JP2010261676A - Damper device and refrigerator including the damper device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem wherein by driving force (driving torque T) for closing a baffle (opening/closing body), the opening/closing body is elastically deformed, and owing to the elastic deformation, a clearance is partially generated between the opening/closing body and an abutment part provided in an opening of a frame, which hinders complete closing. <P>SOLUTION: This damper device has: a frame 63 having a laterally long opening 62; a plate-shaped opening/closing body 64 for opening/closing the opening 62; a driving means 60 for driving the opening/closing body 64 around a drive shaft in the longitudinal direction of the opening/closing body 64; a first projection 81 provided in a portion near the center of the drive shaft of the opening/closing body 64 and extended to a direction opposite to the drive shaft with respect to the opening/closing body 64; and a second projection 82 provided in the frame 63 on the opposite side of the opening 62 with respect to the drive shaft. When the opening/closing body 64 is closed, the first projection 81 and the second projection 82 come into contact with each other and the opening/closing body 64 comes into contact with the edge of the opening 62. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a damper device and a refrigerator provided with 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 conventional techniques related to the damper device, techniques described in Patent Document 1 and Patent Document 2 shown below are known.

  In Patent Document 1, a stopper that mechanically restricts a baffle (opening / closing body) that opens and closes to an opening to a desired opening position is provided, so that the opening position of the baffle due to a malfunction of the motor can be reduced. A configuration that prevents errors is disclosed.

  Further, Patent Document 2 discloses a configuration in which a contact portion formed so as to protrude toward the baffle is provided in the opening, and the contact portion hardly causes a gap between the baffle and the opening. .

Special table 2008-528923 Japanese Patent No. 3047160

  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, an increase in the internal volume is required, and it is desirable that the volume in the storage space is not reduced while the opening area is enlarged.

  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. Therefore, from the viewpoint of energy saving, it is desirable to increase the sealing degree when closing the damper device.

  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.

  Then, an object of this invention is to obtain the refrigerator which can close the opening of a damper apparatus reliably and improved energy-saving performance.

  In order to solve the above problems, a damper device according to the present invention includes a frame having a horizontally long opening, a plate-shaped opening / closing body that opens / closes the opening, and the opening / closing body around a drive shaft in a longitudinal direction of the opening / closing body. Driving means for driving the opening / closing body, a first protrusion provided from the center of the driving shaft of the opening / closing body and extending in a direction opposite to the driving shaft with respect to the opening / closing body, and the opening with respect to the driving shaft A second projection provided on the opposite side of the frame, and when the opening / closing body is closed, the first projection and the second projection are in contact with each other so that the opening / closing body is at the opening edge. It is characterized by touching.

  When the opening / closing body is driven from the closed state of the opening to the open state, the first protrusion gradually separates from the second protrusion as the opening / closing body is driven.

  A frame having a rectangular opening; drive means provided on a lateral side of the frame; one end connected to the drive means and the other end pivotally supported by the frame; A horizontally long plate-shaped opening / closing body that is rotationally driven so as to open and close the opening, a first protrusion that protrudes outward from the center of the rotation drive shaft of the opening / closing body, and is provided on the frame When the opening / closing body is driven in a direction to close the opening, the opening / closing body has a restricting portion that contacts the first protrusion and restricts the position of the opening / closing body in the direction to close the opening.

  A frame having a horizontally long opening; a plate-shaped opening / closing member that is pivotally supported in the longitudinal direction of the frame; and that opens and closes the opening; a driving unit that drives the opening / closing member around the shaft; And a position regulating means for regulating the position in the closing direction when the opening / closing body closes the opening.

  A frame having a horizontally long opening; a plate-like opening / closing body that opens and closes the opening; a driving unit that drives the opening / closing body around a driving shaft in a longitudinal direction of the opening / closing body; and the driving shaft of the opening / closing body A protrusion provided in a direction opposite to the drive shaft with respect to the opening / closing body, and a recess provided in the frame opposite to the opening with respect to the drive shaft. When the opening / closing body is closed, the protrusion is positioned in the recess so that the position of the opening / closing body is in contact with the opening.

