JP7011299B2 - Cloaking device and refrigerator with it - Google Patents

Description

The present invention relates to a shielding device that appropriately blocks the air passage leading to the storage chamber and a refrigerator provided with the shielding device.

Conventionally, a refrigerator as described in Patent Document 1 has been known in which a plurality of storage chambers are appropriately cooled by one cooler. FIG. 10 schematically shows the refrigerator 100 described in this document. In the refrigerator 100 shown in this figure, a refrigerating chamber 101, a freezing chamber 102, and a vegetable compartment 103 are formed from above. A cooling chamber 104 in which the cooler 108 is housed is formed on the back side of the freezing chamber 102, and cold air is supplied to each storage chamber on the partition wall 105 that separates the cooling chamber 104 and the freezing chamber 102. The opening 106 for the purpose is formed. Further, a blower 107 for blowing cold air is disposed in the opening 106, and a cover 110 for covering the blower 107 is arranged on the freezing chamber 102 side. A damper 114 is arranged in the middle of the air passage 109 through which the cold air supplied to the refrigerating chamber 101 flows.

The cover 110 described above will be described in detail with reference to FIG. The cover 110 is formed with a recess 111 having a substantially quadrangular shape, and an opening 113 is formed by partially cutting out the upper portion of the recess 111. Here, in the situation where the cover 110 covers the blower 107 described above, the opening 113 of the cover 110 communicates with the air passage 109 on the refrigerator main body side.

The refrigerator 100 having the above configuration operates as follows. First, when cooling both the refrigerating chamber 101 and the freezing chamber 102, the cover 110 is separated from the blower 107, the damper 114 is opened, and the blower 107 is rotated in this state. Then, a part of the cold air cooled by the cooler 108 inside the cooling chamber 104 is blown to the freezing chamber 102 by the wind blown by the blower 107. Further, the other part of the cold air is blown to the refrigerating chamber 101 via the air passage 109, the damper 114, and the air passage 109. As a result, both the freezing chamber 102 and the refrigerating chamber 101 are cooled.

On the other hand, when cooling only the refrigerating chamber 101, the blower 107 is covered with the cover 110, the damper 114 is opened, and the cold air cooled by the cooler 108 is blown by the blower 107 in this state. When the cover 110 is closed, the opening 113 formed in the upper part of the cover 110 communicates with the air passage 109. Therefore, the cold air blown by the blower 107 is supplied to the refrigerating chamber 101 via the above-mentioned opening 113, the damper 114, and the air passage 109.

Japanese Unexamined Patent Publication No. 2013-2664

In the refrigerator 100 described above, even when the cover 110 is closed, cold air can be blown toward the refrigerating chamber 101 via the opening 113 formed by partially cutting out the cover 110. However, since the opening area of the opening 113 cannot be changed, there is a problem that it is difficult to adjust the air volume of the cold air blown to the refrigerating chamber 101 via the opening 113.

Further, it is possible to adjust the air volume of the cold air sent to the refrigerating chamber 101 by adjusting the opening / closing degree of the damper 114. However, there is a problem that the adoption of the damper 114 complicates the configuration of the entire refrigerator and increases the cost.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a shielding device capable of easily switching air passages and adjusting air volume, and a refrigerator provided with the shielding device. ..

The present invention is a shielding device that blocks the air passage of a refrigerator, and comprises a blower, a first main surface portion, a first side surface portion erected from a peripheral portion of the first main surface portion, and the first side surface portion. A blower cover that has a first opening formed by the opening of the blower and moves along the rotation axis direction of the blower, and a second main surface portion that is rotatably arranged inside the blower cover. And a second side surface portion erected from the peripheral portion of the second main surface portion, and a second opening portion formed by partially opening the second side surface portion, and the blower cover. The internal rotary cover that moves along the rotation axis direction of the blower is provided , and the circumferential positions of the first opening of the blower cover and the second opening of the internal rotary cover are different. As a result, the air passage is closed, and the first opening of the blower cover and the second opening of the internal rotation cover are overlapped to form a superposed opening, and the superposed opening is formed. It is characterized by being in an open state where air can be blown from the part .

Further, in the shielding device of the present invention, a drive shaft that moves the blower cover together with the internal rotation cover along the rotation axis of the blower, a drive bar that rotates the internal rotation cover by the driving force of a motor, and a drive bar. Further, the drive shaft and the drive bar are driven by the same drive unit .

Further, in the shielding device of the present invention, a contact portion is formed in which the drive shaft partially protrudes, and the drive bar presses the contact portion along the circumferential direction to drive the drive. It is characterized by the rotation of the shaft.

Further, in the shielding device of the present invention, the drive shaft has a tubular portion, a flange-shaped portion formed from one end side of the tubular portion toward the outside in the radial direction, and a part of the flange-shaped portion of the blower. It has a drive shaft engaging portion that protrudes toward the cover side, and the blower cover is characterized by having an inner protruding portion that projects the first main surface portion in the thickness direction.

Further, in the shielding device of the present invention, the drive shaft engaging portion is formed elongated along the circumferential direction, and one end side of the free end of the drive shaft engaging portion is projected toward the blower cover side. As a result, a drive shaft protrusion is formed, and the drive shaft protrusion engages with the inner protrusion of the blower cover.

Further, the shielding device of the present invention further includes a shielding wall which is arranged at a position facing the blower cover across the blower and has an opening through which the cold air blown by the blower flows. When the blower cover and the internal rotating cover are separated from the shielding wall, the air passage is fully opened, and the blower cover and the internal rotating cover come into contact with the shielding wall to form the first opening. By making the circumferential position of the portion and the second opening different, the air passage is completely closed, and the inside of the blower cover and the internal rotating cover remain in contact with the shielding wall. By rotating the rotating cover, the first opening and the second opening overlap each other to form a superposed opening, and the cover is in a half-open state in which air can be blown from the superposed opening. ..

