CN113915932B - Refrigerator and control method thereof - Google Patents
Refrigerator and control method thereof Download PDFInfo
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- CN113915932B CN113915932B CN202110003666.2A CN202110003666A CN113915932B CN 113915932 B CN113915932 B CN 113915932B CN 202110003666 A CN202110003666 A CN 202110003666A CN 113915932 B CN113915932 B CN 113915932B
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- door body
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- photoelectric switch
- door
- driving
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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
- F25D29/00—Arrangement or mounting of control or safety devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
Abstract
The invention provides a refrigerator, which comprises a refrigerator body provided with a taking and placing port, a door body for opening or closing the taking and placing port, and an automatic door opening and closing unit; the automatic door opening and closing unit comprises a driving motor, an electromagnetic clutch comprising a driving part and a driven part, and a driving gear, wherein the driving part is fixed with an output shaft of the driving motor, and the driven part is fixed with the driving gear; one end of the driven part, which is close to the driving gear, is fixed with a reflecting plate with a reflecting area and a light filtering area, and one side of the driven part, which is close to the driving gear, is provided with a control plate with a plurality of photoelectric switches, and the photoelectric switches output a first signal when corresponding to the reflecting plate; the sequence of the photoelectric switch outputting the first signal indicates the movement trend of the door body; according to the invention, the operation intention of the user is judged through the movement trend of the door body, and after the user releases the hands, the automatic door opening and closing unit executes the original action of the user to assist the user to complete the rest operation; the user does not need to manually open the door in the whole process, so that the user can use the door conveniently, and the user experience is enhanced.
Description
Technical Field
The invention belongs to the technical field of household refrigerators, and particularly relates to a refrigerator and a control method thereof.
Background
At present, with the improvement of living standard, the automation demand of people on drawer doors is improved. Especially when both hands of the user have articles, the user needs to put down the articles with both hands and then open the door, so that inconvenience of the user is increased, and time and labor are wasted.
The existing refrigerator has an automatic door opening and closing mode and a manual door opening and closing mode at the same time so as to meet the demands of users; however, the automatic door opening and closing mode and the manual door opening and closing mode are relatively independent, and the manual door opening and closing can be performed only under the condition that the automatic door opening and closing mode is closed, otherwise, the manual door opening and closing cannot be performed. After the user is arranged to manually open and close the door for a certain distance, if the manual action is stopped, the movement of the door body is interrupted; this requires the user to perform a manual operation in the whole course of manually opening and closing the door, otherwise the opening and closing of the door body cannot be completed.
In view of this, the present invention has been proposed.
Disclosure of Invention
The invention provides a refrigerator control method aiming at the technical problems.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a refrigerator, comprising:
a case defining a storage compartment having a pick-and-place opening for picking and placing articles;
the door body is used for opening or closing the taking and placing port;
an automatic door opening and closing unit, comprising:
a driving motor connected to the door body;
an electromagnetic clutch including a driving portion fixed to an output shaft of the driving motor, and a driven portion for engaging with the driving portion;
the driving gear is fixedly connected with the output shaft of the electromagnetic clutch; when the driving gear rotates along the first direction, the door body closes the taking and placing opening; when rotating along a second direction opposite to the first direction, the door body opens the taking and placing opening;
the reflecting plate is fixed at one end of the driven part, which is close to the driving gear, and is provided with a reflecting area and a filtering area;
the control plate is arranged on one side of the reflecting plate, which is close to the driving gear; a first photoelectric switch, a second photoelectric switch, a … … jth photoelectric switch … … and an Nth photoelectric switch are sequentially arranged on the control panel along a second direction; when corresponding to the filtering area, the first photoelectric switch, the second photoelectric switch, the … … jth photoelectric switch … … and the nth photoelectric switch all output first signals; wherein N is more than or equal to 3, and N is a positive integer;
when the reflecting plate rotates along the second direction, the sequence of the photoelectric switches outputting the first signal is the sequence of the photoelectric switches arranged along the second direction, and the door body is in an opening trend;
when the reflecting plate rotates along the first direction, the sequence of the photoelectric switches outputting the first signal is the sequence of the photoelectric switches arranged according to the first direction, and the door body is in a closing trend.
Preferably, each photoelectric switch is disposed on the same circumference with the rotation center of the reflecting plate as the center of circle.
Preferably, the included angles of the radii of the adjacent two-phase photoelectric switches are equal.
Preferably, the reflection plate is provided as a mirror surface, wherein a partial region is provided as a black filter material to form a filter region.
Preferably, the automatic door opening and closing unit comprises a rack installed on the box body and a first gear installed on the door body; the two first gears are connected through a synchronizing rod, a second gear is further fixed on the synchronizing rod, the driving gear transmits driving force to the first gears through the second gear, the synchronizing rod transmits the power to the first gears on the other side synchronously, so that the first gears synchronously move on the racks to drive the door body to move.
