Drawer position control device and household appliance

Abstract

The utility model relates to the field of household appliances, in particular to a drawer position control device used for controlling the position of a drawer of a household appliance. The drawer is connected to a bearing structure of the household appliance through a guide rail assembly, and the guide rail assembly comprises a fixed rail fixed to the bearing structure and a sliding rail fixed to the drawer. The drawer position control device comprises a driving module; the position detection module is suitable for detecting the position of the drawer relative to the bearing structure; and the control module is configured to be suitable for controlling the driving module at least according to the position, detected by the position detection module, of the drawer so as to achieve front-back movement of the drawer relative to the bearing structure through relative sliding of the sliding rail and the fixed rail. The driving module comprises a driving device suitable for synchronously driving the sliding rails on the two sides of the drawer at the same time. The drawer position control device is compact in structure, accurate in position measurement and small in occupied size, and therefore the household appliance can be allowed to support automatic opening and closing of the drawer.

Description

Technical Field

[0001] Embodiments of the present application relate to the field of household appliances, and in particular to a drawer position control device for controlling the position of a drawer of a household appliance and a corresponding household appliance. Background Art

[0002] At present, household appliance cabinet products are generally equipped with a drawer structure. Take the refrigerator as an example, which usually includes a drawer used as a freezer. The freezer drawer is generally located at the bottom of the refrigerator, and the user needs to bend over and forcefully open it, especially when the drawer is fully loaded or the internal pressure is negative, the difficulty of opening increases, which is not friendly to special groups such as the elderly, children or pregnant women, and brings inconvenience to them in using the refrigerator. In addition, the drawers of household appliances usually need to be manually pushed back and closed after use, especially when there is no separate door body on the outside of the drawer but instead a front panel as the facade of the household appliance is integrated, it is easy for the user to forget to close the drawer. This will cause the food to not be well preserved and easy to deteriorate, and will also cause a waste of energy. For this reason, it is necessary to propose a solution that can realize the automatic opening / closing of the drawers of household appliances.

[0003] In order to realize the automatic opening / closing of the drawer, a driving unit for driving the drawer to open and close and a position detection unit for detecting the open position of the drawer are both necessary. In the prior art, infrared technology is usually used to realize the corresponding position detection, but infrared is greatly disturbed by mechanical vibration and light, and the detection is inaccurate. In addition, the existing solutions mostly use coaxial planetary gear reduction or parallel axis planetary gear reduction. The former can only realize single-sided drive, and the latter occupies a large volume. It can be seen that it is necessary to propose an improved solution. Utility Model Content

[0004] The purpose of the present application is to provide an improved drawer position control device and an improved household appliance, so as to solve at least one technical problem in the prior art.

[0005] According to a first aspect of the present application, a drawer position control device for controlling the position of a drawer of a household appliance is provided, wherein the drawer is connected to a bearing structure of the household appliance via a guide rail assembly, wherein the guide rail assembly comprises a fixed rail fixed to the bearing structure and a sliding rail fixed to the drawer, and the drawer position control device comprises: a drive module; a position detection module, wherein the position detection module is suitable for detecting the position of the drawer relative to the bearing structure; and a control module, wherein the control module is configured to control the drive module at least according to the position of the drawer detected by the position detection module so as to realize the forward and backward movement of the drawer relative to the bearing structure through the relative sliding of the sliding rail and the fixed rail, wherein the drive module comprises a drive device suitable for synchronously driving the sliding rails at both sides of the drawer at the same time.

[0006] According to an optional embodiment of the present application, the driving device is a motor arranged at a substantially middle position of the rear portion of the drawer.

[0007] According to an optional embodiment of the present application, the driving module further includes a transmission structure, which is suitable for transmitting the driving force of the driving device to the sliding rail so that the sliding rail can slide in the fixed rail.

[0008] According to an optional embodiment of the present application, the driving module further includes a mounting assembly suitable for fixing the motor, and the mounting assembly is connected to the sliding rail at an end.

[0009] According to an optional embodiment of the present application, the motor is a double-output shaft motor, and both ends of the output shaft of the motor are respectively connected to the transmission structure.

[0010] According to an optional embodiment of the present application, the motor is a right-angle reduction motor.