In the refrigerator of the present invention, a cooling cycle cooler for cooling the air supplied to the storage chamber via the air passage and a cooling port in which the cooler is arranged and connected to the storage chamber are formed. It is characterized by comprising a chamber and a shielding device that at least partially closes the air outlet.

The present invention is a shielding device that blocks the air passage of a refrigerator, and comprises a blower, a first main surface portion, a first side surface portion erected from a peripheral portion of the first main surface portion, and the first side surface portion. A blower cover that has a first opening formed by the opening of the blower and moves along the rotation axis direction of the blower, and a second main surface portion that is rotatably arranged inside the blower cover. And a second side surface portion erected from the peripheral portion of the second main surface portion, and a second opening portion formed by partially opening the second side surface portion, and the blower cover. The internal rotary cover that moves along the rotation axis direction of the blower is provided , and the circumferential positions of the first opening of the blower cover and the second opening of the internal rotary cover are different. As a result, the air passage is closed, and the first opening of the blower cover and the second opening of the internal rotation cover are overlapped to form a superposed opening, and the superposed opening is formed. It is characterized by being in an open state where air can be blown from the part . Therefore, by moving the blower cover and the internal rotation cover along the rotation axis of the blower, the air passage can be opened and closed by the blower cover and the internal rotation cover. In addition, since the internal rotation cover is arranged inside the blower cover, the internal rotation cover is rotated so that the first opening of the blower cover and the second opening of the internal rotation cover are overlapped with each other. It is possible to form a superposed opening on which the openings are superposed. Air can be blown from this superposed opening toward a specific storage chamber. Therefore, the air passage can be opened and closed by the blower cover and the internal rotating cover, and the air can be selectively blown from the overlapping opening toward each storage chamber.

Further, in the shielding device of the present invention, a drive shaft that moves the blower cover together with the internal rotation cover along the rotation axis of the blower, a drive bar that rotates the internal rotation cover by the driving force of a motor, and a drive bar. Further, the drive shaft and the drive bar are driven by the same drive unit . Therefore, by rotating the drive shaft, the blower cover can be separated and brought closer to the blower. Further, the internal rotation cover can be rotated by rotating the drive bar, and the above-mentioned first opening and the second opening can be overlapped with each other.

Further, in the shielding device of the present invention, a contact portion is formed in which the drive shaft partially protrudes, and the drive bar presses the contact portion along the circumferential direction to drive the drive. It is characterized by the rotation of the shaft. Therefore, by rotating the drive shaft by pressing the contact portion with the drive bar, the drive shaft can be rotated at a predetermined timing, and the blower cover and the internal rotation cover can be moved along the axial direction of the blower. ..

Further, in the shielding device of the present invention, the drive shaft has a tubular portion, a flange-shaped portion formed from one end side of the tubular portion toward the outside in the radial direction, and a part of the flange-shaped portion of the blower. It has a drive shaft engaging portion that protrudes toward the cover side, and the blower cover is characterized by having an inner protruding portion that projects the first main surface portion in the thickness direction. Therefore, the drive shaft can be fixed in the rotational direction by engaging the drive shaft engaging portion of the drive shaft with the inner protruding portion of the blower cover. Therefore, by rotating the internal rotating cover in this state, the first opening of the blower cover and the second opening of the internal rotating cover can be overlapped to form the overlapping opening. Further, at that time, by not rotating the drive shaft, it is possible to form the overlapping opening while keeping the blower cover and the internal rotation cover in the closed state.

Further, in the shielding device of the present invention, the drive shaft engaging portion is formed elongated along the circumferential direction, and one end side of the free end of the drive shaft engaging portion is projected toward the blower cover side. As a result, a drive shaft protrusion is formed, and the drive shaft protrusion engages with the inner protrusion of the blower cover. Therefore, by forming the drive shaft engaging portion elongated along the circumferential direction, the drive shaft engaging portion is easily deformed. Therefore, the drive shaft protruding portion can be engaged with the inner protruding portion by the urging force generated when the drive shaft engaging portion is elastically deformed, and the drive shaft can be reliably fixed in the rotational direction.

Further, the shielding device of the present invention further includes a shielding wall which is arranged at a position facing the blower cover across the blower and has an opening through which the cold air blown by the blower flows. When the blower cover and the internal rotating cover are separated from the shielding wall, the air passage is fully opened, and the blower cover and the internal rotating cover come into contact with the shielding wall to form the first opening. By making the circumferential position of the portion and the second opening different, the air passage is completely closed, and the inside of the blower cover and the internal rotating cover remain in contact with the shielding wall. By rotating the rotating cover, the first opening and the second opening overlap each other to form a superposed opening, and the cover is in a half-open state in which air can be blown from the superposed opening. .. Therefore, the fully open state and the fully closed state can be realized by separating or approaching the blower cover and the internal rotating cover with respect to the shielding wall. Further, a superposed opening is formed by superimposing the first opening and the second opening, and air can be blown from the superposed opening. Therefore, in the semi-shielded state, an opening having an arbitrary area can be formed on the side surface of the blower cover, and the amount of cold air blown to the storage chamber can be adjusted.

In the refrigerator of the present invention, a cooling cycle cooler for cooling the air supplied to the storage chamber via the air passage and a cooling port in which the cooler is arranged and connected to the storage chamber are formed. It is characterized by comprising a chamber and a shielding device that at least partially closes the air outlet. Therefore, the shielding device not only shields the air passage, but also enables switching of the air passage and adjustment of the air volume. Therefore, the refrigerator can be configured by omitting the conventional damper.