The control method of the refrigerator comprises the following steps:
s1: the user manually moves the door body; entering a door body movement trend judging program, and determining a door body movement trend according to the sequence of photoelectric switches outputting a first signal;
s2: judging whether to execute automatic door opening and closing;
if not, the automatic door opening and closing unit keeps stopping working;
if yes, the driving motor and the electromagnetic clutch of the automatic door opening and closing unit are electrified, the driving motor transmits driving force to the driving gear through the electromagnetic clutch, and the driving gear drives the door body to move to the limit position corresponding to the determined door body movement trend.
Preferably, step S1 specifically includes:
when the user manually moves the door body, the time interval delta t between the ith first signal and the (i+1) th first signal is judged 1 And a preset time interval threshold delta t 1 Is of a size of (2); wherein H is more than or equal to i and more than or equal to 1, and the initial value of i is 1 and is a positive integer;
when Deltat 1 `≤△t 1 When the door body moving trend judging program is entered, the moving trend of the door body is judged according to the sequence of the photoelectric switches outputting the first signals, and then the step S2 is executed;
when Deltat 1 `＞△t 1 When i=i+1; then, the time interval Deltat between the ith first signal and the (i+1) th first signal is judged again 1 And a preset time interval threshold delta t 1 Is of a size of (a) and (b).
Preferably, step S2 specifically includes:
judging a preset time period threshold delta t after outputting the (i+1) th first signal 2 Whether the (i+2) th first signal is output;
if the (i+2) th first signal is output, exiting the door body movement trend judging program, and keeping the automatic door opening and closing unit to stop working;
and if the (i+2) th first signal is not output, exiting the door body movement trend judging program, electrifying a driving motor and an electromagnetic clutch of the automatic door opening and closing unit, transmitting driving force to a driving gear by the driving motor through the electromagnetic clutch, and driving the door body to move to a limit position corresponding to the determined door body movement trend by the driving gear.
Preferably, Δt 2 ＞△t 1 。
Preferably, the control board is provided with N photoelectric switches, N is more than or equal to 3, and N is a positive integer;
the position of the door body is recorded as a first limit position when the door body is closed, the first photoelectric switch corresponds to the light filtering area, and the first photoelectric switch outputs a first signal;
the driving gear rotates for M circles along the second direction, so that the door body can move from the first limit position to the second limit position, and H=MN+1 first signals are output; wherein M is a positive integer;
when the total amount of the output first signals reaches H, the door body is judged to move to the limit position consistent with the movement trend of the door body, and the automatic door opening and closing unit stops working.
Compared with the prior art, the invention has the advantages and positive effects that:
the invention provides a refrigerator, which comprises a refrigerator body provided with a taking and placing port, a door body for opening or closing the taking and placing port, and an automatic door opening and closing unit; the automatic door opening and closing unit comprises a driving motor, an electromagnetic clutch comprising a driving part and a driven part, and a driving gear, wherein the driving part is fixed with an output shaft of the driving motor, and the driven part is fixed with the driving gear; one end of the driven part, which is close to the driving gear, is fixed with a reflecting plate with a reflecting area and a light filtering area, and one side of the driven part, which is close to the driving gear, is provided with a control plate with a plurality of photoelectric switches, and the photoelectric switches output a first signal when corresponding to the reflecting plate; the sequence of the photoelectric switch outputting the first signal indicates the movement trend of the door body; according to the invention, the operation intention of the user is judged through the movement trend of the door body, and after the user releases the hands, the automatic door opening and closing unit executes the original action of the user to assist the user to complete the rest operation; the user does not need to manually open the door in the whole course; if the door is opened, the door continues to rotate along the opening direction, if the door is closed, the door continues to rotate along the closing direction, so that the door is convenient for a user to use, and the user experience is enhanced.
Drawings
Fig. 1 is a schematic view of the overall structure of a refrigerator according to the present invention;
fig. 2 is a partial structural schematic view of the refrigerator of the present invention;
FIG. 3 is an enlarged view of a portion of the area of FIG. 2;
fig. 4 is a schematic view of an automatic door opening and closing unit of the refrigerator of the present invention in a door open state;
fig. 5 is a schematic view showing a structure of an automatic door opening and closing unit according to another view angle in an opened state of a door body of the refrigerator of the present invention;
fig. 6 is a schematic view of a driving unit of the refrigerator of the present invention;
fig. 7 is an exploded view of a driving unit of the refrigerator of the present invention;
fig. 8 is a schematic structural view of a control board of the refrigerator of the present invention;
fig. 9 is a schematic view of a structure of a reflection plate of the refrigerator of the present invention;
fig. 10 is a flowchart of a control method of the refrigerator of the present invention.