[0011] According to an optional embodiment of the present application, the output shaft of the motor is connected to the transmission structure via a clutch.

[0012] According to an optional embodiment of the present application, the transmission structure includes a gear and a rack meshing with the gear, and the gear is configured to be suitable for rotating on the rack to drive the sliding rail to slide.

[0013] According to an optional embodiment of the present application, the position detection module performs detection based on Hall effect or photoelectric effect.

[0014] According to an optional embodiment of the present application, the motor is a bevel gear reduction motor or a worm gear reduction motor.

[0015] According to an optional embodiment of the present application, the output shaft of the motor is connected to the mounting assembly via a bearing.

[0016] According to an optional embodiment of the present application, the gear is coaxially arranged with an output shaft of the motor.

[0017] According to an optional embodiment of the present application, the gear is connected to the mounting assembly via a bearing, and the rack is fixed to the fixed rail or is a part of the fixed rail.

[0018] According to an optional embodiment of the present application, the position detection module includes a signal generating element arranged at the side of the drawer and a signal detecting element arranged at the supporting structure, and the control module is configured to determine the position of the drawer when the signal generating element is aligned with the signal detecting element.

[0019] According to an optional embodiment of the present application, the position detection module has only one signal generating element and at least two signal detection elements, and the at least two signal detection elements include a first signal detection element and a second signal detection element, wherein when the signal generating element is aligned with the first signal detection element, the drawer is in a fully open position; when the signal generating element is aligned with the second signal detection element, the drawer is in a fully closed position.

[0020] According to an optional embodiment of the present application, the signal generating element is arranged on the mounting assembly.

[0021] According to an optional embodiment of the present application, the signal detection element is arranged on the fixed rail.

[0022] According to an optional embodiment of the present application, the clutch includes an electromagnetic coil, an active friction plate and a driven friction plate, wherein the active friction plate is connected to the output shaft of the motor, the driven friction plate is connected to the gear, and the electromagnetic coil is suitable for turning on or off the torque transmission between the active friction plate and the driven friction plate.

[0023] According to an optional embodiment of the present application, the electromagnetic coil is fixed to the mounting assembly.

[0024] According to an optional embodiment of the present application, the drawer position control device also includes a trigger module, which is suitable for obtaining user instructions, and the control module is also configured to control the driving module and the position detection module based on the user instructions to achieve movement of the drawer relative to the supporting structure.

[0025] According to a second aspect of the present application, a household appliance is provided, which includes a load-bearing structure; a drawer; a guide rail assembly, wherein the drawer is connected to the load-bearing structure via the guide rail assembly; and any drawer position control device according to the present application.

[0026] The drawer position control device according to the present application has a highly integrated structural layout, which is more compact and stable, has less impact on the structure and storage space of the drawer itself, detects the drawer position more accurately, and can achieve double-sided drive for the drawer movement to make the drawer movement smoother and more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be described in more detail below with reference to the accompanying drawings, so that the principles, features and advantages of the present invention can be better understood. In the accompanying drawings:

[0028] Figure 1 A perspective view of a household appliance according to an exemplary embodiment of the present application is shown;

[0029] Figure 2 A schematic diagram of a drawer position control device according to an exemplary embodiment of the present application is shown;

[0030] Figure 3 A rear perspective view of a drawer position control device according to an exemplary embodiment of the present application is shown;

[0031] Figure 4 Shows Figure 3 A front view of a drawer position control device;

[0032] Figure 5 Shows Figure 3 A top view of a drawer position control device;

[0033] Figure 6 Shows Figure 3 An enlarged view of an end portion of a drawer position control device;

[0034] Figure 7 Shows Figure 6 a cross-sectional view of the end portion of

[0035] Figure 8 Shows Figure 5 Side view of the guide rail assembly in .

