Door opening device and control method thereof, and refrigerator

Abstract

The present invention provides a door opening device, a control method thereof, and a refrigerator. The door opening device includes: an ejection mechanism, the ejection mechanism is arranged on a box body, and the first end of the ejection mechanism is abutted and matched with the door body of the box body; a rotating mechanism; and a driving mechanism. The door opening device, the control method thereof, and the refrigerator provided by the present invention use a driving mechanism to simultaneously drive the ejection mechanism to eject the door body and drive the rotating mechanism to rotate, which effectively overcomes the problem of complex structure caused by the need to separately set a pusher and a rotator in the prior art, effectively improves the utilization rate of the device and reduces the cost of the door opening device. At the same time, the clutch mechanism is provided so that the door body does not rotate when being ejected, thereby avoiding the problem that the rotating mechanism directly drives the door body to rotate and causes damage to the rotating mechanism, thereby ensuring the reliable operation of the door opening device.

Description

Technical Field

[0001] The invention relates to the technical field of refrigeration equipment, in particular to a door opening device and a control method thereof, and a refrigerator. Background Art

[0002] Traditional refrigerators generally use manual door opening and closing. When opening the door of a manual door refrigerator, the door body and the cabinet body must be separated to overcome the suction force between the door body and the cabinet door seal, so a large force is required to open the door. However, excessive force can easily cause items on the bottle frame of the door body to fall over, and may also cause accidental injury to children. At the same time, when closing the door manually, excessive force may cause items on the bottle frame to fall over, or your hands may be pinched. In addition, when both hands are occupied, you can no longer open or close the door.

[0003] With the development of the refrigerator industry, the intelligent and humanized design of refrigerators has brought convenience to consumers' lives and has become increasingly popular among consumers, especially automatic door opening and closing refrigerators. However, most automatic door opening and closing refrigerators require pushing the door body and the cabinet body first, and then rotating the door body to open the door. A separate pusher is required to push the door body open and a rotator is required to realize automatic door opening and closing. The pusher and the rotator need to be independently provided with power components and transmission structures inside, resulting in a complex refrigerator structure. Summary of the invention

[0004] In order to solve the technical problem that the prior art requires separate propellers and rotators, which results in a complicated refrigerator structure, a door opening device and a control method thereof, and a refrigerator are provided in which a driving mechanism simultaneously drives an ejection mechanism and a rotation mechanism to realize automatic door opening and closing.

[0005] A door opening device, comprising:

[0006] An ejection mechanism, wherein the ejection mechanism is disposed on the box body, and a first end of the ejection mechanism is in abutment with a door of the box body;

[0007] A rotating mechanism, wherein the rotating mechanism is arranged on the box body, and the door body is connected to the rotating mechanism;

[0008] The driving mechanism is arranged on the box body, the driving mechanism is connected with the ejection mechanism, and the driving mechanism is connected with the rotating mechanism through a clutch mechanism.

[0009] The driving mechanism comprises a push rod and a sleeve, wherein the push rod is movably arranged in the sleeve, the sleeve is movably arranged on the box body, the sleeve is connected to the ejection mechanism, and the push rod is connected to the clutch mechanism.

[0010] The door opening device also includes a first limiting structure and a second limiting structure. The first limiting structure and the second limiting structure can be movably arranged on the box body, and the first limiting structure cooperates with the push rod to limit the position, and the second limiting structure cooperates with the sleeve to limit the position.

[0011] The door opening device also includes a connecting rod, which is rotatably arranged on the box body, the first limiting structure is arranged at one end of the connecting rod, and the second limiting structure is arranged at the other end of the connecting rod.

[0012] The door opening device further comprises a position-limiting driving structure, which is arranged on the box body and can drive the first position-limiting structure to move or drive the second position-limiting structure to move.

[0013] The push rod is provided with a first groove, and the first limiting structure is engaged with the first groove by snapping; and / or the sleeve is provided with a second groove, and the second limiting structure is engaged with the second groove by snapping.

[0014] The door opening device also includes a third position-limiting member and a fourth position-limiting member, both of which are arranged on the box body, and the sleeve can move freely between the third position-limiting member and the fourth position-limiting member.

[0015] The fourth limit member is provided with a limit switch, and the limit switch is electrically connected to the clutch mechanism, the first limit structure, and the second limit structure.

[0016] The driving mechanism further comprises a hydraulic supply mechanism, which is communicated with the sleeve and can drive the push rod to retract into or protrude out of the sleeve.

[0017] The clutch mechanism includes a driving gear, a driven gear and a connecting piece. The driving gear and the driven gear are both rotatably arranged on the box body. A first transmission rack is arranged on the push rod. The driving gear is meshed with the first transmission rack. The driven gear is in transmission cooperation with the rotating mechanism. The connecting piece is movably arranged on the box body, and the driving gear can drive the driven gear through the connecting piece.

[0018] The driving gear is provided with a first engaging hole, the driven gear is provided with a second engaging hole, the connecting member is movably provided at the first engaging hole and the second engaging hole, and when the clutch mechanism is in an engaged state, the connecting member is engaged with the first engaging hole and the second engaging hole at the same time.

[0019] The clutch mechanism comprises a clutch driving mechanism, and the clutch driving mechanism is arranged on the box body, and the clutch driving mechanism can drive the connecting member to move.

[0020] The clutch driving mechanism comprises an electromagnet, which is arranged on one side of the connecting member. The connecting member can move under the action of the magnetic force generated by the electromagnet.

[0021] A first rotating meshing gear is arranged on the rotating shaft of the door body, and the first rotating meshing gear is in transmission cooperation with the driven gear.

[0022] The door opening device also includes a first transmission rod, on which a first meshing tooth and a second meshing tooth are provided, the first meshing tooth meshes with the driven gear, and the second meshing tooth meshes with the first rotating meshing gear.

[0023] The door opening device further includes a first displacement detection mechanism, which can obtain the displacement of the first transmission rod, and the first displacement detection mechanism is electrically connected to the clutch mechanism and / or the driving mechanism.

[0024] The push rod is provided with a second displacement detection mechanism, which can obtain the displacement of the push rod, and the second displacement detection mechanism is electrically connected to the clutch mechanism and / or the driving mechanism.