In the above figures: a refrigerator 1; a case 10; an inner container 11; a storage container 12; a rail bracket 13; a door body 14; a support 15; a synchronizing lever 16; a housing 17; a stationary cover 18; a storage compartment 19; a pick-and-place port 20; a rack 21; a drive gear 2; a drive motor 3; an electromagnetic clutch 4; an active portion 41; a driven portion 42; a reflection plate 5; a light filtering region 51; a reflection region 52; a drive unit 6; a first gear 8; a control board 7; a first photoelectric switch K1; a second photoelectric switch K2; a third photoelectric switch K3; a second gear 9.
Detailed Description
The present invention will be further described with reference to specific examples so that those skilled in the art may better understand the present invention and practice it, but the scope of the present invention is not limited to the scope described in the specific embodiments. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be arbitrarily combined with each other.
It should be noted that the description of "first", "second", etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implying an indication of the number of technical features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.
In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
As shown in fig. 1 to 9, a refrigerator 1 includes a cabinet 10 defining a storage compartment 19 having a pick-and-place port 20; the case 10 includes a housing, an inner container 11, and a thermal insulation layer therebetween; the storage compartment 19 is surrounded by the inner container 11, in which a drawer storage unit is provided. The drawer storage unit has a drawer door that opens or closes the access opening 20, and a tray-shaped storage container 12 is connected to the rear side of the drawer door for storing articles. The user obtains the items located in the storage compartment 19 or stores the items in the storage compartment 19 by pushing or pulling the storage container 12 into or out of the storage compartment 19.
As shown in fig. 2 to 5, the drawer door includes a door body 14 and two rail brackets 13 located at the rear side of the door body 14, a rail is installed on the rail brackets 13, a supporting frame 15 is connected between the two rail brackets 13, and the drawer door can be slidably connected to the box body 10 along the rail.
The case 10 further includes an automatic door opening and closing unit including a rack 21 mounted on the case 10, a first gear 8 mounted on the drawer door, and a driving unit 6 for driving the first gear 8 to rotate. Wherein, the automatic door opening and closing unit also comprises a driving gear 2, and two first gears 8 are connected through a synchronizing rod 16; the second gear 9 is also fixed on the synchronizing rod 16, the driving gear 2 transmits driving force to the first gear 8 through the second gear 9, the synchronizing rod 16 synchronously transmits power to the first gear 8 on the other side, so that the first gear 8 synchronously moves on the rack 21 to drive the drawer door to realize whole-course sliding. The first gear 8 and the second gear 9 rotate in the same direction, and the first gear 8 and the driving gear 2 rotate in opposite directions.
As shown in fig. 4 to 9, the driving unit 6 includes a driving motor 3 and an electromagnetic clutch 4 sequentially connected through an output shaft; the drive motor 3 and the electromagnetic clutch 4 are coaxially arranged. The output shaft of the driving motor 3 is connected with the electromagnetic clutch 4, the output shaft of the electromagnetic clutch 4 passes through the control board 7 and is fixedly connected with the driving gear 2, the electromagnetic clutch 4 transmits or cuts off the power transmitted by the driving motor 3, and finally the power of the driving motor 3 is transmitted to the driving gear 2 to drive the driving gear 2 to move. It should be noted that a reduction gearbox may also be provided, the driving motor 3 and the reduction gearbox are integrally provided, and an output shaft of the reduction gearbox is connected with the electromagnetic clutch 4; the driving motor 3 drives the reduction gearbox to move, and the reduction gearbox adjusts the working speed of the driving motor 3.
The electromagnetic clutch 4 comprises a driving part 41 and a driven part 42, wherein the driving part 41 comprises an input shaft of the electromagnetic clutch 4 connected with an output shaft of the driving motor 3, and the driven part 42 comprises an output shaft of the electromagnetic clutch 4 fixedly connected with the driving gear 2; when the electromagnetic clutch 4 is electrified, the driving part 41 and the driven part 42 are attracted into a whole, so that the power of the driving motor 3 is transmitted to the driving gear 2 to drive the driving gear 2 to move. When the electromagnetic clutch 4 is powered off, the driving part 41 and the driven part 42 are separated, and the driving gear 2 and the driving motor 3 are separated, so that the electromagnetic clutch is not affected by each other.
The automatic door opening and closing unit further comprises a shell 17 for packaging the driving unit 6, and the driving motor 3, the reduction gearbox, the electromagnetic clutch 4 and the control panel 7 are arranged in the cavity; wherein, a fixed cover 18 is arranged at one end of the shell 17 close to the driving motor 3, and the control panel 7 is arranged in the fixed cover 18; the output shaft of the electromagnetic clutch 4 passes through the control plate 7 and the fixed cover 18 to be fixedly connected with the driving gear 2; when the electromagnetic clutch 4 is electrified, the driving motor 3 works, and the output shaft of the electromagnetic clutch 4 drives the driving gear 2 to rotate; correspondingly, when the electromagnetic clutch 4 is powered off, the external force drives the driving gear 2 to rotate, and the driving gear 2 drives the driven part 42 of the electromagnetic clutch 4 to synchronously rotate with the driven part.