It is a front view which shows the appearance of the refrigerator which concerns on embodiment of this invention. It is a side sectional view which shows the internal structure of the refrigerator which concerns on embodiment of this invention. It is an enlarged side sectional view which shows the structure near the cooling chamber of the refrigerator which concerns on embodiment of this invention. It is a figure which shows the shielding device which concerns on embodiment of this invention, (A) is a perspective view, (B) is an exploded perspective view. It is a figure which shows the shielding device which concerns on embodiment of this invention, (A) and (B) are the exploded perspective views. It is a figure which shows the shielding device which concerns on embodiment of this invention, (A) is the perspective view which shows the drive shaft, (B) is the perspective view which shows a blower cover. It is a figure which shows the shielding device which concerns on embodiment of this invention, (A) is a perspective view which shows the shielding device in a fully open state, (B) is a plan view of the shielding device in that state, (C) is It is sectional drawing of the shielding device in that state. It is a figure which shows the shielding device which concerns on embodiment of this invention, (A) is a perspective view which shows the shielding device in a fully closed state, (B) is a plan view of the shielding device in that state, (C). Is a cross-sectional view of the shielding device in that state. It is a figure which shows the shielding device which concerns on embodiment of this invention, (A) is the perspective view which shows the shielding device in a half-open state, (B) is a plan view of the shielding device in that state, (C) is It is sectional drawing of the shielding device in that state. It is an enlarged side view which shows the refrigerator which concerns on the background technology. It is a perspective view which shows the blower cover adopted in the refrigerator which concerns on the background technology.

Hereinafter, the refrigerator 10 according to the embodiment of the present invention will be described in detail with reference to the drawings. In the following description, the same members are designated by the same reference numerals in principle, and repeated description thereof will be omitted. Further, in the following description, each direction of up, down, front, back, left and right is appropriately used, and the left and right refer to the left and right when the refrigerator 10 is viewed from the front. Further, in the following description, the position in the circumferential direction may be referred to as a circumferential position, and the position in the radial direction may be referred to as a radial position.

FIG. 1 is a front external view showing a schematic structure of the refrigerator 10 of the present embodiment. As shown in FIG. 1, the refrigerator 10 includes a heat insulating box 11 as a main body, and a storage chamber for storing food and the like is formed inside the heat insulating box 11. The uppermost storage room is the refrigerating room 15, the lower left side is the ice making room 16, the right side is the upper freezing room 18, the lower part is the lower freezing room 19, and the lowermost part is the vegetable room 20. The ice making chamber 16, the upper freezing chamber 18, and the lower freezing chamber 19 are all storage chambers in the freezing temperature range, and these may be collectively referred to as the freezing chamber 17 in the following description.

The front surface of the heat insulating box 11 is open, and the heat insulating door 21 and the like are provided in the openings corresponding to the respective storage chambers so as to be openable and closable. The heat insulating door 21 divides the front surface of the refrigerating chamber 15 in the left-right direction and closes the heat insulating door 21, and the outer upper and lower end portions of the heat insulating door 21 in the width direction are rotatably attached to the heat insulating box body 11. Further, the heat insulating doors 22, 23, 24, and 25 are integrally combined with the storage container, and are supported by the heat insulating box 11 so as to be freely pulled out in front of the refrigerator 10.

FIG. 2 is a side sectional view showing a schematic structure of the refrigerator 10. As shown in FIG. 2, the heat insulating box 11 which is the main body of the refrigerator 10 is arranged with a steel plate outer box 12 having an open front surface and a gap in the outer box 12, and the front surface is opened. It is composed of an inner box 13 made of synthetic resin. A heat insulating material 14 made of foamed polyurethane is filled and foamed in the gap between the outer box 12 and the inner box 13. The heat insulating doors 21 to 25 described above also adopt the same heat insulating structure as the heat insulating box 11.

The refrigerating chamber 15 and the freezing chamber 17 located below the refrigerating chamber 15 are partitioned by a heat insulating partition wall 42. The ice making chamber 16 inside the freezing chamber 17 and the upper freezing chamber 18 are partitioned by a partition wall (not shown here). Further, cold air, which is cooled air, is freely communicated between the ice making chamber 16 and the upper freezing chamber 18 and the lower freezing chamber 19 provided below the ice making chamber 16. The freezing chamber 17 and the vegetable compartment 20 are separated by a heat insulating partition wall 43.

On the back surface of the refrigerating chamber 15, a partition body 65 made of synthetic resin is partitioned, and a refrigerating chamber supply air passage 29 as a supply air passage for supplying cold air to the refrigerating chamber 15 is formed. The air outlet 33 for flowing cold air to the refrigerating chamber 15 is formed in the refrigerating chamber supply air passage 29.

A freezing chamber supply air passage 31 is formed on the back side of the freezing chamber 17 to allow the cold air cooled by the cooler 45 to flow to the freezing chamber 17. A cooling chamber 26 is formed further behind the freezing chamber supply air passage 31, and a cooler 45, which is an evaporator for cooling the air circulating in the refrigerator, is arranged inside the cooling chamber 26. ..

The cooler 45 is connected to a compressor 44, a radiator (not shown), and a capillary tube which is an expansion means (not shown) via a refrigerant pipe, and constitutes a steam compression type refrigeration cycle circuit.

FIG. 3 is a side sectional view showing a structure in the vicinity of the cooling chamber 26 of the refrigerator 10. The cooling chamber 26 is provided inside the heat insulating box 11 on the back side of the freezing chamber supply air passage 31. The cooling chamber 26 and the freezing chamber 17 are partitioned by a partition body 66 made of synthetic resin.

The freezing chamber supply air passage 31 formed in front of the cooling chamber 26 is a space formed between the cooling chamber 26 and the synthetic resin front cover 67 assembled in front of the cooling chamber 26, and is cooled by the cooler 45. It becomes an air passage through which cold air flows. The front cover 67 is formed with an outlet 34, which is an opening for blowing cold air into the freezing chamber 17.

A return port 38 for returning air from the freezing chamber 17 to the cooling chamber 26 is formed on the lower back surface of the lower freezing chamber 19. Below the cooling chamber 26, a return port 28 is formed which is connected to the return port 38 and sucks the return cold air from each storage chamber into the inside of the cooling chamber 26. Cold air returning via the return port 39 of the vegetable compartment 20 and the vegetable compartment return air passage 37 shown in FIG. 2 also flows into the return port 28.

Further, below the cooler 45, a defrost heater 46 is provided as a defrosting means for melting and removing the frost adhering to the cooler 45. The defrost heater 46 is an electric resistance heating type heater.

