Safe and reliable hanging type lifting dishwasher

Abstract

Lifting anti-falling protection assemblies are arranged on the two sides of a box body of the safe and reliable hanging type lifting dish washing machine, an upper limiting travel switch and a lower limiting travel switch are integrated on the assembly on one side, and the guiding constraint function and the travel positioning shutdown function are integrated; a safety protection switch and a mechanical protection buffer device are additionally arranged below the lower limiting travel switch, a closed-loop accidental falling triggering mechanism is formed, and the safety protection level in the lifting process of the base is improved; a butt joint limiting structure integrated with an external drainage pipe opening is arranged at the bottom of the box body and matched with an automatic telescopic drainage pipe of the base, so that the butt joint with the external drainage pipe opening is achieved to form a drainage channel, the drainage function is guaranteed, and meanwhile stable mechanical anti-falling guarantee is provided for the base; guide limiting of the lifting anti-falling protection assembly and mechanical locking of the butt joint limiting structure form a multi-layer linkage type safety protection system, the limitation that an existing product depends on single protection is overcome, safety redundancy is greatly improved, and core support is provided for safety and practicability of the hanging type lifting dish washing machine.

Description

Technical Field

[0001] This invention relates to the field of lift-type dishwashers, and more specifically, to a safe and reliable hanging lift-type dishwasher. Background Technology

[0002] With the increasing demand for more efficient kitchen space, wall-mounted lift dishwashers have gradually become an important development direction for modern kitchen appliances due to their advantages such as not occupying floor space, eliminating the need to bend over to load and unload dishes, and being ergonomically designed. The core design of these dishwashers uses a lifting drive mechanism to control the inner drum assembly relative to the fixed cabinet, thus achieving both convenient storage and comfortable use. However, in practical applications, the smooth guidance during the lifting process and operational safety protection remain key technical challenges that limit their performance upgrades.

[0003] For example, Chinese patent CN106175630A discloses a lifting dishwasher. Its lifting drive motor retracts or releases a steel cable to raise or lower the dishwasher body, and uses up / down stroke control switches to stop the lifting drive motor, preventing the dishwasher body from descending and ensuring reliable lifting. However, this lifting dishwasher only provides basic anti-fall protection through a shell limiting block, lacking a protection mechanism for the inner tub after it has risen to its position. When the steel cable breaks, the drive mechanism fails, or the equipment is subjected to external vibration, the inner tub assembly is highly susceptible to accidental descent, posing a serious safety risk.

[0004] The above problems are worth solving. Summary of the Invention

[0005] In order to overcome the problems of existing lifting dishwashers having limited safety protection and lacking reliable protection for the working state after the inner tank is raised into position, this invention provides a safe and reliable hanging lifting dishwasher.

[0006] The technical solution of this invention is as follows:

[0007] A safe and reliable hanging-mounted lift-up dishwasher includes a cabinet assembly and a liftable inner tub assembly. The cabinet assembly includes a cabinet and a lifting drive mechanism, which drives the liftable inner tub assembly to move up and down. The liftable inner tub assembly includes a base and a utensil placement basket. The safe and reliable hanging-mounted lift-up dishwasher also includes:

[0008] The lifting and falling protection assembly is located on both sides of the housing and includes a fixing sleeve vertically fixed to both sides of the inner housing, a connecting rod passing through the fixing sleeve, and a limiting block installed on the upper end of the connecting rod. The connecting rod and the limiting block rise and fall synchronously with the base. One side of the fixing sleeve is also equipped with an upper limit limit switch, a lower limit limit switch, and a safety protection switch. The upper limit limit switch and the lower limit limit switch are used to trigger and control the lifting drive mechanism to stop operating. The safety protection switch is used to activate protection when the lifting drive mechanism is accidentally damaged. The limit limit switches and the safety protection switch constitute a dual protection structure.

[0009] The bottom of the box is equipped with an external port fixing seat, and the base is equipped with an automatic telescopic drain pipe. After the base rises and closes the box, the automatic telescopic drain pipe extends and couples with the external port fixing seat to form a drainage channel and forms a self-locking structure, realizing a mechanical safety protection structure to prevent the base from accidentally slipping.