[0036] Reference numerals list

[0037] 100 Drawer position control device

[0038] 1 Driver module

[0039] 11 Motor

[0040] 111 Output shaft

[0041] 12 Transmission structure

[0042] 121 Gear

[0043] 122 Rack

[0044] 13 Installing Components

[0045] 14 Clutch

[0046] 141 Solenoid coil

[0047] 142 Active friction plate

[0048] 143 Driven friction plate

[0049] 15 Bearings

[0050] 2 Position detection module

[0051] 21 Signal generating element

[0052] 22. Signal detection element

[0053] 221 First signal detection element

[0054] 222 second signal detection element

[0055] 4 Control Module

[0056] 5 Trigger module

[0057] 200 Drawers

[0058] 300 Rail Assembly

[0059] 301 Fixed rail

[0060] 302 Slide rail

[0061] 400 load-bearing structure DETAILED DESCRIPTION

[0062] In order to make the technical problems, technical solutions and beneficial technical effects to be solved by the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and multiple exemplary embodiments. It should be understood that the specific embodiments described herein are only used to explain the principles of the present application, rather than to limit the scope of protection of the present application. In the various drawings of the present application, features with the same structure or similar functions are represented by the same reference numerals.

[0063] Figure 1 1 shows a perspective view of a household appliance according to an exemplary embodiment of the present application. Figure 1 As shown, the household appliance may include a housing and at least one drawer 200. It should be understood that although Figure 1 The household appliance according to the present application is illustrated by taking a refrigerator as an example, but within the scope of the present application, the household appliance is not limited to a refrigerator, and may also be other products with drawers. Figure 1 Preferably, the drawer 200 is integrated with a front panel as the exterior facade of the household appliance, but the present application is not limited to this. The drawer 200 can be completely located inside the shell, that is, there is also a separate door body outside the drawer 200 as the exterior facade of the household appliance.

[0064] In order to support the drawer 200, the household appliance further comprises a bearing structure 400. Here, the bearing structure 400 may be a part of the housing or fixedly connected to the housing. The drawer 200 may be supported by Figure 3 The guide rail assembly 300 is shown connected to a load-bearing structure 400. Figure 5-Figure 7As shown, the guide rail assembly 300 may include a fixed rail 301 fixed to the load-bearing structure 400 and a sliding rail 302 fixed to the drawer 200. The sliding rail 302 may slide relative to the fixed rail 301 in the fixed rail 301, and through the relative sliding, the position of the drawer 200 relative to the load-bearing structure 400 may be changed, thereby realizing the opening and closing of the drawer 200. In order to realize the automatic opening and closing of the drawer 200, the household appliance further includes a drawer position control device 100 for controlling the position of the drawer 200 of the household appliance according to the present application.

[0065] like Figure 2 As shown, the drawer position control device 100 includes a drive module 1, a position detection module 2 and a control module 4. The position detection module 2 is suitable for detecting the position of the drawer 200 relative to the load-bearing structure 400, and the control module 4 is configured to control the drive module 1 at least according to the position of the drawer 200 detected by the position detection module 2 so as to realize the forward and backward movement of the drawer 200 relative to the load-bearing structure 400 through the relative sliding of the sliding rail 302 and the fixed rail 301. The drawer position control device 100 is characterized in that: the drive module 1 includes a drive device suitable for synchronously driving the sliding rails 302 at both sides of the drawer 200 at the same time. Thereby, the double-sided drive drawer movement can be realized. Compared with the single-sided drive in the prior art, the double-sided drive of the drawer movement realized by the drive module 1 can make the drawer movement more stable, smoother and more labor-saving.

[0066] Further, in some optional embodiments, such as Figure 3 and Figure 4 As shown, the driving device is a motor 11 arranged at a substantially middle position of the rear part of the drawer 200. In the prior art, the driving unit is usually arranged at the bottom of the drawer body, which has the risk of water ingress and is not convenient for users to clean. According to some embodiments of the present application, the motor 11 is arranged at the rear part of the drawer 200, especially as shown in FIG. Figure 3 The rear top shown in the figure reduces or avoids the risk of water ingress, is also convenient for users to clean, and is conducive to extending the service life of the motor 11.

[0067] Preferably, the motor 11 can be a double-output shaft motor, and the two ends of the output shaft 111 of the motor 11 are respectively connected to the transmission structure 12 to be described below. That is, the double-sided drive of the drawer movement can be achieved by a single motor 11. As a result, the occupied volume of the drive device can be made smaller, thereby allowing a larger drawer capacity. Additionally or alternatively, the motor 11 can be a right-angle reduction motor. The output shaft of the right-angle reduction motor is at right angles to the motor body, so the structure is compact and can save working space. Exemplarily, the motor 11 can be a bevel gear reduction motor or a worm gear reduction motor.

