patent Document 1, the contact portion is inclined by inclining the contact portion with the opening / closing body provided on the outer periphery of the opening of the frame so that the side facing the shaft side is higher than the shaft support side of the opening / closing body. A configuration for obtaining a larger opening area than that in the case of not doing so is disclosed.

Japanese Patent Laid-Open No. 2-64381

  The temperature range of the refrigerator compartment is approximately 3 to 5 ° C, and that of the freezer compartment is approximately -18 ° C.

  Therefore, when distributing cold air from a cooler to a refrigerator compartment or a freezer compartment via a cold air duct, it is necessary to switch a cold air flow rate. In view of this, an open / close-type refrigerator compartment cooling damper device and a freezer compartment cooling damper device (hereinafter collectively referred to as “damper device”) are provided to control the flow rate of the cool air by opening and closing them.

  Since the damper device is provided in the cold air duct, it is conceivable to enlarge the opening area when the damper device is opened in order to reduce the blowing resistance. In particular, in recent refrigerators, it is required to increase the volume of the storage space, and it is desirable that the volume of the storage space is not reduced while increasing the opening area.

  On the other hand, if the occupying volume of the cold air duct is reduced too much and the blowing resistance of the cold air is increased, the power consumption of the blower (blower fan) for blowing the necessary cold air is increased, and the energy saving performance may be lowered.

  Therefore, in order to improve the energy saving performance without reducing the volume in the storage space, it is preferable that the cold air duct has a flat shape and the size in the depth direction of the refrigerator is reduced. As a shape of the damper device for that purpose, it is desirable to use a horizontally long and narrow rectangular shape with a small depth dimension and an increased width.

  As an example, when only the freezer compartment is cooled, control is performed such that the refrigerating compartment cooling damper device is closed and the freezer compartment cooling damper device is opened. At this time, if there is a gap in the cold room cooling damper device, cold air also flows into the cold room from the gap. Then, originally, cold air for cooling only the freezer compartment is required, but an additional amount of cooling heat for the cold air leaking into the refrigerator compartment is required.

  As described above, it is desirable to improve the sealing property at the time of closing while increasing the opening area of the damper device. However, when the opening area of the damper device is increased, each part is enlarged, so that the rigidity of the part is reduced and elastic deformation is likely to occur, and in the case of a resin part, deformation such as warping and twisting during molding is also caused. As a result, there is a problem that a gap is easily generated at the time of closing and is difficult to seal. In particular, when the damper open / close body is formed in an elongated rectangular shape, deformation during molding and elastic deformation are likely to occur.

  In the above conventional technique, when the baffle is closed, the baffle is elastically deformed by the driving force (driving torque) applied to the baffle, and the elastic deformation partially causes the baffle and the contact portion provided in the opening to partially move. There was a problem that a gap occurred in the case.

  Accordingly, an object of the present invention is to obtain a damper device with improved reliability for closing an opening. Moreover, it aims at obtaining the refrigerator which improved the energy saving performance by closing the opening of a damper apparatus reliably.

  In order to solve the above-mentioned problems, a damper device according to the present invention is a damper device having an opening / closing body driven by a driving means and a frame in which an opening opened / closed by the opening / closing body is formed. One end of the frame is supported by a drive shaft of the drive means, and the other end of the opening / closing body is supported by a support shaft of the frame provided at a position facing the drive shaft, and the opening of the frame is around the opening. An annular contact portion that contacts the opening / closing body when the opening / closing body is closed is provided, and the height of the contact portion is gradually inclined so that the diagonal position of the drive shaft is higher than the other positions. Features.

  Further, in a damper device including a frame in which a rectangular opening is formed, an opening / closing body that opens and closes the opening, and a driving unit that drives the opening / closing body, the opening / closing body has a rectangular shape larger than the opening. The one end of the long side portion is supported by the drive shaft of the driving means, and the other end of the long side portion is supported by the support shaft of the frame provided at a position facing the drive shaft, A buffer member provided on a surface that comes into contact with the frame when the frame is closed, and a contact portion provided at a position around the opening of the frame and in contact with the buffer member. Is characterized in that it has a slope protruding toward the buffer member so that the diagonal position of the drive shaft becomes gradually higher than other positions.

  The refrigerator according to the present invention includes a storage chamber provided in the refrigerator main body, a cooler chamber provided behind the storage chamber and provided with a cooler, and a blower for blowing cool air from the cooler chamber to the storage chamber. And a damper device that controls a supply amount of the cold air blown by the blower to the storage chamber, wherein the damper device is opened and closed by the driving means, and is opened and closed by the opening and closing member. A frame having a rectangular opening formed thereon, one end of the opening / closing body is supported by a driving shaft of the driving means, and the other end of the opening / closing body is provided at a position facing the driving shaft. Further, an annular contact portion is provided around the opening of the frame and is in contact with the opening / closing body when the opening / closing body is closed. The diagonal position of the shaft is higher than the other positions. And wherein the intoxicated was gradually inclined.