[0010] Furthermore, the automatic telescopic drain pipe is equipped with a Hall positioning component for monitoring its extension and retraction status, including two Hall positioning sensors and a Hall sensing magnet. The two Hall positioning sensors are respectively located at both ends of the movement trajectory of the automatic telescopic drain pipe, and the Hall sensing magnet is located on the automatic telescopic drain pipe. When the automatic telescopic drain pipe is coupled to the external port fixing seat, the Hall positioning sensor at one end is triggered. When the automatic telescopic drain pipe retracts after being disconnected from the external port fixing seat, the Hall positioning sensor at the other end is triggered. The triggering of either Hall positioning sensor controls the automatic telescopic drain pipe to stop moving.

[0011] As a preferred embodiment of the present invention, the fixing sleeve is a hollow tubular structure, with its two ends respectively fixed to the upper and lower ends of the inner box to form a guide channel extending vertically; the limiting block is fastened to the top of the connecting rod by bolts, the connecting rod is coaxially arranged with the fixing sleeve, and rises and falls synchronously with the base inside the fixing sleeve.

[0012] Furthermore, the side of the limiting block is provided with a plurality of elastic beads, and the limiting block forms an elastically enhanced sliding fit with the inner wall of the fixing sleeve through the elastic beads.

[0013] As a preferred embodiment of the present invention, the fixing sleeve has a cutout at the positions corresponding to the upper limit limit switch, the lower limit limit switch and the safety protection switch. The trigger ends of the upper limit limit switch, the lower limit limit switch and the safety protection switch all extend into the interior of the fixing sleeve through the cutout at the corresponding positions, and each trigger end is located on the vertical sliding path of the limiting block.

[0014] As a preferred embodiment of the present invention, the lifting and falling protection assembly further includes a mechanical protection buffer device located at the bottom of the fixed sleeve, and the mechanical protection buffer device is located below the trigger end of the safety protection switch, so that when the limit block triggers the safety protection switch, the limit block contacts and squeezes the mechanical protection buffer device.

[0015] Furthermore, the mechanical protection buffer device includes elastic silicone and a buffer spring. Two sections of the elastic silicone are respectively connected to the two ends of the buffer spring. The inner diameter of the elastic silicone and the buffer spring is adapted to the outer diameter of the connecting rod and is coaxially sleeved on the outside of the connecting rod. The buffer spring is a compression spring, and its extension and contraction direction is consistent with the axial direction of the connecting rod.

[0016] As a preferred embodiment of the present invention, the top of the side wall of the base is provided with an electrical coupling male connector, the electrical coupling male connector integrates an elastic conductive contact inside, and an electrical coupling female connector is fixed on the top inner side of the housing corresponding to the position of the electrical coupling male connector. When the limit block triggers the upper limit travel switch, the electrical coupling male connector and the electrical coupling female connector are connected to form a power transmission channel.

[0017] As a preferred embodiment of the present invention, the automatic telescopic drain pipe is provided with a drain coupling interface device, which includes a second motor, a telescopic transmission component, an internal drain pipe, and a drain pipe valve head assembly. The output shaft of the second motor is fitted with a drive gear, and the telescopic transmission component has a rack on its outer side. The drive gear meshes with the rack for transmission. The telescopic transmission component is a hollow structure and is sleeved on the outside of the internal drain pipe. Its front end is fixedly connected to the drain pipe valve head assembly. The second motor drives the telescopic transmission component to slide axially along the internal drain pipe, thereby causing the drain pipe valve head assembly to extend or retract from the base.

[0018] As a preferred embodiment of the present invention, the drain pipe valve head assembly includes a silicone joint and a steel sleeve, wherein the silicone joint is used to fit tightly against the external drain pipe opening.

[0019] Furthermore, the steel sleeve has an integrally formed annular boss at the end away from the silicone connector, and a compression spring is provided between the annular boss and the silicone connector. One end of the compression spring abuts against the inner end face of the silicone connector, and the other end abuts against the end face of the annular boss.

[0020] Furthermore, the steel sleeve has a one-way sealing valve at its opening edge. The one-way sealing valve includes a valve seat with a perforated opening, a shaft, a spring, and a sealing plate. The shaft is located on the side of the valve seat facing the drain pipe inside the equipment. The spring and the sealing plate are both sleeved on the shaft. One end of the spring abuts against the valve seat, and the other end abuts against the sealing plate. The diameter of the sealing plate is larger than the inner diameter of the drain pipe inside the equipment and always fits against the end face of the drain pipe opening.

[0021] Furthermore, the opening of the steel sleeve is provided with a countersunk platform, and the valve seat of the one-way sealing valve is fixed to the countersunk platform by screws.

