Control method for refrigerator and refrigerator

Abstract

According to the control method for the refrigerator and the refrigerator, two layers of magnetic structures are arranged on a hinge assembly, each layer of magnetic structure comprises at least three magnetic parts arranged at intervals, the magnetic parts of the two layers of magnetic structures form at least three magnetic part sets in a one-to-one correspondence mode, and at least one magnetic part in each magnetic part set is an electromagnet. The two magnetic pieces in the magnetic piece set attract each other, and through electromagnetic control, electric attraction of the box door is achieved to ensure that the box door can be closed tightly, opening and closing of the box door decelerate to reduce noise, and the box door stably hovers at an expected angle. Meanwhile, the hinge assembly is simple in structure, and the box body or the box door structure does not need to be changed.

Description

Technical Field

[0001] The present application relates to the technical field of refrigerators, and in particular to a control method for a refrigerator and a refrigerator using the control method. Background Art

[0002] As an indispensable electrical appliance in home life, refrigerators occupy an important share of the market. Refrigerators generally include a body and a door, and the door can rotate relative to the body to open or close the storage chamber. In the related art, a mechanical hinge is used to connect the body and the door, so that the door can rotate relative to the body. However, it is difficult for users to control the force when opening or closing the door. When the user does not use enough force, the refrigerator door will produce a relatively loud noise and vibration, and the door cannot stably hover at the desired angle and there is a problem that the door is not closed tightly.

[0003] In order to solve the technical problems of using the above mechanical hinges to connect the box body and the door, the industry has proposed to improve the structure of the existing mechanical hinges, such as integrating springs and other structures to form a buffering effect, reducing the relatively loud noise and vibration caused by the user's improper force when opening and closing the door. However, this method greatly increases the structural complexity of the mechanical hinge, and the use of the mechanical hinge with improved structure to connect the box body and the door still has the problem that the door cannot stably hover at the desired angle and the door is not closed tightly.

[0004] Therefore, there is an urgent need to optimize the hinge structure and control method of the refrigerator so that the door can be stably suspended or the door can be ensured to be closed tightly. Summary of the invention

[0005] In order to solve the above-mentioned problems of the prior art, the present application provides a control method for a refrigerator and a refrigerator using the control method.

[0006] The first embodiment of the present application provides a control method for a refrigerator, wherein the refrigerator includes a cabinet, a cabinet door, a hinge assembly and a cabinet door switch detection unit, wherein the cabinet is constructed with at least one storage chamber with an access opening; the cabinet door can move relative to the cabinet to open or close the access opening of the storage chamber; the hinge assembly connects the cabinet and the cabinet door, and includes two layers of magnetic structure, wherein one layer of magnetic structure is fixed to the cabinet, and the other layer of magnetic structure is fixed to the cabinet door, each layer of magnetic structure includes at least three magnetic members arranged at intervals, and the magnetic members of the two layers of magnetic structures correspond to each other to form at least three magnetic member groups, and with the movement of the cabinet door, two magnetic members in the magnetic member group are selectively stacked together, at least one magnetic member in the magnetic member group is an electromagnet, and when powered on, the two magnetic members in the magnetic member group attract each other; the cabinet door switch detection unit is configured to detect the opening and closing of the cabinet door.

[0007] The control method includes: when the door switch detection unit detects that the door is open, providing current to the electromagnet at a first position, the first position being the position of a magnetic member group in the hinge assembly where two magnetic members are stacked together when the door is closed; when it is detected that the current of the electromagnet at the first position drops, providing current to the electromagnet at a second position, the second position being the position of a magnetic member group in the hinge assembly where two magnetic members are stacked together when the door opening angle is greater than zero, and the second position is adjacent to the first position; when it is detected that the electromagnet at the second position generates a preset current peak, providing current to the electromagnet at a third position, the third position being the position of a magnetic member group in the hinge assembly where two magnetic members are stacked together when the door opening angle is greater than zero, and the door opening angle corresponding to the third position is greater than the door opening angle corresponding to the second position, and the third position is adjacent to the second position; if the electromagnet at the third position is not detected to generate a preset current peak within a preset time, increasing the current provided to the electromagnet at the second position.

[0008] In the control method provided in the second embodiment of the present application, the providing of current to the electromagnet at the first position includes: providing the first current to the electromagnet at the first position; the providing of current to the electromagnet at the second position includes: providing the first current to the electromagnet at the second position; the providing of current to the electromagnet at the third position includes: providing the first current to the electromagnet at the third position; the increasing of the current provided to the electromagnet at the second position includes: providing the second current to the electromagnet at the second position; wherein the second current is greater than the first current.

[0009] The control method provided in the third embodiment of the present application also includes: when current is supplied to the electromagnet at the second position, stopping supplying current to the electromagnet at the first position; when current is supplied to the electromagnet at the third position, stopping supplying current to the electromagnets at the first position and the second position.

[0010] In the control method provided in the fourth embodiment of the present application, the magnetic member of the magnetic structure fixed to the box body is an electromagnet, and the magnetic member of the magnetic structure fixed to the box door is a permanent magnet.

[0011] The fifth embodiment of the present application provides a control method for a refrigerator, wherein the refrigerator includes a cabinet, a cabinet door, a hinge assembly and a cabinet door switch detection unit, wherein the cabinet is constructed with at least one storage chamber with an access opening; the cabinet door can move relative to the cabinet to open or close the access opening of the storage chamber; the hinge assembly connects the cabinet and the cabinet door, and includes two layers of magnetic structure, wherein one layer of magnetic structure is fixed to the cabinet, and the other layer of magnetic structure is fixed to the cabinet door, each layer of magnetic structure includes at least three magnetic members arranged at intervals, and the magnetic members of the two layers of magnetic structures correspond to each other to form at least three magnetic member groups, and with the movement of the cabinet door, two magnetic members in the magnetic member group are selectively stacked together, at least one magnetic member in the magnetic member group is an electromagnet, and when powered on, the two magnetic members in the magnetic member group attract each other; the cabinet door switch detection unit is configured to detect the opening and closing of the cabinet door.

[0012] The control method includes: when the position of the electromagnet generating a preset current peak value gradually decreases corresponding to the opening angle of the door, and when the current of the electromagnet at the second position is detected to decrease, current is provided to the electromagnet at the first position, the first position being the position of the magnetic component group in which two magnetic components are stacked together in the hinge assembly when the door is closed, the second position being the position of the magnetic component group in which two magnetic components are stacked together in the hinge assembly when the opening angle of the door is greater than zero, and the second position is adjacent to the first position; if the current of the electromagnet at the first position is not detected to reach the preset current peak within a preset time and the door switch detection unit does not detect that the door is closed, the current provided to the electromagnet at the first position is increased.

[0013] The control method for a refrigerator provided in the sixth embodiment of the present application further includes: when current is supplied to the electromagnet at the first position, stopping supplying current to the electromagnet at the second position.

[0014] In the control method provided in the seventh embodiment of the present application, the magnetic member of the magnetic structure fixed to the box body is an electromagnet, and the magnetic member of the magnetic structure fixed to the box door is a permanent magnet.