[0068] In addition to the motor 11 , the driving module 1 further comprises a transmission structure 12 , which is suitable for transmitting the driving force of the driving device to the sliding rail 302 so that the sliding rail 302 can slide in the fixed rail 301 .

[0069] Furthermore, if Figure 6-Figure 8 As shown, the transmission structure 12 may include a gear 121 and a rack 122 meshing with the gear 121, and the gear 121 is configured to rotate on the rack 122 to drive the sliding rail 302 to slide. Preferably, the transmission structure 12 includes two racks 122 and two corresponding gears 121 respectively located at the sliding rails on both sides of the drawer 200, that is, the two gears 121 can be driven to rotate synchronously along the corresponding racks 122 through a driving device, such as a motor 11, so as to drive the two sliding rails 302 on both sides to slide synchronously. In this way, the sliding synchronization of the sliding rails 302 on both sides can be achieved, thereby improving the smoothness and stability of the opening and closing of the drawer 200.

[0070] Preferably, if Figure 7 As shown, the gear 121 is coaxially arranged with the output shaft 111 of the motor 11. In this way, the distance between the motor 11 and the gear 121 can be shortened, thereby improving the driving efficiency of the motor 11, saving energy consumption and providing a compact structure.

[0071] In some optional embodiments, the output shaft 111 of the motor 11 is connected to the transmission structure 12 via a clutch 14. In the case where the motor 11 has a dual output shaft 111, each output shaft 111 is connected to the transmission structure 12 via a clutch 14, that is, the drive module 1 includes two clutches 14 respectively arranged on both sides of the motor body. The clutch 14 can be, for example, a dry single-plate electromagnetic clutch.

[0072] For example, in one specific embodiment, Figure 6 and Figure 7 As shown, the clutch 14 may include an electromagnetic coil 141, an active friction plate 142 and a driven friction plate 143. The active friction plate 142 is connected to the output shaft 111 of the motor 11, the driven friction plate 143 is connected to the gear 121, and the electromagnetic coil 141 is suitable for conducting or disconnecting the torque transmission between the active friction plate 142 and the driven friction plate 143. Preferably, the driven friction plate 143 is fixed together with the gear 121, in particular, arranged coaxially, in particular, clamped together. In this way, a compact structure can be provided without occupying the storage space of the drawer.

[0073] By introducing the clutch 14 , the automatic opening and closing mode and the manual opening and closing mode of the drawer 200 can be freely switched.

[0074] For example, when the drawer 200 needs to be opened and closed automatically, the electromagnetic coil 141 can be energized to enable the torque transmission between the active friction plate 142 and the driven friction plate 143 to be turned on. At this time, the output torque of the motor 11 can be transmitted to the clutch 14 through the output shaft 111 and then to the gear 121, so that the gear 121 can move relatively on the rack 122 until the position detection module 2 detects that the drawer 200 reaches the desired position (for example, the fully open position or the fully closed position). At this time, the motor 11 can be stopped and the electromagnetic coil 141 can be powered off. In this way, the automatic opening and closing function of the drawer can be realized.

[0075] If the drawer 200 is to be opened and closed manually, the clutch 14 can be kept in a disconnected state, for example, the electromagnetic coil 141 is not energized, so that the output torque of the motor 11 is not transmitted to the gear 121. In addition, when the drawer 200 is opened and closed manually, since the clutch 14 is in a disconnected state, the torque of the gear 121 is not transmitted to the motor 11, causing the motor to be dragged backward. In this way, the manual opening and closing function of the drawer can be realized.

[0076] A specific trigger signal can be set to distinguish the automatic opening and closing mode from the manual opening and closing mode. For example, when the control module 4 receives a specific trigger signal, it determines that the automatic opening and closing mode needs to be executed, otherwise it is the manual opening and closing mode. That is, the energization of the electromagnetic coil 141 of the clutch 14 and the rotation of the motor 11 can be executed in response to receiving the specific trigger signal.