Wherein, the end of the driven part 42 of the electromagnetic clutch 4 near the control plate 7 is provided with a reflecting plate 5, and the reflecting plate 5 rotates along with the driven part 42 of the electromagnetic clutch 4. The control panel 7 is provided with a photoelectric switch at one end close to the reflecting plate 5. Wherein, the reflecting plate 5 is formed with a filtering area 51 and a reflecting area 52, and outputs a first signal when the photoelectric switch corresponds to the filtering area 51; when the photoelectric switch corresponds to the reflection area 52, a second signal is output; in this embodiment, the first signal is "0" and the second signal is "1". The driven portion 42 of the electromagnetic clutch 4 is provided as a friction plate, the reflection plate 5 is fixed to the friction plate, and the reflection plate 5 rotates with the friction plate. The reflection plate 5 is provided as a mirror surface in which a certain area is provided as a black filter material to form a filter area 51. In this embodiment, the reflection plate 5 has a circular ring shape.
The first gear 8 rotates along the first direction to drive the door body 14 to move forwards, and the drawer storage unit is opened; conversely, rotation of the first gear 8 in a second direction opposite to the first direction can drive the door 14 to move forward, closing the drawer storage unit.
Wherein, the control board 7 is annular, and N photoelectric switches are arranged on the control board 7; the photoelectric switches are arranged on one side of the control board 7 away from the driving gear 2; in the end face of the control board 7, which is far away from the side of the driving gear 2, the N photoelectric switches are sequentially marked as a first photoelectric switch, a second photoelectric switch, a … … jth photoelectric switch … … and an Nth photoelectric switch according to a second direction; n is more than or equal to 3, N is a positive integer, and N is more than or equal to j is more than or equal to 1.
Wherein the second direction is the rotational direction of the gear, which is the circumferential direction. The plurality of photoelectric switches are circumferentially distributed; according to the initial position of the door 14 when moving, the relative positions of the filtering area and the photoelectric switch, the sequence of the photoelectric switch numbers outputting the first signal when the door 14 moves is different, but the sequence of the photoelectric switch numbers accords with the arrangement sequence of the photoelectric switch in the corresponding direction. Specifically, when the reflecting plate 5 rotates along the second direction, the sequence of the photoelectric switches outputting the first signal is the sequence of the photoelectric switches arranged along the second direction, and the door body is in an opening trend; when the reflecting plate 5 rotates in the first direction, the sequence of the photoelectric switches outputting the first signal is the sequence of the photoelectric switches arranged in the first direction, and the door body is in a closing trend. The photoelectric switching sequence for outputting the first signals needs to output at least two first signals to obtain the photoelectric switching sequence for outputting the first signals.
For example, when the door 14 is completely opened or closed, the first photoelectric switch corresponds to the filtering area in both states, and when the reflecting plate 5 rotates along the second direction, the photoelectric switches outputting the first signal are the first photoelectric switch, the second photoelectric switch, the … … jth photoelectric switch … … and the nth photoelectric switch in sequence, and the door is in an opening trend; when the reflecting plate 5 rotates along the first direction, the photoelectric switches outputting the first signal are the first photoelectric switch, the nth photoelectric switch, the … … jth photoelectric switch … … second photoelectric switch in sequence, and the door body is in a closing trend. As another way, when the door 14 is completely opened or closed, the area between the first photoelectric switch and the ith photoelectric switch on the control board corresponds to the filtering area, and when the reflecting plate 5 rotates along the second direction, the photoelectric switches outputting the first signal are the first photoelectric switch, the second photoelectric switch, the … … jth photoelectric switch … … and the nth photoelectric switch in sequence, and the door is in an opening trend; when the reflecting plate 5 rotates along the first direction, the photoelectric switches outputting the first signal are the nth photoelectric switch, the … … jth photoelectric switch … … second photoelectric switch and the first photoelectric switch in sequence, and the door body is in a closing trend.
In the embodiment, 3 photoelectric switches are arranged, and the included angle between two adjacent photoelectric switches is 120 degrees; the first photoelectric switch K1, the second photoelectric switch K2 and the third photoelectric switch K3 are sequentially marked according to the second direction. At least 3 photo switches are provided to ensure that the order of the photo switches outputting the first signal when the reflection plate 5 rotates in the second direction is different from the order of the photo switches outputting the first signal when the reflection plate 5 rotates in the first direction, thereby judging the moving trend of the door body 14 according to the order of the photo switches outputting the first signal when the reflection plate 5 rotates. When more than three photoelectric switches are provided, the movement trend of the door body 14 can be further confirmed, so that the accuracy and the effectiveness of judgment can be ensured. In the embodiment, N photoelectric switches are distributed on the same circumference, and the included angle of the radius of each two adjacent photoelectric switches is a=360°/N; it should be understood that, on the one hand, the N photoelectric switches are not limited to being disposed on the same circumference; as shown in the figure, the N photoelectric switches may be arranged to be distributed in the circumferential direction, but not on the same circle, and the distances from each photoelectric switch to the rotation center are different; in addition, the included angle between two adjacent photoelectric switches is not limited to the above arrangement, and the included angle A of the radius where the two adjacent photoelectric switches are located can be set to be different.