[0025] The ejection mechanism includes an ejector rod and a crank drive structure, wherein the crank drive structure is arranged on the box body and is transmission-connected to the drive mechanism, the ejector rod is connected to the crank drive structure, and the ejector rod can protrude from or retract into the box body.

[0026] The crank drive structure includes a crank gear and a crank connecting rod. The crank gear is rotatably arranged on the box body. A second transmission rack is arranged on the sleeve. The crank gear is meshed with the second transmission rack. One end of the crank connecting rod is connected to the crank gear, and the other end is connected to the push rod.

[0027] A refrigerator comprises the door opening device mentioned above.

[0028] A control method for the door opening device as described above,

[0029] Acquire a control signal, wherein the control signal includes at least a door opening instruction and a door closing instruction;

[0030] The working states of the driving mechanism and the clutch mechanism are controlled according to the control signal.

[0031] The driving mechanism includes a push rod and a sleeve, the push rod is movably arranged in the sleeve, the sleeve is movably arranged on the box body, and the sleeve is connected to the ejection mechanism, the push rod is connected to the clutch mechanism, the door opening device also includes a first limiting structure and a second limiting structure, the first limiting structure and the second limiting structure are both movably arranged on the box body, and the first limiting structure is limited by the push rod, and the second limiting structure is limited by the sleeve, the door opening device also includes a third limiting member and a fourth limiting member, the third limiting member and the fourth limiting member are both arranged on the box body, and the sleeve can move freely between the third limiting member and the fourth limiting member, a limit switch is arranged on the fourth limiting member, and the limit switch is electrically connected to the clutch mechanism, the first limiting structure, and the second limiting structure, in controlling the door opening device to automatically open the door according to the control signal, it also includes:

[0032] When a door opening instruction is obtained, the push rod is controlled to extend out of the sleeve, the first limiting structure is controlled to cooperate with the push rod, the second limiting structure is controlled to disengage from the sleeve, and the clutch mechanism is controlled to switch to a disengaged state;

[0033] When a signal that the sleeve triggers the limit switch is obtained, the push rod is controlled to retract into the sleeve, the first limit structure is controlled to disengage from the push rod, the second limit structure is controlled to disengage from the sleeve, and the clutch mechanism is controlled to switch to an engaged state.

[0034] The driving mechanism includes a push rod and a sleeve, the push rod is movably arranged in the sleeve, the sleeve is movably arranged on the box body, and the sleeve is connected to the ejection mechanism, the push rod is connected to the clutch mechanism, the door opening device also includes a first limiting structure and a second limiting structure, the first limiting structure and the second limiting structure are both movably arranged on the box body, and the first limiting structure is limited by the push rod, and the second limiting structure is limited by the sleeve, the door opening device also includes a third limiting member and a fourth limiting member, the third limiting member and the fourth limiting member are both arranged on the box body, and the sleeve can move freely between the third limiting member and the fourth limiting member, and in controlling the door opening device to automatically close the door according to the control signal, it also includes:

[0035] When a door closing instruction is obtained, the push rod is controlled to extend out of the sleeve, the second limiting structure is controlled to cooperate with the sleeve in a limiting manner, the first limiting structure is controlled to disengage from the push rod, and the clutch mechanism is controlled to switch to a coupled state.

[0036] The method further comprises:

[0037] Determine whether the user turns the door;

[0038] If so, the driving mechanism and the clutch mechanism are closed.

[0039] In determining whether the user rotates the door body, the method further includes:

[0040] Get the rotation speed of the door body;

[0041] If the rotation speed of the door body is outside the preset range, it is determined that the user rotates the door body.

[0042] The clutch mechanism includes a driving gear, a driven gear and a connecting member, the driving gear and the driven gear are both rotatably arranged on the box body, the push rod is provided with a first transmission rack, the driving gear is meshed with the first transmission rack, the driven gear is matched with the rotation mechanism, the connecting member is movably arranged on the box body, and the driving gear can drive the driven gear through the connecting member, the door opening device also includes a first transmission rod, the first transmission rod is provided with a first meshing tooth and a second meshing tooth, the first meshing tooth is meshed with the driven gear, and the second meshing tooth is meshed with the first rotating meshing gear, the door opening device also includes a first displacement detection mechanism, the first displacement detection mechanism can obtain the displacement of the first transmission rod, and the first displacement detection mechanism is electrically connected to the clutch mechanism and / or the driving mechanism, in obtaining the rotation rate of the door body, it also includes:

[0043] The displacement rate of the first transmission rod is acquired, and the rotation rate of the door body is obtained according to the displacement rate of the first transmission rod.

[0044] If yes, after closing the driving mechanism and the clutch mechanism, the method further includes:

[0045] After the driving mechanism and the clutch mechanism are closed for a first set period of time, the door body is controlled to rotate again.

[0046] In controlling the door body rotation again, it also includes:

[0047] Obtaining the displacement direction of the first transmission rod;

[0048] The rotation direction of the door body is determined according to the displacement direction of the first transmission rod.

[0049] The clutch mechanism includes a driving gear, a driven gear and a connecting piece, the driving gear and the driven gear are both rotatably arranged on the box body, the push rod is provided with a first transmission rack, the driving gear is meshed with the first transmission rack, the driven gear is transmission-matched with the rotating mechanism, the connecting piece is movably arranged on the box body, and the driving gear can drive the driven gear through the connecting piece, the driving gear is provided with a first clamping hole, the driven gear is provided with a second clamping hole, the connecting piece is movably arranged at the first clamping hole and the second clamping hole, when the clutch mechanism is in an engaged state, the connecting piece is clamped and matched with the first clamping hole and the second clamping hole at the same time, after judging whether the user rotates the door body, it also includes:

[0050] If so, the driving gear is controlled to rotate so that the first engaging hole can engage with the connecting member.

[0051] The method also includes: when the door body rotates to the maximum opening, if the door body is not closed within a second preset time period, controlling the door body to close.

[0052] The door opening device and control method thereof, and the refrigerator provided by the present invention utilize a driving mechanism to simultaneously drive an ejection mechanism to eject the door body and drive a rotating mechanism to rotate, thereby effectively overcoming the problem of complex structure caused by the need to separately set a pusher and a rotator in the prior art, effectively improving the utilization rate of components and reducing the cost of the door opening device. At the same time, a clutch mechanism is provided to prevent the door body from being rotated when the door body is ejected, thereby avoiding the problem of damage to the rotating mechanism caused by the rotating mechanism directly driving the door body to rotate, thereby ensuring the reliable operation of the door opening device. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 A schematic diagram of the structure of a door opening device provided in an embodiment of the present invention;

[0054] Figure 2 Another schematic diagram of the structure of the door opening device provided by an embodiment of the present invention;

[0055] Figure 3 Another schematic diagram of the structure of the door opening device provided by an embodiment of the present invention;

[0056] Figure 4 Another schematic diagram of the structure of the door opening device provided by an embodiment of the present invention;

[0057] Figure 5 A schematic diagram of the structure of a clutch mechanism provided in an embodiment of the present invention;

[0058] Figure 6 A schematic diagram of the structure of a refrigerator provided by an embodiment of the present invention;

[0059] In the figure:

[0060] 1. Box body; 2. Door body; 31. Push rod; 32. Sleeve; 41. First limit structure; 42. Second limit structure; 43. Connecting rod; 44. Limit driving structure; 45. Third limit member; 46. Fourth limit member; 51. Driving gear; 52. Driven gear; 53. Connecting member; 54. Clutch driving mechanism; 21. First rotating meshing gear; 55. First transmission rod; 56. First displacement detection mechanism; 33. Second displacement detection mechanism; 61. Push rod; 62. Crank gear; 63. Crank connecting rod. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0062] like Figures 1 to 6 The door opening device shown includes: an ejection mechanism, which is arranged on the box body 1, and the first end of the ejection mechanism is in abutment with the door body 2 of the box body 1; a rotating mechanism, which is arranged on the box body 1, and the door body 2 is connected to the rotating mechanism; a driving mechanism, which is arranged on the box body 1, and the driving mechanism is connected to the ejection mechanism, and the driving mechanism and the rotating mechanism are connected through a clutch mechanism. The driving mechanism is used to simultaneously drive the ejection mechanism to eject the door body 2 and drive the rotating mechanism to rotate, which effectively overcomes the problem of complex structure caused by the need to separately set the pusher and the rotator in the prior art, effectively improves the utilization rate of the device and reduces the cost of the door opening device. At the same time, the clutch mechanism can be set to prevent the door body 2 from rotating when the door body 2 is ejected, avoiding the problem that the rotating mechanism directly drives the door body 2 to rotate and causes damage to the rotating mechanism, thereby ensuring the reliable operation of the door opening device.

[0063] When the door body 2 is automatically opened, the clutch mechanism is first controlled to switch to the disengaged state. At this time, the driving mechanism can only drive the ejection mechanism to work, and eject the door body 2 from the box body 1, so that the door body 2 is free from the restriction of the box body 1, and then the clutch mechanism is switched to the engaged state. At this time, the driving mechanism can drive the rotating mechanism to rotate, thereby continuing to drive the door body 2 to rotate, and the purpose of automatic door opening is achieved.

[0064] When the door body 2 is automatically closed, the clutch mechanism switches to the engaged state. At this time, the driving mechanism moves in the reverse direction, thereby driving the door body 2 to rotate in the reverse direction, so that the door body 2 gradually engages with the box body 1 and is captured by the box body 1 when the box body 1 is about to be closed, thereby finally closing the door body 2.

[0065] As an embodiment, the driving mechanism includes a push rod 31 and a sleeve 32, wherein the push rod 31 is movably disposed in the sleeve 32, the sleeve 32 is movably disposed on the box body 1, and the sleeve 32 is connected to the ejection mechanism, and the push rod 31 is connected to the clutch mechanism. The push rod 31 is retracted into or protruded from the sleeve 32, so that the distance between the end of the push rod 31 away from the sleeve 32 and the end of the sleeve 32 away from the push rod 31 changes, and the distance change can be used to drive the ejection mechanism to eject, and the rotation mechanism to rotate.

[0066] The door opening device also includes a first limiting structure 41 and a second limiting structure 42. The first limiting structure 41 and the second limiting structure 42 can be movably arranged on the box body 1, and the first limiting structure 41 is limitedly matched with the push rod 31, and the second limiting structure 42 is limitedly matched with the sleeve 32. When the first limiting structure 41 limits the push rod 31, when the push rod 31 and the sleeve 32 have relative movement, the push rod 31 cannot move relative to the box body 1, so that the sleeve 32 moves relative to the box body 1, and the driving mechanism produces a dimensional change in the first direction. Since the sleeve 32 is transmission-connected with the ejection mechanism, the ejection mechanism is actuated to push the door body 2 away from the box body 1. When the second limiting structure 42 limits the sleeve 32, when the push rod 31 and the sleeve 32 have relative movement, the sleeve 32 cannot move relative to the box body 1, so that the push rod 31 moves relative to the box body 1, and the driving mechanism produces a dimensional change in the second direction. Since the push rod 31 is connected to the clutch mechanism, when the clutch mechanism is in an engaged state, the push rod 31 can drive the rotating mechanism to rotate, thereby realizing the rotation of the door body 2.

[0067] The door opening device further comprises a connecting rod 43, which is rotatably arranged on the box body 1, wherein the first limiting structure 41 is arranged at one end of the connecting rod 43, and the second limiting structure 42 is arranged at the other end of the connecting rod 43. The rotation axis of the connecting rod 43 is located in the middle of the connecting rod 43, and the connecting rod 43 is used to ensure that when the first limiting structure 41 is in limiting cooperation with the push rod 31, the second limiting structure 42 is separated from the sleeve 32, and when the second limiting structure 42 is in limiting cooperation with the sleeve 32, the first limiting structure 41 is separated from the push rod 31, thereby ensuring the reliable operation of the driving mechanism.