  A storage chamber provided in the refrigerator main body, a cooler chamber provided behind the storage chamber and provided with a cooler, a blower for blowing cool air from the cooler chamber to the storage chamber, and the blower In a refrigerator comprising a damper device that controls the amount of cool air blown into the storage chamber, the damper device includes a frame in which a rectangular opening is formed, an opening / closing body that opens and closes the opening, Driving means for driving the opening / closing body, wherein the opening / closing body has a rectangular shape larger than the opening, one end of the long side portion is supported by the drive shaft of the driving means, and the other end of the long side portion Is supported by a support shaft of the frame provided at a position facing the drive shaft, and a buffer member provided on a surface that comes into contact with the frame when the opening / closing body is closed, and around the opening of the frame And the buffer member contacts It includes a contact portion provided on the location, and the contact portion is characterized by having a slope of diagonal positions of the drive shaft is protruded to the buffer member side such that gradually becomes higher than other positions.

  The present invention can provide a damper device with improved reliability for closing an opening. Moreover, the refrigerator which improved energy saving performance can be obtained by closing the opening of a damper apparatus reliably.

It is a front external view of the refrigerator which concerns on embodiment of this invention. It is XX sectional drawing of FIG. 1 showing the structure in the store | warehouse | chamber of a refrigerator. It is a front view showing the structure in the store | warehouse | chamber of a refrigerator. FIG. 3 is an enlarged explanatory view of a main part of FIG. 2. It is a perspective view which shows the whole structure of a damper. It is a perspective view which shows the whole structure of a damper. FIG. 6 is a YY sectional view of FIG. 5 showing the configuration of the damper. It is the schematic which looked at the drive means of the damper in the arrow Z direction of FIG. It is the schematic which looked at the drive means of the damper in the arrow Z direction of FIG. It is the schematic which looked at the drive means of the damper in the arrow Z direction of FIG. It is the schematic which looked at the drive means of the damper in the arrow Z direction of FIG. It is a perspective view which shows the whole structure of a damper. FIG. 13 is a schematic diagram illustrating a distribution state of a pressing force generated between the opening / closing body and the contact portion, as viewed in the direction of the arrow W in FIG. 12. It is a perspective view which shows the structure of the stopper which suppresses a deformation | transformation of the opening-closing body of the damper by this invention. It is VV sectional drawing of FIG. 14, and shows the closed state of an opening-closing body.

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

  FIG. 1 is a front outline view of the refrigerator of the present embodiment. FIG. 2 is an XX longitudinal cross-sectional view in FIG. 1 illustrating a configuration inside the refrigerator. FIG. 3 is a front view showing the configuration of the refrigerator interior, and FIG. 4 is an enlarged explanatory view of the main part of FIG. 2, showing the arrangement of cold air ducts and air outlets.

  As shown in FIG. 1, the refrigerator 1 of this embodiment has the refrigerator compartment 2, the ice making room 3, the upper freezer compartment 4, the lower freezer compartment 5, and the vegetable compartment 6 from upper direction. As an example, the refrigerator compartment 2 and the vegetable compartment 6 are storage rooms in a refrigerator temperature zone of approximately 3 to 5 ° C. Further, the ice making room 3, the upper freezing room 4 and the lower freezing room 5 are storage rooms in a freezing temperature zone of approximately −18 ° C.

  The refrigerating room 2 includes, on the front side, refrigerating room doors 2a and 2b with double doors (so-called French type) divided into left and right. The ice making room 3, the upper freezing room 4, the lower freezing room 5, and the vegetable room 6 include a drawer type ice making room door 3a, an upper freezing room door 4a, a lower freezing room door 5a, and a vegetable room door 6a. Hereinafter, the refrigerator compartment doors 2a and 2b, the ice making compartment door 3a, the upper freezer compartment door 4a, the lower freezer compartment door 5a, and the vegetable compartment door 6a are simply referred to as doors 2a, 2b, 3a, 4a, 5a, and 6a.

  The refrigerator 1 includes a door sensor (not shown) that detects the open / closed state of the doors 2a, 2b, 3a, 4a, 5a, and 6a, and a state in which each door is determined to be open for a predetermined time, for example, An alarm (not shown) for notifying the user when the operation is continued for one minute or more and a temperature setting device (not shown) for setting the temperature of the refrigerator compartment 2 and the temperature of the upper freezer compartment 4 and the lower freezer compartment 5 Etc.