  In addition, when the opening / closing body is driven from the closed state to the open state, the protrusion gradually moves away from the inside of the recess.

  The opening / closing body is integrally formed of resin.

  The refrigerator according to the present invention includes a frame having a horizontally long opening, a plate-shaped opening / closing body that opens and closes the opening, and a driving unit that drives the opening / closing body around a driving shaft in a longitudinal direction of the opening / closing body, A first protrusion provided at a center of the drive shaft of the opening / closing body and extending in a direction opposite to the drive shaft with respect to the opening / closing body; and the frame opposite to the opening with respect to the drive shaft. A second protrusion provided on the opening, and when the opening / closing body is closed, the first protrusion and the second protrusion are in contact with each other, and the position of the opening / closing body is in contact with the opening. A damper device is provided.

  A frame having a rectangular opening; drive means provided on a lateral side of the frame; one end connected to the drive means and the other end pivotally supported by the frame; A horizontally long plate-shaped opening / closing body that is rotationally driven so as to open and close the opening, a first protrusion that protrudes outward from the center of the rotation drive shaft of the opening / closing body, and is provided on the frame A damper device having a restricting portion that contacts the first protrusion and restricts the position of the opening and closing body in the direction of closing the opening when the opening and closing body is driven in the direction of closing the opening. Features.

  A frame having a horizontally long opening; a plate-shaped opening / closing member that is pivotally supported in the longitudinal direction of the frame; and that opens and closes the opening; a driving unit that drives the opening / closing member around the shaft; And a position restricting means for restricting the position in the closing direction when the opening / closing body closes the opening.

  A frame having a horizontally long opening; a plate-like opening / closing body that opens and closes the opening; a driving unit that drives the opening / closing body around a driving shaft in a longitudinal direction of the opening / closing body; and the driving shaft of the opening / closing body A protrusion provided in a direction opposite to the drive shaft with respect to the opening / closing body, and a recess provided in the frame opposite to the opening with respect to the drive shaft. And a damper device that regulates the position of the projection so that the projection is positioned in the recess and the opening / closing body contacts the opening when the opening / closing body is closed.

  The present invention can reliably close the opening of the damper device and can provide a refrigerator with improved energy saving performance.

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 deformation | transformation shape by the load torque of the opening / closing body of a damper. FIG. 13 is a cross-sectional view taken along the line U-U in FIG. FIG. 13 is a schematic view showing 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. 15, and shows the closed state of an opening-closing body. It is VV sectional drawing of FIG. 15, and the opening-closing body shows the intermediate state of a closed state and an open state. It is VV sectional drawing of FIG. 15, and shows the open state of an opening-closing body. FIG. 16 is a schematic diagram showing 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. 15. VV sectional drawing which shows another structure of the stopper which suppresses a deformation | transformation of the opening-closing body of the damper which concerns on another embodiment by this invention. The VV sectional view in which the opening-and-closing body of Drawing 20 shows the middle state of a closed state and an open state.

  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, the partition 54 forms the outlets 3c, 4c, 5c. This 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 cold air blown from the internal fan 9 to the outlets 3c, 4c, 5c, etc. between the blower cover 56 and the partition 54. is 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. Incidentally, in this embodiment, isobutane is used as a refrigerant, and the amount of refrigerant enclosed is as small as about 80 g.

  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. 9 shows a state in which the motor 70 is driven from the state of FIG. 8 and the pinion gear 72, the idler gear 73, and the output gear 75 are rotated in the directions of the arrows, respectively. The partial gear 75b and the idler gear that are part of the output gear 75 are shown. 73 is engaged with a partial gear 73b provided in a part of 73. 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 62 is increased, the opening 62 is elastically deformed by a reaction force when the opening 62 is closed, or the amount of deformation due to warping or deflection generated during molding increases, and the opening 62 is sealed. There is a problem that it becomes difficult. This problem will be described below in further detail with reference to FIGS.

