CN112252889B - Control method for opening and closing door device of refrigerator and refrigerator - Google Patents
Control method for opening and closing door device of refrigerator and refrigerator Download PDFInfo
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- CN112252889B CN112252889B CN201910662884.XA CN201910662884A CN112252889B CN 112252889 B CN112252889 B CN 112252889B CN 201910662884 A CN201910662884 A CN 201910662884A CN 112252889 B CN112252889 B CN 112252889B
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- 238000000034 method Methods 0.000 title claims abstract description 50
- 230000007246 mechanism Effects 0.000 claims abstract description 166
- 230000008602 contraction Effects 0.000 claims abstract description 22
- 230000005540 biological transmission Effects 0.000 claims description 31
- 230000003068 static effect Effects 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims 1
- 238000005057 refrigeration Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000003796 beauty Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F15/00—Power-operated mechanisms for wings
- E05F15/70—Power-operated mechanisms for wings with automatic actuation
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F15/00—Power-operated mechanisms for wings
- E05F15/60—Power-operated mechanisms for wings using electrical actuators
- E05F15/603—Power-operated mechanisms for wings using electrical actuators using rotary electromotors
- E05F15/611—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for swinging wings
- E05F15/614—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for swinging wings operated by meshing gear wheels, one of which being mounted at the wing pivot axis; operated by a motor acting directly on the wing pivot axis
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F15/00—Power-operated mechanisms for wings
- E05F15/60—Power-operated mechanisms for wings using electrical actuators
- E05F15/603—Power-operated mechanisms for wings using electrical actuators using rotary electromotors
- E05F15/611—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for swinging wings
- E05F15/616—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for swinging wings operated by push-pull mechanisms
- E05F15/619—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for swinging wings operated by push-pull mechanisms using flexible or rigid rack-and-pinion arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
- F25D23/02—Doors; Covers
- F25D23/028—Details
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2400/00—Electronic control; Electrical power; Power supply; Power or signal transmission; User interfaces
- E05Y2400/10—Electronic control
- E05Y2400/20—Electronic control of brakes, disengaging means, holders or stops
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2400/00—Electronic control; Electrical power; Power supply; Power or signal transmission; User interfaces
- E05Y2400/10—Electronic control
- E05Y2400/30—Electronic control of motors
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2400/00—Electronic control; Electrical power; Power supply; Power or signal transmission; User interfaces
- E05Y2400/80—User interfaces
- E05Y2400/85—User input means
- E05Y2400/852—Sensors
- E05Y2400/854—Switches
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2900/00—Application of doors, windows, wings or fittings thereof
- E05Y2900/30—Application of doors, windows, wings or fittings thereof for domestic appliances
- E05Y2900/31—Application of doors, windows, wings or fittings thereof for domestic appliances for refrigerators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2323/00—General constructional features not provided for in other groups of this subclass
- F25D2323/02—Details of doors or covers not otherwise covered
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Refrigerator Housings (AREA)
- Power-Operated Mechanisms For Wings (AREA)
Abstract
The invention discloses a control method for opening and closing a door device of a refrigerator and the refrigerator, relates to the technical field of refrigeration, and aims to provide a control method for automatically opening the door body by controlling an ejection mechanism in the door opening and closing device to move and then controlling a rotating mechanism to move when the door body is opened. The control method of the door opening and closing device of the refrigerator comprises the steps that when a door opening instruction is received, an output shaft of a driving motor is controlled to rotate along a first rotating direction, a clutch is controlled to be disconnected with a rotating mechanism, and an ejection mechanism moves from a contraction state to an extension state to eject a door body to a preset position; and controlling the clutch to be jointed with the rotating mechanism and controlling the output shaft of the driving motor to continue rotating along the first rotating direction so that the rotating mechanism drives the door body to rotate around the hinge shaft until the door body rotates to a completely opened state. The invention is used for improving the working performance of the refrigerator.
Description
Technical Field
The invention relates to the technical field of refrigeration, in particular to a control method for opening and closing a door device of a refrigerator and the refrigerator.
Background
Referring to fig. 1, the conventional door opening and closing device comprises a driving motor (not shown) connected with a control unit, a driving wheel 03 mounted on an output shaft of the driving motor, and a driven wheel 05 engaged with the driving wheel 03, wherein the driven wheel 05 is engaged with engaging teeth 06 arranged in the circumferential direction of a hinge shaft (used for rotatably connecting a door body 02 and a box body 01), a push rod 04 is arranged on the box body 01, and transmission teeth engaged with the driving wheel 03 are arranged on the push rod 04.
The specific process of opening the door body 02 is as follows: the control unit controls an output shaft of the driving motor to rotate along a first rotating direction, the driving wheel 03 is driven to rotate, the push rod 04 is further driven to move towards the door body 02, the door body 02 is pushed open, meanwhile, the driving wheel 03 also drives the driven wheel 05 to rotate along the opposite direction, the driven wheel 05 rotates under the action of the meshed teeth 06 acting on the hinged shaft, the door body 02 is driven to rotate around the hinged shaft, and finally the door body 02 is opened. The specific process of closing the door body 02 is as follows: the control unit controls the output shaft of the driving motor to rotate along a second rotating direction, so as to drive the driving wheel 03 to rotate, further drive the push rod 04 to move towards the direction away from the door body 02, meanwhile, the driving wheel 03 also drives the driven wheel 05 to rotate along the opposite direction, so as to drive the door body 02 to rotate around the hinge shaft, so as to close the door body 02, wherein the first rotating direction is opposite to the second rotating direction.