An air outlet 27, which is an opening connected to each storage chamber, is formed in the upper part of the cooling chamber 26. The air outlet 27 is an opening through which the cold air cooled by the cooler 45 flows, and communicates the cooling chamber 26 with the refrigerating chamber supply air passage 29 and the freezing chamber supply air passage 31. The blower port 27 is provided with a blower 47 that blows cold air toward the freezing chamber 17 and the like.

A shielding device 70 for closing the air outlet 27 is provided on the outside of the air outlet 27 of the cooling chamber 26. The shielding device 70 is attached to the front cover 67. The detailed configuration and operation of the shielding device 70 will be described later.

With reference to FIG. 4, the configuration of the shielding device 70 that appropriately shields each of the above-mentioned air passages will be described. FIG. 4A is a perspective view showing the shielding device 70, and FIG. 4B is an exploded perspective view showing each member constituting the shielding device 70 separated in the front-rear direction. Here, each member constituting the shielding device 70 is made of injection-molded synthetic resin.

With reference to FIGS. 4 (A) and 4 (B), the shielding device 70 includes a shielding base 71, a blower cover 72, an internal rotation cover 73, a drive shaft 74, a drive bar 75, and a shielding lid 76 from the front side. have. A blower 47 is arranged between the internal rotating cover 73 and the shielding lid 76.

The shielding base 71 is made of a circularly molded synthetic resin plate or the like, and mechanically supports other members of the shielding device 70. A cylindrical support portion 78 projecting rearward is attached to the peripheral portion of the shielding base 71. Here, the three support portions 78 are arranged at equal intervals along the circumferential direction. The rear end of the support portion 78 is fixed to the front main surface of the shielding lid 76 described above via a fastening means such as a screw.

The blower cover 72 is a lid-like member that closes the blower 47 and the blower port 27 from the front. The blower cover 72 has an internal space that can accommodate the blower 47. Further, the blower cover 72 moves in the front-rear direction, which is the rotation axis direction of the blower 47, as the drive shaft 74 rotates. The blower cover 72 moves rearward, and the rear peripheral edge of the blower cover 72 abuts on the front surface of the shielding lid 76, whereby the air passage formed between the blower cover 72 and the shielding lid 76 is shielded. ..

On the other hand, the blower cover 72 moves forward, and the rear peripheral edge of the blower cover 72 is separated from the front surface of the shielding lid 76, so that cold air is blown from the gap between the blower cover 72 and the shielding lid 76. .. Further, as will be described later, an opening is formed in the side surface portion of the blower cover 72 to enable blowing in the closed state. Further, a through hole 86 is formed by opening the central portion of the blower cover 72.

The internal rotation cover 73 is a cover built in the blower cover 72 described above, and has the same shape as the blower cover 72. The internal rotation cover 73 appropriately rotates inside the blower cover 72 and moves in the front-rear direction together with the blower cover 72. As will be described later, the side surface portion of the internal rotating cover 73 is formed with an opening for allowing air to be blown in the closed state. Further, a through hole 87 is formed by opening the central portion of the internal rotation cover 73.

The drive shaft 74 has a substantially cylindrical shape, and is provided with a screw thread 58, which will be described later, in which a part of a side surface thereof is continuously projected in a spiral shape. The drive shaft 74 is a drive mechanism that moves the blower cover 72 and the internal rotation cover 73 in the front-rear direction. The screw thread 58 formed on the side surface of the drive shaft 74 and the screw groove 59 described later formed on the side surface of the through hole 86 of the blower cover 72 are screwed together under usage conditions. That is, a screw mechanism is formed by the screw thread 58 of the drive shaft 74 and the screw groove 59 of the through hole 86 of the blower cover 72.

When the drive shaft 74 rotates clockwise, for example, when viewed from the rear, the blower cover 72 and the internal rotation cover 73 are separated from the shielding base 71, and the blower cover 72 closes the blower port 27 shown in FIG. 2 to close the drive shaft 74. Therefore, the cold air blown by the blower 47 is not supplied to the freezing chamber 17. On the other hand, when the drive shaft 74 rotates counterclockwise when viewed from the front, for example, the blower cover 72 and the internal rotation cover 73 move toward the shielding base 71 side, and the blower port 27 shown in FIG. 3 is the blower cover 72. It will not be covered and will be in a non-closed state. Therefore, the cold air blown by the blower 47 is supplied to the freezing chamber 17 via this gap.

The drive bar 75 is incorporated in the drive shaft 74 from the rear side and has a function of rotating the internal rotation cover 73 in the internal space of the blower cover 72. The drive bar 75 is rotated by a driving force of a motor (not shown here). The radial outer end of the drive bar 75 is in contact with the inner wall of the internal rotating cover 73.

The blower 47 has, for example, a fan (not shown) which is a centrifugal fan and a motor (not shown here) for rotating the fan. The peripheral portion of the blower 47 is attached to the shielding lid 76 from the front via the columnar support portion 77. The peripheral portion of the blower 47 is fastened to the support portion 77 by a fastening means such as a screw.

The shielding lid 76 is made of a synthetic resin plate or the like molded in a circular shape, and has an opening 88 formed in the central portion for circulating the cold air blown by the blower 47. The opening 88 is arranged in the immediate vicinity of the air outlet 27 of the cooling chamber 26 shown in FIG.

Here, the drive bar 75 is drivenly connected to a motor (not shown), while the blower cover 72, the internal rotation cover 73, and the drive shaft 74 are not directly connected to the motor. The internal rotation cover 73 and the drive shaft 74 are rotated by a motor via the drive bar 75. Specifically, the internal rotation cover 73 is pushed in the circumferential direction by the internal rotation cover 73 and rotates by engaging the radial outer end portion of the drive bar 75. As will be described later, the drive shaft 74 rotates when the boss 54 of the drive shaft 74 is pushed along the circumferential direction by the drive bar 75. The blower cover 72 moves along the front-rear direction due to the action of the screw mechanism described above by rotating the drive shaft 74.