  FIG. 12 is a perspective view showing the overall configuration of the damper as in FIG. 6. When the opening / closing body 64 is closed by applying a driving torque T to the drive shaft 61, the state in which the opening / closing body 64 is elastically deformed is displaced. It is the figure expanded and described intelligibly. A state in which the opening / closing body 64 is not displaced is indicated by a broken line. 13 is a cross-sectional view taken along the line U-U in FIG. 14 is a view taken in the direction of the arrow W in FIG. 12 and shows the pressure contact force 67 generated between the flexible cushioning member 64b 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.

  Accordingly, the shape of elastic deformation at each of the four corners of the opening / closing body 64 and the center of the side in the longitudinal direction 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.

  Next, the pressure contact force 67E at the E portion that is farthest from the drive shaft 61 from the center in the longitudinal direction of the opening / closing body 64 (on the side facing the rotation axis of the opening / closing body 64) is the pressure contact force between the D portion and the F portion. It takes a value between 67D and 67F. As described above, the pressing force 67D of the D portion increases as the driving torque T increases. On the other hand, the increase in the pressure contact force 67F of the F portion is small, and the pressure contact force decreases from the D portion to the F portion.

  Specifically, the deformation amount δde of the opening / closing body 64 generated between the D portion and the E portion on the driving means 60 side with respect to the central portion of the opening / closing body 64, and the E on the support shaft 65 side with respect to the central portion of the opening / closing body 64. Comparing the deformation amount δef of the opening / closing body 64 generated between the portion and the F portion, the deformation amount δde on the driving means 60 side is larger than the deformation amount δef on the support shaft 65 side. As a result, the pressure contact force 67E in the E portion is smaller than the average value of the pressure contact forces 67D and 67F in the D portion and the F portion, and as shown in FIG. 14, the pressure contact forces 67D, 67E, and 67F on the upper side in the drawing are connected. The distribution of the pressing force 67 is not a straight line, but tends to be a curve with a concave center.

  Next, the pressure contact force 67B of the B part which is the vicinity of the drive shaft 61 in the longitudinal center part of the opening / closing body 64 will be described. In FIG. 13, the drive torque T acts in the clockwise direction as shown. Then, the pressure contact force 67E at the E portion, which is the upper end of the opening / closing body 64, acts in the direction of the arrow 80E to press the buffer member 64b against the contact portion 66. On the other hand, in the portion B close to the drive shaft 61, the pressure contact force 67B when the drive torque T acts acts in the direction of 80B, which is the direction separating the buffer member 64b from the contact portion 66. That is, after the buffer member 64b comes into contact with the contact portion 66 at the E portion at the upper end in the figure, the buffer member 64b is deformed by being depressed by the pressure contact force 67E, but the amount of deformation is small. Therefore, the opening / closing body 64 is twisted and deformed so as to rotate in the direction of the arrow 80G around the E portion at the upper end, and in the B portion, the opening / closing body 64 is lifted from the contact portion 66 to generate a gap gap.

  If the opening / closing body 64 is long in the longitudinal direction, the rigidity is lowered and such deformation is more likely to occur. Therefore, when the driving torque T is increased, the opening / closing body 64 is increasingly lifted from the contact portion 66 of the opening 62 in the central portion B, and the opening 62 cannot be closed even if the driving torque T is increased. There is.

  That is, in the distribution of the pressing force shown in FIG. 14, the pressing force 67A, 67B, 67C in the vicinity of the drive shaft 61 shown in the lower side of the figure shows a tendency that the pressing force 67B at the center B portion is minimized. Here, as shown in FIG. 13, when the part B is lifted from the contact part, the pressure contact force 67B becomes zero.

  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.

  Also, as shown in FIG. 12 or FIG. 13, when the direction of warpage generated during resin molding of the opening / closing plate 64 a is the direction in which the B portion is lifted from the contact portion 66, a gap is generated due to the warpage and sealing cannot be performed. Here, there is a problem that even if the driving torque T is further increased, the opening / closing body 64 is deformed in the direction of increasing the gap gap and cannot be sealed.

  Next, the configuration of the freezer damper 50 according to the present invention will be described with reference to FIGS. FIG. 15 is a perspective view showing the overall configuration of the damper when the opening / closing body is closed as in FIG. 6. 16 is a VV cross-sectional view of FIG. FIG. 17 is a cross-sectional view taken along the line V-V during the opening and closing of the opening / closing body 64. FIG. 18 is a cross-sectional view taken along the line VV, showing the opening / closing body 64 when it is opened. FIG. 19 is a schematic diagram showing the distribution of the pressure contact force 67 generated between the buffer member 64b of the opening / closing body 64 and the contact portion 66 of the opening 62 as in FIG.

  The freezer compartment damper 50 of the present embodiment extends in the direction opposite to the opening / closing body 64 (outward of the opening / closing body 64) with respect to the drive shaft 61 at the center in the longitudinal direction of the opening / closing body 64, that is, in the portion B. A first protrusion 81 is provided. In other words, the opening / closing body 64 is located on the outer side of the opening / closing body 64 at a substantially central position between one side (drive shaft 61 side) and the other side (support shaft 65 side) on which the opening / closing body 64 is pivotally supported. A first protrusion 81 is provided.

  A second protrusion 82 is provided in the vicinity of the drive shaft 61 of the frame 63 and in the direction opposite to the opening 62 with respect to the drive shaft 61. In other words, the second protrusion 82 that contacts when the opening / closing body 64 closes the opening 62 is provided at a position corresponding to the first protrusion 81 of the frame 63.

  When the opening / closing body 64 closes the opening 62, the first protrusion 81 and the second protrusion 82 are in a positional relationship in contact with each other at the restricting portion 83.

  In FIG. 16, even if a driving torque T is applied to the driving shaft 61 and a force in the direction of the arrow 80B is applied to the opening / closing body 64, that is, a force that lifts from the contact portion 66 is applied to the opening / closing body 64. And the second protrusion 82 are in contact with each other at the restricting portion 83, and the opening / closing body 64 is not further deformed. That is, the positional relationship is determined such that the first protrusion 81 and the second protrusion 82 are in contact with each other at the restricting portion 83 in a state where the buffer member 64b is appropriately pressed against the contact portion 66. 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.

  Accordingly, as shown in FIG. 19, in the distribution of the pressure contact force 67 with the buffer member 64b around the contact portion 66 of the opening 62, the pressure contact force 67B of the B portion is larger than the pressure contact force 67B in FIG. Can be closed.

  Furthermore, when the opening / closing body 64 is rotated around the drive shaft 61 to rotate to the open state, the first protrusion 81 opens and closes with respect to the drive shaft 61 as shown in FIGS. The body 64 extends to the opposite side. Thereby, when opening the opening / closing body 64, the first protrusion 81 moves in a direction away from the second protrusion 82, which is preferable without hindering the opening operation of the opening / closing body 64.

  Further, in FIG. 16, if the driving torque T applied to the driving shaft 61 is further increased, after the buffer member 64 b of the opening / closing body 64 contacts the contact portion 66, the first protrusion 81 and the second protrusion 82 are further Is in contact with the restricting portion 83. As a result, the opening / closing body 64 cannot move any further in the B portion, which is the lower end in the drawing, and the elastic deformation of the opening / closing body 64 caused by the driving torque T further presses the E portion, which is the upper end in the drawing, around the regulating portion 83. Acts like That is, by increasing the drive torque T, the E portion, which is the substantially central portion in the longitudinal direction of the opening / closing body 64, can be pressed further strongly. As a result, when the opening / closing body 64 is closed, the first protrusion 81 and the second protrusion 82 as the restricting portion are in contact with each other, and the position is controlled so that the opening / closing body 64 is in contact with the edge of the opening 62. Therefore, when the opening / closing body 64 closes the opening 62, the freezing chamber damper 50 can be provided with more reliable and reliable closing of the opening / closing body 64 by having the position restricting means for restricting the position in the closing direction.