In the door opening and closing device shown in fig. 1, when the control unit controls the driving motor to rotate, the driving wheel 03 drives the push rod 04 to move, the driving wheel 03 also drives the driven wheel 04 to rotate, the rotated driven wheel 04 can generate torque to the meshed teeth on the hinged shaft, the door seal suction force between the door body 02 and the box body 01 is large, the door opening moment needs to apply large force on the door body 02, if the door opening moment is generated, the driving wheel 03 also drives the driven wheel 04 to rotate, so that the meshed teeth on the hinged shaft can apply large torque, the service life of the meshed teeth on the hinged shaft is influenced, the service life of the whole door opening and closing device is finally shortened, and the use performance of the refrigerator is influenced.
Disclosure of Invention
The embodiment of the invention provides a control method for opening and closing a door device of a refrigerator and the refrigerator, and mainly aims to provide the control method for automatically opening the door device by controlling an ejection mechanism in the door opening and closing device to move and then controlling a rotating mechanism to move when the door body is opened, so that the service life of the door opening and closing device is effectively prolonged.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
on one hand, the embodiment of the invention provides a control method of a door opening and closing device of a refrigerator, the refrigerator comprises a refrigerator body, a door body which is rotationally connected with the refrigerator body through a hinge shaft, and the door opening and closing device, the door opening and closing device comprises an ejection mechanism and a rotating mechanism which are driven by the same driving mechanism, and the driving mechanism comprises a driving motor; a clutch is arranged between the output end of the driving mechanism and the rotating mechanism; the control unit is respectively and electrically connected with the driving motor and the clutch, and the control method comprises the following steps:
when a door opening instruction is received, an output shaft of the driving motor is controlled to rotate along a first rotating direction, the clutch is controlled to be disconnected with the rotating mechanism, and the ejection mechanism is made to move from a contraction state to an extension state so as to eject the door body to a preset position;
the clutch is controlled to be connected with the rotating mechanism, and the output shaft of the driving motor is controlled to rotate along the first rotating direction, so that the rotating mechanism drives the door body to rotate around the hinge shaft until the door body rotates to a fully opened state.
According to the control method for opening and closing the door device of the refrigerator, provided by the embodiment of the invention, when the output shaft of the driving motor is controlled to rotate along the first rotating direction, the clutch is controlled to be disconnected with the rotating mechanism, so that when the ejection mechanism drives the door body to eject, the rotating mechanism is in a non-moving state, the rotating mechanism cannot be damaged due to larger torque when the door is just opened, and the working stability of the whole door opening and closing device can be further improved; after the door body is jacked to the preset position, the clutch is controlled to be connected with the rotating mechanism, so that the rotating mechanism drives the door body to rotate to a fully opened state, and the door body is automatically opened. Compared with the prior art, the control method of the door opening and closing device of the refrigerator can protect the rotating mechanism under the condition of effectively controlling the door body to be opened, so that the working performance of the whole door opening and closing device is effectively improved.
On the other hand, the embodiment of the invention also provides a refrigerator, which comprises a refrigerator body and a door body, wherein the refrigerator body is internally provided with a storage chamber, the door body is arranged at an opening of the storage chamber, the door body is rotatably connected with the refrigerator body through a hinge shaft, the refrigerator also comprises a door opening and closing device, and the door opening and closing device comprises:
the ejection mechanism and the rotating mechanism are driven by the same driving mechanism, and the driving mechanism comprises a driving motor; a clutch is arranged between the output end of the driving mechanism and the rotating mechanism; and the control unit is respectively electrically connected with the driving motor and the clutch and controls the opening and closing of the door body by adopting the control method for opening and closing the door device of the refrigerator provided by the embodiment.
According to the refrigerator provided by the embodiment of the invention, the control unit controls the door body to be opened and closed by adopting the control method for opening and closing the door device of the refrigerator provided by the embodiment, so that the refrigerator provided by the embodiment of the invention can solve the same technical problems and produce the same technical effects.
Drawings
Fig. 1 is a schematic structural view of a refrigerator having a door opening and closing apparatus according to the related art;
fig. 2 is an external perspective view of a refrigerator according to an embodiment of the present invention;
FIG. 3 is an enlarged view of FIG. 2 at A;
fig. 4 is a schematic structural diagram of a door opening and closing device according to an embodiment of the present invention;
FIG. 5 is an exploded view of FIG. 4;
fig. 6 is a schematic diagram illustrating a connection relationship between a driving mechanism and an ejection mechanism according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an ejection mechanism according to an embodiment of the present invention, in which a push rod is in a retracted position;
fig. 8 is a schematic structural view of a push rod in an extended position in an ejection mechanism according to an embodiment of the present invention;
fig. 9 is a schematic view illustrating a connection relationship between a driving mechanism, a clutch and a rotating mechanism according to an embodiment of the present invention;
FIG. 10 is a schematic view of a connection relationship between a connection shaft, a cam, a follower and a microswitch provided in the embodiment of the present invention;
fig. 11 is a schematic structural diagram of a guiding mechanism according to an embodiment of the present invention;
FIG. 12 is a schematic view of the operation of a cam, a follower and a microswitch according to an embodiment of the present invention;
FIG. 13 is a schematic view of the operation of a cam, a follower and a microswitch according to an embodiment of the present invention;
FIG. 14 is a schematic view of the operation of a cam, a follower and a microswitch according to an embodiment of the present invention;
fig. 15 is a flowchart illustrating a method for controlling an opening/closing door apparatus of a refrigerator according to an embodiment of the present invention;
fig. 16 is a flowchart illustrating a method for controlling an opening/closing door apparatus of a refrigerator according to an embodiment of the present invention;
fig. 17 is a block diagram of a control device for opening and closing a door device of a refrigerator according to an embodiment of the present invention.