[0077] In some optional embodiments, such as Figure 4 , Figure 6 and Figure 7 As shown, the drive module 1 can also include a mounting assembly 13 suitable for fixing the motor 11, and the mounting assembly 13 is preferably connected to the sliding rail 302 at the end. Thus, by the mounting assembly 13, the sliding of the sliding rails 302 on both sides of the drawer 200 can be synchronized. Since the clutch is in a disconnected state in the manual opening and closing mode, it is difficult to ensure that the two motor output shafts 111 operate synchronously so that the two sliding rails 302 can slide synchronously, which will cause the imbalance of the drawer movement. For this reason, the mounting assembly 13 can advantageously avoid the occurrence of this situation. In addition, the prior art generally adopts a single-sided cantilever beam structure to fix, but the structural stability is poor, and the support strength of the drive device (such as the motor 11) is not enough. The two sides of the mounting assembly 13 are respectively fixed to the two side sliding rails 302 of the drawer 200, which can provide stable and sufficient support to the motor 11.

[0078] The mounting assembly 13 may be a combination of multiple sub-components connected to each other as shown in the figure, a one-piece without a connection interface inside, or a combination thereof. Further, in addition to fixing the motor 11, the mounting assembly 13 may also provide fixed support for the electromagnetic coil 141 and / or the position detection module 2 described below, in particular the signal generating element 21.

[0079] Additionally or alternatively, such as Figure 7 As shown, the output shaft 111 of the motor 11 is connected to the mounting assembly 13 through a bearing 15. In particular, two bearings 15 can be sleeved on the output shaft 111 of the motor 11, and the two bearings 15 respectively establish a connection between the output shaft 111 and the mounting assembly 13 at different positions. Additionally or alternatively, the gear 121 can also be connected to the mounting assembly 13 through the bearing 15. For example, as shown, the part of the mounting assembly 13 for supporting the gear 121 can be coupled to the gear 121 through one bearing 15, and coupled to the output shaft 111 of the motor 11 through another bearing 15. Thereby, an integrated, compact and stable force transmission structure is achieved.

[0080] Additionally or alternatively, the rack 122 is fixed to the fixed rail 301 or is a part of the fixed rail 301. In this way, the fixed installation of the rack 122 can be facilitated.

[0081] In some optional embodiments, the position detection module 2 can perform detection based on the Hall effect or the photoelectric effect. Compared with the existing infrared position detection device, the position detection module based on the Hall effect or the photoelectric effect can provide more stable and accurate position detection and is almost unaffected by mechanical vibration or light interference.

[0082] Furthermore, if Figure 6 and Figure 7 As shown, the position detection module 2 may include a signal generating element 21 arranged at the side of the drawer 200 and a signal detecting element 22 arranged at the bearing structure 400, and the control module 4 is configured to determine the position of the drawer 200 when the signal generating element 21 is aligned with the signal detecting element 22. In the prior art, the position detection module is usually arranged at the bottom or side of the drawer box, but this will destroy the original structure of the drawer box. In the present application, the natural gap between the drawer 200 and the bearing structure 400 is fully utilized to arrange the position detection module 2, so that the installation and arrangement of the position detection module 2 saves more internal space and does not affect the structure of the drawer box itself.

[0083] Further, the position detection module 2 may have only one signal generating element 21 and at least two signal detecting elements 22, wherein the at least two signal detecting elements 22 include a first signal detecting element 221 and a second signal detecting element 222, wherein the signal generating element 21 and the at least two signal detecting elements 22 are connected to each other. Figure 8 When the first signal detection element 221 is aligned with the first signal detection element 221, the drawer 200 is in the fully open position; Figure 8 When the second signal detection element 222 is aligned as shown, the drawer 200 is in a fully closed position. Thus, a position detection module 2 with a simple structure can be realized. Optionally, one or more intermediate signal detection elements can be arranged between the first signal detection element 221 and the second signal detection element 222, so as to provide corresponding position detection when the drawer is partially opened.

[0084] Preferably, the signal generating element 21 may be a passive magnetic element or a mechanical structure. Here, a passive magnetic element is distinguished from an active magnetic element, and may refer to an element having magnetism and not being actively controlled or adjusted at least during operation. Passive magnetic elements may be suitable for generating magnetic fields, such as static magnetic fields, and may be made of magnetic materials (such as ferromagnetic materials) or permanent magnets. In the case where the signal generating element 21 is a mechanical structure, it may generate a mechanical signal that can be received by a corresponding signal detection element, and the mechanical signal also does not require active control or adjustment. Therefore, compared to the prior art, the signal generating element 21 can transmit a signal without power supply, so that the signal generating element 21 does not need to be wired, simplifying the structural arrangement.

[0085] Accordingly, the signal detection element 22 can be a Hall element or a photoelectric switch. When the signal generating element 21 moves to align with the detection element 22, especially with the first signal detection element 221 or the second signal detection element 222, the signal generated by the signal generating element 21 can be detected by the detection element 22, and when the two are not aligned, the signal cannot be detected. Thus, the problem of low accuracy of existing infrared position detection can be solved by detecting magnetic signals or mechanical signals. Unlike the above-mentioned signal generating element 21, the signal detection element 22 requires power supply during operation.

[0086] On this basis, the signal generating element 21 can be arranged on the mounting assembly 13. Additionally or alternatively, the signal detecting element 22 can be arranged on the fixed rail 301. Since it is easy to wire on the bearing structure 400 compared to the drawer, because it can provide a larger area and is easy to connect to the power supply. Therefore, the signal generating element 21 that does not need to be wired can be arranged on the movable drawer 200 side, and the signal detecting element 22 that needs to be wired can be arranged on the fixed bearing structure 400 side, thereby simplifying the overall wiring for the position detection module 2. When the drawer 200 moves relative to the bearing structure 400, the signal generating element 21 can be driven by the drawer to move relative to the bearing structure 400, and when it moves to align with one of the signal detecting elements 22 fixed on the bearing structure 400, the position of the drawer 200 corresponding to the signal detecting element 22 can be determined with the help of the signal detecting element 22.

[0087] In some optional embodiments, such as Figure 2 As shown, the drawer position control device 100 may also include a trigger module 5, which is suitable for obtaining user instructions, and the control module 4 is also configured to control the drive module 1 and the position detection module 2 based on the user instructions to realize the movement of the drawer 200 relative to the bearing structure 400. Here, the trigger module 5 can generate a trigger signal based on the user instruction, and then send the trigger signal to the control module 4 by wire or wirelessly. Afterwards, the control module 4 responds to the trigger signal of the trigger module 5 and uses the position signal of the signal detection element 22 to control the drive module 1 to drive the drawer to move. Among them, the trigger module 5 can be implemented based on voice interaction, knocking, touch, gesture or photoelectricity, providing a variety of user operations. In addition, the trigger module 5 may also include or be communicatively connected to an external mobile device of the household appliance in some cases, so that the user can input the trigger instruction through the external mobile device.

[0088] The drawer position control device according to the present application has a highly integrated structural arrangement, a more compact and stable structure, less impact on the structure and storage space of the drawer itself, more accurate detection of the drawer position, and can realize double-sided drive of the drawer movement to make the drawer movement smoother and more stable. In addition, the drawer position control device according to the present application allows the drawer to switch freely between the automatic opening and closing mode and the manual opening and closing mode, and also provides a variety of user triggering means, thereby improving the user experience.

[0089] It is worth noting that, in this document, the expressions "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance, nor should they be understood as implicitly indicating the number of the indicated technical features. Features defined as "first" or "second" may explicitly or implicitly indicate that at least one of the features is included.

[0090] It should also be noted that, in the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0091] In addition, in the description of this application, unless otherwise clearly specified and limited, the terms "installation", "connection", etc. should be understood in a broad sense, for example, it can be fixed installation / connection, detachable installation / connection, or integrated installation / connection; it can be direct installation / connection, or indirect installation / connection through an intermediate medium, or the two components can be connected internally. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

Claims

1. A drawer position control device (100) for controlling the position of a drawer (200) of a household appliance, wherein the drawer (200) is connected to a bearing structure (400) of the household appliance via a guide rail assembly (300), wherein: The guide rail assembly (300) comprises a fixed rail (301) fixed to the bearing structure (400) and a sliding rail (302) fixed to the drawer (200). Characterized in that the drawer position control device (100) comprises: Driver module (1); A position detection module (2), the position detection module (2) being adapted to detect the position of the drawer (200) relative to the bearing structure (400); and a control module (4), the control module (4) being configured to control the driving module (1) at least according to the position of the drawer (200) detected by the position detection module (2) so as to realize the forward and backward movement of the drawer (200) relative to the bearing structure (400) through the relative sliding of the sliding rail (302) and the fixed rail (301), The driving module (1) comprises a driving device suitable for synchronously driving the sliding rails (302) on both sides of the drawer (200) at the same time.

2. The drawer position control device (100) according to claim 1, characterized in that: The driving device is a motor (11) arranged at a substantially middle position of the rear portion of the drawer (200); and / or The driving module (1) further comprises a transmission structure (12), wherein the transmission structure (12) is suitable for transmitting the driving force of the driving device to the sliding rail (302) so that the sliding rail (302) can slide within the fixed rail (301).

3. The drawer position control device (100) according to claim 2, characterized in that: The drive module (1) further comprises a mounting assembly (13) suitable for fixing the motor (11), wherein the mounting assembly (13) is connected to the sliding rail (302) at an end; and / or The motor (11) is a double-output shaft motor, and both ends of the output shaft (111) of the motor are respectively connected to the transmission structure (12); and / or The motor (11) is a right-angle reduction motor; and / or The output shaft (111) of the motor (11) is connected to the transmission structure (12) via a clutch (14); and / or The transmission structure (12) comprises a gear (121) and a rack (122) meshing with the gear (121), and the gear (121) is configured to be suitable for rotating on the rack (122) to drive the sliding rail (302) to slide; and / or The position detection module (2) performs detection based on the Hall effect or the photoelectric effect.

4. The drawer position control device (100) according to claim 3, characterized in that: The motor (11) is a bevel gear reduction motor or a worm gear reduction motor; and / or The output shaft (111) of the motor (11) is connected to the mounting assembly (13) via a bearing (15); and / or The gear (121) is coaxially arranged with the output shaft (111) of the motor (11); and / or The gear (121) is connected to the mounting assembly (13) via a bearing (15), and the rack (122) is fixed to the fixed rail (301) or is a part of the fixed rail (301).

5. The drawer position control device (100) according to claim 3, characterized in that: The position detection module (2) comprises a signal generating element (21) arranged at a side of the drawer (200) and a signal detecting element (22) arranged at the supporting structure (400), and the control module (4) is configured to determine the position of the drawer (200) when the signal generating element (21) is aligned with the signal detecting element (22).

6. The drawer position control device (100) according to claim 5, characterized in that: The position detection module (2) has only one signal generating element (21) and at least two signal detecting elements (22), wherein the at least two signal detecting elements (22) include a first signal detecting element (221) and a second signal detecting element (222), wherein when the signal generating element (21) is aligned with the first signal detecting element (221), the drawer (200) is in a fully open position; and when the signal generating element (21) is aligned with the second signal detecting element (222), the drawer (200) is in a fully closed position; and / or The signal generating element (21) is arranged on the mounting assembly (13); and / or The signal detection element (22) is arranged on the fixing rail (301).

7. The drawer position control device (100) according to claim 3, characterized in that: The clutch (14) comprises an electromagnetic coil (141), an active friction plate (142) and a driven friction plate (143), wherein the active friction plate (142) is connected to the output shaft (111) of the motor (11), the driven friction plate (143) is connected to the gear (121), and the electromagnetic coil (141) is suitable for switching on or off the torque transmission between the active friction plate (142) and the driven friction plate (143).

8. The drawer position control device (100) according to claim 7, characterized in that: The electromagnetic coil (141) is fixed to the mounting assembly (13).

9. The drawer position control device (100) according to any one of claims 1 to 8, characterized in that: The drawer position control device (100) further comprises a trigger module (5), wherein the trigger module (5) is adapted to obtain user instructions, and the control module (4) is further configured to control the drive module (1) and the position detection module (2) based on the user instructions to achieve movement of the drawer (200) relative to the bearing structure (400).

10. A household appliance, characterized in that: The household appliances include: A load-bearing structure (400); Drawer(200); A guide rail assembly (300), wherein the drawer (200) is connected to the load-bearing structure (400) via the guide rail assembly (300); and A drawer position control device (100) according to any one of claims 1-9.

Images