  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 has a plurality of vacuum heat insulating materials 25 mounted thereon.

  The inside of the refrigerator is separated from the refrigerator compartment 2 by the heat insulating partition wall 28, the upper freezing chamber 4 and the ice making chamber 3 (see FIG. 1, the ice making chamber 3 is not shown in FIG. 2). The lower freezer compartment 5 and the vegetable compartment 6 are separated.

  A plurality of door pockets 32 are provided inside the doors 2a and 2b (see FIGS. 1 and 2).

  The refrigerator compartment 2 is partitioned into a plurality of storage spaces in the vertical direction by a plurality of shelves 36.

  As shown in FIG. 2, the upper freezer compartment 4, the lower freezer compartment 5, and the vegetable compartment 6 are integrated with doors 3a, 4a, 5a, 6a provided in front of the respective compartments, and storage containers 3b, 4b, 5b. , 6b are provided. 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, the ice making chamber 3 shown in FIG. 1 is provided with an unillustrated storage container (indicated by (3b) in FIG. 2) integrally with the door 3a. The container 3b can be pulled out by pulling it out.

  As shown in FIG. 2 (see FIG. 3 as appropriate), the cooler 7 is provided in a cooler storage chamber 8 provided substantially at the back of the lower freezing chamber 5. An internal fan 9 (blower) is provided above the cooler 7.

  Air cooled by heat exchange in the cooler 7 (hereinafter, low-temperature air heat-exchanged by the cooler 7 is referred to as “cold air”) is blown into the refrigerator compartment air duct 11 by the internal fan 9, and the vegetable room air blown by reference numerals. Refrigeration room 2, vegetable room 6, upper freezer room 4, lower freezer room 5, ice making through duct (see FIG. 3), upper freezer room air duct 12, lower freezer room air duct 13, and ice making room air duct (not shown) It is sent to each room of room 3. Air blowing to each room is controlled by opening and closing the refrigerator compartment damper 20 and the freezer compartment damper 50.

  Incidentally, the air ducts to the refrigerator compartment 2, the ice making room 3, the upper freezer room 4, the lower freezer room 5, and the vegetable room 6 are provided on the back side of each room of the refrigerator 1 as indicated by broken lines in FIG. Yes.

  Specifically, when the refrigerator compartment damper 20 is in the open state and the freezer compartment damper 50 is in the closed state, the cold air is sent to the refrigerator compartment 2 from the outlets 2c provided in multiple stages via the refrigerator compartment air duct 11. And it sends to the vegetable compartment 6 from the blower outlet 6c through the vegetable compartment ventilation duct (refer FIG. 3) branched from the refrigerator compartment ventilation duct 11. FIG.

  Note that the cold air that has cooled the refrigerator compartment 2 is, for example, in the lower right portion as viewed from the front of the cooler storage chamber 8 through the refrigerator outlet return duct 16 from the return port 2d provided on the lower surface of the refrigerator compartment 2. Return. The return air from the vegetable compartment 6 returns to the lower part of the cooler storage compartment 8 through the return opening 6d.

  When the freezer damper 50 is in the open state, the cold air heat-exchanged by the cooler 7 passes through the ice making chamber air duct and the upper freezer room air duct 12 (not shown) by the internal blower 9, and the ice making chambers from the outlets 3c and 4c, respectively. 3. The air is blown into the upper freezer compartment 4. Further, the air is blown from the outlet 5 c to the lower freezer compartment 5 through the lower freezer compartment air duct 13. In this respect, the freezer compartment damper 50 is attached above a blower cover 56 described later, and facilitates the previous ice making chamber blow.

  In addition, the cold air that has cooled the upper freezer room 4, the lower freezer room 5, and the ice making room 3 returns to the cooler storage room 8 through the freezer return port 17 provided in the lower part of the lower freezer room 5.

  Thus, in FIG. 4, it is the partition 54 that forms the outlets 3c, 4c, 5c. The partition 54 divides the freezing room 4, the ice making room 3, the lower freezing room 5, and the cooler storage room 8.

  55 is a fan motor fixing | fixed part to which the internal fan 9 is attached. The fan motor fixing portion 55 partitions the cooler storage chamber 8 and the partition 54.

  The internal fan 9 is attached to the fan motor fixing portion 55. A blower cover 56 covers the front surface of the internal fan 9. A cool air duct 13 is formed between the blower cover 56 and the partition 54. Further, the upper portion of the blower cover 56 forms a blowout port 56 a of the freezer compartment damper 50.

  The blower cover 56 includes a rectifying unit 56 b that covers the front surface of the blower 9. This rectifies the turbulent flow caused by the cold air blown out and prevents the generation of noise and the like.