[0022] Furthermore, the drainage coupling interface device also includes a first Hall position sensor, a second Hall position sensor, and a Hall sensing magnet; the first Hall position sensor and the second Hall position sensor are both disposed on the housing of the drainage coupling interface device, and the Hall sensing magnet is embedded in the telescopic transmission component; when the telescopic transmission component drives the drain pipe valve head assembly to slide outward into position, the Hall sensing magnet is facing the first Hall position sensor; when the telescopic transmission component drives the drain pipe valve head assembly to slide inward into position, the Hall sensing magnet is facing the second Hall position sensor.

[0023] As a preferred embodiment of the present invention, the upper end of the external port fixing seat is fixedly connected to the outer side of the bottom of the box, and the lower end extends vertically downward; the external drain pipe is fixed inside the external port fixing seat and is coaxially arranged with the automatic telescopic drain pipe when the base is raised to the position; after the automatic telescopic drain pipe extends out, it passes through the external port fixing seat and connects with the external drain pipe.

[0024] According to the above-described solution, the beneficial effects of this invention are as follows:

[0025] The present invention provides lifting and anti-fall protection components on both sides of the housing, and one side of the component integrates an upper limit limit switch and a lower limit limit switch, combining the guiding constraint and stroke positioning and stopping functions into one. The limit block simultaneously assumes the dual functions of guiding carrier and stroke trigger.

[0026] By adding a safety protection switch below the lower limit limit switch, when the base slips and breaks through the lower limit due to accidental slippage such as wire rope breakage or drive failure, the limit block can trigger the safety protection switch, forming an effective emergency anti-fall trigger mechanism to prevent accidents and greatly improve the safety protection level during the lifting process of the base.

[0027] This invention features an external port fixing seat with an integrated external drain pipe at the bottom of the cabinet. In conjunction with the automatic telescopic drain pipe of the base, when the base is raised to the correct position, the automatic telescopic drain pipe couples with the external drain pipe to form a drainage path. At the same time, the external port fixing seat creates a self-locking limit on the extended drain pipe. This solves the safety hazard of existing lifting dishwashers lacking reliable mechanical locking after being raised to the correct position, and being prone to accidental descent due to vibration or drive failure. While ensuring the drainage function, this invention provides a stable mechanical anti-fall protection for the base during operation.

[0028] As can be seen, the mechanical locking of the guide limit and docking limit structure of the lifting anti-fall protection component of the present invention forms a multi-level, linkage safety protection system. For the use scenario of hanging lifting dishwashers, it completely changes the limitation of the existing technology that only relies on single protection, greatly improves the safety redundancy, and ensures that the base can be stably protected during the lifting process, working state and unexpected working conditions, providing core support for the safe and practical application of hanging lifting dishwashers. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the present invention;

[0030] Figure 2 This is an exploded view of a portion of the structure on one side of the dishwasher's water inlet.

[0031] Figure 3 This is a schematic diagram of the internal structure of the present invention without the outer shell;

[0032] Figure 4 This is an exploded view of a portion of the height-adjustable inner liner assembly.

[0033] Figure 5 A schematic diagram showing the lifting and fall protection components after the fixing sleeve has been removed;

[0034] Figure 6 This is a schematic diagram showing the limit block triggering the upper limit travel switch when the base rises to its final position.

[0035] Figure 7 A partial schematic diagram showing the lower limit travel switch triggered by the limit block when the base descends to the bottom position;

[0036] Figure 8 This is a partial schematic diagram showing the safety protection switch triggered by the limit block when the base falls.

[0037] Figure 9 This is a schematic diagram showing the drainage interface extending and connecting with the external drainage pipe when the base is in its raised position.

[0038] Figure 10 This is an exploded view of the drainage coupling interface device.

[0039] Figure 11 A partially exploded schematic diagram of the drainage coupling interface device;

[0040] Figure 12 This is a cross-sectional view of the drainage coupling interface device;

[0041] Figure 13 This is an exploded view of the drain pipe valve head assembly.

[0042] In the diagram,

[0043] 1. Housing; 11. External port mounting bracket; 12. Electrical coupling female connector; 13. Water inlet;

[0044] 2. Base; 20. Water tank; 21. Drainage coupling interface device; 211. Second motor; 212. Telescopic transmission component; 2121. Rack; 2122. Limiting post; 2123. Hall effect sensor magnet; 213. Internal drain pipe; 214. Drain pipe valve head assembly; 2141. Silicone connector; 2142. Steel sleeve; 2143. Compression spring; 215. Stop block; 216. One-way sealing valve; 2161. