CN211977334U - Air door device for refrigerator and refrigerator with same - Google Patents
Air door device for refrigerator and refrigerator with same Download PDFInfo
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- CN211977334U CN211977334U CN202020226050.2U CN202020226050U CN211977334U CN 211977334 U CN211977334 U CN 211977334U CN 202020226050 U CN202020226050 U CN 202020226050U CN 211977334 U CN211977334 U CN 211977334U
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- sheave
- damper device
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- opening
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Abstract
The present disclosure provides a damper device for a refrigerator, including a frame having an opening portion, a shutter, and a driving mechanism for driving the shutter to rotate between a closed position closing the opening portion and an open position opening the opening portion. The drive mechanism includes: a stepping motor; a dial having a lever; and the grooved wheel is provided with a grooved wheel groove matched with the shifting rod. The stepping motor can drive the drive plate to rotate, the groove wheel is driven by the drive rod of the drive plate to rotate, and the groove wheel drives the baffle to rotate. The present disclosure also provides a refrigerator having the damper device, including: a storage chamber; a cold air passage for transferring cold air into the storage chamber; the opening part of the air door device is arranged in the cold air channel, and the baffle plate of the air door device can open or close the opening part so as to connect or block the cold air channel. The utility model discloses an air door device has simple structure, operates steadily, controls accurate advantage for the refrigerator including it has cost and performance advantage.
Description
Technical Field
The present disclosure relates to a damper device for a refrigerator and a refrigerator having the same.
Background
As a common household appliance, a refrigerator has its main functions including storage, freshness preservation, and the like. The refrigerator may have a plurality of storage compartments for storing different kinds of foods or other articles. Typically, different storage chambers need to be maintained at different temperature levels. To this end, the refrigerator is provided with cold air passages leading to the respective storage chambers. Each cold air channel can be provided with a wind door device to change the cold air quantity by changing the opening and closing of each cold air channel, thereby realizing the dynamic regulation of the temperature of each storage chamber.
In the existing air door scheme of the refrigerator, a multi-stage gear transmission mechanism is mostly adopted to drive a baffle of an air door device to rotate. The multi-stage gear transmission mechanism has a complex structure and high manufacturing cost. Moreover, when the baffle is completely opened and closed, a stalling phenomenon exists between the gears, which can generate abnormal sound and easily cause a tooth breaking phenomenon. Accordingly, it is desirable to provide a damper apparatus for a refrigerator which is simple in structure, quiet in operation and reliable.
SUMMERY OF THE UTILITY MODEL
In a first aspect of the present invention, there is provided a damper device for a refrigerator, comprising a frame having an opening portion, a baffle plate, and a driving mechanism for driving the baffle plate to rotate between a closed position for closing the opening portion and an open position for opening the opening portion. The drive mechanism includes: a stepping motor; a dial having a lever; and the grooved wheel is provided with a grooved wheel groove matched with the shifting rod. The stepping motor can drive the drive plate to rotate, the groove wheel is driven by the drive rod of the drive plate to rotate, and the groove wheel drives the baffle to rotate.
Optionally, the damper device further includes a housing attached to the frame, the bottom plate portion of the frame facing the base plate portion of the housing, the dial and the sheave are both located between the bottom plate portion and the base plate portion, the stepper motor is located on a side of the base plate portion of the housing facing away from the bottom plate portion, and the baffle is located on a side of the base plate portion of the frame facing away from the base plate portion.
Alternatively, the dial includes a first end portion rotatably supported on a first support portion on the bottom plate portion of the frame, and a second end portion rotatably supported on a third support portion on the base plate portion of the housing, and the second end portion has a power input portion connected to an output portion of the stepping motor.
Optionally, the sheave includes a first end portion rotatably supported on the second support portion on the floor portion of the frame and a second end portion rotatably supported on the fourth support portion on the base plate portion of the housing, and the first end portion has a power output portion connected to an end of the damper.
Alternatively, the bottom plate portion of the frame includes a support portion, the base plate portion of the housing includes a through hole, and the ear portion of the stepping motor is mounted to the support portion by a connector passing through the through hole.
Optionally, the wheel groove extends in a radial direction from the outer opening to the inner root; the shift lever is configured to be able to enter or exit the wheel groove via the outer side opening, and to be able to linearly reciprocate within the wheel groove relative to the wheel groove.
Optionally, the dial comprises a base and a groove between the base and the stem; the grooved wheel includes a first outer portion and a second outer portion on both sides of the wheel groove, and the first outer portion or the second outer portion enters the inside of the groove when the lever reciprocates in the wheel groove.