[0015] The refrigerator in the eighth embodiment of the present application includes a cabinet, a cabinet door, a hinge assembly, a cabinet door switch detection unit and a control device, wherein the cabinet is constructed with at least one storage chamber with an access opening; the cabinet door can move relative to the cabinet to open or close the access opening of the storage chamber; the hinge assembly connects the cabinet and the cabinet door, and includes two layers of magnetic structure, wherein one layer of magnetic structure is fixed to the cabinet, and the other layer of magnetic structure is fixed to the cabinet door, each layer of magnetic structure includes at least three magnetic members arranged at intervals, and the magnetic members of the two layers of magnetic structures correspond to each other to form at least three magnetic member groups, and with the movement of the cabinet door, two magnetic members in the magnetic member group are selectively stacked together, at least one magnetic member in the magnetic member group is an electromagnet, and when power is turned on, the two magnetic members in the magnetic member group attract each other; the cabinet door switch detection unit is configured to detect the opening and closing of the cabinet door.

[0016] Wherein, the control device is electrically connected to the electromagnet and is configured to execute the aforementioned control method.

[0017] In the refrigerator of the ninth embodiment of the present application, the magnetic structure includes a non-magnetic annular carrier, at least three carrying grooves are constructed in the annular carrier, and each of the carrying grooves accommodates a magnetic member; a convex column is provided on the surface of the box body, and the annular carrier of the magnetic structure fixed to the box body is arranged around the convex column, and the hinge assembly also includes a bearing, which is arranged on the side of the annular carrier of the magnetic structure fixed to the box body away from the surface of the box body and is sleeved on the convex column, and the annular carrier of the magnetic structure fixed to the box door is sleeved on the bearing.

[0018] In the refrigerator of the tenth embodiment of the present application, the control device includes at least three control units, at least three buck-boost conversion circuits and at least three sampling resistors, each of the sampling resistors corresponds to one of the electromagnets, each of the buck-boost conversion circuits corresponds to one of the sampling resistors, and each of the control units corresponds to one of the buck-boost conversion circuits; wherein the control unit has an output port and an input port, the output port is connected to the transistor of the corresponding buck-boost conversion circuit to control the output current of the buck-boost conversion circuit; the input port is connected to the two ends of the corresponding sampling resistor through an amplifier circuit, one end of the sampling resistor is connected to the output end of the corresponding buck-boost conversion circuit, and the other end is connected to the coil of the corresponding electromagnet, and is configured to collect the current of the coil of the corresponding electromagnet.

[0019] The technical solution provided by the embodiments of the present application includes at least the following beneficial effects:

[0020] In the control method of the first embodiment of the present application, when the door switch detection unit detects that the door is opened, current is supplied to the electromagnet at the first position, so that the electromagnet at the first position has a weaker magnetism. If the door continues to be opened, the two magnetic parts of the magnetic part group at the first position are separated, causing the magnetic field strength of the electromagnet at the first position to decay, thereby generating a drop in the induced current, resulting in a current drop. Therefore, when it is detected that the current of the electromagnet at the first position drops, current is supplied to the electromagnet at the second position, so that the electromagnet at the second position has a weaker magnetism. When the two magnetic parts of the magnetic part group at the second position are separated as the door is opened, the electromagnet at the second position is closed. When the components are stacked together, the magnetic field strength of the electromagnet at the second position is enhanced, resulting in an increase in the induced current. Therefore, when it is detected that the electromagnet at the second position generates a preset current peak, current is supplied to the electromagnet at the third position, so that the electromagnet at the third position has a weaker magnetism. If the electromagnet at the third position is not detected to generate a preset current peak within a preset time, it is considered that the box door is not opened to the opening angle corresponding to the electromagnet at the third position, and it is determined that the box door needs to hover at the second position, and the current supplied to the electromagnet at the second position is increased, thereby enhancing the magnetic field strength of the electromagnet at the second position, so that the box door can hover stably.

[0021] In the control method of the third embodiment of the present application, current flows through the electromagnets in only two magnetic parts that are about to be stacked together or are being stacked together, thereby saving energy consumption of the refrigerator.

[0022] In the control method of the fourth embodiment of the present application, when power is turned on, the suction force of the two magnetic members in the magnetic member group is relatively strong, which helps the box door to hover stably.

[0023] In the control method of the fifth embodiment of the present application, when the position of the electromagnet generating a preset current peak value corresponds to a gradually decreasing opening angle of the door, it is considered that the door is closing at this time; if at the same time, a current drop is detected in the electromagnet at the second position, indicating that the door is about to close, and current is supplied to the electromagnet at the first position to make the electromagnet at the first position magnetic; if the door is closed, the two magnetic parts of the magnetic part group at the first position are stacked together, and the magnetic field strength of the electromagnet at the first position is increased, which will cause the current of the electromagnet at the first position to reach a preset current peak; if the current of the electromagnet at the first position is not detected to reach the preset current peak within the preset time, and the door switch detection unit does not detect that the door is closed, it is considered that the door is not closed, and the current supplied to the electromagnet at the first position is increased, thereby enhancing the magnetic field strength of the electromagnet at the first position to ensure that the door can be closed.

[0024] In the control method of the sixth embodiment of the present application, current flows through the electromagnets in only two magnetic parts that are about to be stacked together or are being stacked together, thereby saving energy consumption of the refrigerator.

[0025] In the control method of the seventh embodiment of the present application, when power is turned on, the suction force of the two magnetic members in the magnetic member group is relatively strong, which helps to ensure that the door is tightly closed.

[0026] In the refrigerator in the eighth embodiment of the present application, the hinge assembly is provided with two layers of magnetic structure, each layer of the magnetic structure includes at least three magnetic parts arranged at intervals, and the magnetic parts of the two layers of magnetic structure correspond to each other to form at least three magnetic part groups, and the control method is executed by the control device, so that the cabinet door can be stably hovered, or ensure that the cabinet door can be closed tightly.

[0027] In the refrigerator of the ninth embodiment of the present application, the setting of the bearing can reduce the friction force when the two magnetic structures rotate relative to each other, so that the opening and closing of the door is smoother.

[0028] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the description, are used to explain the principles of the present application.

[0030] Figure 1 A three-dimensional view of the appearance of a refrigerator according to an embodiment of the present application is shown.

[0031] Figure 2 Shows Figure 1 The refrigerator shown is a partial cross-sectional view taken along AA.

[0032] Figure 3 A structural diagram of a hinge assembly according to an embodiment of the present application is shown.

[0033] Figure 4 Shows Figure 3 An exploded view of the hinge assembly is shown.

[0034] Figure 5 Shows Figure 1 A block diagram of the partial structure of a refrigerator shown.

[0035] Figure 6 A partial circuit diagram of a control device according to an embodiment of the present application is shown.

[0036] Figure 7 A flow chart of a control method according to the first embodiment of the present application is shown.

[0037] Figure 8 A schematic diagram showing the position distribution of a magnetic component group of a hinge assembly according to an embodiment of the present application is shown.

[0038] Fig. 9A waveform diagram showing the variation of magnetic field strength with the door opening angle according to an embodiment of the present application is shown.

[0039] Fig.10 A waveform diagram showing the change of the electromagnet coil current with the door opening angle according to an embodiment of the present application is shown.