[0068] The door opening device further includes a limit driving structure 44, which is disposed on the box body 1 and can drive the first limit structure 41 to move or drive the second limit structure 42 to move. The limit driving structure 44 drives the first limit structure 41 to move so as to achieve the limit fit and disengagement between the first limit structure 41 and the push rod 31, and drives the second limit structure 42 to move so as to achieve the limit fit and disengagement between the second limit structure 42 and the sleeve 32.

[0069] The push rod 31 is provided with a first groove, and the first limiting structure 41 is engaged with the first groove.

[0070] The sleeve 32 is provided with a second groove, and the second limiting structure 42 is engaged with the second groove.

[0071] like Figure 1 As shown, the limit driving structure 44 is an electromagnet, which can attract the second limit structure 42, so that the second limit structure 42 is stuck in the second groove, realizing the clamping connection between the second limit structure 42 and the sleeve 32. At this time, the first limit structure 41 will be separated from the first groove under the action of the connecting rod 43, and when the electromagnet stops attracting the second limit structure 42, the spring arranged near the first limit structure 41 will pull the connecting rod 43, so that the second limit structure 42 is disengaged from the second groove, and at the same time, the first limit structure 41 is moved toward the inside of the first groove, realizing the clamping fit between the first limit structure 41 and the first groove.

[0072] The door opening device further includes a third stopper 45 and a fourth stopper 46, both of which are arranged on the box body 1, and the sleeve 32 can move freely between the third stopper 45 and the fourth stopper 46. The third stopper 45 and the fourth stopper 46 are used to limit the movement range of the sleeve 32. When the sleeve 32 abuts against the third stopper 45 or the fourth stopper 46, the sleeve 32 cannot move further. At this time, only the push rod 31 can move, so that the rotation mechanism can be driven, and then the door body 2 can be driven to rotate.

[0073] The fourth limiter 46 is provided with a limit switch, and the limit switch is electrically connected to the clutch mechanism, the first limiter structure 41, and the second limiter structure 42. When the sleeve 32 triggers the limit switch, the limit switch can send a corresponding signal, which can control the clutch mechanism to switch to an engaged state, and at the same time control the first limiter structure 41 to disengage from the first groove. At this time, the sleeve 32 abuts against the fourth limiter 46, and when the push rod 31 continues to extend out of the sleeve 32, the push rod 31 can only continue to move, thereby driving the door body 2 to rotate.

[0074] The driving mechanism further includes a hydraulic supply mechanism, which is connected to the sleeve 32 and can drive the push rod 31 to retract into or protrude out of the sleeve 32. Using hydraulic pressure as a power device effectively reduces operating noise and improves user experience.

[0075] The clutch mechanism includes a driving gear 51, a driven gear 52 and a connecting member 53. Both the driving gear 51 and the driven gear 52 are rotatably arranged on the housing 1. The push rod 31 is provided with a first transmission rack. The driving gear 51 is meshed with the first transmission rack. The driven gear 52 is in transmission cooperation with the rotating mechanism. The connecting member 53 is movably arranged on the housing 1, and the driving gear 51 can drive the driven gear 52 through the connecting member 53. During the movement of the push rod 31, the driving gear 51 can be rotated through the first transmission rack. When the connecting member 53 connects the driving gear 51 and the driven gear 52, the driving gear 51 can drive the driven gear 52 to rotate, and the driven gear 52 can drive the door body 2 to rotate through the rotating mechanism. When the connecting member 53 is disengaged from the driving gear 51 or the connecting member 53 is disengaged from the driven gear 52, the driving gear 51 rotates independently.

[0076] The driving gear 51 is provided with a first engaging hole, the driven gear 52 is provided with a second engaging hole, the connecting member 53 is movably provided at the first engaging hole and the second engaging hole, and when the clutch mechanism is in an engaged state, the connecting member 53 is engaged with the first engaging hole and the second engaging hole at the same time.

[0077] like Figure 5 As shown, the driving gear 51 and the driven gear 52 are coaxially arranged, and the first clamping hole is located at the axis of the driving gear 51, and the second clamping hole is located at the axis of the driven gear 52. The first clamping hole and the second clamping hole are connected along the axis direction of the driving gear 51, and the connecting member 53 can move along the axis direction of the driving gear 51. The connecting member 53 can be partially located in the first clamping hole and the remaining part can be located in the second clamping hole to achieve the connection between the driving gear 51 and the driven gear 52, or it can be completely located in the first clamping hole or completely located in the second clamping hole to achieve the separation of the driving gear 51 and the driven gear 52.

[0078] The clutch mechanism includes a clutch driving mechanism 54 . The clutch driving mechanism 54 is disposed on the box body 1 , and the clutch driving mechanism 54 can drive the connecting member 53 to move.

[0079] The clutch driving mechanism 54 includes an electromagnet, which is disposed on one side of the connecting member 53 . The connecting member 53 can move under the action of the magnetic force generated by the electromagnet.

[0080] A first rotating meshing gear 21 is disposed on the rotating shaft of the door body 2 , and the first rotating meshing gear 21 is in transmission cooperation with the driven gear 52 .

[0081] The door opening device further comprises a first transmission rod 55 , on which a first meshing tooth and a second meshing tooth are provided. The first meshing tooth meshes with the driven gear 52 , and the second meshing tooth meshes with the first rotating meshing gear 21 .

[0082] The door opening device also includes a first displacement detection mechanism 56, which can obtain the displacement of the first transmission rod 55, and the first displacement detection mechanism 56 is electrically connected to the clutch mechanism and / or the drive mechanism. The displacement of the first transmission rod 55 is obtained by the first displacement detection mechanism 56, so that the rotation angle of the door body 2 and the rotation direction of the door body 2 can be obtained, and it is also possible to determine whether the user rotates the door body 2 by judging the displacement change rate of the first transmission rod 55. When the user rotates the door body 2, the clutch mechanism and the drive mechanism are powered off. At this time, the driving gear 51 and the driven gear 52 are disengaged, and the rotation of the door body 2 will not drive the drive mechanism to move, thereby ensuring the reliable movement of the door body 2 and preventing the door opening device from being damaged by external forces.