Optionally, the dial comprises a first convex locking arc on the first side of the toggle, and the sheave comprises a first concave locking arc on the first side of the sheave; when the flapper is in the open position, the first convex locking arc extends into the first concave locking arc, preventing the first concave locking arc from rotating past the first convex locking arc, whereby the dial prevents the sheave from rotating.
Optionally, the dial comprises a second convex locking arc on a second side opposite the toggle, and the sheave comprises a second concave locking arc on a second side opposite the sheave; when the shutter is in the closed position, the second convex locking arc extends into the second concave locking arc, preventing the second concave locking arc from rotating beyond the second convex locking arc, and thus the dial prevents the sheave from rotating.
Optionally, the drive plate comprises a first limiting surface and a second limiting surface, when the first limiting surface abuts against the first limiting portion, the drive plate is prevented from rotating along a first direction, when the second limiting surface abuts against the second limiting portion, the drive plate is prevented from rotating along an opposite second direction, and the first limiting portion and the second limiting portion limit a rotation angle range beta of the drive plate.
Optionally, the sheave has an angular range of rotation α corresponding to the angular range of rotation of the flapper between the open position and the closed position, α, β having the following relationship: beta is larger than or equal to k.alpha, and k is the transmission ratio between the driving plate and the grooved wheel.
Optionally, the sheave includes a third limiting surface and a fourth limiting surface, when the third limiting surface abuts against the third limiting portion, the sheave is prevented from rotating in the second direction, when the fourth limiting surface abuts against the fourth limiting portion, the sheave is prevented from rotating in the opposite first direction, and the third limiting portion and the fourth limiting portion limit the rotation angle range α of the sheave.
Optionally, after the baffle reaches the opening position, the rotation of the grooved wheel along the second direction is stopped, the dial rotates for a certain angle along the first direction, and then the first limit surface abuts against the first limit part to prevent the dial from rotating along the first direction; and/or after the baffle reaches the closing position, the grooved wheel stops rotating along the first direction, the dial idles for a certain angle along the second direction, and then the second limiting surface abuts against the second limiting part to prevent the dial from rotating along the second direction.
Optionally, the first, second, third and fourth limiting portions are all disposed on the bottom plate portion of the frame and extend out toward the base plate portion of the housing.
In a second aspect of the present invention, there is provided a refrigerator, comprising: a storage chamber; a cold air passage for transferring cold air into the storage chamber; and any one of the air door devices, wherein the opening part of the air door device is arranged in the cold air channel, and the baffle plate of the air door device can open or close the opening part so as to connect or block the cold air channel.
Drawings
FIG. 1 shows a perspective view of a damper assembly in an open condition;
FIG. 2 shows a perspective view of the damper assembly in a closed condition;
FIG. 3 shows an exploded perspective view of the damper assembly;
FIG. 4 shows an explanatory diagram of the framework;
fig. 5 shows an explanatory view of the housing;
fig. 6 and 7 show explanatory views of the dial;
fig. 8 and 9 show explanatory views of the sheave;
FIGS. 10 and 11 show side and explanatory views of a portion of the damper device in a closed state;
FIGS. 12 and 13 show side and explanatory views of a portion of the damper device in an open state;
Detailed Description
In order to make the objects, aspects and advantages of the technical solutions of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be described below in detail and completely with reference to the accompanying drawings of specific embodiments of the present disclosure. Like reference symbols in the various drawings indicate like elements. It should be noted that the described embodiments are only some of the embodiments of the present disclosure, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.
Unless otherwise indicated, terms used herein have their ordinary meaning in the art, e.g., "axial" refers to a direction along a central axis, "circumferential" refers to a direction perpendicular to and about the respective central axis, "radial" refers to a direction perpendicular to and directed toward the respective central axis, and a side closer to the central axis is referred to as "radially inward" and a side farther from the central axis is referred to as "radially outward".
-damper device
Referring to fig. 1 to 3, a damper device 10 for a refrigerator according to the present invention includes a frame 100, the frame 100 being provided with an opening portion 101, the opening portion 101 being provided in a cool air passage leading to a corresponding storage chamber. The shutter 300 is rotatably mounted on the frame 100, and is rotatable between an open position (fig. 1) to open the opening portion 101 and a closed position (fig. 2) to close the opening portion 101 to allow or block the entry of cold air into the corresponding storage chamber. By controlling the opening time of the damper 300, the amount of cold air introduced into the storage chamber can be adjusted, thereby adjusting the temperature in the storage chamber.