Detailed Description
The following describes a control method for opening and closing a door device of a refrigerator and the refrigerator in detail according to an embodiment of the present invention with reference to the accompanying drawings.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
The embodiment of the invention provides a control method of an opening and closing door device of a refrigerator, referring to fig. 2 and 3, the refrigerator comprises a refrigerator body 1, a door body 2 which is rotationally connected with the refrigerator body 1 through a hinge shaft, and the opening and closing door device, referring to fig. 4 and 5, the opening and closing door device comprises an ejection mechanism 7 and a rotating mechanism 8 which are driven by the same driving mechanism 5, the driving mechanism 5 comprises a driving motor 501, and a clutch 9 is arranged between the output end of the driving mechanism 5 and the rotating mechanism 8; referring to fig. 15, the control unit electrically connected to the driving motor 501 and the clutch 9, respectively, controls the gate device to open and close the gate device, including:
step S11: when receiving a door opening instruction, the output shaft of the driving motor is controlled to rotate along the first rotating direction, and the clutch is controlled to be disconnected with the rotating mechanism, so that the ejection mechanism moves from a contraction state to an extension state, and the door body is ejected to a preset position.
When receiving a door opening instruction, the output shaft of the driving motor 501 is controlled to rotate along the first rotation direction to enable the ejection mechanism 7 to move towards the extension state, so as to eject the door body 2 to a preset position, and the clutch 9 is controlled to be disconnected from the rotation mechanism 8 in the process that the ejection mechanism 7 ejects the door body 2. That is to say, when the driving motor 501 drives the ejection mechanism 7 to move so as to destroy the door seal suction force and push the door body open, the clutch 9 is powered off and cannot drive the rotating mechanism 8 to move, and then the generated large torque cannot cause damage to the rotating mechanism 8, so that the rotating mechanism 8 is protected, the service life of the rotating mechanism 8 is prolonged, and the working stability of the whole door opening and closing device can be improved.
In some embodiments, the ejection mechanism 7 moves from a retracted state to an extended state to eject the door body to a preset position, and specifically includes: the ejection mechanism moves from a contraction state to an extension state so as to eject the door body until alpha is 8-15 degrees, and alpha is the rotation angle of the door body. Further, α may be 8 ° to 12 °, α may be 10 ° to 12 °.
When the output shaft of the driving motor 501 is controlled to rotate along the first rotation direction, so that the ejection mechanism 7 may be blocked from moving from the contraction state to the extension state, that is, the ejection mechanism 7 cannot smoothly move from the contraction state to the extension state, so that the actual current value output by the driving motor 501 may be greatly changed, and if the output shaft of the driving motor continues to rotate along the first rotation direction, the driving motor may be damaged.
In order to guarantee the working stability of the door opening and closing device, the control method of the door opening and closing device of the refrigerator provided by the embodiment of the invention further comprises the following steps: and controlling an output shaft of the driving motor to rotate along a first rotating direction, so that the ejection mechanism moves from a contraction state to an extension state in the process: and when the difference value between the actual current value output by the driving motor and the rated current value of the driving motor is larger than the preset current difference value range, controlling the output shaft of the driving motor to rotate along a second rotating direction so as to enable the ejection mechanism to move towards a contraction state, wherein the first rotating direction is opposite to the second rotating direction. The mode that the output shaft of the control driving motor rotates along the direction opposite to the first rotating direction is adopted to prevent the driving motor from being damaged, the output shaft of the control driving motor rotates along the second rotating direction, the ejection mechanism in the extension state can be recovered to the contraction state, if the mode that the output shaft of the control driving motor stops rotating is adopted, the ejection mechanism is required to be recovered to the contraction state manually by a user, the man-machine exchange experience degree is reduced, or the ejection mechanism is in the extension state, but the appearance attractiveness degree can be influenced.
It should be noted that: the second rotation direction according to the present invention is the opposite direction to the first rotation direction.
Step S12: the clutch is controlled to be connected with the rotating mechanism, and the output shaft of the driving motor is controlled to rotate along the first rotating direction, so that the rotating mechanism drives the door body to rotate around the hinge shaft until the door body rotates to a fully opened state.
After the door body is ejected to the preset position by the ejection mechanism, the clutch is controlled to be connected with the rotating mechanism, and meanwhile, the output shaft of the driving motor is controlled to continue to rotate along the first rotating direction, namely, the clutch is controlled to be electrified, the driving motor can drive the rotating mechanism to move through the clutch, and further drive the door body to rotate to a completely opened state, for example, when the door body rotates to the completely opened state, the rotating angle of the door body is 70-80 degrees.
When the control clutch is engaged with the rotating mechanism, the rotating mechanism drives the door body to rotate, and the movement of the rotating mechanism is possibly blocked, namely the rotating mechanism cannot smoothly drive the door body to rotate, so that the actual current value output by the driving motor is greatly changed, and if the output shaft of the driving motor continues to rotate along the first rotating direction at the moment, the driving motor can be damaged.