  The blower cover 56 forms an upper freezer compartment air duct 12 and a lower freezer compartment air duct 13 so as to guide the cool air blown from the internal fan 9 to the outlets 3c, 4c, 5c, etc. between the blower cover 56 and the partition 54. doing.

  Further, the blower cover 56 also plays a role of blowing the cool air blown out by the internal blower 9 to the refrigerator compartment damper 20 side. That is, the cold air that does not enter the freezer damper 50 provided in the blower cover 56 part goes to the refrigerating room damper 20 side through the refrigerating room duct 15 as shown in FIG.

  And the cold air which passed through the cooler 7 is sent to both the freezing temperature zone room (the upper freezing room 4, the lower freezing room 5, and the ice making room 3) and the refrigeration temperature zone room (the refrigeration room 2 and the vegetable room 6). In some cases, the cool air is overwhelmingly sent to the freezer damper 50 side, but a slight amount of cool air goes to the refrigerating chamber duct 15 side.

  The refrigerator compartment damper 20 is attached to the rear part of the refrigerator compartment 2 as shown in FIG.

  A defrost heater 22 is installed below the cooler 7, and an upper cover 53 is provided above the defrost heater 22 to prevent defrost water from dripping onto the defrost heater 22. It has been.

  The defrost water generated by the defrosting (melting) of the frost attached to the wall of the cooler 7 and the surrounding cooler storage chamber 8 flows into the trough 23 provided at the lower part of the cooler storage chamber 8. It reaches the evaporating dish 21 disposed in the machine room 19 described later via the drain pipe 27 and is evaporated by the heat of a condenser (not shown) described later.

  Further, a cooler temperature sensor 35 attached to the cooler is shown in the upper right portion when viewed from the front of the cooler 7, a refrigerating room temperature sensor 33 is provided in the refrigerating room 2, and a freezing room temperature sensor 34 is provided in the lower freezing room 5. The temperature of the cooler 7 (hereinafter referred to as “cooler temperature”), the temperature of the refrigerator compartment 2 (hereinafter referred to as “refrigerator compartment temperature”), the temperature of the lower freezer compartment 5 (hereinafter referred to as “freezer compartment temperature”). Can be detected).

  Furthermore, the refrigerator 1 includes an outside air temperature sensor and an outside air humidity sensor (not shown) that detect a temperature and humidity environment (outside air temperature, outside air humidity) outside the refrigerator. Note that the vegetable room temperature sensor 33a may also be arranged in the vegetable room 6.

  A machine room 19 is provided on the lower back side of the heat insulating box 10. The machine room 19 contains a compressor 24 and a condenser (not shown). Is removed.

  A control board 31 on which a CPU, a memory such as a ROM and a RAM, an interface circuit, and the like are mounted is disposed on the top surface side of the refrigerator 1. The control board 31 opens and closes the doors of the outside temperature sensor, the outside humidity sensor, the cooler temperature sensor 35, the refrigerator temperature sensor 33, the freezer temperature sensor 34, and the doors 2a, 2b, 3a, 4a, 5a, and 6a. The door sensor for detecting the state, the temperature setter (not shown) provided on the inner wall of the refrigerator compartment 2, the temperature setter (not shown) provided on the inner wall of the lower freezer compartment 5, and the like are connected. And by the program previously installed in the ROM, the compressor 24 is turned on / off, the number of revolutions is controlled, the refrigerator motor 20 and the freezer damper 50 are individually driven. Control such as ON / OFF of the blower 9 and control of the rotational speed, control of ON / OFF of the external fan and control of the rotational speed, and control of ON / OFF of the alarm for notifying the door open state are performed.

  Next, when the refrigerating room damper 20 is closed and the freezing room damper 50 is open, only the freezing temperature zone (the ice making room 3, the upper freezing room 4 and the lower freezing room 5) is cooled. The cold air blown to the ice making chamber 3 through the ice making chamber air duct and the cold air blown to the upper freezer chamber 4 via the upper freezer chamber air duct 12 (see FIG. 2) descend to the lower freezer chamber 5. And it flows like the freezing room return air shown by the arrow C in FIG. 4 with the cold air sent to the lower freezing room 5 through the lower freezing room ventilation duct 13 (refer FIG. 2). That is, it flows into the cooler storage chamber 8 from the lower front of the cooler storage chamber 8 via the freezer return port 17 arranged at the lower back of the lower freezer chamber 5, and a large number of fins are attached to the cooler piping 7a. Heat exchange is performed with the cooler 7 configured as described above.

  Incidentally, the width of the freezer compartment return port 17 is substantially equal to the width of the cooler 7.