The above-mentioned shielding device 70 will be described in more detail with reference to FIG. 5 (A) and 5 (B) are enlarged perspective views showing each member constituting the shielding device 70.

With reference to FIG. 5A, the blower cover 72 has a circular first main surface portion 80 and a first side surface portion 81 erected rearward from the peripheral edge portion of the main surface portion.

A tubular insertion hole 82 is formed in the outer portion of the first side surface portion 81. Here, a plurality of insertion holes 82 are formed at equal intervals along the circumferential direction. The support portion 78 of the shielding base 71 is inserted into the insertion hole 82. When the blower cover 72 is opened and closed in the front-rear direction, the support portion 78 slides inside the insertion hole 82. As a result, the opening / closing operation of the blower cover 72 is guided by the support portion 78. As described above, the rotation of the drive shaft 74 causes the blower cover 72 to open and close.

The first opening 79 is formed by opening the first side surface portion 81 of the blower cover 72. The first opening 79 is an opening for blowing air toward the storage chamber even when the blower cover 72 shields the blower 47 described above.

The internal rotation cover 73 has a substantially circular second main surface portion 83 and a second side surface portion 84 erected from the outer peripheral edge of the second main surface portion 83 toward the rear. The second opening 85 is formed by partially cutting out the second side surface portion 84. Further, an engaged portion 90, which will be described later, is formed on the inner wall of the second side surface portion 84, and the engaged portion 90 engages with the drive bar 75 described above.

With reference to FIG. 5B, the drive bar 75 has a substantially disk-shaped base 64 and an engaging portion 89 that is continuous from the base 64 and extends radially outward in a rod shape. The base 64 is drivenly connected to the motor. The engaging portion 89 has a tip portion 62 on the outer side in the radial direction and an intermediate portion 63 extending inward in the radial direction from the tip portion 62. A step is formed between the tip portion 62 and the intermediate portion 63, and the tip portion 62 is arranged in front of the intermediate portion 63. The upper surface of the intermediate portion 63 abuts on the rear surface of the flange-shaped portion 55, which will be described later, of the drive shaft 74.

The engaged portion 90 is formed by partially projecting the inner side surface of the second side surface portion 84 of the internal rotation cover 73 inward in the radial direction in a rib shape. The tip portion 62 of the engaging portion 89 of the drive bar 75 engages with the engaged portion 90 of the internal rotation cover 73. Specifically, the outer tip portion of the tip portion 62 of the engaging portion 89 is sandwiched between the rib-shaped engaged portions 90 from both sides in the circumferential direction. According to this shape, the internal rotation cover 73 can be rotated by rotating the drive bar 75.

The drive shaft 74 is a member formed in a substantially cylindrical shape along the front-rear direction, and a drive shaft engaging portion 53 and a boss 54 are formed on the rear main surface thereof. As will be described later, the drive shaft engaging portion 53 is a portion for restricting the movement of the blower cover 72 by restricting the rotation of the drive shaft 74, and the boss 54 is the drive shaft by the drive force of the drive bar 75. It is a part for rotating 74. The boss 54 is a contact portion in which the flange-shaped portion 55 of the drive shaft 74 is partially projected rearward in a columnar shape.

As will be described later, when the shielding device 70 is in a fully closed state in which the air passage is almost completely shielded, the drive shaft engaging portion 53 of the drive shaft 74 and the inner protruding portion 61 of the blower cover 72, which will be described later, are engaged with each other. .. As a result, the rotation of the drive shaft 74 is temporarily suppressed, and the internal rotation cover 73 can be rotated while the blower cover 72 is in the shielded state to form a semi-shielded state. Such matters will be described later with reference to FIG.

The structures of the drive shaft 74 and the blower cover 72 described above will be described in detail with reference to FIG. FIG. 6A is a perspective view showing the drive shaft 74, and FIG. 6B is a perspective view showing the blower cover 72.

With reference to FIG. 6A, the drive shaft 74 has a substantially cylindrical tubular portion 57 and a flange-shaped portion 55 extending radially outward from the rear end of the tubular portion 57. And have. The screw thread 58 is formed by spirally projecting the outer side surface of the tubular portion 57. The screw thread 58 is screwed into the screw groove 59 of the blower cover 72, which will be described later.

By surrounding a part of the flange-shaped portion 55 with a slit, a drive shaft engaging portion 53 extending elongated along the circumferential direction is formed. The right end of the drive shaft engaging portion 53 on the paper surface is continuous with the other portion of the flange-shaped portion 55. On the other hand, the upper side, the lower side, and the left end of the drive shaft engaging portion 53 on the paper surface are discontinuous with the other portions of the flange-shaped portion 55. That is, the left end of the drive shaft engaging portion 53 on the paper surface is a free end that can be displaced in the thickness direction. With such a structure, the drive shaft engaging portion 53 is in a state of being elastically deformable, and can be engaged with the inner protruding portion 61 of the blower cover 72 described later.

The drive shaft protruding portion 56 is formed by projecting the left end side of the drive shaft engaging portion 53 on the paper surface toward the front. The drive shaft protrusion 56 engages with the inner protrusion 61 of the blower cover 72, which will be described later, from the inside in the radial direction. By doing so, unnecessary rotation of the drive shaft 74 is restricted by the blower cover 72, and only the internal rotation cover 73 is rotated with the positions of the drive shaft 74 and the blower cover 72 fixed in the front-rear direction. be able to.

With reference to FIG. 6B, the blower cover 72 is composed of the first main surface portion 80 and the first side surface portion 81 as described above, and penetrates by opening the central portion of the first main surface portion 80. A hole 86 is formed. A screw groove 59 is formed by partially recessing the inner side surface of the through hole 86 in the radial direction. The thread groove 59 is screwed with the thread 58 of the drive shaft 74 described above. The annular protrusion 60 is formed by projecting the main surface of the first main surface portion 80 around the through hole 86 in an annular shape toward the rear. The outer side surface of the annular protrusion 60 in the radial direction slides in contact with the inner side surface in the radial direction of the through hole 87 of the internal rotation cover 73 described above.