[0040] Fig.11 A flow chart of a control method according to a second embodiment of the present application is shown.

[0041] The following are the descriptions of the reference numerals:

[0042] 100, refrigerator; 10, cabinet; 11, storage chamber; 12, boss; 20, cabinet door; 30, hinge assembly; 31, first magnetic structure; 311, first magnetic member; 312, first annular bearing member; 3120, first bearing slot; 32, second magnetic structure; 321, second magnetic member; 322, second annular bearing member; 3220, second bearing slot; 33, magnetic member group; 34, bearing; 35, connecting piece; 40, cabinet door switch detection unit; 50, control device; 51, control unit; 52, buck-boost conversion circuit; E1, first energy storage capacitor; C1, first filter capacitor; MOS1, transistor; L1, energy storage inductor; D1, diode; E2, second energy storage capacitor; C2, second filter capacitor; R1, sampling resistor; 53, amplifier circuit. DETAILED DESCRIPTION

[0043] In order to make the purpose, implementation mode and advantages of the present application clearer, the exemplary implementation mode of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0044] It should be noted that the brief description of terms in this application is only for the convenience of understanding the embodiments described below, and is not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their common and usual meanings.

[0045] In addition, the terms "including" and "having" and any variations thereof are intended to cover but not exclude inclusion, for example, a product or device comprising a list of components is not necessarily limited to those components expressly listed but may include other components not expressly listed or inherent to such products or devices.

[0046] In the description of the present application, it should be understood that the terms "inside", "outside", "up", "down", "top", "bottom", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0047] The terms "first", "second", "third", etc., ordinal numbers are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined with ordinal numbers such as "first", "second", "third", etc. may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0048] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0049] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.

[0050] In the related art, refrigerators have the technical problems of loud door opening and closing noise and vibration, the door cannot stably hover at the desired angle, and the door is not tightly closed. The reason is that the cabinet and the door are connected by mechanical hinges, and it is difficult for users to control the force when opening or closing the door. In order to solve the technical problems of using mechanical hinges to connect the cabinet and the door, the industry has made structural improvements to the mechanical hinges, and achieved the deceleration of the opening and closing of the refrigerator door by providing damping, such as integrated springs and other structures to form a buffering effect, thereby reducing the relatively loud noise and vibration caused by improper force of users opening and closing the door and achieving functions such as door hovering. However, this method greatly increases the structural complexity of the mechanical hinge, and still cannot ensure that the door can hover stably, and there is also the problem of the door not being tightly closed.

[0051] In view of this, the refrigerator of the embodiment of the present application has two layers of magnetic structures in the hinge assembly, each layer of the magnetic structure includes at least three magnetic parts arranged at intervals, and the magnetic parts of the two layers of magnetic structures correspond to each other to form at least three magnetic parts groups, and at least one magnetic part in each magnetic part group is an electromagnet. When powered on, the two magnetic parts in the magnetic part group attract each other, and through electromagnetic control, the electric suction of the door is realized to ensure that the door can be closed tightly, the door opening and closing is decelerated to reduce noise, and the door is stably suspended at a desired angle, etc. At the same time, the hinge assembly has a simple structure, and there is no need to change the structure of the cabinet or the door.

[0052] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0053] Figure 1 A three-dimensional view of the appearance of a refrigerator according to an embodiment of the present application is shown.

[0054] like Figure 1 As shown, the refrigerator 100 of the embodiment of the present application includes a body 10 and a door 20.

[0055] The box body 10 is configured with a storage chamber 11 having an access opening, through which food and other items can be taken and placed in the storage chamber 11. Exemplarily, the number of the storage chambers 11 can be one or more, and the multiple storage chambers 11 can be divided into a refrigerating chamber or a freezing chamber.

[0056] The door 20 can move relative to the cabinet 10 to open or close the access opening of the storage chamber 11, so as to open or close the storage chamber 11. By way of example, there can be multiple doors 20. Each storage chamber 11 can be provided with one door 20, or two doors 20, such as a double-door refrigerator, or multiple storage chambers 11 can be provided with one door 20, which is not specifically limited in the embodiment of the present application.

[0057] The door 20 is hinged to the box body 10 and can rotate relative to the box body 10. Exemplarily, the door 20 is connected to the box body 10 through a hinge assembly 30. Exemplarily, the number of hinge assemblies 30 can be one or more. One hinge assembly 30 can be set between each door 20 and the box body 10, and multiple hinge assemblies 30 can also be set. For example, two hinge assemblies 30 are set, one hinge assembly 30 is connected to the top of the door 20 and the box body 10, and the other hinge assembly 30 is connected to the bottom of the door 20 and the box body 10. The number of hinge assemblies 30 can be determined according to the size and weight of the door 20, and the embodiment of the present application does not specifically limit this.

[0058] Figure 2 Shows Figure 1 The partial cross-sectional view of the refrigerator shown is taken along AA. Figure 3 A structural diagram of a hinge assembly according to an embodiment of the present application is shown. Figure 4 Shows Figure 3 An exploded view of the hinge assembly is shown.

[0059] like Figure 1 and Figure 2 As shown, the hinge assembly 30 of the embodiment of the present application includes two layers of magnetic structures, one of which is fixed to the box body 10, and the other is fixed to the box door 20. The two layers of magnetic structures can rotate relative to each other, so that the box door 20 can rotate relative to the box body 10. For the convenience of description, the layer of magnetic structure fixed to the box body 10 is named the first magnetic structure 31, and the layer of magnetic structure fixed to the box door 20 is named the second magnetic structure 32.

[0060] Each layer of magnetic structure includes at least three magnetic members arranged at intervals. Figure 4 As shown, the first magnetic structure 31 includes at least three first magnetic members 311, the second magnetic structure 32 includes at least three second magnetic members 321, and the first magnetic members 311 of the first magnetic structure 31 correspond to the second magnetic members 321 of the second magnetic structure 32 one by one, forming at least three magnetic member groups 33. That is, each first magnetic member 311 corresponds to a second magnetic member 321, and forms a magnetic member group 33.

[0061] The first magnetic structure 31 includes at least three first magnetic members 311, or may include only three first magnetic members 311. Similarly, the second magnetic structure 32 includes three second magnetic members 321, and in this case, three magnetic member groups 33 are formed. The first magnetic structure 31 includes at least three first magnetic members 311, or may include more than three first magnetic members 311. Similarly, the second magnetic structure 32 includes the same number of second magnetic members 321, and in this case, more than three magnetic member groups 33 are formed. Exemplarily, the first magnetic structure 31 includes eight first magnetic members 311, and similarly, the second magnetic structure 32 includes eight second magnetic members 321, and in this case, eight magnetic member groups 33 are formed. Exemplarily, the first magnetic structure 31 includes ten first magnetic members 311, and similarly, the second magnetic structure 32 includes ten second magnetic members 321, and in this case, ten magnetic member groups 33 are formed. Exemplarily, the first magnetic structure 31 includes twelve first magnetic members 311 , and similarly, the second magnetic structure 32 includes twelve second magnetic members 321 , thereby constituting twelve magnetic member groups 33 .