  Furthermore, when the opening / closing plate 64a of the opening / closing body 64 has a warp at the time of resin molding, and the direction of the warp is the direction in which the B portion is lifted from the contact portion 66 as shown in FIG. When the opening / closing body 64 is closed, the first protrusion 81 and the second protrusion 82 come into contact with each other at the restriction portion 83, so that the buffer member 64 b of the opening / closing body 64 moves in the direction of the opening 62 and contacts the contact portion 66. . Accordingly, the opening is reliably sealed regardless of whether the opening / closing body 64 is warped or not, so that it is possible to provide a more reliable and reliable damper.

  Next, another embodiment will be described with reference to FIGS. 20 and 21 are cross-sectional views of the freezer compartment damper 50. FIG. The configuration of FIG. 20 is different from the configuration shown in FIG. 16 in that a recess 84 is provided in the frame 63 instead of the second protrusion 82 provided in the frame 63. When the opening / closing body 64 is closed, the tip of the first projection 81 enters the inside of the recess 84, and the first projection 81 and one side of the recess 84 abut at the restriction portion 83. As a result, the opening / closing body 64 can be prevented from moving in a direction away from the opening 62, so that the freezer damper 50 can be reliably closed and reliable as described above.

  Further, as shown in FIG. 21 in the middle of opening / closing of the opening / closing body 64, the first protrusion 81 is not in contact with the recess 84 during the series of opening / closing operations. The dimension or positional relationship between one protrusion 81 and the recess 84 is determined. This is preferable because it does not hinder the opening operation of the opening and closing body 64.

  As described above, the stopper that suppresses the displacement of the opening / closing body in the direction of rising from the opening of the frame when the opening / closing body is closed is opened / closed at the approximate center in the longitudinal direction of the opening / closing body that is pivotably supported. It was provided between the body and the frame. Thereby, the clearance gap produced between the flame | frame and opening / closing body at the time of closing the opening / closing body by the elastic deformation of the opening / closing body, and the curvature and twist which generate | occur | produce at the time of resin molding can be suppressed. Moreover, the opening of a damper can be closed reliably, the leak between the cold air supplied to a freezer compartment, and the cold air supplied to a refrigerator compartment or a vegetable compartment can be prevented, and the refrigerator which can aim at energy saving can be provided. Accordingly, it is possible to obtain a refrigerator capable of ensuring energy saving performance while maintaining the food storage temperature while maintaining the food in the refrigerator within a predetermined temperature range.

1 Refrigerator 2 Refrigerated room (refrigerated temperature zone)
3 Ice making room (freezing temperature zone)
4 Upper freezer room (freezing temperature room)
5 Lower freezer compartment (freezing temperature zone)
6 Vegetable room (refrigerated temperature room)
20 refrigerator compartment damper 50 freezer compartment damper 60 drive means 61 drive shaft 62 opening 62a connecting means 63 frame 64 opening / closing body 64a opening / closing plate 64b buffer member 65 support shaft 66 contact portion 67 pressure contact force 70 motor 71 output shaft 72 pinion gear 73 idler gear 74 idler Support point 75 Output gear 81 First protrusion 82 Second protrusion 83 Restriction part 84 Concave part

Claims (11)

A frame having a horizontally long opening;
A plate-like opening and closing body for opening and closing the opening;
Drive means for driving the opening / closing body around a drive axis in the longitudinal direction of the opening / closing body;
A first protrusion provided from the center of the drive shaft of the opening and closing body and extending in a direction opposite to the drive shaft with respect to the opening and closing body;
A second protrusion provided on the frame opposite to the opening with respect to the drive shaft,
The damper device according to claim 1, wherein when the opening / closing body is closed, the first protrusion and the second protrusion are in contact with each other so that the opening / closing body is in contact with the opening edge.   2. The damper device according to claim 1, wherein when the opening / closing body is driven from the closed state of the opening to the opened state, the first protrusion gradually separates from the second protrusion as the opening / closing body is driven. . A frame having a rectangular opening;
Drive means provided on the side of the short part of the frame;
A horizontally long plate-shaped opening / closing body that has one end connected to the driving means and the other end pivotally supported by the frame, and is rotationally driven so as to open and close the opening by the driving means;
A first protrusion provided outward from the center of the rotary drive shaft of the opening / closing body;
A restricting portion provided on the frame and configured to contact the first protrusion and restrict the position of the opening / closing body in the direction of closing the opening when the opening / closing body is driven in the direction of closing the opening; A damper device. A frame having a horizontally long opening;
A plate-like opening and closing body that is pivotally supported in the longitudinal direction of the frame and opens and closes the opening;
Drive means for driving the opening / closing body around the shaft support;
A damper device comprising: a position restricting means provided at a center of the longitudinal direction of the opening and closing body, the position restricting means for restricting the position in the closing direction when the opening and closing body closes the opening. . A frame having a horizontally long opening;
A plate-like opening and closing body for opening and closing the opening;
Drive means for driving the opening / closing body around a drive axis in the longitudinal direction of the opening / closing body;
A protrusion provided from the center of the drive shaft of the opening and closing body and extending in a direction opposite to the drive shaft with respect to the opening and closing body;
A recess provided in the frame opposite to the opening with respect to the drive shaft,
A damper device characterized in that when the opening / closing body is closed, the protrusion is positioned in the recess and the position of the opening / closing body is in contact with the opening.   6. The damper device according to claim 5, wherein when the opening / closing body is driven from a closed state to an open state, the protrusion gradually moves away from the recess.   7. The damper device according to claim 1, wherein the opening / closing body is integrally formed of resin. A frame having a horizontally long opening;
A plate-like opening and closing body for opening and closing the opening;
Drive means for driving the opening / closing body around a drive axis in the longitudinal direction of the opening / closing body;
A first protrusion provided from the center of the drive shaft of the opening and closing body and extending in a direction opposite to the drive shaft with respect to the opening and closing body;
A second protrusion provided on the frame opposite to the opening with respect to the drive shaft,
A refrigerator comprising: a damper device that regulates a position so that the first protrusion and the second protrusion are in contact with each other and the opening / closing body is in contact with the opening when the opening / closing body is closed. A frame having a rectangular opening;
Drive means provided on the side of the short part of the frame;
A horizontally long plate-shaped opening / closing body that has one end connected to the driving means and the other end pivotally supported by the frame, and is rotationally driven so as to open and close the opening by the driving means;
A first protrusion provided outward from the center of the rotary drive shaft of the opening / closing body;
A damper provided on the frame, wherein the opening and closing body is driven in a direction to close the opening, and a regulating portion that contacts the first protrusion and restricts the position of the opening and closing body in the direction to close the opening. A refrigerator comprising the apparatus. A frame having a horizontally long opening;
A plate-like opening and closing body that is pivotally supported in the longitudinal direction of the frame and opens and closes the opening;
Drive means for driving the opening / closing body around the shaft support;
A refrigerator provided with a damper device provided with a position restricting means that is provided from the center of the longitudinal direction of the opening / closing body, and that restricts the position in the closing direction when the opening / closing body closes the opening. A frame having a horizontally long opening;
A plate-like opening and closing body for opening and closing the opening;
Drive means for driving the opening / closing body around a drive axis in the longitudinal direction of the opening / closing body;
A protrusion provided from the center of the drive shaft of the opening and closing body and extending in a direction opposite to the drive shaft with respect to the opening and closing body;
A recess provided in the frame opposite to the opening with respect to the drive shaft,
A refrigerator provided with a damper device that restricts the position of the projection so that the projection is positioned in the recess and the opening / closing body contacts the opening when the opening / closing body is closed.

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