The inner protrusion 61 is formed by partially projecting the annular protrusion 60 inward to the rear of the radius. The position of the inner protrusion 61 in the radial direction coincides with the position of the drive shaft 74 in the radial direction of the drive shaft protrusion 56 described above. The shape of the inner protrusion 61 when the blower cover 72 is viewed from the rear is a substantially triangular shape that protrudes inward in the radial direction.

Further, the lateral protrusion 48 is formed by partially projecting the annular protrusion 60 toward the side in the radial direction. The lateral protrusion 48 is separated from the first main surface portion 80 in the front-rear direction. A plurality of lateral protrusions 48 are formed at substantially equal intervals along the circumferential direction. The second main surface portion 83 of the internal rotation cover 73 described above is arranged between the side protrusion 48 and the first main surface portion 80 of the blower cover 72. With this configuration, the position of the internal rotary cover 73 inside the blower cover 72 is held in a rotatable state in the front-rear and rear directions.

The shielding device 70 having the above configuration includes a fully open state in which the blower cover 72 is separated from the shielding lid 76, a fully closed state in which the air passage is almost completely blocked, and a semi-shielded state in which the air passage is partially shielded. Can be taken.

The fully open state will be described with reference to FIG. 7. 7 (A) is a perspective view showing the shielding device 70 in the fully open state, FIG. 7 (B) is a plan view showing the shielding device 70 in that state, and FIG. 7 (C) is a view of FIG. 7 (A). It is sectional drawing in CC line.

By rotating the drive bar 75 counterclockwise with reference to FIG. 7 (A), the rear end portions of the blower cover 72 and the internal rotation cover 73 are brought into contact with the shielding base 71 shown in FIG. 7 (C). I'm in contact. By doing so, the fully open state is realized.

As shown in FIG. 7B, here, by rotating the drive bar 75 counterclockwise with a motor (not shown), the boss 54 of the drive shaft 74 is rotated in the circumferential direction by the engaging portion 89 of the drive bar 75. Pushing to. By doing so, the drive shaft 74 rotates counterclockwise due to the pressing force of the drive bar 75 in the circumferential direction. As described above, since the screw structure is formed between the drive shaft 74 and the blower cover 72, when the drive shaft 74 rotates counterclockwise, the blower cover 72 faces forward until it reaches the fully open state. And move. Further, the internal rotary cover 73 built in the blower cover 72 also moves forward together with the blower cover 72.

In this fully open state, the first opening 79 of the blower cover 72 and the second opening 85 of the internal rotary cover 73 do not overlap in the circumferential direction. Therefore, no opening is formed on the side surface of the blower cover 72.

Further, the engaging portion 89 of the drive bar 75 is engaged with the engaged portion 90 of the internal rotation cover 73. Therefore, when the shielding device 70 is moved to the fully open state, the internal rotation cover 73 rotates together with the drive bar 75.

With reference to FIG. 7C, in this fully open state, the blower cover 72 and the internal rotary cover 73 are separated from the shielding lid 76. In other words, the side surface portions of the blower cover 72 and the internal rotary cover 73 are not arranged on the side of the blower 47. By forming a gap between the blower cover 72 and the internal rotating cover 73 and the shielding lid 76, the cold air blown by the blower 47 is blown toward the surroundings from this gap, and the shielding device 70 is fully opened. Become.

With reference to FIG. 3, when the shielding device 70 is fully opened, the blower port 27 and the blower 47 of the cooling chamber 26 are not shielded by the shielding device 70. Therefore, each supply air passage and the cooling chamber 26 communicate with each other. Therefore, the cold air blown by the blower 47 is blown to the refrigerating room 15 via the refrigerating room supply air passage 29, and is blown to the freezing room 17 via the freezing room supply air passage 31 to supply the vegetable room (not shown). It is blown to the vegetable compartment 20 via the air passage.

The fully closed state will be described with reference to FIG. 8 (A) is a perspective view showing the shielding device 70 in the fully closed state, FIG. 8 (B) is a plan view showing the shielding device 70 in that state, and FIG. 8 (C) is FIG. 8 (A). It is sectional drawing in the CC line of.

With reference to FIG. 8A, the blower cover 72 and the internal rotation cover 73 are brought into contact with the shielding lid 76 by rotating the drive bar 75 clockwise from the fully opened state described above.

As shown in FIG. 8B, here, by rotating the drive bar 75 clockwise with a motor (not shown), the boss 54 of the drive shaft 74 is rotated in the circumferential direction by the engaging portion 89 of the drive bar 75. I'm pushing. By doing so, the drive shaft 74 rotates clockwise due to the pressing force along the circumferential direction of the drive bar 75. When the drive shaft 74 rotates clockwise, the blower cover 72 and the internal rotation cover 73 move backward. Further, the internal rotary cover 73 built in the blower cover 72 also moves toward the rear together with the blower cover 72.

In this fully closed state, the first opening 79 of the blower cover 72 and the second opening 85 of the internal rotating cover 73 do not overlap in the circumferential direction. Therefore, no opening is formed on the side surface of the blower cover 72.

With reference to FIG. 8C, the rear end of the blower cover 72 and the internal rotary cover 73 are in contact with the shielding lid 76 from the front. Therefore, no gap is formed between the blower cover 72 and the internal rotating cover 73 and the shielding lid 76. Further, as described above, the first opening 79 of the blower cover 72 and the second opening 85 of the internal rotation cover 73 do not overlap with each other. Therefore, no opening is formed in the side surface portions of the blower cover 72 and the internal rotation cover 73. Therefore, the shielding device 70 is in a fully closed state in which the air passages connecting the cooling chamber 26 and each air passage are shielded.

With reference to FIG. 3, when the shielding device 70 is fully closed, the blower port 27 and the blower 47 of the cooling chamber 26 are shielded by the shielding device 70. Therefore, each supply air passage and the cooling chamber 26 do not communicate with each other. Therefore, cold air is not blown to the refrigerating room 15, the freezing room 17, and the vegetable room 20.