[0062] The plurality of first magnetic members 311 are arranged at equal intervals and form a ring. The angle between two adjacent first magnetic members 311 is 360° / N, where N is an integer greater than or equal to 3. Similarly, the plurality of second magnetic members 321 are arranged at equal intervals and form a ring. The angle between two adjacent second magnetic members 321 is 360° / N, where N is an integer greater than or equal to 3.

[0063] With the movement of the door 20, that is, with the relative rotation of the two layers of magnetic structures, the first magnetic member 311 and the second magnetic member 321 in the magnetic member group 33 are selectively stacked together, or selectively separated. At least one magnetic member in the magnetic member group 33 is an electromagnet, for example, the first magnetic member 311 is an electromagnet, or the second magnetic member 321 is an electromagnet, or both the first magnetic member 311 and the second magnetic member 321 are electromagnets. As long as the first magnetic member 311 and the second magnetic member 321 in the magnetic member group 33 are attracted to each other when power is turned on, it is sufficient.

[0064] Exemplarily, the first magnetic member 311 is an electromagnet, and the second magnetic member 321 is a permanent magnet. When the first magnetic member 311 is energized, the second magnetic member 321 has the opposite polarity to the first magnetic member 311, so that the first magnetic member 311 and the second magnetic member 321 in the magnetic member group 33 are attracted to each other. The electromagnet needs to lead out a wiring harness to connect to the power supply. The first magnetic member 311 fixed to the box body 10 that does not need to be rotated is set as an electromagnet, and the second magnetic member 321 fixed to the box door 20 that needs to be rotated when the box door is opened and closed is set as a permanent magnet, which can avoid affecting the service life of the hinge assembly 30 due to the pulling of the wiring harness when the box door is opened and closed. Of course, it can also be set that the first magnetic member 311 is a permanent magnet and the second magnetic member 321 is an electromagnet.

[0065] One of the first magnetic member 311 and the second magnetic member 321 is an electromagnet, and the other is a permanent magnet. When powered on, the attraction between the first magnetic member 311 and the second magnetic member 321 is strong, which helps the box door 20 to hover stably and ensure that the box door 20 is closed tightly. Of course, the permanent magnet can also be replaced by other magnetic members as long as it can be attracted to the electromagnet when powered on. For example, the first magnetic member 311 is an electromagnet and the second magnetic member 321 is an iron block; or the first magnetic member 311 is an iron block and the second magnetic member 321 is an electromagnet, etc.

[0066] In one embodiment, the magnetic structure further includes a non-magnetic annular support member, through which the magnetic member is received. The annular support member is provided with at least three support slots, each of which contains a magnetic member. Figure 4As shown, the first magnetic structure 31 includes a non-magnetic first annular bearing member 312, and at least three first bearing grooves 3120 are configured in the first annular bearing member 312, and each first bearing groove 3120 accommodates a first magnetic member 311. Similarly, the second magnetic structure 32 includes a non-magnetic second annular bearing member 322, and at least three second bearing grooves 3220 are configured in the second annular bearing member 322, and each second bearing groove 3220 accommodates a second magnetic member 321.

[0067] For example, eight first bearing slots 3120 are configured in the first annular bearing member 312, and each first bearing slot 3120 accommodates a first magnetic member 311; similarly, eight second bearing slots 3220 are configured in the second annular bearing member 322, and each second bearing slot 3220 accommodates a second magnetic member 321. That is, the hinge assembly 30 has eight magnetic member groups 33.

[0068] Among them, the first bearing groove 3120 can be a through groove passing through the opposite two sides of the first annular bearing member 312, or it can be a blind groove passing through only one side of the first annular bearing member 312; similarly, the second bearing groove 3220 can be a through groove passing through the opposite two sides of the second annular bearing member 322, or it can be a blind groove passing through only one side of the second annular bearing member 322.

[0069] The non-magnetic annular bearing member may be an annular bearing member made of stainless steel, or an annular bearing member made of high-strength aluminum alloy, etc.

[0070] like Figure 2 and Figure 4 As shown, a protruding column 12 is disposed on the surface of the box body 10, and a first annular bearing member 312 is disposed around the protruding column 12. The hinge assembly 30 further includes a bearing 34, which is disposed on the side of the first annular bearing member 312 away from the surface of the box body 10 and sleeved on the protruding column 12, and the second annular bearing member 322 sleeved on the bearing 34. The provision of the bearing 34 can reduce the friction force when the second magnetic structure 32 rotates relative to the first magnetic structure 31.

[0071] In addition, the hinge assembly 30 further includes a connecting piece 35. The first annular bearing member 312 of the first magnetic structure 31 is fixed to the surface of the box body 10, the second magnetic structure 32 is arranged on the side of the first magnetic structure 31 away from the box body 10, and is vertically opposite to the first magnetic structure 31, and the second annular bearing member 322 of the second magnetic structure 32 is fixed to the box door 20 via the connecting piece 35.

[0072] The refrigerator of the embodiment of the present application may further include a refrigeration system, which is installed in the box body 10 and is used to cool the storage room 11. The refrigeration system includes a compressor, a condenser, an evaporator, a capillary tube, etc. The compressor is loaded with a refrigerant, and the compressor, the condenser, the capillary tube, and the evaporator are sequentially connected to form a refrigerant circuit for the circulation of the refrigerant.

[0073] The compressor is the power source of the refrigeration system, which can drive the refrigerant in the refrigeration system to transfer and exchange heat. The low-pressure gaseous refrigerant is compressed into a high-temperature and high-pressure superheated gas in the compressor and then discharged into the condenser. Then the high-temperature and high-pressure superheated gas dissipates heat through the condenser, and the temperature continues to drop. It is gradually cooled into a high-temperature and high-pressure saturated steam, and further cooled into a saturated liquid. The saturated liquid flows into the capillary tube, and the capillary tube is throttled and depressurized, and the refrigerant becomes a gas at room temperature and low pressure. The refrigerant gas at room temperature and low pressure begins to absorb heat and vaporize in the evaporator, which not only reduces the temperature of the evaporator and the surrounding area, causing the evaporator to produce low-temperature cold air, but also turns the refrigerant into a low-temperature and low-pressure gas. The refrigerant coming out of the evaporator returns to the compressor again, and the above process is repeated to transfer the heat in the storage chamber 11 to the air outside the box body 10, thereby realizing the refrigeration of the storage chamber 11.

[0074] Figure 5 Shows Figure 1 A block diagram of the partial structure of a refrigerator shown.

[0075] like Figure 5 As shown, the refrigerator of the embodiment of the present application may further include a door switch detection unit 40, which is configured to detect the opening and closing of the door 20. The specific configuration of the door switch detection unit 40 may refer to the prior art and will not be described in detail here.

[0076] like Figure 5 As shown, the refrigerator of the embodiment of the present application may also include a control device 50, which may be connected to the various components of the refrigeration system in communication, and may send control signals to the various components in the refrigeration system to control the various components in the refrigeration system. The control device 50 may be connected to the coil of the electromagnet, and may control the current provided to the electromagnet at a specific position in the hinge assembly 30, and control the magnitude of the current provided to the electromagnet, so as to control the magnitude of the suction force between the electromagnet and the permanent magnet in the magnetic component group 33. The control device 50 may also be connected to the door switch detection unit 40 in communication, and may receive the door switch signal fed back by the door switch detection unit 40, so as to control the current provided to the electromagnet in the hinge assembly 30 according to the door switch signal fed back by the door switch detection unit 40.