The position of the drawer door is recorded as a first limit position when the drawer door is completely closed, and the driving gear 2 rotates for M circles along a second direction so as to drive the drawer door to reach a second limit position from the first limit position; correspondingly, the driving gear 2 rotates M times along the first direction, so that the drawer door can return to the first limit position from the second limit position. In this embodiment, M is a positive integer. The drawer door moves from the first limit position to the second limit position, and the total travel of the door body 14 is S. In this embodiment, m=4, i.e. four rotations of the driving gear 2 can cause the drawer door to move from the first limit position to the second limit position.
When the drawer door is closed, the drawer door is at the first limit position, the first photoelectric switch K1 corresponds to the optical filtering area 51, at the moment, the output signal of the first photoelectric switch K1 is a first signal '0', the output signal of the second photoelectric switch K2 is a second signal '1', and the output signal of the third photoelectric switch K3 is a second signal '1'.
When the drawer door is opened manually, the clutch cuts off the connection between the driving motor 3 and the driving gear 2, and the first gear 8 rotates in a first direction under the action of external force applied by a user and moves forward along the rack 21; under the drive of the first gear 8, the second gear 9 and the first gear 8 rotate in the same direction along the first direction, the second gear 9 drives the driving gear 2 to rotate along the second direction, the driving gear 2 drives the reflecting plate 5 to rotate along the second direction, and then the light filtering area 51 of the reflecting plate 5 sequentially corresponds to the first photoelectric switch K1, the second photoelectric switch K2 and the third photoelectric switch K3 in one period of rotation along the second direction, namely, the first photoelectric switch K1, the second photoelectric switch K2 and the third photoelectric switch K3 sequentially output first signals in one period of rotation along the second direction of the reflecting plate 5; that is, the sequence of the photoelectric switches outputting the first signal when the drawer door is opened manually is K1- & gtK 2- & gtK 3.
When the drawer is manually closed, the clutch cuts off the connection between the driving motor 3 and the driving gear 2, and the first gear 8 rotates in the second direction under the action of external force and moves backwards along the rack 21; under the drive of the first gear 8, the second gear 9 and the first gear 8 rotate in the same direction along the second direction, the second gear 9 drives the driving gear 2 to rotate along the first direction, the driving gear 2 drives the reflecting plate 5 to rotate along the first direction, and then the filtering area 51 of the reflecting plate 5 sequentially corresponds to the first photoelectric switch K1, the third photoelectric switch K3 and the second photoelectric switch K2 in one period of rotation along the first direction, namely, the first photoelectric switch K1, the third photoelectric switch K3 and the second photoelectric switch K2 sequentially output first signals in one period of rotation along the first direction of the reflecting plate 5; namely, when the drawer door is manually closed, the photoelectric switch sequence for outputting the first signal is K1- & gtK 3- & gtK 2.
The included angle between the two adjacent photoelectric switches is a=360°/N, so that the distance between every two adjacent first signals output by the two adjacent photoelectric switches is Δl=s/W, where w=mn; in this embodiment, w=mn= 4*3 =12, where M is the total number of turns of the driving gear 2 in the maximum stroke (from the first limit position to the second limit position), and N is the number of photoelectric switches. The door body 14 drives the gear 2 to rotate M circles from the first limit position to the second limit position, and when the M circles of rotation are completed, the first photoelectric switch K1 corresponds to the light filtering area 51 again; that is, when the door 14 is at the first limit position and the second limit position, the first photoelectric switches K1 correspond to the filter area 51, and the first signals are output as the first photoelectric switches K1. Throughout the movement between the first and second extreme positions, a total of h=w+1=mn+1 first signals are output. In this embodiment, h=4×3+1=13.
The moving trend of the door body is judged by the fact that the sequence of the photoelectric switch outputting the first signal when the drawer door is manually opened is different from the sequence of the photoelectric switch outputting the first signal when the drawer door is manually closed. The door is opened when the sequence of the photoelectric switches outputting the first signal is K1→K2, and the door is closed when the sequence of the photoelectric switches outputting the first signal is K1→K3.
As shown in fig. 10, the control method of the refrigerator includes the steps of:
s1: the user manually moves the door body; and entering a door body movement trend judging program, and determining the movement trend of the door body according to the sequence of photoelectric switches outputting the first signal.