The damper device 10 also includes a housing 200 mounted to one side of the frame 100. Referring to the exploded perspective view shown in fig. 3, the frame 100 is provided with a bottom plate portion 102 on the baffle 300 side and in a plane perpendicular to the baffle 300. The housing 200 is attached to the base portion 102, for example, by a detachable snap-fit structure as shown in fig. 3, a screw connection, welding, etc. may be used instead. The housing 200 and the bottom plate portion 102 enclose a drive chamber therebetween for accommodating at least a portion of the drive mechanism 400.
The driving mechanism 400 is used for driving the baffle 300 to rotate, and may specifically include a stepping motor 401, a dial 402 directly connected to the stepping motor 401, and a sheave 403 driven by the dial 402, an output portion of the sheave 403 being connected to one end portion of the baffle 300. The stepper motor 401 may drive the flapper 300 to rotate between the open and closed positions via the dial 402 and the sheave 403. As shown in fig. 3, both the dial 402 and the sheave 403 are provided within the drive chamber, i.e., between the bottom plate portion 102 of the frame 100 and the base plate portion 201 of the housing 200; and the stepping motor 401 may be provided on the side of the substrate portion 201 of the housing 200 that faces away from the frame 100 (i.e., the outside of the drive chamber). Specifically, the output shaft of the stepping motor 401 may enter the drive chamber through the base plate portion 201 of the housing 200 and be connected to the dial 402 in the drive chamber. The arrangement of the stepping motor 401 outside the driving chamber helps to minimize the space of the driving chamber, making the structure compact, relative to the case where the stepping motor 401 is arranged inside the driving chamber.
As shown in fig. 3, an elastic member 301 may be provided on a side of the shutter 300 facing the opening 101. When the shutter 300 is rotated to the closed position, the elastic member 301 is elastically deformed and is interposed between the shutter 300 and the end plate portion 103 enclosing the opening portion 101 to provide a good sealing effect. In addition, on the end plate portion 103 (inside or outside), a heating element may be disposed around the opening portion 101, and the heating element is used to provide heat around the opening portion 101, which effectively prevents the baffle 300 from freezing on the frame 100 due to frost formation, and ensures that the baffle 300 can be normally opened.
-mounting structure
Fig. 4 shows an explanatory view of the frame 100 toward the side of the housing 200, and fig. 5 shows an explanatory view of the housing 200 toward the side of the frame 100. The frame 100 has a bottom plate portion 102 facing the housing 200, and the housing 200 has a base plate portion 201 facing the bottom plate portion 102. The bottom plate portion 102 and the base plate portion 201 are provided with a mounting structure for mounting the components of the drive mechanism 400.
Referring to fig. 4, the bottom plate portion 102 of the frame 100 has a first support portion 411 for rotatably supporting one end of the dial 402; referring to fig. 5, the base plate portion 201 of the housing 200 has a third bearing 413 for rotatably supporting the axially opposite other end of the dial 402. The first and third supporting portions 411 and 413 each protrude toward the inside of the driving chamber. The first support 411 may be cylindrical with an inner periphery defining a rotational bearing surface for supporting a cylindrical bearing at the dial first end 432 of the dial 402. The third support 413 may be cylindrical, an inner periphery of which defines a rotational support surface for supporting a cylindrical support at the dial second end portion 433 of the dial 402, and, inside the third support 413, a housing through hole 202 for passing therethrough an output shaft of the stepping motor 401 is formed through the base plate portion 201.
Referring to fig. 4, the bottom plate portion 102 of the frame 100 further has a second support portion 412 for rotatably supporting one end of the sheave 403; referring to fig. 5, the base plate portion 201 of the housing 200 also has a fourth bearing portion 414 for rotatably supporting the axially opposite other end of the sheave 403. The second and fourth support portions 412, 414 each protrude toward the inside of the drive chamber. The second support portion 412 may be cylindrical, an inner periphery of which defines a rotation support surface for supporting a cylindrical support portion at the sheave first end portion 452 of the sheave 403, and, inside the second support portion 412, a frame through hole 104 for the output shaft of the sheave 403 to pass therethrough is formed through the bottom plate portion 102. The fourth bearing 414 may be cylindrical with an outer periphery defining a rotational bearing surface for supporting a cylindrical bearing at the sheave second end 453 of the sheave 403.
The bottom plate portion 102 of the frame 100 also has a plurality of support portions 415 for mounting the stepping motor 401; the base plate portion 201 of the housing 200 has a plurality of through holes 416 aligned with the positions of the support portions 415. Referring to fig. 3, the stepping motor 401 has a plurality of ears 417, and each ear 417 may be fastened to the supporting portion 415 by a connection member 418 (e.g., a screw) passing through the through hole 416, thereby stably mounting the stepping motor 401 on the frame 100, whereby vibration during operation of the stepping motor 401 may be prevented from being transmitted to the barrier 300 along a transmission path of the dial 402 and the sheave 403, reducing noise.
As shown in fig. 4, the bottom plate portion 102 of the frame 100 may have a first stopper portion 421 and a second stopper portion 422 for stopping the rotation of the dial 402 by abutting the dial 402, thereby defining the rotation range of the dial 402. As an example, both the first stopper portion 421 and the second stopper portion 422 may be formed to protrude from the end surface of the first support portion 411 on the frame 100, away from the center of the first support portion 411, and spaced apart in the circumferential direction by an angle β, which is the maximum angular range in which the dial 402 can be rotated. In other alternative embodiments, at least one of the first and second position limiting portions 421 and 422 may be provided on the base plate portion 201 of the housing 200.
As shown in fig. 4, the bottom plate portion 102 of the frame 100 may also have a third stopper portion 423 and a fourth stopper portion 424 for preventing the rotation of the sheave 403 by abutting the sheave 403, thereby defining the rotation range of the sheave 403. As an example, the third stopper portion 423 and the fourth stopper portion 424 may be formed to protrude from the surface of the bottom plate portion 102 of the frame 100 away from the center of the second support portion 412 and be circumferentially spaced apart by an angle α, which is the maximum angular range over which the sheave 403 can rotate. In other alternative embodiments, at least one of the third stopper portion 423 and the fourth stopper portion 424 may be provided on the base plate portion 201 of the housing 200.
In other embodiments not shown, the four stopper portions shown may be formed at other positions, for example, at least one of them may be formed on the base plate portion 201 of the housing 200 as long as they can abut the dial 402 or the grooved wheel 403 and define the rotational angle range thereof.
Dials and sheaves
The structure of the dial 402 and the sheave 403 according to an embodiment of the present invention is described below with reference to fig. 6 to 9. The dial 402 and the sheave 403 form a sheave transmission mechanism, which has many advantages such as simple structure, easy processing, high mechanical efficiency, high control precision, stable and reliable operation, and the like, compared with the multi-stage gear transmission mechanism in the prior art.
As shown in fig. 6 and 7, the dial 402 includes a dial portion 431, a dial first end portion 432 located on a first side in the axial direction of the dial portion 431, and a dial second end portion 433 located on a first side in the axial direction opposite to the dial portion 431. The dial first end portion 432 is formed in a cylindrical shape axially protruding from the first side surface of the dial portion 431 and is coaxially inserted into the cylindrical first supporting portion 411, so that the outer peripheral surface of the dial first end portion 432 is rotatably supported on the rotational supporting surface of the inner periphery of the first supporting portion 411 to support the dial 402 to rotate smoothly. The dial second end portion 433 is also formed in a cylindrical shape axially protruding from the opposite second side surface of the dial portion 431 and is coaxially inserted into the cylindrical third support portion 413, so that the outer peripheral surface of the dial second end portion 433 is rotatably supported on the rotational support surface of the inner periphery of the third support portion 413 to support the dial 402 to rotate smoothly. In other embodiments, the dial first end 432 and the mating first support 411, and the dial second end 433 and the mating third support 413, may also be formed as other forms of rotational support structures.
The dial second end portion 433 has a power input portion 434, which may be, as shown in fig. 6 by way of example, a shaft hole 434 formed axially recessed in an end surface of the dial second end portion 433. The shaft hole 434 may engage an output shaft of the stepping motor 401 passing through the housing through hole 202. Shaft hole 434 may have a flat surface for mating with a corresponding flat surface on the output shaft of stepper motor 401, effecting a keyed fit and transmitting torque. In other embodiments, the power input 424 and the output of the stepper motor may form other forms of torque transfer structures.
As shown in fig. 8 and 9, the sheave 403 includes a sheave portion 451, a sheave first end portion 452 on a first side in the axial direction of the sheave portion 451, and a sheave second end portion 453 on a second side opposite to the axial direction of the sheave portion 451. The sheave first end portion 452 axially projects from the first side surface of the sheave portion 451 to form a cylindrical shape, which is coaxially inserted inside the cylindrical second support portion 412, so that the outer peripheral surface of the sheave first end portion 452 is rotatably supported on the rotation support surface of the inner periphery of the second support portion 412 to support the sheave 403 to rotate smoothly. The sheave second end 453 is axially recessed in a cylindrical shape at an opposite second side surface of the sheave portion 451 and coaxially receives the cylindrical fourth bearing portion 414 such that an inner circumferential surface of the sheave second end 453 is rotatably supported on a rotation supporting surface of an outer circumference of the fourth bearing portion 414 to support the sheave 403 to rotate smoothly. In other embodiments, the sheave first end 452 and the cooperating second support 412, and the sheave second end 453 and the cooperating fourth support 414, may also be formed as other forms of rotational support structures.
The sheave first end portion 452 has a power take-off 454, which may be, for example, a shaft portion 454 formed to axially project on an end surface of the sheave first end portion 452, as shown in fig. 8. The shaft portion 454 may be connected to a corresponding shaft hole provided at an end of the barrier 300 through the frame through hole 104 of the frame 100. Shaft portion 454 may have a flat surface for engaging a corresponding flat surface in the axial bore of shutter 300, achieving a keyed engagement and transmitting torque. In other embodiments, the power take-off 454 and the end of the damper 300 may form other forms of torque transmitting structures.
The sheave portion 451 has a base portion 455 and a sheave 456 radially recessed from an outer peripheral surface of the base portion 455. As shown in fig. 8, the base 455 may have a generally fan-like shape. The pulley groove 456 extends linearly in a radial direction from an outer opening located on an outer peripheral surface of the base 455 toward an inner root by a length suitable for receiving the aforementioned shift lever 436 of the dial 402 into the interior of the pulley groove 456 via the outer opening as shown and reciprocating linearly therein. The outboard opening of the wheel slot 456 may demarcate the base 455 into a first outboard portion 458 and a second outboard portion 459 on either side of the wheel slot 456. At the outer peripheries of the first outside portion 458 and the second outside portion 459 of the base 455, two female locking arcs 457 are formed. Each concave locking arc 457 is concave in a direction toward the center of the sheave 403. Each female locking arc 457 is adapted to engage a corresponding male locking arc 438 to provide a locking action. In addition, as shown in fig. 8, on two circumferential side surfaces of the base 455, a limiting surface is formed, which may be a plane, and is referred to as a third limiting surface 460 and a fourth limiting surface 461 respectively, and is used for abutting against the third limiting portion 423 and the fourth limiting portion 424 respectively, so that the rotation angle range of the sheave 403 is limited by the angle between the two limiting portions.
In addition, as shown in fig. 6 to 9, a recess having a certain depth may be formed at appropriate positions of the front and rear surfaces of the web 439 of the dial 402 and the front and rear surfaces of the base 455 of the sheave 403 for weight reduction.
Operating mechanism of the drive mechanism
The operation of the driving mechanism 400 according to the embodiment of the present invention will be described with reference to fig. 10 to 13.
When the damper 300 of the damper device is closed, the stepping motor 401 drives the dial 402 to rotate clockwise (see fig. 10), the rod 436 of the dial 402 enters the wheel groove 456 of the sheave 403 and pushes the sheave 403 to rotate counterclockwise, and then the damper 300 is driven to rotate to open; during movement of the toggle 436 from the outboard opening of the wheel slot 456 toward the inboard root, the first outboard portion 458 of the sheave 403 may enter the groove 440 of the dial 402 without interfering with rotation of the dial 402; during the movement of the toggle 436 from the inboard root of the wheel slot 456 to the outboard opening, the second outboard portion 459 of the sheave 403 may enter the groove 440 of the dial 402 without interfering with the rotation of the dial 402; after toggle 436 is clear of wheel slot 456, as shown in fig. 12, second female detent arc 457-2 at the outer circumference of second outer portion 459 of grooved wheel 403 engages second male detent arc 438-2 on the second side of toggle 436, at which time flapper 300 is rotated to the closed position.
After the flapper 300 reaches the closed position, as shown in fig. 12 and 13, the second male locking arc 438-2 extends into the interior of the second female locking arc 457-2, blocking the second female locking arc 457-2 from rotating past the second male locking arc 438-2, and therefore, the dial 402 will prevent the sheave 403 from rotating in the opposite direction, thereby stably locking the sheave 403 and the flapper 300 in the closed position. In the closed position, the shutter 300 will not rotate towards the open position due to the rebound action of the elastic elements 301 on the shutter 300, the pushing action of the cold air on the shutter 300, vibrations, etc., which can ensure the tightness of the closing of the shutter 300, improve the accuracy of the temperature control and reduce the noise problems during operation. In addition, the second position-limiting surface 442 of the position-limiting column 437 on the dial 402 will abut against the second position-limiting portion 422 on the frame 100, and the second position-limiting portion 422 will prevent the dial 402 from continuing to rotate, thereby blocking the stepping motor 401.