[0077] Figure 6 A partial circuit diagram of a control device according to an embodiment of the present application is shown.

[0078] Corresponding to the number of magnetic component groups 33, as Figure 6 As shown, the control device 50 includes at least three control units 51, at least three buck-boost conversion circuits 52, and at least three sampling resistors R1, each sampling resistor R1 corresponds to an electromagnet, each buck-boost conversion circuit 52 corresponds to a sampling resistor R1, and each control unit 51 corresponds to a buck-boost conversion circuit 52. That is, one control unit 51, one buck-boost conversion circuit 52, one sampling resistor R1, and one electromagnet correspond to each other, and the control unit 51 collects the current of the coil of the corresponding electromagnet through the corresponding sampling resistor R1, and controls the output current of the corresponding buck-boost conversion circuit 52 according to the current of the coil of the corresponding electromagnet, so as to control the current provided to the coil of the corresponding electromagnet.

[0079] Exemplarily, the number of magnetic component groups 33 is eight, and correspondingly, the control device 50 includes eight control units 51, eight buck-boost conversion circuits 52, and eight sampling resistors R1. In the embodiment where the first magnetic component 311 is an electromagnet, one control unit 51, one buck-boost conversion circuit 52, one sampling resistor R1, and one first magnetic component 311 correspond to each other, and the control unit 51 collects the current of the coil of the corresponding first magnetic component 311 through a corresponding sampling resistor R1, and controls the output current of the corresponding buck-boost conversion circuit 52 according to the current of the coil of the corresponding first magnetic component 311, so as to control the current provided to the coil of the corresponding first magnetic component 311.

[0080] like Figure 6 As shown, the buck-boost conversion circuit 52 includes a first energy storage capacitor E1, a first filter capacitor C1, a transistor MOS1, an energy storage inductor L1, a diode D1, a second energy storage capacitor E2 and a second filter capacitor C2. The first energy storage capacitor E1 is connected between the power supply VCC and the ground terminal PGN D, the first filter capacitor C1 is connected in parallel with the first energy storage capacitor E1, the control end of the transistor MOS1 is connected to the control unit 51, the first end is connected to the power supply VCC, the second end is connected to the first end of the energy storage inductor L1, the second end of the energy storage inductor L1 is connected to the ground terminal PGND, the cathode of the diode D1 is connected to the first end of the energy storage inductor L1, the anode of the diode D1 is used as the output end of the buck-boost conversion circuit 52, and is connected to the first end of the corresponding sampling resistor R1, the second energy storage capacitor E2 is connected between the anode of the diode D1 and the ground terminal PGND, the second filter capacitor C2 is connected in parallel with the second energy storage capacitor E2, the second end of the sampling resistor R1 is connected to one end of the coil of the corresponding first magnetic member 311, and the other end of the coil of the corresponding first magnetic member 311 is connected to the ground terminal PGND.

[0081] The control unit 51 has an output port G_DRIVE and an input port ISEN_MCU. The output port G_DRIVE is connected to the control end of the transistor MOS1 to control the output current of the buck-boost converter circuit 52. The input port ISEN_MCU is connected to the two ends of the corresponding sampling resistor R1 through the amplifier circuit 53, and is configured to collect the current of the coil of the corresponding first magnetic member 311.

[0082] Among them, the first energy storage capacitor E1 is used as the power input energy storage capacitor, the first filter capacitor C1 is used as the power input filter capacitor, the second energy storage capacitor E2 is used as the power output energy storage capacitor, the second filter capacitor C2 is used as the power output filter capacitor, the transistor MOS1 controls the output of the buck-boost converter circuit 52, and the diode D1 is used for reverse freewheeling. When the transistor MOS1 is turned on, the first energy storage capacitor E1 and the energy storage inductor L1 store energy, and the output is maintained by the discharge of the second energy storage capacitor E2; when the transistor MOS1 is turned off, the energy storage inductor L1 discharges, and the second energy storage capacitor E2 stores energy. After passing through the sampling resistor R1, the current is converted into a small voltage signal, and after passing through the amplification circuit 53, it enters the input port ISEN_MCU of the control unit 51. After calculation and processing, the control unit 51 drives the transistor MOS1 through the output port G_DRIVE to control the current passing through the coil of the first magnetic part 311, thereby controlling the magnetic force of the first magnetic part 311. Among them, the larger the current passing through the coil of the first magnetic part 311, the stronger the magnetic field, and the greater the magnetic force of the first magnetic part 311.

[0083] The control device 50 is configured to execute the control method of the embodiment of the present application, which provides current to the electromagnet at a first position when the door switch detection unit detects that the door is open, the first position being the position of the magnetic component group where two magnetic components are stacked together in the hinge assembly when the door is closed; when the current drop of the electromagnet at the first position is detected, current is provided to the electromagnet at the second position, the second position being the position of the magnetic component group where two magnetic components are stacked together in the hinge assembly when the door opening angle is greater than zero, and the second position is adjacent to the first position; when the electromagnet at the second position is detected to generate a preset current peak, current is provided to the electromagnet at a third position, the third position being the position of the magnetic component group where two magnetic components are stacked together in the hinge assembly when the door opening angle is greater than zero, and the door opening angle corresponding to the third position is greater than the door opening angle corresponding to the second position, and the third position is adjacent to the second position; if the electromagnet at the third position is not detected to generate a preset current peak within the preset time, the current provided to the electromagnet at the second position is increased. Also, when the position of the electromagnet generating a preset current peak value corresponds to a gradually decreasing opening angle of the door, and when the current of the electromagnet at the second position is detected to decrease, current is supplied to the electromagnet at the first position, the first position being the position of the magnetic component group where two magnetic components are stacked together in the hinge assembly when the door is closed, the second position being the position of the magnetic component group where two magnetic components are stacked together in the hinge assembly when the opening angle of the door is greater than zero, and the second position is adjacent to the first position; if the current of the electromagnet at the first position is not detected to reach the preset current peak within a preset time and the door switch detection unit does not detect that the door is closed, the current supplied to the electromagnet at the first position is increased.

[0084] Figure 7 FIG. 1 is a flow chart showing a control method according to a first embodiment of the present invention. Figure 7 As shown, the control method at least includes steps S710 to S790, which are described in detail as follows:

[0085] In step S710, the door switch detection unit detects whether the door is open. If so, the process proceeds to step S720.

[0086] In step S720, current is supplied to the electromagnet at the first position. Then, the process proceeds to step S730.

[0087] The first position is the position of the magnetic component group where the two magnetic components are stacked together in the hinge assembly when the door is closed.

[0088] In step S730, it is detected whether the current of the electromagnet at the first position decreases, and if so, the process proceeds to step S740.

[0089] In step S740, current is supplied to the electromagnet at the second position, and then the process proceeds to step S750.

[0090] The second position is the position of the magnetic component group where the two magnetic components are stacked together in the hinge assembly when the opening angle of the door is greater than zero, and the second position is adjacent to the first position.

[0091] In step S750, it is detected whether the electromagnet at the second position generates a preset current peak value, and if so, the process proceeds to step S760.