  On the other hand, when the refrigerator compartment damper 20 is in the open state and the freezer compartment damper 50 is in the closed state, and only the refrigerator compartment temperature zone (refrigerator compartment 2 and vegetable compartment 6) is being cooled, the return from the refrigerator compartment 2 is performed. The cold air flows into the cooler storage chamber 8 from the lower side of the cooler storage chamber 8 via the cooler chamber return duct 16 like the cooler return air indicated by the arrow D in FIG. Exchange heat with.

  The cold air that has cooled the vegetable compartment 6 flows into the lower part of the cooler storage chamber 8 via the vegetable compartment return port 6d (see FIG. 4), as shown in FIG. Less than the amount of air circulating and the amount of air circulating through the refrigerator compartment 2.

  As described above, the cold air in the refrigerator 1 is switched by appropriately opening and closing each of the refrigerator compartment damper 20 and the freezer compartment damper 50. Next, an example of the configuration and operation of the damper will be described using the freezer compartment damper 50 as an example with reference to FIGS.

  FIG. 5 is a perspective view showing an example of the configuration of the freezer compartment damper 50. FIG. 6 is a view of FIG. 5 as seen from the direction of the arrow S. 7 is a cross-sectional view in the YY direction in FIG.

  The freezer compartment damper 50 is provided with an opening 62 on one side, for example, a horizontally long frame 63 made of resin, for example, and a drive system such as a motor and a reduction gear at one end (rectangular short portion) of the frame 63. A built-in driving means 60 is provided, and a driving force is output from the driving shaft 61. The opening / closing body 64 is provided facing the opening 62 of the frame 63, one end of the opening / closing body 64 is pivotally supported by the drive shaft 61, and the other end of the opening / closing body 64 is provided at the other end of the frame 63. The support shaft 65 is rotatably provided.

  The opening / closing body 64 includes a resin-like plate-like opening / closing plate 64a and a buffer member 64b formed on one surface of the opening / closing plate 64a, for example, from a flexible material such as urethane foam or polyethylene foam.

  The opening / closing body 64 is swingable about a rotation shaft connecting the drive shaft 61 and the support shaft 65, and the rotation shaft is substantially parallel along one side in the longitudinal direction of the opening / closing body 64, It is arranged near the one side.

  The opening 62 of the frame 63 has a horizontally long substantially rectangular shape. A connecting means 62 a for connecting one side and the other side of the opening 62 and suppressing deformation of the opening 62 is provided at a substantially central portion in the longitudinal direction of the opening 62. The connecting means 62a serves as a support column for reinforcement. The connecting means 62a may be integrated with the frame 63 or may be a separate body as long as it suppresses the deformation of the opening 62.

  5 to 7 show a state where the opening / closing body 64 is closed. In the closed position, the opening / closing body 64 comes into contact with a contact portion 66 erected on the opening / closing body 64 side along the inner periphery of the opening 62 of the frame 63. This suppresses the flow of cool air through the opening 62. When the motor is rotated, the opening / closing body 64 is rotated by about 90 ° in the direction of the arrow (see FIGS. 5 and 7) via the drive shaft 61, so that the opening / closing body is in the open position indicated by 64 '. By opening and closing the opening / closing body 64 between the positions, the cool air can pass through the opening 62 in the open position, and the cool air flow is blocked and closed in the closed position.

  Next, an example of the configuration and operation of the driving unit 60 will be described with reference to FIGS. 8 to 11 are schematic views of the driving means 60 viewed in the direction of arrow Z in FIG. The driving means 60 includes a motor 70, and an output shaft 71 of the motor 70 is provided with a pinion gear 72 that rotates with the driving of the motor 70 and outputs torque. The idler gear 73 is a reduction gear that is rotatably supported around an idler fulcrum 74. A gear 73a meshing with the pinion gear 72 is provided on the outer periphery of the idler gear 73, and the torque from the pinion gear 72 is transmitted while being reduced. A part of the idler gear 73 is provided with a partial gear 73b. For example, the idler gear 73 is provided only in a range where the idler gear 73 rotates 90 °. A cylindrical portion 73c having a cylindrical shape is provided in a portion of the partial gear 73b other than the gear shape.

  The output gear 75 is pivotally supported around the drive shaft 61, and the drive shaft 61 is fitted to the opening / closing body 64. The opening / closing body 64 (opening / closing plate 64a, buffer member 64b) and the output gear 75 are connected to each other. It is connected and rotates as a unit. That is, the opening / closing body 64 is rotated around a longitudinal driving shaft of the opening / closing body 64 (a driving shaft in which one end of the opening / closing body 64 is pivotally supported by the driving shaft 61 and the other end is pivotally supported by the supporting shaft 65 of the frame 63). To drive.

  A partial gear 75 b is provided in a part of the output gear 75, meshes with a partial gear 73 b provided in a part of the idler gear 73, and rotates by, for example, 90 ° in conjunction with the idler gear 73. On both sides of the partial gear 75b of the output gear 75, an arc-shaped first stopper 75c and a second stopper 75d are provided.

  The first stopper 75c and the second stopper 75d are in a positional relationship in which the opening / closing body 64 contacts the cylindrical portion 73c of the idler gear 73 at the open position and the closed position. When the output gear 75 is rotated by approximately 90 °, which is a range where the partial gear 75b is engaged, the opening / closing body 64 connected to the output gear 75 is rotated, and then the first stopper 75c and the second stopper 75d. Comes into contact with the idler gear 73 and its rotation is restricted.

  Next, the operation of the driving unit 60 will be described. In FIG. 8, the driving means 60 shows a state similar to that shown in FIGS. 5 to 7, with the opening / closing body 64 in the closed state. A cylindrical portion 73c provided on the idler gear 73 is fitted with the second stopper 75d of the output gear 75, and holds the opening / closing body 64 in a closed state. FIG. 9 shows a state in which the motor 70 is driven from the state of FIG. 8 and the pinion gear 72, idler gear 73, and output gear 75 are rotated in the directions of the arrows, respectively, and the partial gear 75b and idler gear 73 that are part of the output gear 75. Is engaged with a partial gear 73b provided at a part of the gear.

  The second stopper 75 d of the output gear 75 is positioned away from the cylindrical portion 73 c of the idler gear 73. FIG. 10 shows a position rotated further in the direction of the arrow as compared with FIG. In FIG. 11, the rotation of the partial gear 75b, which is a part of the output gear 75, and the partial gear 73b provided in a part of the idler gear 73 are finished, and the first gear of the output gear 75 is turned. One stopper 75c is in a position where it is engaged with the cylindrical portion 73c of the idler gear 73, and holds the opening / closing body 64 in an open state.

  When the opening / closing body 64 is closed again, the state shown in FIG. 11 is reached from the state shown in FIG. 11 through the states shown in FIGS.

  By operating as described above, the freezer damper 50 opens and closes the opening / closing body 64.

  As described above, in order to reduce the ventilation resistance of cold air, it is necessary to increase the opening area of the damper. On the other hand, since the rigidity of the damper opening / closing body 64 decreases when the size of the damper is increased, the amount of deformation due to elastic deformation due to the reaction force when the opening 62 is closed or warpage or deflection generated during molding increases, making it difficult to seal the opening 62. There is a problem of becoming.

  This problem will be described in more detail below with reference to FIGS.

  FIG. 12 is a perspective view showing the overall configuration of the damper as in FIG. FIG. 13 is a view in the direction of the arrow W in FIG. 12, and shows the pressure contact force 67 generated between the flexible buffer member 64 b provided on the opening / closing body 64 and the contact portion 66 that is the outer periphery of the opening 62 of the frame 63. 6 is a schematic diagram showing the distribution state as a distribution of arrows perpendicular to the contact portion 66. FIG. A portion with a large arrow indicates that the pressure contact force 67 between the buffer member 64b and the contact portion 66 is large, and a portion with a small arrow indicates that the pressure contact force 67 is small. When the drive torque T is applied to the drive shaft 61, the buffer member 64b of the opening / closing body 64 is pressed against the contact portion 66 of the frame 63 to be recessed, and is held in a state where the drive torque T and the pressure contact force are balanced.

  As described above, the shaft on which the opening / closing body 64 swings is a rotation shaft that connects the drive shaft 61 and the support shaft 65, and the shaft is substantially parallel to one side in the longitudinal direction of the opening / closing body 64. Since it is arranged in the vicinity of one side, the driving torque T applied from the driving means 60 to the opening / closing body 64 via the driving shaft 61 is applied only to the corner of one end of the opening / closing body 64 having a substantially rectangular shape. Become. The opening / closing body 64 has a configuration in which a buffer member 64b is attached to an opening / closing plate 64a, and the buffer member 64b is made of a flexible member such as foamed polyurethane. Then, the driving torque T itself cannot be transmitted, and the strength and rigidity of the opening / closing body 64 are maintained by the opening / closing plate 64a. However, since the opening / closing plate 64a is generally a flat plate-like resin plate, the opening / closing plate 64a is easily elastically deformed with respect to a torsional torque along the longitudinal direction and a bending moment bent in the plate thickness direction.

  Since the driving torque T is applied to the opening / closing body 64 to contact the contact portion 66, the opening / closing body 64 receives a reaction force from the outer periphery of the contact portion 66, and the buffer member 64 b is compressed and recessed by the reaction force. The plate 64a is elastically deformed.

  Therefore, the elastic deformation shape of the opening / closing body 64 when the driving torque T is applied will be described in detail below.

  First, of the contact portion 66 around the opening 62, a portion A which is a corner near the drive shaft 61 on the drive means 60 side, and a support shaft on the opposite side (position away from the drive shaft 61 in the longitudinal direction). When the driving torque T is applied and the opening / closing plate 64a is to be elastically deformed at the corner C in the vicinity of 65, the drive shaft 61 and the support shaft 65 restrict the positions other than the rotational direction. That is, since the movement is restricted, even if the driving torque T is increased, the pressure contact forces 67A and 67C between the buffer member 64b and the opening 62 do not increase. Does not change.

  Next, in the portion D which is farthest from the drive shaft 61 on the drive means 60 side (on the side facing the rotation shaft of the opening / closing body 64), when the driving torque T is applied, the opening / closing body 64 is pressed in the direction of the arrow 80a. It is done.

  For this reason, the pressure contact force 67D in the portion D increases as the drive torque T increases. Since the distance between the A part and the D part is smaller than that in the longitudinal direction, the deformation of the opening / closing body 64 between the A part and the D part is slight, and the drive torque T is increased. The pressure contact force 67D tends to increase.

  Next, in the F section which is on the opposite side of the drive means 60 (position away from the drive shaft 61 in the longitudinal direction) and farthest from the support shaft 65 (on the side facing the rotation axis of the opening / closing body 64), The part is farthest from the drive shaft 61, and the opening / closing body 64 is torsionally deformed by the drive torque T. Therefore, the pressure contact force 67F is small.

  That is, after the buffer member 64b of the opening / closing body 64 and the contact portion 66 contact with a slight pressure contact force 67F, even if the driving torque T is increased, the torque acts to torsionally deform the opening / closing body 64 itself. However, the effect of increasing the F contact pressure 67F is small.

  The elastic deformation of the opening / closing body 64 increases as the size of the opening / closing body 64, that is, the opening area of the opening 62 increases, and the deformation becomes easier as the longitudinal dimension of the opening / closing body 64 increases. . Further, when the opening / closing body 64 is a rectangular shape elongated in the longitudinal direction, the amount of deformation is particularly large.

  Therefore, in the F section which is on the opposite side of the drive means 60 (position away from the drive shaft 61 in the longitudinal direction) and farthest from the support shaft 65 (on the side facing the rotation axis of the opening / closing body 64), the contact portion In the case of the direction of rising from 66, there is a problem that a gap is generated due to warping and cannot be sealed.

  Next, the structure of the freezer compartment damper 50 by this invention is demonstrated using FIG. 14, FIG. FIG. 14 is a perspective view showing the overall configuration of the damper when the opening / closing body 64 is closed. 15 is a cross-sectional view taken along line VV of the opening / closing body 64 of FIG.

  The freezer compartment damper 50 according to the present embodiment is on the opposite side of the drive means 60 (position away from the drive shaft 61 in the longitudinal direction) and farthest from the support shaft 65 (on the side facing the rotation axis of the opening / closing body 64). In the F part, the contact part 66 is made higher than the other points on the rotating body 64 side, and the F part, the C part and the D part are inclined and connected.

  In other words, an annular contact portion 66 that comes into contact with the opening / closing body 64 when the opening / closing body 64 is closed is provided around the opening 62 of the frame 63, and the height of the contact portion 66 is A, C, The F part is made higher than the D part, and a continuous inclined surface is formed from the F part to the C part and the D part.

  That is, in the contact portion 66 provided around the opening 62 of the frame 63 and in contact with the buffer member 64b, the diagonal position (F portion) of the drive shaft 61 is in another position (A portion, B portion and (C section) has a slope protruding toward the buffer member so as to be gradually higher.

  The gap at the F portion of the contact portion 66 generated when the driving torque T is applied to the opening / closing body 64 is a warp when the frame 63 and the opening / closing plate 64a are molded and a reaction force due to the compression of the buffer member 64b. Taking these into consideration, by increasing the height of the F portion of the contact portion 66, the positional relationship is determined so that the buffer member 64b is in contact with the contact portion 66 in an appropriately pressed state. As a result, the opening / closing body 64 is increased in size to have a rectangular shape that is elongated in the longitudinal direction and is easily elastically deformed, or even when the driving torque T increases, the opening / closing body 64 does not float and no gap is generated. Therefore, it is possible to provide a highly reliable freezer compartment damper 50 that can reliably close the entire opening 62 by reducing the influence of variation in dimensions and variation in drive torque T.