When the damper 300 of the damper device is opened, the stepping motor 401 drives the dial 402 to rotate counterclockwise, the deflector rod 436 of the dial 402 enters the wheel groove 456 of the sheave 403 and pushes the sheave 403 to rotate clockwise, and then the damper 300 is driven to rotate and close; during movement of the toggle 436 from the outboard opening of the wheel slot 456 to the inboard root, the second outboard portion 459 of the sheave 403 may enter the groove 440 of the dial 402 without interfering with rotation of the dial 402; during movement of the toggle 436 from the inboard root of the wheel slot 456 to the outboard opening, the first outboard portion 458 of the sheave 403 may enter the groove 440 of the dial 402 without interfering with rotation of the dial 402; after toggle 436 is clear of wheel slot 456, as shown in fig. 10, a first female locking arc 457-1 at the outer peripheral surface of first outer section 458 of sheave 403 engages a first male locking arc 438-1 at the first side of toggle 436, at which time flapper 300 is rotated to the open position.
After the flapper 300 reaches the open position, as shown in fig. 10 and 11, the first male locking arc 438-1 extends into the interior of the first female locking arc 457-1, blocking the first female locking arc 457-1 from rotating past the first male locking arc 438-1, and therefore, the dial 402 will prevent the sheave 403 from rotating in the opposite direction, thereby stably locking the sheave 403 and the flapper 300 in the open position. In the open position, the flapper 300 will not rotate toward the closed position due to vibration, air flow fluctuations, etc., which may reduce noise problems during operation of the damper assembly. In addition, the first limit surface 441 of the limit post 437 on the dial 402 abuts against the first limit portion 421 on the frame 100, and the first limit portion 421 prevents the dial 402 from continuing to rotate, thereby blocking the stepping motor 401.
In the illustrated embodiment, when the flap 300 is rotated to the open position, the third stop surface 460 on the sheave 403 may abut the third stop portion 423 on the frame 100 to prevent further rotation of the sheave 403 and the flap 300 in the clockwise/second direction, as shown in fig. 10; when the damper 300 is rotated to the closed position, the fourth limit surface 461 on the sheave 403 may abut the fourth limit portion 424 on the frame 100 to prevent the sheave 403 and the damper 300 from further rotating in the counterclockwise/first direction, as shown in fig. 12. The third stopper surface 423 and the fourth stopper portion 424 may be used to precisely limit the rotation angle range α of the baffle 300, which may be 1-90 degrees, 15-75 degrees, 30-60 degrees, 40-50 degrees, such as 45 degrees, 60 degrees, etc., as shown in fig. 11 and 13, which is an embodiment with a rotation angle of 60 degrees; also, the third and fourth retaining portions 423, 424 may abut the sheave 403 when the damper 300 is in the open or closed position, which helps to further retain the sheave 403 in a fixed position, reduces accidental rocking of the sheave 403 and the damper 300, and reduces noise.
Referring to fig. 12, there are shown a rotational angle range β of the dial 402 defined by the first stopper portion 421 and the second stopper portion 422, and a rotational angle range α of the sheave 403 defined by the third stopper portion 423 and the fourth stopper portion 424, which is also a rotational angle range of the shutter 300 between the open position and the closed position. Generally, the transmission ratio between the dial 402 and the grooved wheel 403 is required to be beta ≧ k · alpha, k, which is related to the structural dimensions of the dial 402 and the grooved wheel 403, and can be appropriately designed according to the specific situation. In particular, it is advantageous to provide β > k · α, which helps to allow the stepper motor 401 to freewheel by a certain angle after the shutter 300 is opened or closed. Here, "idling" refers to a case where the rotation of the stepping motor 401 is not transmitted to the shutter 300. Specifically, at the time when the shutter 300 reaches the open position or the closed position, the stopper pin 437 of the dial 402 does not abut against the first stopper 421 or the second stopper 422. Since the concave locking arc 457 does not prevent the corresponding convex locking arc 438 from continuing to rotate forward, the first limit portion 421 (during the door opening operation) or the second limit portion 422 (during the door closing operation) abuts against the limit post 437 of the dial 402 after the dial 402 rotates at a certain angle, so that the dial 402 is prevented from rotating, and the stepping motor 401 is locked. In this case, the stalling time of the stepping motor 401 can be shortened, the stepping motor 401 is prevented from being damaged, and the output accuracy of the stepping motor 401 is improved.