[0092] In step S760, current is supplied to the electromagnet at the third position, and then the process proceeds to step S770.

[0093] Among them, the third position is the position of the magnetic component group where the two magnetic components are stacked together in the hinge assembly when the door opening angle is greater than zero, and the door opening angle corresponding to the third position is greater than the door opening angle corresponding to the second position, and the third position is adjacent to the second position.

[0094] In step S770, it is detected whether the electromagnet at the third position generates a preset current peak value, if not, the process proceeds to step S780.

[0095] In step S780, a preset time is counted, and then the process proceeds to step S790.

[0096] That is, if it is not detected that the electromagnet at the third position generates a preset current peak value within the preset time, the process goes to step S790.

[0097] Exemplarily, the preset time may be 1 s, 2 s, etc.

[0098] In step S790, the current supplied to the electromagnet of the second position is increased.

[0099] In this embodiment, when the door switch detection unit detects that the door is opened, current is supplied to the electromagnet at the first position, so that the electromagnet at the first position has a weaker magnetism. If the door continues to be opened, the two magnetic parts of the magnetic part group at the first position are separated, that is, the two magnetic parts of the magnetic part group at the first position are no longer exactly stacked together, which causes the magnetic field strength of the electromagnet at the first position to decay, thereby generating a drop in the induced current, resulting in a current drop. Therefore, when it is detected that the current of the electromagnet at the first position drops, current is supplied to the electromagnet at the second position, so that the electromagnet at the second position has a weaker magnetism. When the door is opened, the two magnetic parts of the magnetic part group at the first position are separated, that is, the two magnetic parts of the magnetic part group at the first position are no longer exactly stacked together. This causes the magnetic field strength of the electromagnet at the first position to decay, thereby generating a drop in the induced current, resulting in a current drop. Therefore, when it is detected that the current of the electromagnet at the first position drops, current is supplied to the electromagnet at the second position, so that the electromagnet at the second position has a weaker magnetism. When two magnetic parts of the magnetic part group are stacked together, the magnetic field strength of the electromagnet at the second position is enhanced, resulting in an increase in the induced current. Therefore, when it is detected that the electromagnet at the second position generates a preset current peak, current is supplied to the electromagnet at the third position, so that the electromagnet at the third position has a weaker magnetism. If the electromagnet at the third position is not detected to generate a preset current peak within a preset time, it is considered that the box door is not opened to the opening angle corresponding to the electromagnet at the third position, and it is determined that the box door needs to hover at the second position. The current supplied to the electromagnet at the second position is increased, thereby enhancing the magnetic field strength of the electromagnet at the second position, so that the box door can hover stably.

[0100] In an exemplary embodiment, in step S720, current is provided to the electromagnet at the first position, specifically, a first current is provided to the electromagnet at the first position; in step S740, current is provided to the electromagnet at the second position, specifically, a first current is provided to the electromagnet at the second position; in step S760, current is provided to the electromagnet at the third position, specifically, a first current is provided to the electromagnet at the third position; in step S790, current provided to the electromagnet at the second position is increased, specifically, a second current is provided to the electromagnet at the second position; wherein the second current is greater than the first current.

[0101] That is, the same weak current is provided in step S720, step S740, and step S760. Of course, in other embodiments, the weak currents provided in step S720, step S740, and step S760 may be different. For example, in step S720, a first current is provided to the electromagnet at the first position, in step S740, a second current is provided to the electromagnet at the second position, in step S760, a third current is provided to the electromagnet at the third position, and in step S790, a fourth current is provided to the electromagnet at the second position; wherein the first current, the second current, and the third current are different in magnitude and are all smaller than the fourth current.

[0102] In an exemplary embodiment, when current is supplied to the electromagnet at the second position, current is stopped from being supplied to the electromagnet at the first position. That is, in step S740, current is supplied to the electromagnet at the second position, and current is stopped from being supplied to the electromagnet at the first position. When current is supplied to the electromagnet at the third position, current is stopped from being supplied to the electromagnets at the first position and the second position. That is, in step S760, current is supplied to the electromagnet at the third position, and current is stopped from being supplied to the electromagnet at the second position. In this way, only the electromagnets in the magnetic component group where two magnetic components are about to be stacked together or are being stacked together have current flowing through them, which can save energy consumption of the refrigerator.

[0103] also, Figure 7 The embodiment in which the door of the box is hovering at the second position is only one of the exemplary embodiments of the present application. When each layer of the magnetic structure includes more than four magnetic parts, the door of the box may also need to hover at other positions, for example, at the third position. At this time, if it is detected in step S770 that the electromagnet at the third position generates a preset current peak, then further execution is performed: providing current to the electromagnet at the fourth position, and detecting whether the electromagnet at the fourth position generates a preset current peak. If not, timing a preset time. If the electromagnet at the fourth position is not detected to generate a preset current peak within the preset time, it is considered that the door of the box needs to hover at the third position, and the current provided to the electromagnet at the third position is increased. Among them, the fourth position is the position of the magnetic part group where the two magnetic parts are stacked together in the hinge assembly when the door opening angle is greater than zero, and the door opening angle corresponding to the fourth position is greater than the door opening angle corresponding to the third position, and the fourth position is adjacent to the third position.

[0104] Below, taking the hinge assembly including eight magnetic component groups and the door needing to hover at position B as an example, the control method of the present application is explained.

[0105] like Figure 8 As shown, the hinge assembly includes magnetic component groups located at multiple positions such as position A, position B, position C, and position D. When the door is closed, the two magnetic components of the magnetic component group at position A are stacked together; when the door is opened at an angle of 45°, the two magnetic components of the magnetic component group at position B are stacked together; when the door is opened at an angle of 90°, the two magnetic components of the magnetic component group at position C are stacked together; when the door is opened at an angle of 135°, the two magnetic components of the magnetic component group at position D are stacked together; when the door is opened at an angle of 180°, the two magnetic components of the magnetic component group at position A are stacked together; and so on.