[0083] The push rod 31 is provided with a second displacement detection mechanism 33, which can obtain the displacement of the push rod 31, and the second displacement detection mechanism 33 is electrically connected to the clutch mechanism and / or the driving mechanism. The displacement of the push rod 31 is determined by the second displacement detection mechanism 33. When the user rotates the door body 2, the driven gear 52 rotates with the rotation of the door body 2. At this time, the connecting member 53 cannot cooperate with the driving gear 51. Therefore, it is necessary to control the driving gear 51 to rotate so that the connecting member 53 can cooperate with the driving gear 51 under the action of the clutch driving mechanism 54. At this time, the push rod 31 can be controlled to move, and the rotation angle of the driving gear 51 can be determined when the second displacement detection mechanism 33 obtains the displacement of the push rod 31. When the driving gear 51 rotates to a position where it can cooperate with the connecting member 53, the clutch driving mechanism 54 is activated to make the connecting member 53 cooperate with the driving gear 51, thereby driving the door body 2 to rotate accordingly.

[0084] The ejection mechanism includes an ejector rod 61 and a crank drive structure, wherein the crank drive structure is disposed on the housing 1 and is in transmission connection with the drive mechanism, and the ejector rod 61 is connected to the crank drive structure, and the ejector rod 61 can protrude or retract into the housing 1. The crank drive structure is used to change the direction of the linear movement of the sleeve 32, and when the ejector rod 61 moves to the maximum value in the direction of the door body 2, the continued movement of the sleeve 32 will drive the ejector rod 61 to move in a direction away from the door body 2, thereby retracting the ejector rod 61, and preventing the ejector rod 61 from always protruding and causing harm to the user.

[0085] The crank driving structure includes a crank gear 62 and a crank connecting rod 63. The crank gear 62 is rotatably arranged on the housing 1. The sleeve 32 is provided with a second transmission rack. The crank gear 62 is meshed with the second transmission rack. One end of the crank connecting rod 63 is connected to the crank gear 62, and the other end is connected to the push rod 61. The meshing of the second transmission rack and the crank gear 62 converts the linear motion of the sleeve 32 into a circular motion, and the crank connecting rod 63 converts the circular motion into the reciprocating motion of the push rod 61, so that the push rod 61 can be ejected and retracted by the linear motion in a single direction of the sleeve 32.

[0086] Since it is inconvenient to arrange the second transmission rack on the sleeve 32 , an additional sleeve extension rod is arranged on the sleeve 32 , and the second transmission rack is arranged on the sleeve extension rod to ensure that the structure of the sleeve 32 is reliable.

[0087] like Figures 1 to 4 As shown, Figure 1 is the initial state of the door opening device. At this time, the door body 2 is in the closed state. At this time, the first limiting structure 41 is engaged in the first groove, and the second limiting structure 42 is separated from the second groove. When the door needs to be opened, the door opening device will switch to Figure 2The push rod 61 is in a fully ejected state. During this process, since the first limiting structure 41 is engaged with the first groove, when the push rod 31 extends out of the sleeve 32, the sleeve 32 is forced to move toward the fourth limiting member 46. At the same time, the second transmission rack is meshed with the crank gear 62, so that the push rod 61 is ejected. At this time, the sleeve 32 abuts against the fourth limiting member 46 and cannot move further. Then the first limiting structure 41 is disengaged from the first groove, and the push rod 31 is retracted into the sleeve 32. Since the push rod 31 and the sleeve 32 are not limited, the push rod 31 is 1 and the sleeve 32 can move relative to the box body 1, the first transmission rack meshes with the driving gear 51, the clutch drive mechanism 54 drives the connecting member 53 to move, so that the driving gear 51 and the driven gear 52 are connected, the driven gear 52 rotates, the driven gear 52 meshes with the first meshing teeth, the first transmission rod 55 is displaced, and the second meshing teeth mesh with the first rotating gear, thereby driving the door body 2 to rotate and open, and at the same time, the movement of the sleeve 32 drives the crank gear 62 to rotate, thereby driving the push rod 61 to retract, and switching to the state as shown in FIG. Figure 3 As the push rod 31 continues to move, the door body 2 gradually opens to the maximum opening, and the second limiting structure 42 is inserted into the second groove. At this time, the top rod 61 is completely retracted. Figure 4 shown.

[0088] When you need to close the door, Figure 4 In this state, the push rod 31 extends out of the sleeve 32. Since the sleeve 32 is limited by the second limiting structure 42, the push rod 31 can only move relative to the box body 1. The first transmission rack drives the active gear 51 to rotate in the reverse direction, and the driven gear 52 also rotates in the reverse direction, so that the door body 2 rotates in the reverse direction to achieve the closing of the door body 2.

[0089] A refrigerator comprises the door opening device mentioned above.

[0090] A control method for the door opening device as described above comprises:

[0091] Acquire a control signal, wherein the control signal includes at least a door opening instruction and a door closing instruction;

[0092] The working states of the driving mechanism and the clutch mechanism are controlled according to the control signal.

[0093] The driving mechanism includes a push rod 31 and a sleeve 32, wherein the push rod 31 is movably arranged in the sleeve 32, wherein the sleeve 32 is movably arranged on the box body 1, and wherein the sleeve 32 is connected to the ejection mechanism, and the push rod 31 is connected to the clutch mechanism, wherein the door opening device also includes a first limiting structure 41 and a second limiting structure 42, wherein the first limiting structure 41 and the second limiting structure 42 are both movably arranged on the box body 1, wherein the first limiting structure 41 is limitedly matched with the push rod 31, and the second limiting structure 42 is limitedly matched with the push rod 31. 2 cooperates with the sleeve 32 in limiting position, the door opening device also includes a third limiting member 45 and a fourth limiting member 46, the third limiting member 45 and the fourth limiting member 46 are both arranged on the box body 1, and the sleeve 32 can move freely between the third limiting member 45 and the fourth limiting member 46, and the fourth limiting member 46 is provided with a limit switch, and the limit switch is electrically connected to the clutch mechanism, the first limiting structure 41, and the second limiting structure 42. In controlling the door opening device to automatically open the door according to the control signal, it also includes:

[0094] When the door opening instruction is obtained, the push rod 31 is controlled to extend out of the sleeve 32, the first limiting structure 41 is controlled to limit and cooperate with the push rod 31, the second limiting structure 42 is controlled to disengage from the sleeve 32, and the clutch mechanism is controlled to switch to a disengaged state;

[0095] When the signal that the sleeve 32 triggers the limit switch is obtained, the push rod 31 is controlled to retract into the sleeve 32, the first limit structure 41 is controlled to disengage from the push rod 31, the second limit structure 42 is controlled to disengage from the sleeve 32, and the clutch mechanism is controlled to switch to the engaged state.