In this embodiment, when the user manually moves the door body, the time interval Δt between the i-th first signal and the i+1-th first signal is determined 1 And a preset time interval threshold delta t 1 Is of a size of (2); wherein i represents the number of the output first signals, i is more than or equal to 1, and the initial value of i is 1;
when Deltat 1 `≤△t 1 When the door body movement trend judging program is entered, acquiring a photoelectric switch sequence for outputting a first signal, judging the movement trend of the door body according to the photoelectric switch sequence for outputting the first signal, and then executing step S2;
when Deltat 1 `＞△t 1 When i=i+1, then again judging the time interval delta t between the output ith first signal and the (i+1) th first signal 1 And a preset time interval threshold delta t 1 Is of a size of (a) and (b).
Specifically, in this embodiment, when the door body is at the first limit position and the second limit position, the first photoelectric switches K1 correspond to the filtering area 51, and the first signals are output as the first photoelectric switches K1; that is, when the first limit position or the second limit position is set, a first signal is output by the first photoelectric switch K1;
the door body is opened, the door body moves from a first limit position to a second limit position, the driving gear 2 rotates along a second direction, the reflecting plate 5 rotates along the second direction, a second first signal is output by the second photoelectric switch K2, and a third first signal is output by the third photoelectric switch K3; if the time interval between the second first signal output by the second photoelectric switch K2 and the first signal output by the first photoelectric switch K1 is less than or equal to a preset time interval threshold delta t 1 Entering a door body movement trend judging program; otherwise, judging the time interval between the third first signal output by the third photoelectric switch and the second first signal output by the second photoelectric switch and the preset time interval threshold delta t 1 Is a size relationship of (a). The door is closed, and the situation when the door moves from the second limit position to the first limit position is similar to the situation when the door moves from the second limit position to the first limit position, and the details are not repeated here.
It should be noted that, the above method determines the time interval between two adjacent first signals and the preset time interval threshold Δt 1 The method of determining whether to enter the door movement trend determining program is applicable not only to the case where the photoelectric switch corresponds to the light filtering area 51 of the reflecting plate 5 at the first limit position or the second limit position, but also to the case where the photoelectric switch corresponds to the reflecting area 52 of the reflecting plate 5 at the first limit position or the second limit position.
In the case that the photoelectric switch corresponds to the reflection area 52 of the reflection plate 5 in the first limit position or the second limit position, since the movement of the door body can be indicated from the initial second signal to the received first signal, the movement trend determining program of the door body can be entered when the first signal is received.
It should be understood that the method is not limited to the above, and the photoelectric switch closest to the area corresponding to the optical filtering area 51 may be set as the object in the first limit position or the second limit position, and the input door movement trend determining program may be entered when the signal output by the photoelectric switch is changed.
S2: judging whether to execute automatic door opening and closing;
if not, the automatic door opening and closing unit keeps stopping working;
if yes, the driving motor and the electromagnetic clutch of the automatic door opening and closing unit are electrified, the driving motor transmits driving force to the driving gear through the electromagnetic clutch, and the driving gear drives the door body to move to the limit position corresponding to the determined door body movement trend.
Specifically, in this embodiment, the specific method in step S2 is as follows:
judging a preset time period threshold delta t after outputting the (i+1) th first signal 2 Whether the (i+2) th first signal is output;
if the (i+2) th first signal is output, the door body movement trend judging program is exited, and the automatic door opening and closing unit keeps stopping working.
If the (i+2) th first signal is not output, the door body movement trend judging program is exited, the driving motor 3 and the electromagnetic clutch 4 of the automatic door opening and closing unit are electrified, the driving motor 3 transmits driving force to the driving gear 2 through the electromagnetic clutch 4, the driving gear 2 drives the first gear 8 to move along the rack 21 through the second gear 9, and finally the door body is driven to move to the limit position corresponding to the determined door body movement trend.
Specifically, when step S1 determines that the movement trend of the door body is an opening trend, the driving motor 3 drives the driving gear 2 to rotate along the second direction, and the driving gear 2 drives the first gear 8 to rotate along the first direction, so that the door body is automatically opened to the second limit position.
When the step S1 determines that the movement trend of the door body is the closing trend, the driving motor 3 drives the driving gear 2 to rotate along the first direction, and the driving gear 2 drives the first gear 8 to rotate along the second direction, so that the door body is automatically closed to the first limit position.
In the above step S2, deltat after the (i+1) th first signal is outputted 2 The (i+2) th first signal is output internally, indicating that at 2 At least two first signals are internally output, and the user is judged to be continuously and manually operatedA movable door body which does not want to obtain an auxiliary function of the automatic door opening and closing unit.