The damper device proposed by the present disclosure can be used for various types of refrigerators. The refrigerator includes one or more storage chambers, and one or more cold air passages respectively leading to the one or more storage chambers. The damper device provided above may be installed in a refrigerator such that the opening portions thereof are provided in the respective cold air passages, so that the delivery amount of cold air into the storage chamber through the cold air passages can be controlled by controlling the opening and closing of the opening portions of the respective damper devices, thereby adjusting the temperature in the storage chamber.
Exemplary embodiments of the present disclosure have been described in detail above with reference to preferred embodiments, however, it will be understood by those skilled in the art that various changes and modifications may be made to the specific embodiments described above, and various combinations of the various technical features and structures presented in the present disclosure may be made without departing from the concept of the present disclosure, and the scope of the present disclosure is determined by the appended claims.
List of reference numerals
10 damper device 431 dial part
100 frame 432 dial first end
101 opening 433 dials second end
102 bottom plate portion 434 power input portion
103 end plate portion 435 base
104 frame through hole 436 deflector rod
200 housing 437 spacing post
201 base plate portion 438 convex locking arc
202 housing throughbore 438-1 first convex locking arc
300 baffle 438-2 second convex locking arc
301 elastic element 439 web
400 driving mechanism 440 groove
401 first limit surface of step motor 441
402 second limit surface of the dial 442
403 sheave 451 sheave part
411 first support 452 sheave first end
412 second support 453 sheave second end
413 third support 454 power take-off
414 fourth support 455 base
415 support 456 wheel groove
416 penetration 457 concave locking arc
417 ear 457-1 first female locking arc
418 connection 457-2 second female locking arc
421 first limiting part 458 first outside part
422 second outside part of the second position-limiting part 459
423 third position-limiting part 460 third position-limiting surface
424 fourth position-limiting part 461 fourth position-limiting surface
Claims (15)
1. A damper device (10) for a refrigerator includes a frame (100) having an opening portion (101), a shutter (300), and a drive mechanism (400) for driving the shutter (300) to rotate between a closed position closing the opening portion (101) and an open position opening the opening portion (101),
it is characterized in that the preparation method is characterized in that,
the drive mechanism (400) comprises:
a stepping motor (401);
a dial (402) having a toggle lever (436); and
a sheave (403) having a sheave groove (456) that mates with the lever (436),
the stepping motor (401) can drive the dial (402) to rotate, the shifting rod (436) of the dial (402) shifts the grooved wheel (403) to rotate, and the grooved wheel (403) drives the baffle (300) to rotate.
2. The damper device according to claim 1, further comprising a housing (200) attached to the frame (100), the bottom plate portion (102) of the frame (100) facing the base plate portion (201) of the housing (200), the dial (402) and the sheave (403) each being located between the bottom plate portion (102) and the base plate portion (201), the stepper motor (401) being located on a side of the base plate portion (201) of the housing (200) facing away from the bottom plate portion (102), the baffle (300) being located on a side of the base plate portion (102) of the frame (100) facing away from the base plate portion (201).
3. The damper device of claim 2,
the dial (402) includes a dial first end portion (432) and a dial second end portion (433), the dial first end portion (432) is rotatably supported on a first support portion (411) on a bottom plate portion (102) of the frame (100), the dial second end portion (433) is rotatably supported on a third support portion (413) on a base plate portion (201) of the housing (200), and the dial second end portion (433) has a power input portion (434), the power input portion (434) is connected to an output portion of the stepping motor (401).
4. The damper device of claim 2,
the sheave (403) includes a sheave first end portion (452) and a sheave second end portion (453), the sheave first end portion (452) is rotatably supported on a second support portion (412) on the bottom plate portion (102) of the frame (100), the sheave second end portion (453) is rotatably supported on a fourth support portion (414) on the base plate portion (201) of the housing (200), and the sheave first end portion (452) has a power output portion (454), the power output portion (454) is connected to an end portion of the baffle plate (300).
5. The damper device of claim 2,
the bottom plate portion (102) of the frame (100) includes a support portion (415), the base plate portion (201) of the case (200) includes a through hole (416), and an ear portion (417) of the stepping motor (401) is mounted to the support portion (415) by a connection member (418) passing through the through hole (416).
6. The damper device of claim 1,
a wheel groove (456) extending in the radial direction from the outer opening to the inner root;
the shift lever (436) is configured to be able to enter or exit the pulley groove (456) via the outer opening, and to be linearly reciprocated within the pulley groove (456) relative to the pulley groove (456).