[0096] The driving mechanism includes a push rod 31 and a sleeve 32, wherein the push rod 31 is movably arranged in the sleeve 32, the sleeve 32 is movably arranged on the box body 1, and the sleeve 32 is connected to the ejection mechanism, the push rod 31 is connected to the clutch mechanism, the door opening device also includes a first limiting structure 41 and a second limiting structure 42, the first limiting structure 41 and the second limiting structure 42 are both movably arranged on the box body 1, and the first limiting structure 41 is limited by the push rod 31, and the second limiting structure 42 is limited by the sleeve 32, the door opening device also includes a third limiting member 45 and a fourth limiting member 46, the third limiting member 45 and the fourth limiting member 46 are both arranged on the box body 1, and the sleeve 32 can move freely between the third limiting member 45 and the fourth limiting member 46, and in controlling the door opening device to automatically close the door according to the control signal, it also includes:

[0097] When a door closing instruction is obtained, the push rod 31 is controlled to extend out of the sleeve 32, the second limiting structure 42 is controlled to limit and cooperate with the sleeve 32, the first limiting structure 41 is controlled to disengage from the push rod 31, and the clutch mechanism is controlled to switch to a coupled state.

[0098] The method further comprises:

[0099] Determine whether the user rotates door body 2;

[0100] If so, the driving mechanism and the clutch mechanism are closed, that is, the automatic opening or closing of the door body 2 is interrupted.

[0101] In determining whether the user rotates the door body 2, the following steps are also included:

[0102] Obtain the rotation rate of door body 2;

[0103] If the rotation speed of the door body 2 is outside the preset range, it is determined that the user rotates the door body 2 .

[0104] The clutch mechanism includes a driving gear 51, a driven gear 52 and a connecting member 53, the driving gear 51 and the driven gear 52 are both rotatably arranged on the box body 1, the push rod 31 is provided with a first transmission rack, the driving gear 51 is meshed with the first transmission rack, the driven gear 52 is in transmission cooperation with the rotating mechanism, the connecting member 53 is movably arranged on the box body 1, and the driving gear 51 can drive the driven gear 52 through the connecting member 53, the door opening device also includes a first transmission rod 55, the first transmission rod 55 is provided with a first meshing tooth and a second meshing tooth, the first meshing tooth is meshed with the driven gear 52, and the second meshing tooth is meshed with the first rotating meshing gear 21, the door opening device also includes a first displacement detection mechanism 56, the first displacement detection mechanism 56 can obtain the displacement of the first transmission rod 55, and the first displacement detection mechanism 56 is electrically connected to the clutch mechanism and / or the driving mechanism, in obtaining the rotation rate of the door body 2, it also includes:

[0105] The displacement rate of the first transmission rod 55 is acquired, and the rotation rate of the door body 2 is obtained according to the displacement rate of the first transmission rod 55 .

[0106] If yes, after closing the driving mechanism and the clutch mechanism, the method further includes:

[0107] After the driving mechanism and the clutch mechanism are closed for a first set period of time, the door body 2 is controlled to rotate again, that is, the interrupted door opening and closing action is performed.

[0108] The value range of the first set time period is 10s to 60s, preferably 30s.

[0109] In controlling the door body 2 to rotate again, it also includes:

[0110] Obtaining the displacement direction of the first transmission rod 55;

[0111] The rotation direction of the door body 2 is determined according to the displacement direction of the first transmission rod 55, and then the door body 2 is driven to rotate continuously according to the rotation direction of the door body 2, thereby realizing the automatic power continuation function.

[0112] The clutch mechanism includes a driving gear 51, a driven gear 52 and a connecting member 53. The driving gear 51 and the driven gear 52 are both rotatably arranged on the box body 1. The push rod 31 is provided with a first transmission rack. The driving gear 51 is meshed with the first transmission rack. The driven gear 52 is in transmission cooperation with the rotating mechanism. The connecting member 53 is movably arranged on the box body 1, and the driving gear 51 can drive the driven gear 52 through the connecting member 53. The driving gear 51 is provided with a first clamping hole, and the driven gear 52 is provided with a second clamping hole. The connecting member 53 is movably arranged at the first clamping hole and the second clamping hole. When the clutch mechanism is in an engaged state, the connecting member 53 is clamped and cooperated with the first clamping hole and the second clamping hole at the same time. After judging whether the user rotates the door body 2, it also includes:

[0113] If so, the driving gear 51 is controlled to rotate so that the first engaging hole can engage with the connecting member 53 .

[0114] It also includes: when the door body 2 rotates to the maximum opening, if the door body 2 is not closed within a second preset time period, indicating that the user forgets to close the door at this time, the door body 2 is controlled to close.

[0115] The second preset time ranges from 1 minute to 10 minutes, preferably 3 minutes.

[0116] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A door opening device, characterized in that: include: An ejection mechanism, the ejection mechanism being arranged on the box body (1), and a first end of the ejection mechanism being in abutment with a door body (2) of the box body (1); A rotating mechanism, the rotating mechanism being arranged on the box body (1), and the door body (2) being connected to the rotating mechanism; A driving mechanism, the driving mechanism being arranged on the box body (1), the driving mechanism being connected to the ejection mechanism, and the driving mechanism being connected to the rotating mechanism via a clutch mechanism; The driving mechanism comprises a push rod (31) and a sleeve (32), wherein the push rod (31) is movably arranged in the sleeve (32), the sleeve (32) is movably arranged on the box body (1), the sleeve (32) is connected to the ejection mechanism, and the push rod (31) is connected to the clutch mechanism.