In order to guarantee the working stability of the door opening and closing device, the control method of the door opening and closing device of the refrigerator provided by the embodiment of the invention further comprises the following steps: controlling the clutch to be jointed with the rotating mechanism, and controlling the output shaft of the driving motor to continue rotating along the first rotating direction, so that the rotating mechanism drives the door body to rotate around the hinge shaft: and when the difference value between the actual current value output by the driving motor and the rated current value of the driving motor is larger than the preset current difference value range, controlling the output shaft of the driving motor to rotate along the second rotating direction, and controlling the clutch to be disconnected from the rotating mechanism so as to enable the ejection mechanism to move towards the contraction state and stop rotating the door body. The mode that the output shaft of the driving motor is controlled to rotate in the direction opposite to the first rotating direction is adopted to prevent the driving motor from being damaged, and the output shaft of the driving motor is controlled to rotate in the second rotating direction, so that the ejection mechanism in the extension state can be recovered to the contraction state, the rotating door body stops rotating, and the working performance of the whole door opening and closing device is effectively guaranteed.
In order to effectively control the closing of the door, referring to fig. 10 and 11, the refrigerator further includes a cam transmission mechanism 12 and a microswitch 13, wherein the cam transmission mechanism 12 includes: the cam 121, the follower 122 and the guide structure 123 are in transmission connection with the rotating mechanism, and referring to fig. 12 to 14, a cam surface 1211 and a base circular surface 1212 are formed on the outer edge of the cam 121; the follower 122 is located between the cam 121 and the microswitch 13; the guide structure 123 serves to guide the follower 122 to move between the cam 121 and the microswitch 13. The rotating mechanism 8 provided by the embodiment of the invention drives the door body 2 to rotate around the hinge shaft until the door body 2 rotates to a completely opened state, and specifically comprises the following steps: when the base circular surface 1212 is opposite to the driven member 122, the driven member 122 is static and does not press down a contact of the micro switch 13, the micro switch 13 outputs a signal that the door body is in an opening process, and the output shaft of the driving motor 501 is controlled to continue to rotate along the first rotation direction according to the signal that the door body is in the opening process; when the cam surface 1211 is engaged with the follower 122, the cam 121 drives the follower 122 to move towards the micro switch direction 13, the follower 122 presses down a contact of the micro switch 13, the micro switch 13 outputs a signal that the door body is in a fully opened state, the output shaft of the driving motor 501 is controlled to rotate along the second rotation direction according to the signal that the door body is in the fully opened state, and the clutch 9 is controlled to be disconnected from the rotation mechanism 8. That is to say, when micro-gap switch 13 output door body is in the signal of opening the process, control driving motor 501 continues to rotate along first direction of rotation, until micro-gap switch 13 output door body is in the signal of open state completely, can control driving motor 501's output shaft and rotate along second direction of rotation to control clutch 9 and rotary mechanism 8 disconnection, the benefit of design like this is: the rotation direction of the driving motor is controlled by the signal output by the microswitch 13, so that the phenomenon that the door body in a completely opened state continues to rotate and is further damaged is prevented.
In some embodiments, referring to fig. 12, the follower 122 has a mounting groove 1221, the cam 121 is rotatably mounted in the mounting groove 1221, a convex hull 1222 is formed on a wall surface of the mounting groove 1221, the follower 122 is driven to move toward the microswitch 13 when the cam surface 1211 is engaged with the convex hull 1222, and the follower 122 is stationary when the base circular surface 1212 is engaged with the convex hull 1222. The follower 122 is sleeved on the cam 121, so that the working stability of the cam and the follower can be guaranteed.
In some embodiments, referring to fig. 11, the guiding structure 123 includes a guiding groove 1232 and a guiding post 1231 engaged with the guiding groove 1232, the extending direction of the guiding groove 1232 is parallel to the moving direction of the follower 122, one of the guiding groove 1232 and the guiding post 1231 is disposed on the follower 122, and the other is disposed on the base plate 111; for example, referring to fig. 11, the guide post 1231 is provided on the base plate 111, and the guide groove 1232 is opened on the follower 122. The guide structure formed by the guide groove 1232 and the guide post 1231 is simple in structure and convenient to implement.
Referring to fig. 15, the door further includes, after rotating to the fully opened state:
step S13: and controlling an output shaft of the driving motor to rotate along the second rotating direction, and controlling the clutch to be disconnected with the rotating mechanism so as to enable the ejection mechanism to move from the extension state to the contraction state.
Specifically, after the door body rotates to the complete opening state, the clutch and the rotating mechanism are controlled to be disconnected, so that the door body is stably in the opening state, the output shaft of the driving motor is controlled to rotate along the second rotating direction, the ejection mechanism in the extension state is enabled to be recovered to the contraction state, and therefore when the door body is prevented from being in the opening state, the ejection mechanism is extended and exposed, the appearance attractiveness of the refrigerator is affected, and the phenomenon of experience degree is reduced.
In order to realize the automatic closing of the door body, referring to fig. 16, the method for controlling the door opening and closing device of the refrigerator according to the embodiment of the present invention further includes:
step 21: when a door closing instruction is received, the clutch is controlled to be connected with the rotating mechanism, and the output shaft of the driving motor is controlled to rotate along the second rotating direction, so that the rotating mechanism drives the door body to rotate around the hinge shaft until the door body rotates to a completely closed state.
That is to say, when receiving the instruction of closing the door, control driving motor's output shaft and rotate along the second direction of rotation to control clutch and rotary mechanism joint, the clutch circular telegram promptly, driving motor drives rotary mechanism through the clutch and moves, in order to drive the door body and rotate around the articulated shaft, finally realizes the self-closing of the door body.
When the control clutch is engaged with the rotating mechanism, the rotating mechanism drives the door body to rotate, and the movement of the rotating mechanism is possibly blocked, that is, the rotating mechanism cannot smoothly drive the door body to rotate, so that the actual current value output by the driving motor is greatly changed, and if the output shaft of the driving motor continues to rotate along the second rotating direction at the moment, the driving motor can be damaged.
In order to ensure the working stability of the door opening and closing device, the clutch is controlled to be connected with the rotating mechanism, and the output shaft of the driving motor is controlled to rotate along the second rotating direction, so that the rotating mechanism drives the door body to rotate around the hinge shaft: when the difference value between the actual current value output by the driving motor and the rated current value of the driving motor is larger than the preset current difference value range, the output shaft of the driving motor is controlled to stop rotating, and the clutch is controlled to be disconnected from the rotating mechanism, so that the door body stops rotating. The output shaft of the driving motor is controlled to stop rotating, and the clutch is controlled to be disconnected from the rotating mechanism, so that the phenomenon that the driving motor is damaged is avoided.
When the switch door gear still includes cam drive mechanism and micro-gap switch, rotary mechanism drives the door body and rotates, until the door body rotates to the complete closure state, specifically includes: when the base circular surface 1212 is opposite to the driven member 122, the driven member 122 is static and does not press down the contact of the micro switch 13, the micro switch 13 outputs a signal that the door body is in the closing process, and the output shaft of the driving motor 501 is controlled to continue to rotate in the second rotation direction according to the signal that the door body is in the closing process; when the cam surface 1211 is engaged with the follower 122, the cam 121 drives the follower 122 to move toward the microswitch 13, the follower 122 presses down the contact of the microswitch 13, the microswitch 13 outputs a signal that the door body is in a completely closed state, the output shaft of the driving motor 501 is controlled to stop rotating according to the signal that the door body is in the completely closed state, and the clutch 9 is controlled to be disconnected from the rotating mechanism 8. That is to say, when the micro-switch 13 outputs a signal that the door body is in the closing process, the driving motor 501 is controlled to continue to rotate along the second rotation direction until the micro-switch 13 outputs a signal that the door body is in the completely closed state, that is, the output shaft of the driving motor 501 can be controlled to stop rotating, and the clutch 9 is controlled to be disconnected from the rotating mechanism 8, so that the design has the advantages that: the rotation direction of the driving motor is controlled by the signal output by the microswitch 13, so that the phenomenon that the door body in a completely closed state continues to rotate and is further damaged is prevented.
On the other hand, an embodiment of the present invention further provides a refrigerator, referring to fig. 2 and 3, including a refrigerator body 1 having a storage chamber formed therein, and a door body 2 disposed at an opening of the storage chamber, the door body 2 being rotatably connected to the refrigerator body 1 by a hinge shaft, and further including a door opening and closing device, referring to fig. 4 and 5, the door opening and closing device including: the ejection mechanism 7 and the rotating mechanism 8 are driven by the same driving mechanism 5, and the driving mechanism 5 comprises a driving motor 501; a clutch 9 is arranged between the output end of the driving mechanism 5 and the rotating mechanism 8; referring to fig. 17, the control unit 16 is electrically connected to the driving motor 501 and the clutch 9, and the control unit 16 controls the opening and closing of the door body by using the method for controlling the door opening and closing device of the refrigerator according to the embodiment.
In some other embodiments, referring to fig. 17, the gate opening and closing device further includes a current detection unit 14 and a processing unit 15 electrically connected to the control unit 16, the current detection unit 14 is configured to detect an actual current value output by the driving motor 501, and the processing unit 15 is configured to determine a difference between the actual current value and a rated current value according to the actual current value output by the driving motor and the rated current value of the driving motor, and determine whether the difference is within a preset current difference range.
Referring to fig. 3, an extension portion extending beyond the top of the case 1 is formed at the top of the door 2, a mounting cavity 201 is formed in the extension portion, and the door opening and closing device is disposed in the mounting cavity 201. In the field, the hinge plate 3 is generally installed on the top of the refrigerator body 1, in order to prevent the hinge plate 3 from being obviously viewed when the refrigerator is viewed from the front side of the refrigerator, the top of the door body 2 is higher than the top of the refrigerator body 1, so that an extending part for shielding the hinge plate 3 is formed above a door seal of the door body 2, and the hinge plate 3 is shielded by the extending part, thereby improving the appearance attractiveness of the refrigerator.
According to the door opening and closing device provided by the embodiment of the invention, the extension part of the existing door body 2, which is higher than the top of the refrigerator body 1, is fully utilized, and the door opening and closing device is arranged in the installation cavity 201 formed in the extension part, so that the arrangement position of the door opening and closing device is more hidden, and the extension part is positioned above the door seal of the door body, therefore, the refrigerator provided by the embodiment of the invention has the advantages that the sealing effect between the door body 2 and the refrigerator body 1 is ensured, and the door opening and closing device is exposed to the outside on the premise that the refrigerator has an automatic door opening and closing function, and the appearance attractiveness of the refrigerator is further optimized.
Referring to fig. 3, the output shaft of the driving motor 501 is parallel to the width direction L1 of the door body 2, the driving mechanism 5 further includes a driving wheel 502, the driving wheel 502 is mounted on the output shaft of the driving motor 501 and is in transmission connection with the ejection mechanism 7, and the input end of the clutch 9 is connected with the driving wheel 502. That is, the driving motor 501 is horizontally disposed in the installation cavity 201, so that a large space in the width direction of the door body 2 is also fully utilized.
In order to realize automatic opening and closing of the door body with ease and increase output torque, referring to fig. 4, the driving mechanism 5 according to the embodiment of the present invention further includes a transmission 503, the transmission 503 is mounted on the output shaft of the driving motor 501, the transmission 503 is configured to increase torque of the output shaft of the driving motor 501, and an output end of the transmission 503 is connected to the driving wheel 502.
In some embodiments, referring to fig. 5 and 6, the ejection mechanism 7 comprises: the driven wheel 701 is meshed with the driving wheel 502, the push rod 702 is arranged on the mounting seat 6 and can slide between a contraction position and an extension position, referring to fig. 3, the sliding direction of the push rod 702 is parallel to the thickness direction L2 of the door body 2, and the push rod 702 is provided with a transmission gear which is arranged along the extension direction and is meshed with the driven wheel 701. When the door body 2 needs to be opened, the driven wheel 701 is driven by the driving wheel 502, and the push rod 702 is driven to move towards the direction of the box body 1 along the thickness direction of the door body 2, and when the end of the push rod 702 abuts against the box body 1, thrust is generated on the box body 1, of course, due to the reaction force, the box body 1 can generate thrust with equal acting force and opposite direction on the door body 2, and under the reaction force of the box body 1 on the push rod 702, the door body 2 is pushed open.
Because the push rod 702 is also disposed in the installation cavity 201, in order to facilitate the push rod 702 to apply thrust to the box body 1, referring to fig. 3, an avoiding hole 202 for the push rod 702 to extend out is formed on a side wall of the door body 2 close to the box body 1. When the door body 2 needs to be opened, the push rod 702 extends out of the avoiding hole 202, and when the door body 2 is closed, the push rod 702 contracts into the installation cavity 201 along the avoiding hole 202, so that the appearance attractiveness of the whole refrigerator is guaranteed.
In order to make the whole door opening and closing device more compact, referring to fig. 5, the mounting seat 6 includes a first mounting portion 601 and a second mounting portion 602 which are vertically arranged, the driving motor 501, the driving pulley 502, the transmission 503 and the driven pulley 701 may be mounted on the first mounting portion 601, and the push rod 702 may be slidably mounted on the second mounting portion 602. Therefore, the installation position is provided for the driving mechanism and the ejection mechanism through the installation seat 6, so that the structure of the whole door opening and closing device is centralized as much as possible, and the occupied space is reduced.
In order to prevent the driving teeth on the push rod 702 from disengaging from the upper engaging teeth of the follower 701 during the sliding process of the push rod 702, so as to cause discontinuous transmission, the door opening and closing device provided by the invention further comprises a stopping structure, referring to fig. 7 and 8, the driving teeth of the push rod 702 located at the two ends of the push rod 702 are a first end driving tooth 7021 and a second end driving tooth 7022, the first end driving tooth 7021 is close to the box body, and the second end driving tooth 7022 is far from the box body. Referring to fig. 8, the blocking structure is used to engage the second end gear 7022 with the driven wheel 701 when the push rod 702 is slid to the extended position, and referring to fig. 7, the blocking structure is used to engage the first end gear 7021 with the driven wheel 701 when the push rod 702 is slid to the retracted position.
Referring to fig. 7, when the driven wheel 701 rotates clockwise to drive the push rod 702 to slide to the retracted position, if the first end driving gear 7021 is not engaged with the driven wheel 701, when the driven wheel 701 rotates counterclockwise again and it is necessary to drive the push rod 702 to slide to the extended position, since the driving gear on the push rod 702 is already disengaged from the driven wheel 701, it is difficult to drive the push rod 702 to slide to the extended position again. Referring to fig. 8, when the driven wheel 701 rotates counterclockwise to drive the push rod 702 to slide to the extended position, if the second end driving gear 7022 is not engaged with the driven wheel 701, when the driven wheel 701 rotates clockwise again and the push rod 702 needs to be driven to slide toward the retracted position, since the driving gear on the push rod 702 is already disengaged from the driven wheel 701, it is difficult to drive the push rod 702 to slide toward the retracted position again. The push rod 702 can be guaranteed to be meshed with the driven wheel 701 in real time through the stopping structure, and therefore meshing transmission continuity of the driven wheel 701 and the push rod 702 is guaranteed.
In some embodiments, referring to fig. 7 and 8, the preventing structure includes: one end of the elastic member 703 is connected with the mounting seat 6, the other end of the elastic member 703 is connected with one end of the push rod 702 far away from the box body, and the connection position of the elastic member 703 and the mounting seat 6 is between a contraction position and an extension position. The specific working principle of the stopping structure is as follows: referring to fig. 7, when the push rod 701 slides to the retracted position, the elastic member 703 may apply a pulling force F1 to the push rod 702, so that the push rod 702 has a tendency to move toward the extended position, and the first end driving gear 7021 is engaged with the driven wheel 701; referring to fig. 8, when the push rod 701 slides to the extended position, the elastic member 703 may apply a pulling force F2 to the push rod 702, so that the push rod 702 has a tendency to move toward the retracted position, and the second end driving gear 7022 is engaged with the driven wheel 701.
The elastic member 703 may have various implementations, such as a spring, a spring plate, etc., and the specific structure of the elastic member 703 is not limited herein, and any structure is within the scope of the present invention.
Referring to fig. 5 and 9, the rotation mechanism 8 includes: the worm 801 is in transmission connection with the output end of the clutch 9, the worm wheel 802 is meshed with the worm 801, and the rotation axis of the worm wheel 802 is parallel to the height direction L3 (refer to FIG. 3) of the door body 1; the first transmission wheel 803 is connected with the turbine 802 through a connecting shaft 804 and can synchronously rotate with the turbine 802, and a second transmission wheel 805 is meshed with the first transmission wheel 803; the hinge shaft 4 has engaging teeth 401 provided along its circumferential direction and engaged with the second driving wheel 805 (alternatively, a driving wheel engaged with the second driving wheel 805 may be fixed to the hinge shaft). When the driving wheel 502 drives the worm 801 to rotate, the worm wheel 802 is driven to rotate, the rotating worm wheel 802 drives the first driving wheel 803 to rotate synchronously through the connecting shaft 804, the first driving wheel 803 drives the second driving wheel 805 to rotate in the opposite direction, the rotating second driving wheel 805 transmits the acting force to the meshing teeth 401, but since the meshing teeth 401 are formed on the hinge shaft 4, the meshing teeth 401 apply a reaction force to the second driving wheel 805 to drive the door body 2 to rotate around the hinge shaft 4.
In some embodiments, the cam 12 may be mounted on the connecting shaft 804.
In specific implementation, in general, the engaging teeth 401 are made of metal, the second transmission teeth 805 are made of polymer material, and in order to prevent the reaction force applied to the second transmission wheels 805 by the engaging teeth 401 from damaging the second transmission wheels 805 and further affecting the performance of the entire door opening and closing device, referring to fig. 9, the rotating mechanism 8 further includes a third transmission wheel 806, the third transmission wheel 806 is made of metal, the third transmission wheel 806 is connected to the second transmission wheels 805 through a connecting shaft, and the third transmission wheel 806 is engaged with the engaging teeth 401.
In order to improve the appearance beauty of the whole door opening and closing device, referring to fig. 4 and 5, the door opening and closing device further comprises an installation box 11, wherein the installation box 11 comprises a bottom plate 111 and a cover body 112 which are buckled with each other, and the rotating mechanisms 8 are all installed in an installation cavity formed by buckling the bottom plate 111 and the cover body 112. The bottom plate 111 and the cover 112 are detachably connected, which also facilitates subsequent maintenance of the rotating mechanism 8.
In order to tightly close the door body 2, referring to fig. 5, the refrigerator provided by the embodiment of the invention further comprises an absorption assisting mechanism 10, and the absorption assisting mechanism is matched with the door seal and acts together to tightly close the door body 2 and improve the fresh-keeping performance of the refrigerator. The suction assisting mechanism 10 comprises a suction assisting device 102 and a pull rod 101, and in the process of closing the door body, the suction assisting device 102 provides assistance for the pull rod 101 so as to close the door body 2.
In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (11)
1. A control method of a door opening and closing device of a refrigerator comprises a refrigerator body, a door body and the door opening and closing device, wherein the door body is rotationally connected with the refrigerator body through a hinge shaft; a clutch is arranged between the output end of the driving mechanism and the rotating mechanism; a control unit electrically connected to the driving motor and the clutch, respectively, the control method including:
when a door opening instruction is received, an output shaft of the driving motor is controlled to rotate along a first rotating direction, the clutch is controlled to be disconnected with the rotating mechanism, and the ejection mechanism is made to move from a contraction state to an extension state so as to eject the door body to a preset position;
controlling the clutch to be jointed with the rotating mechanism and controlling an output shaft of the driving motor to rotate along the first rotating direction, so that the rotating mechanism drives the door body to rotate around the hinge shaft until the door body rotates to a fully opened state;
the door body still includes after rotating to the complete open mode:
controlling an output shaft of the driving motor to rotate along a second rotating direction, and controlling the clutch to be disconnected from the rotating mechanism so as to enable the ejection mechanism to move from the extension state to the contraction state, wherein the first rotating direction is opposite to the second rotating direction;
the control method further comprises the following steps:
when a door closing instruction is received, the clutch is controlled to be connected with the rotating mechanism, and the output shaft of the driving motor is controlled to rotate along the second rotating direction, so that the rotating mechanism drives the door body to rotate around the hinge shaft until the door body rotates to a completely closed state;
the door opening and closing device further comprises a cam transmission mechanism and a microswitch, wherein the cam transmission mechanism comprises: the cam is in transmission connection with the rotating mechanism, and a cam surface and a base circle surface are formed on the outer edge of the cam; a follower located between the cam and the microswitch; a guide structure for guiding the follower to move between the cam and the microswitch; it is characterized in that the preparation method is characterized in that,
the rotary mechanism drives the door body to rotate around the hinge shaft until the door body rotates to a completely opened state, and the door body opening mechanism specifically comprises:
when the base circular surface is opposite to the driven piece, the driven piece is static and does not press down a contact of the micro switch, the micro switch outputs a signal that the door body is in an opening process, and an output shaft of the driving motor is controlled to continue to rotate along the first rotating direction according to the signal that the door body is in the opening process;
when the cam surface is matched with the driven piece, the cam drives the driven piece to move towards the direction of the microswitch, the driven piece presses down a contact of the microswitch, the microswitch outputs a signal that the door body is in a fully opened state, and according to the signal that the door body is in the fully opened state, the output shaft of the driving motor is controlled to rotate along the second rotating direction and the clutch is controlled to be disconnected with the rotating mechanism.
2. The method of controlling the door opening and closing apparatus for a refrigerator according to claim 1, wherein the output shaft of the driving motor is controlled to rotate in the first rotational direction, and in the process of moving the eject mechanism from the retracted state to the extended state:
when the difference value between the actual current value output by the driving motor and the rated current value of the driving motor is larger than a preset current difference value range, controlling the output shaft of the driving motor to rotate along a second rotating direction so as to enable the ejection mechanism to move towards the contraction state, wherein the first rotating direction is opposite to the second rotating direction.