With such a configuration, for example, a defrosting process is performed. Specifically, in the defrosting process, a control device (not shown here) stops the compressor 44 and the blower 47 and energizes the defrosting heater 46 to heat the air in the cooling chamber 26. In such a defrosting process, since the shielding device 70 is in a fully closed state, each supply air passage and the cooling chamber 26 are separated, and the heated warm air is sent to each supply air passage via the air outlet 27. It is possible to prevent leakage to.

With reference to FIG. 8C, by setting the shielding device 70 in such a fully closed state, the first main surface portion 80 of the blower cover 72 is arranged in the vicinity of the front of the flange-shaped portion 55 of the drive shaft 74. To. Further, in this situation, the drive shaft engaging portion 53 of the drive shaft 74 shown in FIG. 6 and the inner protruding portion 61 of the blower cover 72 substantially coincide with each other in the circumferential position and the radial position. Therefore, the inner protrusion 61 engages with the inner protrusion 61. Specifically, referring to FIG. 6, the drive shaft projecting portion 56 projecting downward on the paper surface from the tip of the drive shaft engaging portion 53 engages with the inner projecting portion 61 of the blower cover 72 from the inside in the radial direction. do. The drive shaft protrusion 56 abuts against the inner protrusion 61 in the counterclockwise direction. At this time, the drive shaft engaging portion 53 engages with the inner protruding portion 61 in a state where the tip thereof is curved upward on the paper surface. Therefore, the drive shaft protruding portion 56 of the drive shaft engaging portion 53 is pressed against the inner protruding portion 61 of the blower cover 72 by the urging force generated by the bending of the drive shaft engaging portion 53, and the engagement between the two is strengthened. Can be. By such engagement, the drive shaft 74 and the blower cover 72 are coupled in the circumferential direction, and only the internal rotation cover 73 can be rotated while the drive shaft 74 does not rotate. Such matters will be described later.

The semi-shielded state will be described with reference to FIG. 9 (A) is a perspective view showing the shielding device 70 in the semi-shielding state, FIG. 9 (B) is a plan view showing the shielding device 70 in that state, and FIG. 9 (C) is FIG. 9 (A). It is sectional drawing in the CC line of. Here, the semi-shielded state is a state in which the rear opening of the blower cover 72 is closed and an opening is formed in the side surface portion of the blower cover 72.

With reference to FIG. 9A, the blower cover 72 and the internal rotation cover 73 are brought into contact with the shielding lid 76 by rotating the drive bar 75 counterclockwise from the fully closed state described above. The internal rotation cover 73 is being rotated as it is.

As described above with reference to FIG. 6, in the fully closed state, the drive shaft engaging portion 53 of the drive shaft 74 and the inner protruding portion 61 of the blower cover 72 are engaged in the rotational direction. Further, the blower cover 72 only advances and retreats in the front-rear direction, and does not rotate. That is, the drive shaft engaging portion 53 and the inner protruding portion 61 form an engaging structure that regulates the rotation of the drive shaft 74. Specifically, the drive shaft protruding portion 56 of the drive shaft engaging portion 53 and the inner protruding portion 61 engage with each other. Therefore, the rotation of the drive shaft 74 is restricted by such engagement. Therefore, until the drive bar 75 comes into contact with the boss 54, even if the drive bar 75 is rotated counterclockwise, the internal rotation cover 73 rotates, but the drive shaft 74 does not rotate. Therefore, since the drive shaft 74 does not rotate, the blower cover 72 does not move forward.

As shown in FIG. 9B, by doing so, the first opening 79 of the blower cover 72 and the second opening 85 of the internal rotation cover 73 can be superimposed in the circumferential direction. .. The portion where the first opening 79 and the second opening 85 overlap is the overlapping opening 91 formed on the side surface of the blower cover 72. By superimposing the first opening 79 and the second opening 85 on the entire surface, the area of the superposed opening 91 can be maximized. Further, by partially superimposing the first opening 79 and the second opening 85, the area of the superposed opening 91 is adjusted, and the amount of cold air blown through the superposed opening 91 is adjusted. can do.

With reference to FIG. 9C, the rear end of the blower cover 72 and the internal rotary cover 73 are in contact with the shielding lid 76 from the front. On the other hand, as described above, the overlapping opening 91 is formed in the lower part of the blower cover 72. Therefore, the shielding device 70 is in a semi-shielding state in which the air outlet 27 of the cooling chamber 26 is connected via the overlapping opening 91.

With reference to FIG. 3, when the shielding device 70 is in the semi-shielding state, cold air can be blown only from the air outlet 27 of the cooling chamber 26 to the desired storage chamber. For example, by directing the superposed opening 91 of the shielding device 70 shown in FIG. 9C toward the refrigerating room supply air passage 29, the cold air blown by the blower 47 is sent to the refrigerating room via the refrigerating room supply air passage 29. Only 15 can be blown. Further, by directing the superposed opening 91 of the shielding device 70 toward the freezing chamber supply air passage 31, the cold air blown by the blower 47 can be blown only to the freezing chamber 17 via the freezing chamber supply air passage 31. can. Further, by directing the superposed opening 91 of the shielding device 70 toward the vegetable compartment supply air passage (not shown here), the cold air blown by the blower 47 is blown only to the vegetable chamber 20 via the vegetable chamber supply air passage. can do.

As described above, the area of the superposed opening 91 can be arbitrarily adjusted by partially superimposing the first opening 79 and the second opening 85. Therefore, the amount of air blown to the refrigerating room 15, the freezing room 17, or the vegetable room 20 can be freely adjusted.