[0106] When the door is opened, the control device detects the door opening through the door switch detection unit, and then the hinge assembly starts working. The control device first provides a weak first current to the electromagnet of the magnetic component group at position A, so that the electromagnet of the magnetic component group at position A has a weak magnetism. When the door continues to open, the permanent magnet of the magnetic component group at position A leaves the relative vertical position of the electromagnet, resulting in a decay of the magnetic field strength of the electromagnet of the magnetic component group at position A, such as Fig. 9 As shown in the waveform marked as leaving, the coil of the electromagnet produces a drop in the induced current, such as Fig.10 The drop waveform marked in the figure, at this time, the input port ISEN_MCU of the control unit corresponding to the electromagnet of the magnetic component group at position A in the control device will detect the current fluctuation. When the electromagnet and the permanent magnet of the magnetic component group at position A are completely separated, the magnetic field strength of the electromagnet will be relatively stable, such as Fig. 9 At this time, a weaker first current is supplied to the electromagnet of the magnetic component group at position B, so that the electromagnet of the magnetic component group at position B has a weaker magnetism, and the first current is stopped from being supplied to the electromagnet of the magnetic component group at position A. When the door opening angle reaches 45°, the permanent magnet and the electromagnet of the magnetic component group at position B are stacked together, and the magnetic field strength of the electromagnet of the magnetic component group at position B will change due to the superposition of the permanent magnet magnetic field, such as Fig. 9 In the waveform marked with contact, at the same time, the current of the electromagnet of the magnetic component group at position B will have a peak due to the change in magnetic field strength, that is, a preset current peak value is generated, such as Fig.10 At this time, the input port ISEN_MCU of the control unit corresponding to the electromagnet of the magnetic component group at position B in the control device will detect the current fluctuation. Then, a weaker first current is provided to the electromagnet of the magnetic component group at position C, so that the electromagnet of the magnetic component group at position C has a weaker magnetism, and the first current is stopped from being provided to the electromagnet of the magnetic component group at position B. When the door opening angle reaches 90°, the permanent magnet of the magnetic component group at position C will be stacked with the electromagnet, and the electromagnet of the magnetic component group at position C will generate a preset current peak value. If the input port ISEN_MCU of the control unit corresponding to the electromagnet of the magnetic component group at position C in the control device does not detect the preset current peak value within 1S, it is considered that the door needs to hover at position B (door opening angle 45°). Then, the control unit corresponding to the electromagnet of the magnetic component group at position B in the control device controls the output port G_DRIVE to drive transistor MOS1 to increase the duty cycle or frequency of transistor MOS1, thereby increasing the current provided to the electromagnet of the magnetic component group at position B, increasing the magnetic field strength of the electromagnet of the magnetic component group at position B, and enhancing the suction force of the permanent magnet and electromagnet of the magnetic component group at position B, thereby achieving the effect of making the box door hover stably.

[0107] Fig.11 FIG. 2 is a flow chart showing a control method according to a second embodiment of the present application. Fig.11 As shown, the control method at least includes steps S1110 to S1170, which are described in detail as follows:

[0108] In step S1110, it is determined whether the door opening angle corresponding to the position of the electromagnet generating the preset current peak is gradually decreasing. If so, the process proceeds to step S1120.

[0109] In step S1120, it is detected whether the current of the electromagnet at the second position decreases, and if so, the process proceeds to step S1130.

[0110] In step S1130, current is supplied to the electromagnet at the first position, and then the process proceeds to step S1140.

[0111] Among them, the first position is the position of the magnetic component group where the two magnetic components are stacked together in the hinge assembly when the door is closed, and the second position is the position of the magnetic component group where the two magnetic components are stacked together in the hinge assembly when the door opening angle is greater than zero, and the second position is adjacent to the first position.

[0112] In step S1140, it is detected whether the electromagnet current at the first position reaches a preset current peak value, if not, the process goes to step S1150.

[0113] In step S1150, a preset time is counted, and then the process proceeds to step S1160.

[0114] Exemplarily, the preset time may be 1 s, 2 s, etc.

[0115] In step S1160, the door switch detection unit detects whether the door is closed, if not, proceeds to step S1170.

[0116] In step S1170, the current supplied to the electromagnet of the first position is increased.

[0117] In this embodiment, when the position of the electromagnet generating a preset current peak value corresponds to a gradually decreasing opening angle of the door, it is considered that the door is closing at this time; if at the same time, a current drop in the electromagnet at the second position is detected, indicating that the door is about to close, current is supplied to the electromagnet at the first position to make the electromagnet at the first position magnetic; if the door is closed, the two magnetic parts of the magnetic part group at the first position are stacked together, and the magnetic field strength of the electromagnet at the first position is increased, which will cause the current of the electromagnet at the first position to reach a preset current peak; if the current of the electromagnet at the first position is not detected to reach the preset current peak within a preset time, and the door switch detection unit does not detect that the door is closed, it is considered that the door is not closed, and the current supplied to the electromagnet at the first position is increased, thereby enhancing the magnetic field strength of the electromagnet at the first position to ensure that the door can be closed.

[0118] In an exemplary embodiment, when current is supplied to the electromagnet at the first position, current is stopped from being supplied to the electromagnet at the second position. That is, in step S1130, current is supplied to the electromagnet at the first position, and current is stopped from being supplied to the electromagnet at the second position. In this way, current flows only to the electromagnets in the magnetic component group where two magnetic components are about to be stacked together or are being stacked together, thereby saving energy consumption of the refrigerator.

[0119] Next, combine Figures 8 to 10 , the control method of the present application is described.

[0120] When the user closes the door, the control device will detect that the current peak moves from the position where the door is opened at a larger angle, such as position B, position C, and position D, to the position where the door is opened at a smaller angle, such as position A, position B, and position C. For example, when the door is currently hovering at position C, the coil current of the electromagnet of the magnetic component group at position C is in a high current state, and a large suction force is generated with the corresponding permanent magnet. When the user closes the door, the magnetic component group at position C has a relative vertical position where the permanent magnet leaves the electromagnet, and the magnetic field strength of the electromagnet will decay, such as Fig. 9 As shown in the waveform marked as leaving, the coil of the electromagnet produces a drop in the induced current, such as Fig.10 At this time, the input port ISEN_MCU of the control unit corresponding to the electromagnet of the magnetic component group at position C in the control device will detect the current fluctuation. Then, the current is stopped from being supplied to the electromagnet of the magnetic component group at position C, and the current is supplied to the electromagnet of the magnetic component group at position B. When the electromagnet of the magnetic component group at position B is stacked with the permanent magnet, the following will be generated: Fig. 9 The waveform of the change in magnetic field strength of the contact is marked. At the same time, the current of the electromagnet of the magnetic component group at position B will have a peak due to the change in magnetic field strength, that is, a preset current peak value is generated, such as Fig.10 When the door continues to close, the permanent magnet of the magnetic component group at position B leaves the relative vertical position of the electromagnet, and the magnetic field strength of the electromagnet will decay, such as Fig. 9 As shown in the waveform marked as leaving, the coil of the electromagnet produces a drop in the induced current, such as Fig.10The drop waveform marked in the figure determines that the closing angle of the door has been reduced to 45°. Stop supplying current to the electromagnet of the magnetic component group at position B, and supply current to the electromagnet of the magnetic component group at position A at the same time. When the door is closed (the opening angle is zero), the permanent magnet of the magnetic component group at position A will be stacked with the electromagnet, and the electromagnet of the magnetic component group at position A will generate a preset current peak. If the input port ISEN_MCU of the control unit corresponding to the electromagnet of the magnetic component group at position A in the control device does not detect the preset current peak within 1S, and the door switch detection unit does not detect that the door is closed, it is determined that the door is not closed tightly, and then the control unit corresponding to the electromagnet of the magnetic component group at position A in the control device controls the output port G_DRIVE to drive transistor MOS1, increase the duty cycle or frequency of transistor MOS1, thereby increasing the current provided to the electromagnet of the magnetic component group at position A, increase the magnetic field strength of the electromagnet of the magnetic component group at position A, and enhance the suction force of the permanent magnet and electromagnet of the magnetic component group at position A, thereby achieving the effect of ensuring that the door is closed tightly. On the contrary, if the input port ISEN_MCU of the control unit corresponding to the electromagnet of the magnetic component group at position A in the control device detects the preset current peak within 1S, and the door switch detection unit detects that the door is closed, it is determined that the door is closed and the control program ends.