2. The door opening device according to claim 1, characterized in that: The door opening device further comprises a first limiting structure (41) and a second limiting structure (42), wherein the first limiting structure (41) and the second limiting structure (42) are both movably arranged on the box body (1), and the first limiting structure (41) is in limiting cooperation with the push rod (31), and the second limiting structure (42) is in limiting cooperation with the sleeve (32).

3. The door opening device according to claim 2, characterized in that: The door opening device also includes a connecting rod (43), which is rotatably arranged on the box body (1), the first limiting structure (41) is arranged at one end of the connecting rod (43), and the second limiting structure (42) is arranged at the other end of the connecting rod (43).

4. The door opening device according to claim 3, characterized in that: The door opening device also includes a limit drive structure (44), which is arranged on the box body (1), and the limit drive structure (44) can drive the first limit structure (41) to move or drive the second limit structure (42) to move.

5. The door opening device according to claim 3, characterized in that: The push rod (31) is provided with a first groove, and the first limiting structure (41) is snap-fitted with the first groove; and / or the sleeve (32) is provided with a second groove, and the second limiting structure (42) is snap-fitted with the second groove.

6. The door opening device according to claim 2, characterized in that: The door opening device further comprises a third position-limiting member (45) and a fourth position-limiting member (46), wherein the third position-limiting member (45) and the fourth position-limiting member (46) are both arranged on the box body (1), and the sleeve (32) can move freely between the third position-limiting member (45) and the fourth position-limiting member (46).

7. The door opening device according to claim 6, characterized in that: The fourth limit member (46) is provided with a limit switch, and the limit switch is electrically connected to the clutch mechanism, the first limit structure (41), and the second limit structure (42).

8. The door opening device according to claim 1, characterized in that: The driving mechanism further comprises a hydraulic supply mechanism, which is in communication with the sleeve (32) and can drive the push rod (31) to retract into or protrude from the sleeve (32).

9. The door opening device according to claim 1, characterized in that: The clutch mechanism comprises a driving gear (51), a driven gear (52) and a connecting member (53); the driving gear (51) and the driven gear (52) are both rotatably arranged on the housing (1); a first transmission rack is arranged on the push rod (31); the driving gear (51) is meshed with the first transmission rack; the driven gear (52) is in transmission cooperation with the rotating mechanism; the connecting member (53) is movably arranged on the housing (1); and the driving gear (51) can drive the driven gear (52) through the connecting member (53).

10. The door opening device according to claim 9, characterized in that: The driving gear (51) is provided with a first engaging hole, the driven gear (52) is provided with a second engaging hole, the connecting member (53) is movably provided at the first engaging hole and the second engaging hole, and when the clutch mechanism is in an engaged state, the connecting member (53) is engaged with the first engaging hole and the second engaging hole at the same time.

11. The door opening device according to claim 9, characterized in that: The clutch mechanism comprises a clutch drive mechanism (54), the clutch drive mechanism (54) is arranged on the box body (1), and the clutch drive mechanism (54) can drive the connecting member (53) to move.

12. The door opening device according to claim 11, characterized in that: The clutch drive mechanism (54) comprises an electromagnet, which is arranged on one side of the connecting member (53). The connecting member (53) can move under the action of the magnetic force generated by the electromagnet.

13. The door opening device according to claim 9, characterized in that: A first rotating meshing gear (21) is arranged on the rotating shaft of the door body (2), and the first rotating meshing gear (21) is in transmission cooperation with the driven gear (52).

14. The door opening device according to claim 13, characterized in that: The door opening device also includes a first transmission rod (55), on which a first meshing tooth and a second meshing tooth are provided, wherein the first meshing tooth meshes with the driven gear (52), and the second meshing tooth meshes with the first rotating meshing gear (21).

15. The door opening device according to claim 14, characterized in that: The door opening device further comprises a first displacement detection mechanism (56), wherein the first displacement detection mechanism (56) is capable of acquiring the displacement of the first transmission rod (55), and the first displacement detection mechanism (56) is electrically connected to the clutch mechanism and / or the driving mechanism.

16. The door opening device according to claim 1, characterized in that: The push rod (31) is provided with a second displacement detection mechanism (33), the second displacement detection mechanism (33) can obtain the displacement of the push rod (31), and the second displacement detection mechanism (33) is electrically connected to the clutch mechanism and / or the driving mechanism.

17. The door opening device according to claim 1, characterized in that: The ejection mechanism comprises a push rod (61) and a crank drive structure, wherein the crank drive structure is arranged on the box body (1) and is transmission-connected to the drive mechanism, the push rod (61) is connected to the crank drive structure, and the push rod (61) can protrude from or retract into the box body (1).

18. The door opening device according to claim 17, characterized in that: The crank drive structure comprises a crank gear (62) and a crank connecting rod (63); the crank gear (62) is rotatably arranged on the housing (1); a second transmission rack is arranged on the sleeve (32); the crank gear (62) is meshed with the second transmission rack; one end of the crank connecting rod (63) is connected to the crank gear (62) and the other end is connected to the push rod (61).

19. A refrigerator, characterized in that: A door opening device comprising the door opening device described in any one of claims 1 to 18.

20. A method for controlling a door opening device according to any one of claims 1 to 18, characterized in that: include: Acquire a control signal, wherein the control signal includes at least a door opening instruction and a door closing instruction; The working states of the driving mechanism and the clutch mechanism are controlled according to the control signal.