Δt after outputting the (i+1) th first signal 2 No i+2th first signal is output, indicating at Deltat 0 And if the first signal is not output, judging that the user stops manually moving the door body and hopes to acquire the auxiliary effect of the automatic door opening and closing unit, starting the automatic door opening and closing unit, completing the movement operation of the rest door body, and moving the door body to the limit position consistent with the movement trend of the door body. In this embodiment, Δt 2 ＞△t 1 。
In the process of opening and closing the door, the final state of the door body is at the first limit position or the second limit position, and the total amount of the first signals output in the whole process is constant. Judging whether the door body reaches the limit position consistent with the movement trend of the door body or not through the number of the output first signals so as to control the automatic door opening and closing unit to stop working. In the present embodiment, h=w+1=mn+1 first signals are output in total throughout the movement between the first limit position and the second limit position. And in a single movement period (from the first limit position to the second limit position or from the second limit position to the first limit position), when the total amount of the output first signals reaches H, judging that the door body moves to the limit position consistent with the movement trend of the door body, and stopping working of the automatic door opening and closing unit.
In this embodiment, i represents the number of the first signals to be output, and when the sequence of the photoelectric switches of the first signals to be output is k1→k2 or k2→k3 or k3→k1, it indicates that the reflecting plate 5 rotates in the second direction, and the door body movement trend is an opening trend, i=i+1; when i=h=13, the door body moves to the second limit position, and the door body stops moving.
Conversely, when the photoelectric switching sequence of the output first signal is k1→k3 or k3→k2 or k2→k1, it is indicated that the reflecting plate 5 rotates in the first direction, and the door body movement trend is the closing trend, i=i+1; when i=h=13, the door body moves to the first limit position, and the door body stops moving.
In the invention, a plurality of photoelectric switches are arranged on a fixed control board, and a reflecting plate with a light filtering area and a reflecting area is arranged, so that first signals sent by different photoelectric switches are output when the reflecting plate rotates, and the movement trend of a door body is determined by judging the sequence of the photoelectric switches of the plurality of output first signals; and when the user does not want to continue to manually move the door body, the automatic door opening and closing unit is started, and the automatic door opening and closing unit assists the user to complete door body moving operation conforming to the door body moving trend. According to the invention, the operation intention of the user is judged through the movement trend of the door body, and after the user releases the hands, the automatic door opening and closing unit executes the original action of the user to assist the user to complete the rest operation; the user does not need to manually open the door in the whole course; if the door is opened, the door continues to rotate along the opening direction, if the door is closed, the door continues to rotate along the closing direction, so that the door is convenient for a user to use, and the user experience is enhanced.
The present invention is not limited to the above-mentioned embodiments, and any equivalent embodiments which can be changed or modified by the technical content disclosed above can be applied to other fields, but any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical substance of the present invention without departing from the technical content of the present invention still belong to the protection scope of the technical solution of the present invention.
Claims (10)
1. Refrigerator, characterized in that it comprises:
a case defining a storage compartment having a pick-and-place opening for picking and placing articles;
the door body is used for opening or closing the taking and placing port;
an automatic door opening and closing unit, comprising:
a driving motor connected to the door body;
an electromagnetic clutch including a driving portion fixed to an output shaft of the driving motor, and a driven portion for engaging with the driving portion;
the driving gear is fixedly connected with the output shaft of the electromagnetic clutch; when the driving gear rotates along the first direction, the door body closes the taking and placing opening; when rotating along a second direction opposite to the first direction, the door body opens the taking and placing opening;
the reflecting plate is fixed at one end of the driven part, which is close to the driving gear, and is provided with a reflecting area and a filtering area;
the control plate is arranged on one side of the reflecting plate, which is close to the driving gear; a first photoelectric switch, a second photoelectric switch, a … … jth photoelectric switch … … and an Nth photoelectric switch are sequentially arranged on the control panel along a second direction; when corresponding to the filtering area, the first photoelectric switch, the second photoelectric switch, the … … jth photoelectric switch … … and the nth photoelectric switch all output first signals; wherein N is more than or equal to 3, N is a positive integer, N is more than or equal to j is more than or equal to 1, and j is a positive integer;
when the reflecting plate rotates along the second direction, the sequence of the photoelectric switches outputting the first signal is the sequence of the photoelectric switches arranged along the second direction, and the door body is in an opening trend;
when the reflecting plate rotates along the first direction, the sequence of the photoelectric switches outputting the first signal is the sequence of the photoelectric switches arranged according to the first direction, and the door body is in a closing trend.
2. The refrigerator of claim 1, wherein: each photoelectric switch is arranged on the same circumference taking the rotation center of the reflecting plate as the circle center.
3. The refrigerator of claim 2, wherein: the included angles of the radiuses of the adjacent two-phase photoelectric switches are equal.
4. The refrigerator according to claim 1 or 2 or 3, wherein: the reflection plate is provided as a mirror surface in which a partial region is provided as a black filter material to form a filter region.