[0121] In addition, since the magnetic field is continuously added during the process of opening the door, if the user opens the door forcefully, the hinge assembly can help slow down the door and achieve a buffering effect, thus avoiding loud noises and vibrations caused by improper force when the user opens and closes the door.

[0122] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the scope of the present application is limited only by the attached claims.

Claims

1. A control method for a refrigerator, characterized in that: The refrigerator comprises: The box body is constructed with at least one storage chamber having a take-in and put-out opening; A box door, movable relative to the box body, for opening or closing the access opening of the storage chamber; A hinge assembly connects the box body and the box door, comprising two layers of magnetic structures, wherein one layer of the magnetic structure is fixed to the box body, and the other layer of the magnetic structure is fixed to the box door, each layer of the magnetic structure comprises at least three magnetic members arranged at intervals, the magnetic members of the two layers of the magnetic structure correspond to each other to form at least three magnetic member groups, and with the movement of the box door, two magnetic members in the magnetic member group are selectively stacked together, at least one magnetic member in the magnetic member group is an electromagnet, and when power is turned on, the two magnetic members in the magnetic member group attract each other; A door switch detection unit, configured to detect the opening and closing of the door; The control method comprises: When the door switch detection unit detects that the door is open, current is supplied to the electromagnet at the first position, where the first position is the position of the magnetic member group in the hinge assembly where two magnetic members are stacked together when the door is closed; When it is detected that the current of the electromagnet at the first position decreases, current is supplied to the electromagnet at the second position, the second position being the position of the magnetic member group where two magnetic members are stacked together in the hinge assembly when the opening angle of the door is greater than zero, and the second position is adjacent to the first position; When it is detected that the electromagnet at the second position generates a preset current peak, current is provided to the electromagnet at the third position, the third position being the position of the magnetic member group where two magnetic members are stacked together in the hinge assembly when the door opening angle is greater than zero, and the door opening angle corresponding to the third position is greater than the door opening angle corresponding to the second position, and the third position is adjacent to the second position; If the electromagnet at the third position is not detected to generate a preset current peak within a preset time, the current provided to the electromagnet at the second position is increased.

2. The control method according to claim 1, characterized in that: The providing current to the electromagnet at the first position comprises: providing a first current to the electromagnet at the first position; The providing current to the electromagnet at the second position includes: providing the first current to the electromagnet at the second position; The providing current to the electromagnet at the third position comprises: providing the first current to the electromagnet at the third position; The increasing the current provided to the electromagnet at the second position includes: providing a second current to the electromagnet at the second position; Wherein, the second current is greater than the first current.

3. The control method according to claim 1, characterized in that: The control method further comprises: When current is supplied to the electromagnet at the second position, supplying current to the electromagnet at the first position is stopped; When current is supplied to the electromagnet at the third position, supply of current to the electromagnets at the first position and the second position is stopped.

4. The control method according to any one of claims 1 to 3, characterized in that: The magnetic part of the magnetic structure fixed to the box body is an electromagnet, and the magnetic part of the magnetic structure fixed to the box door is a permanent magnet.

5. A control method for a refrigerator, characterized in that: The refrigerator comprises: The box body is constructed with at least one storage chamber having a take-in and put-out opening; A box door, movable relative to the box body, for opening or closing the access opening of the storage chamber; A hinge assembly connects the box body and the box door, comprising two layers of magnetic structures, wherein one layer of the magnetic structure is fixed to the box body, and the other layer of the magnetic structure is fixed to the box door, each layer of the magnetic structure comprises at least three magnetic members arranged at intervals, the magnetic members of the two layers of the magnetic structure correspondingly constitute at least three magnetic member groups, and with the movement of the box door, two magnetic members in the magnetic member group are selectively stacked together, at least one magnetic member in the magnetic member group is an electromagnet, and when power is turned on, the two magnetic members in the magnetic member group attract each other; A door switch detection unit, configured to detect the opening and closing of the door; The control method comprises: When the position of the electromagnet generating the preset current peak value corresponds to the gradually decreasing opening angle of the door, and when the current of the electromagnet at the second position is detected to decrease, current is provided to the electromagnet at the first position, the first position is the position of the magnetic member group where two magnetic members are stacked together in the hinge assembly when the door is closed, the second position is the position of the magnetic member group where two magnetic members are stacked together in the hinge assembly when the opening angle of the door is greater than zero, and the second position is adjacent to the first position; If the current of the electromagnet at the first position is not detected to reach a preset current peak value within a preset time and the door switch detection unit does not detect that the door is closed, the current provided to the electromagnet at the first position is increased.

6. The control method according to claim 5, characterized in that: The control method further comprises: When current is supplied to the electromagnet at the first position, supply of current to the electromagnet at the second position is stopped.

7. The control method according to claim 5 or 6, characterized in that: The magnetic component of the magnetic structure fixed to the box body is an electromagnet, and the magnetic component of the magnetic structure fixed to the box door is a permanent magnet.

8. A refrigerator, characterized in that: The refrigerator comprises: The box body is constructed with at least one storage chamber having a take-in and put-out opening; A box door, movable relative to the box body, for opening or closing the access opening of the storage chamber; A hinge assembly connects the box body and the box door, comprising two layers of magnetic structures, wherein one layer of the magnetic structure is fixed to the box body, and the other layer of the magnetic structure is fixed to the box door, each layer of the magnetic structure comprises at least three magnetic members arranged at intervals, the magnetic members of the two layers of the magnetic structure correspondingly constitute at least three magnetic member groups, and with the movement of the box door, two magnetic members in the magnetic member group are selectively stacked together, at least one magnetic member in the magnetic member group is an electromagnet, and when power is turned on, the two magnetic members in the magnetic member group attract each other; A door switch detection unit, configured to detect the opening and closing of the door; A control device, electrically connected to the electromagnet, is configured to execute the control method according to any one of claims 1 to 7.

9. The refrigerator according to claim 8, characterized in that: The magnetic structure includes a non-magnetic annular carrier, which has at least three bearing grooves constructed therein, and each of the bearing grooves accommodates a magnetic member; a convex column is provided on the surface of the box body, and the annular carrier of the magnetic structure fixed to the box body is arranged around the convex column; the hinge assembly also includes a bearing, which is arranged on the side of the annular carrier of the magnetic structure fixed to the box body away from the surface of the box body and is sleeved on the convex column, and the annular carrier of the magnetic structure fixed to the box door is sleeved on the bearing.

10. The refrigerator according to claim 8, characterized in that: The control device comprises at least three control units, at least three buck-boost conversion circuits and at least three sampling resistors, each sampling resistor corresponds to one electromagnet, each buck-boost conversion circuit corresponds to one sampling resistor, and each control unit corresponds to one buck-boost conversion circuit; Wherein, the control unit has: An output port connected to a corresponding transistor of the buck-boost converter circuit to control an output current of the buck-boost converter circuit; The input port is connected to the two ends of the corresponding sampling resistor through an amplifier circuit, one end of the sampling resistor is connected to the output end of the corresponding buck-boost conversion circuit, and the other end is connected to the corresponding coil of the electromagnet, and is configured to collect the current of the corresponding coil of the electromagnet.

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