21. The method according to claim 20, characterized in that: The driving mechanism comprises a push rod (31) and a sleeve (32), wherein the push rod (31) is movably arranged in the sleeve (32), wherein the sleeve (32) is movably arranged on the box body (1), and wherein the sleeve (32) is connected to the ejection mechanism, and wherein the push rod (31) is connected to the clutch mechanism. The door opening device further comprises a first limiting structure (41) and a second limiting structure (42), wherein both the first limiting structure (41) and the second limiting structure (42) are movably arranged on the box body (1), and wherein the first limiting structure (41) is limitedly matched with the push rod (31), and wherein the second limiting structure (42) is limitedly matched with the push rod (31). The clutch mechanism (41) and the first limiting structure (42) are limitedly matched with the sleeve (32), the door opening device further comprises a third limiting member (45) and a fourth limiting member (46), the third limiting member (45) and the fourth limiting member (46) are both arranged on the box body (1), and the sleeve (32) can move freely between the third limiting member (45) and the fourth limiting member (46), the fourth limiting member (46) is provided with a limit switch, the limit switch is electrically connected to the clutch mechanism, the first limiting structure (41) and the second limiting structure (42), and in controlling the door opening device to automatically open the door according to the control signal, the door opening device further comprises: When a door opening instruction is obtained, the push rod (31) is controlled to extend out of the sleeve (32), the first limiting structure (41) is controlled to cooperate with the push rod (31) in a limiting manner, the second limiting structure (42) is controlled to disengage from the sleeve (32), and the clutch mechanism is controlled to switch to a separated state; When a signal is obtained that the sleeve (32) triggers the limit switch, the push rod (31) is controlled to retract into the sleeve (32), the first limit structure (41) is controlled to disengage from the push rod (31), the second limit structure (42) is controlled to disengage from the sleeve (32), and the clutch mechanism is controlled to switch to an engaged state.

22. The method according to claim 20, characterized in that: The driving mechanism comprises a push rod (31) and a sleeve (32), wherein the push rod (31) is movably arranged in the sleeve (32), wherein the sleeve (32) is movably arranged on the box body (1), and wherein the sleeve (32) is connected to the ejection mechanism, and wherein the push rod (31) is connected to the clutch mechanism. The door opening device further comprises a first limiting structure (41) and a second limiting structure (42), wherein both the first limiting structure (41) and the second limiting structure (42) are movably arranged on the box body (1), and wherein ... sleeve (32) is connected to the ejection mechanism, and wherein the first limiting structure (41) and the second limiting structure (42) are movably arranged on the box body (1), and wherein the sleeve (32) is connected to the ejection mechanism, and wherein the first limiting structure (41) and the second limiting structure (42) are movably arranged on the box body (1), and wherein the sleeve (32) is connected to the ejection mechanism, and wherein the sleeve (32) is connected to the clutch mechanism. The first limiting structure (41) is in limiting cooperation with the push rod (31), the second limiting structure (42) is in limiting cooperation with the sleeve (32), the door opening device further comprises a third limiting member (45) and a fourth limiting member (46), the third limiting member (45) and the fourth limiting member (46) are both arranged on the box body (1), and the sleeve (32) can move freely between the third limiting member (45) and the fourth limiting member (46), and in controlling the door opening device to automatically close the door according to the control signal, the device further comprises: When a door closing instruction is obtained, the push rod (31) is controlled to extend out of the sleeve (32), the second limiting structure (42) is controlled to cooperate with the sleeve (32) in a limiting manner, the first limiting structure (41) is controlled to disengage from the push rod (31), and the clutch mechanism is controlled to switch to a coupled state.

23. The method according to claim 20, characterized in that: The method further comprises: Determining whether the user rotates the door body (2); If so, the driving mechanism and the clutch mechanism are closed.

24. The method according to claim 23, characterized in that: In determining whether the user rotates the door body (2), the method further includes: Obtaining the rotation speed of the door body (2); If the rotation speed of the door body (2) is outside the preset range, it is determined that the user is rotating the door body (2).

25. The method according to claim 24, characterized in that: The clutch mechanism comprises a driving gear (51), a driven gear (52) and a connecting member (53); the driving gear (51) and the driven gear (52) are both rotatably arranged on the housing (1); a first transmission rack is arranged on the push rod (31); the driving gear (51) is meshed with the first transmission rack; the driven gear (52) is in transmission cooperation with the rotating mechanism; the connecting member (53) is movably arranged on the housing (1); and the driving gear (51) can drive the driven gear (52) through the connecting member (53); The door opening device further comprises a first transmission rod (55), the first transmission rod (55) being provided with a first meshing tooth and a second meshing tooth, the first meshing tooth being meshed with the driven gear (52), the second meshing tooth being meshed with the first rotating meshing gear (21), the door opening device further comprises a first displacement detection mechanism (56), the first displacement detection mechanism (56) being capable of acquiring the displacement of the first transmission rod (55), and the first displacement detection mechanism (56) being electrically connected to the clutch mechanism and / or the driving mechanism, and in acquiring the rotation rate of the door body (2), further comprising: The displacement rate of the first transmission rod (55) is acquired, and the rotation rate of the door body (2) is obtained according to the displacement rate of the first transmission rod (55).

26. The method according to claim 24, characterized in that: If yes, after closing the driving mechanism and the clutch mechanism, the method further includes: After the driving mechanism and the clutch mechanism are closed for a first set period of time, the door body (2) is controlled to rotate again.

27. The method according to claim 26, characterized in that: In the process of controlling the door body (2) to rotate again, the method further comprises: Obtaining the displacement direction of the first transmission rod (55); The rotation direction of the door body (2) is determined according to the displacement direction of the first transmission rod (55).

28. The method according to claim 23, characterized in that: The clutch mechanism comprises a driving gear (51), a driven gear (52) and a connecting member (53). The driving gear (51) and the driven gear (52) are both rotatably arranged on the housing (1). The push rod (31) is provided with a first transmission rack. The driving gear (51) meshes with the first transmission rack. The driven gear (52) cooperates with the rotating mechanism in transmission. The connecting member (53) is movably arranged on the housing (1). The driving gear (51) can drive the driven gear (52) through the connecting member (53). The driving gear (51) is provided with a first engaging hole. The driven gear (52) is provided with a second engaging hole. The connecting member (53) is movably arranged at the first engaging hole and the second engaging hole. When the clutch mechanism is in an engaged state, the connecting member (53) is simultaneously engaged with the first engaging hole and the second engaging hole. After determining whether the user rotates the door body (2), the clutch mechanism further comprises: If so, the driving gear (51) is controlled to rotate so that the first engaging hole can engage with the connecting member (53).

29. The method according to claim 20, characterized in that: Also includes: When the door body (2) rotates to the maximum opening, if the door body (2) is not closed within a second preset time period, the door body (2) is controlled to close.

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