1 Refrigerator 2 Refrigerated room (refrigerated temperature zone)
2a, 2b Refrigeration room doors 2c, 3c, 4c, 5c, 6c, 56a Outlet 2d, 6d Return port 3 Ice making room (freezing temperature zone)
3a Ice making room door 3b, 4b, 5b, 6b Storage container 4 Upper freezing room (freezing temperature room)
4a Upper freezer compartment door 5 Lower freezer compartment (freezing temperature zone)
5a Lower freezer compartment door 6 Vegetable room (refrigerated temperature room)
6a Vegetable room door 7 Cooler 7a Cooler pipe 8 Cooler storage room 9 Blower (blower)
DESCRIPTION OF SYMBOLS 10 Heat insulation box 10a Inner box 10b Outer box 11 Refrigeration room ventilation duct 12 Upper stage freezing room ventilation duct 13 Lower stage freezing room ventilation duct 15 Refrigeration room duct 16 Refrigeration room return duct 17 Freezer room return port 19 Machine room 20 Refrigeration room damper 21 Evaporation Plate 22 Defrost heater 23 樋 24 Compressor 25 Vacuum heat insulating material 27 Drain pipe 28, 29 Heat insulation partition wall 31 Control board 32 Door pocket 33 Cold room temperature sensor 33a Vegetable room temperature sensor 34 Freezer room temperature sensor 35 Cooler temperature sensor 36 Shelf 50 Freezer compartment damper 53 Upper cover 54 Partition 55 Fan motor fixing part 56 Blower cover 56b Rectifier 60 Driving means 61 Driving shaft 62 Opening 62a Connecting means 63 Frame 64 Opening and closing body 64a Opening and closing plate 64b Buffer member 65 Support shaft 66 Contacting part 67 Pressure contact force 70 Motor 71 Output shaft 72 Pinion gear 73 Idraghi Gear 73b gear 73b, 75b partial gear 73c cylindrical portion 74 idler fulcrum 75 output gear 75c first stopper 75d second stopper

Claims (4)

In a damper device having an opening / closing body driven by a driving means and a frame in which an opening opened / closed by the opening / closing body is formed,
One end of the opening / closing body is supported by a driving shaft of the driving means, and the other end of the opening / closing body is supported by a support shaft of the frame provided at a position facing the driving shaft,
Around the opening of the frame is provided an annular contact portion that comes into contact with the opening and closing body when the opening and closing body is closed,
The damper device is characterized in that the height of the contact portion is gradually inclined so that the diagonal position of the drive shaft is higher than the other positions. In a damper device comprising a frame in which a rectangular opening is formed, an opening / closing body for opening / closing the opening, and a driving means for driving the opening / closing body,
The opening / closing body has a rectangular shape larger than the opening, one end of the long side portion is supported by the drive shaft of the drive means, and the other end of the long side portion is provided at a position facing the drive shaft. Supported by the frame spindle,
A buffer member provided on a surface that contacts the frame when the opening and closing body is closed;
A contact portion provided around the opening of the frame and at a position where the buffer member contacts,
The damper device according to claim 1, wherein the contact portion has an inclination protruding toward the buffer member so that a diagonal position of the drive shaft is gradually higher than other positions. A storage room provided in the refrigerator body;
A cooler room provided behind the storage room and provided with a cooler;
A blower for blowing cool air from the cooler room to the storage room;
In a refrigerator comprising a damper device that controls a supply amount of cold air blown by the blower to the storage chamber,
The damper device has an opening / closing body driven by driving means, and a frame in which a rectangular opening that is opened / closed by the opening / closing body is formed,
One end of the opening / closing body is supported by a driving shaft of the driving means, and the other end of the opening / closing body is supported by a support shaft of the frame provided at a position facing the driving shaft,
Around the opening of the frame is provided an annular contact portion that comes into contact with the opening and closing body when the opening and closing body is closed,
The refrigerator is characterized in that the height of the contact portion is gradually inclined so that the diagonal position of the drive shaft is higher than the other positions. A storage room provided in the refrigerator body;
A cooler room provided behind the storage room and provided with a cooler;
A blower for blowing cool air from the cooler room to the storage room;
In a refrigerator comprising a damper device that controls a supply amount of cold air blown by the blower to the storage chamber,
The damper device includes a frame in which a rectangular opening is formed, an opening / closing body that opens and closes the opening, and a driving unit that drives the opening / closing body,
The opening / closing body has a rectangular shape larger than the opening, one end of the long side portion is supported by the drive shaft of the drive means, and the other end of the long side portion is provided at a position facing the drive shaft. Supported by the frame spindle,
A buffer member provided on a surface that contacts the frame when the opening and closing body is closed;
A contact portion provided around the opening of the frame and at a position where the buffer member contacts,
The refrigerator is characterized in that the contact portion has a slope projecting toward the buffer member so that the diagonal position of the drive shaft is gradually higher than other positions.

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