Here, when the drive bar 75 is further rotated counterclockwise from the semi-shielded state shown in FIG. 9, the drive bar 75 presses the boss 54, whereby the drive shaft engagement of the drive shaft 74 shown in FIG. 6 is engaged. The engagement between the joint portion 53 and the inner protrusion 61 of the blower cover 72 is disengaged. When the drive bar 75 keeps pushing the boss 54 in the circumferential direction, the drive shaft 74 is rotated counterclockwise, and the blower cover 72 moves forward. Further, by rotating the drive bar 75 counterclockwise, the internal rotation cover 73 rotates. Therefore, the first opening 79 of the blower cover 72 and the second opening 85 of the internal rotation cover 73 do not overlap with each other, and the above-mentioned overlapped opening 91 is closed. As a result, the fully opened state shown in FIG. 7 is reached.

As described above, the shielding device 70 according to the present embodiment can realize the above-mentioned fully open state, fully closed state, and semi-shielding state by rotating the drive bar 75 shown in FIG. Therefore, since cold air can be selectively blown to a predetermined storage chamber with a simple configuration, it is possible to form each supply air passage by omitting the conventional damper. Further, since the shielding device 70 does not have a member that is displaced outward in the radial direction, the size occupied by the shielding device 70 in the radial direction can be reduced.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention.

For example, with reference to FIG. 5A, a plurality of first openings 79 may be formed in the blower cover 72, and a plurality of second openings 85 may be formed in the internal rotation cover 73. As a result, by rotating the internal rotation cover 73 inside the blower cover 72, the plurality of first openings 79 and the plurality of second openings 85 are appropriately superimposed or non-superimposed, and various air passage switching and various air passage switching and non-superimposition are performed. The air volume can be adjusted.

10 Refrigerator 11 Insulation box body 12 Outer box 13 Inner box 14 Insulation material 15 Refrigerator room 16 Refrigerator room 17 Freezer room 18 Upper freezer room 19 Lower freezer room 20 Vegetable room 21 Insulation door 22 Insulation door 23 Insulation door 24 Insulation door 25 Insulation door 25 26 Cooling room 27 Air outlet 28 Return port 29 Refrigerator room supply air passage 31 Refrigerator room supply air passage 33 Air outlet 34 Air outlet 37 Vegetable room Return air passage 38 Return port 39 Return port 42 Insulation partition wall 43 Insulation partition wall 44 Compressor 45 Refrigerator 46 Defrost heater 47 Blower 48 Side protrusion 53 Drive shaft engaging part 54 Boss 55 Flip-shaped part 56 Drive shaft protrusion 57 Cylindrical part 58 Thread 59 Thread groove 60 Circular protrusion 61 Inner protrusion 62 Tip 63 Intermediate 64 Base 65 Partition 66 Partition 67 Front cover 70 Shielding device 71 Shielding base 72 Blower cover 73 Internal rotating cover 74 Drive shaft 75 Drive bar 76 Shielding lid 77 Support 78 Support 79 First opening 80 1st main surface 81 1st side surface 82 Insertion hole 83 2nd main surface 84 2nd side surface 85 2nd opening 86 Through hole 87 Through hole 88 Opening 89 Engagement part 90 Engagement part 91 Overlapping opening 100 Refrigerator 101 Refrigerator room 102 Freezer room 103 Vegetable room 104 Cooling room 105 Section wall 106 Opening 107 Blower 108 Cooler 109 Air passage 110 Cover 111 Concave 113 Opening 114 Damper

Claims (7)

It is a shielding device that blocks the air passage of the refrigerator.
With a blower,
It has a first main surface portion, a first side surface portion erected from a peripheral portion of the first main surface portion, and a first opening portion formed by partially opening the first side surface portion. , The blower cover that moves along the rotation axis direction of the blower,
By rotatably arranging inside the blower cover, the second main surface portion, the second side surface portion erected from the peripheral portion of the second main surface portion, and the second side surface portion are partially opened. It comprises a formed second opening and an internal rotating cover that moves along with the blower cover along the direction of rotation of the blower .
By making the circumferential position of the first opening of the blower cover different from that of the second opening of the internal rotating cover, the air passage is shielded and closed.
The first opening of the blower cover and the second opening of the internal rotating cover are overlapped to form a superposed opening, and the open state is such that air can be blown from the superposed opening. A shielding device. A drive shaft that moves the blower cover together with the internal rotation cover along the rotation axis of the blower.
A drive bar for rotating the internal rotation cover by the driving force of the motor is further provided.
The shielding device according to claim 1, wherein the drive shaft and the drive bar are driven by the same drive unit . A contact portion is formed in which the drive shaft is partially projected.
The shielding device according to claim 2, wherein the drive shaft rotates when the drive bar presses the contact portion along the circumferential direction. The drive shaft is a drive in which a cylindrical portion, a flange-shaped portion formed from one end side of the tubular portion toward the outside in the radial direction, and a part of the flange-shaped portion are projected toward the blower cover side. With a shaft engaging part,
The shielding device according to any one of claims 1 to 3, wherein the blower cover has an inner protruding portion having the first main surface portion projected in the thickness direction. The drive shaft engaging portion is formed elongated along the circumferential direction.
A drive shaft projecting portion is formed by projecting one end side of the drive shaft engaging portion, which is a free end, toward the blower cover side.
The shielding device according to claim 4, wherein the drive shaft protrusion engages with the inner protrusion of the blower cover. Further provided with a shielding wall which is arranged at a position facing the blower cover across the blower and has an opening through which the cold air blown by the blower flows.
When the blower cover and the internal rotating cover are separated from the shielding wall, the air passage is fully opened.
The blower cover and the internal rotating cover come into contact with the shielding wall, and the circumferential positions of the first opening and the second opening are different from each other, so that the air passage is completely closed.
The internal rotation cover rotates while the blower cover and the internal rotation cover are in contact with the shielding wall, so that the first opening and the second opening overlap to form the overlapped opening. The shielding device according to any one of claims 1 to 5, wherein the shielding device is in a half-open state in which air can be blown from the superposed opening. A refrigerating cycle cooler that cools the air supplied to the storage chamber via the air passage, and
A cooling chamber in which the cooler is arranged and an air outlet connected to the storage chamber is formed.
A refrigerator comprising the shielding device according to any one of claims 1 to 6, which partially closes the air outlet.

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