7. The damper device of claim 6,
the dial (402) includes a base (435) and a recess (440) between the base (435) and the toggle (436);
the sheave (403) includes a first outboard portion (458) and a second outboard portion (459) on either side of the pulley groove (456), the first outboard portion (458) or the second outboard portion (459) entering the interior of the recess (440) when the lever (436) reciprocates within the pulley groove (456).
8. The damper device of claim 1,
the dial (402) includes a first male detent arc (438-1) on a first side of the toggle lever (436), and the geneva gear wheel (403) includes a first female detent arc (457-1) on a first side of the geneva gear wheel slot (456);
when the flapper (300) is in the open position, the first male locking arc (438-1) extends into the first female locking arc (457-1), preventing the first female locking arc (457-1) from rotating past the first male locking arc (438-1), whereby the dial (402) prevents the sheave (403) from rotating.
9. The damper device of claim 8,
the dial (402) includes a second male detent arc (438-2) on a second, opposite side of the toggle lever (436), and the geneva gear wheel (403) includes a second female detent arc (457-2) on a second, opposite side of the geneva gear wheel slot (456);
when the flapper (300) is in the closed position, the second male locking arc (438-2) extends into the second female locking arc (457-2) preventing the second female locking arc (457-2) from rotating past the second male locking arc (438-2), whereby the dial (402) prevents the sheave (403) from rotating.
10. The damper device of claim 1,
the dial (402) comprises a first limiting surface (441) and a second limiting surface (442), when the first limiting surface (441) abuts against the first limiting part (421), the dial (402) is prevented from rotating along a first direction, when the second limiting surface (442) abuts against the second limiting part (422), the dial (402) is prevented from rotating along an opposite second direction, and the first limiting part (421) and the second limiting part (422) limit a rotating angle range beta of the dial (402).
11. The damper device according to claim 10, wherein the sheave (403) has an angular range of rotation α corresponding to the angular range of rotation of the flap (300) between the open position and the closed position, α, β having the following relationship:
beta is larger than or equal to k.alpha, and k is the transmission ratio between the driving plate (402) and the grooved wheel (403).
12. The damper device of claim 11,
the sheave (403) comprises a third limiting surface (460) and a fourth limiting surface (461), the sheave (403) is prevented from rotating in the second direction when the third limiting surface (460) abuts against the third limiting portion (423), the sheave (403) is prevented from rotating in the opposite first direction when the fourth limiting surface (461) abuts against the fourth limiting portion (424), and the third limiting portion (423) and the fourth limiting portion (424) define the rotation angle range alpha of the sheave (403).
13. The damper device according to any one of claims 10 to 12,
after the baffle (300) reaches the opening position, the grooved wheel (403) stops rotating along the second direction, the driving plate (402) idles for a certain angle along the first direction, and then the first limiting surface (441) abuts against the first limiting part (421) to prevent the driving plate (402) from rotating along the first direction; and/or
When the baffle (300) reaches the closed position, the rotation of the grooved wheel (403) along the first direction is stopped, the dial (402) idles for a certain angle along the second direction, and then the second limit surface (442) abuts against the second limit part (422) to prevent the dial (402) from rotating along the second direction.
14. The damper device of claim 12,
the first limiting part (421), the second limiting part (422), the third limiting part (423) and the fourth limiting part (424) are all arranged on the bottom plate part (102) of the frame (100) and extend out towards the substrate part (201) of the shell (200).
15. A refrigerator, comprising:
a storage chamber for storing the liquid to be stored,
a cold air passage for transferring cold air into the storage compartment,
the damper device according to any one of claims 1 to 14, an opening portion of the damper device being provided in the cold air passage, and a shutter of the damper device being capable of opening or closing the opening portion to thereby open or block the cold air passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020226050.2U CN211977334U (en) | 2020-02-28 | 2020-02-28 | Air door device for refrigerator and refrigerator with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020226050.2U CN211977334U (en) | 2020-02-28 | 2020-02-28 | Air door device for refrigerator and refrigerator with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211977334U true CN211977334U (en) | 2020-11-20 |
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ID=73376759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020226050.2U Active CN211977334U (en) | 2020-02-28 | 2020-02-28 | Air door device for refrigerator and refrigerator with same |
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| Country | Link |
|---|---|
| CN (1) | CN211977334U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021169708A1 (en) * | 2020-02-28 | 2021-09-02 | 江苏雷利电机股份有限公司 | Ventilation door device for refrigerator |
-
2020
- 2020-02-28 CN CN202020226050.2U patent/CN211977334U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021169708A1 (en) * | 2020-02-28 | 2021-09-02 | 江苏雷利电机股份有限公司 | Ventilation door device for refrigerator |
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