3. The method for controlling the door opening and closing device of the refrigerator according to claim 1, wherein the clutch is controlled to be engaged with the rotating mechanism, and the output shaft of the driving motor is controlled to continue to rotate in the first rotating direction, so that the rotating mechanism drives the door body to rotate around the hinge shaft during the process that:
when the difference value between the actual current value output by the driving motor and the rated current value of the driving motor is larger than the preset current difference value range, the clutch is controlled to be disconnected with the rotating mechanism, the output shaft of the driving motor is controlled to rotate along a second rotating direction, so that the ejection mechanism moves towards the contraction state and the door body stops rotating, and the first rotating direction is opposite to the second rotating direction.
4. The method for controlling the door opening and closing device of the refrigerator according to claim 1, wherein the clutch is controlled to be engaged with the rotating mechanism, and the output shaft of the driving motor is controlled to rotate in the second rotating direction, so that in the process that the rotating mechanism drives the door body to rotate around the hinge shaft:
when the difference value between the actual current value output by the driving motor and the rated current value of the driving motor is larger than the preset current difference value range, controlling the output shaft of the driving motor to stop rotating, and controlling the clutch to be disconnected with the rotating mechanism so as to stop rotating the door body.
5. The method for controlling the door opening and closing device of the refrigerator according to claim 1, wherein the rotating mechanism drives the door body to rotate until the door body rotates to a completely closed state, specifically comprising:
when the base circular surface is opposite to the driven part, the driven part is static and does not press down a contact of the micro switch, the micro switch outputs a signal that the door body is in a closing process, and the output shaft of the driving motor is controlled to continue to rotate along the second rotating direction according to the signal that the door body is in the closing process;
when the cam surface is matched with the driven piece, the cam drives the driven piece to move towards the direction of the micro switch, the driven piece presses down a contact of the micro switch, the micro switch outputs a signal that the door body is in a completely closed state, the output shaft of the driving motor is controlled to stop rotating according to the signal that the door body is in the completely closed state, and the clutch is controlled to be disconnected with the rotating mechanism.
6. The method for controlling the door opening and closing device of the refrigerator according to claim 1, wherein the eject mechanism moves from the retracted state to the extended state to eject the door of the refrigerator to a predetermined position, specifically comprising:
the ejection mechanism moves from the contraction state to the extension state so as to eject the door body to an angle alpha of 8-15 degrees, wherein the angle alpha is the rotation angle of the door body.
7. The utility model provides a refrigerator, includes that inside is formed with the box of storeroom and sets up the door body at the opening part of storeroom, the door body pass through the articulated shaft with the box is rotated and is connected, its characterized in that still includes the switch door gear, the switch door gear includes:
the ejection mechanism and the rotating mechanism are driven by the same driving mechanism, and the driving mechanism comprises a driving motor; a clutch is arranged between the output end of the driving mechanism and the rotating mechanism; and a control unit electrically connected to the driving motor and the clutch, respectively, and controlling opening and closing of the door body by using the method for controlling the door opening and closing device of the refrigerator according to any one of claims 1 to 6.
8. The refrigerator according to claim 7, further comprising a current detection unit for detecting an actual current value output from the driving motor and a processing unit electrically connected to the control unit, wherein the processing unit is configured to determine a difference between the actual current value and a rated current value of the driving motor based on the actual current value output from the driving motor and the rated current value of the driving motor, and determine whether the difference is within a preset current difference range.
9. The refrigerator according to claim 7, wherein the driving mechanism, the ejection mechanism and the rotating mechanism are all mounted on the door body, an output shaft of the driving motor is parallel to the width direction of the door body, the driving mechanism further comprises a driving wheel mounted on the output shaft of the driving motor, the driving wheel is in transmission connection with the ejection mechanism, and an input end of the clutch is connected with the driving wheel.
10. The refrigerator according to claim 9, wherein the ejection mechanism comprises:
the driven wheel is meshed with the driving wheel;
the push rod is arranged on the mounting seat and can slide between a contraction state and an extension state, the sliding direction of the push rod is parallel to the thickness direction of the door body, and the push rod is provided with transmission teeth which are arranged along the extension direction of the push rod and are meshed with the driven wheel.
11. The refrigerator according to claim 9, wherein the rotation mechanism comprises:
the worm is in transmission connection with the output end of the clutch;
the worm wheel is meshed with the worm, and the rotation axis of the worm wheel is parallel to the height direction of the door body;
the first driving wheel is connected with the turbine through a connecting shaft and can synchronously rotate with the turbine, and when the door opening and closing device further comprises a cam driving mechanism and a microswitch, the cam is arranged on the connecting shaft;
the articulated shaft is provided with meshing teeth which are arranged along the circumferential direction of the articulated shaft and meshed with the second driving wheel.
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| CN201910662884.XA CN112252889B (en) | 2019-07-22 | 2019-07-22 | Control method for opening and closing door device of refrigerator and refrigerator |
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| CN201910662884.XA CN112252889B (en) | 2019-07-22 | 2019-07-22 | Control method for opening and closing door device of refrigerator and refrigerator |
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| CN114000794A (en) * | 2021-10-28 | 2022-02-01 | 裕克施乐塑料制品（太仓）有限公司 | Mixing actuator with ejection and rotation functions and refrigerator |
| CN116147273A (en) * | 2022-12-20 | 2023-05-23 | 珠海格力电器股份有限公司 | Automatic door opening and closing control method and device for refrigerator and refrigerator |
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