5. The refrigerator of claim 4, wherein: the automatic door opening and closing unit comprises a rack arranged on the box body and a first gear arranged on the door body; the two first gears are connected through a synchronizing rod, a second gear is further fixed on the synchronizing rod, the driving gear transmits driving force to the first gears through the second gear, the synchronizing rod transmits the power to the first gears on the other side synchronously, so that the first gears synchronously move on the racks to drive the door body to move.
6. A control method of a refrigerator according to any one of claims 1 to 5, characterized in that: which comprises the following steps:
s1: the user manually moves the door body; entering a door body movement trend judging program, and determining a door body movement trend according to the sequence of photoelectric switches outputting a first signal;
s2: judging whether to execute automatic door opening and closing;
if not, the automatic door opening and closing unit keeps stopping working;
if yes, the driving motor and the electromagnetic clutch of the automatic door opening and closing unit are electrified, the driving motor transmits driving force to the driving gear through the electromagnetic clutch, and the driving gear drives the door body to move to the limit position corresponding to the determined door body movement trend.
7. The control method of a refrigerator according to claim 6, wherein: the step S1 specifically comprises the following steps:
when the user manually moves the door body, the time interval delta t between the ith first signal and the (i+1) th first signal is judged 1 And a preset time interval threshold delta t 1 Is of a size of (2); wherein H is more than or equal to i and more than or equal to 1, and the initial value of i is 1 and is a positive integer;
when Deltat 1 `≤△t 1 When the door body moving trend judging program is entered, the moving trend of the door body is judged according to the sequence of the photoelectric switches outputting the first signals, and then the step S2 is executed;
when Deltat 1 `＞△t 1 When i=i+1; then, the time interval Deltat between the ith first signal and the (i+1) th first signal is judged again 1 And a preset time interval threshold delta t 1 Is of a size of (a) and (b).
8. The control method of a refrigerator according to claim 7, wherein: the step S2 specifically comprises the following steps:
judging a preset time period threshold delta t after outputting the (i+1) th first signal 2 Whether the (i+2) th first signal is output;
if the (i+2) th first signal is output, exiting the door body movement trend judging program, and keeping the automatic door opening and closing unit to stop working;
and if the (i+2) th first signal is not output, exiting the door body movement trend judging program, electrifying a driving motor and an electromagnetic clutch of the automatic door opening and closing unit, transmitting driving force to a driving gear by the driving motor through the electromagnetic clutch, and driving the door body to move to a limit position corresponding to the determined door body movement trend by the driving gear.
9. The control method of a refrigerator according to claim 8, wherein: Δt (delta t) 2 ＞△t 1 。
10. The control method of a refrigerator according to claim 9, wherein: n photoelectric switches are arranged on the control panel, N is more than or equal to 3, and N is a positive integer;
the position of the door body is recorded as a first limit position when the door body is closed, the first photoelectric switch corresponds to the light filtering area, and the first photoelectric switch outputs a first signal;
the driving gear rotates for M circles along the second direction, so that the door body can move from the first limit position to the second limit position, and H=MN+1 first signals are output; wherein M is a positive integer;
when the total amount of the output first signals reaches H, the door body is judged to move to the limit position consistent with the movement trend of the door body, and the automatic door opening and closing unit stops working.
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| CN202110003666.2A CN113915932B (en) | 2021-01-04 | 2021-01-04 | Refrigerator and control method thereof |
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| CN202110003666.2A CN113915932B (en) | 2021-01-04 | 2021-01-04 | Refrigerator and control method thereof |
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| CN113915932A CN113915932A (en) | 2022-01-11 |
| CN113915932B true CN113915932B (en) | 2023-04-28 |
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| CN111550962A (en) * | 2020-05-11 | 2020-08-18 | 海信（山东）冰箱有限公司 | Refrigerator with a door |
| CN111664642A (en) * | 2020-06-01 | 2020-09-15 | 青岛恒业世纪科技发展有限公司 | Electric opening and closing system and method for side-opening door body of refrigerator |
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|---|---|---|---|---|
| CN102278033A (en) * | 2010-06-08 | 2011-12-14 | 苏州三星电子有限公司 | Automatic door opening device and side by side combination refrigerator using same |
| CN203909244U (en) * | 2014-05-28 | 2014-10-29 | 中国有色（沈阳）冶金机械有限公司 | Motor monitoring device |
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| Publication number | Publication date |
|---|---|
| CN113915932A (en) | 2022-01-11 |
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Address after: 266736 No. 8 Haixin Avenue, Nancun Town, Pingdu City, Qingdao City, Shandong Province Applicant after: Hisense refrigerator Co.,Ltd. Address before: 266736 No. 8 Haixin Avenue, Nancun Town, Pingdu City, Qingdao City, Shandong Province Applicant before: HISENSE (SHANDONG) REFRIGERATOR Co.,Ltd. |
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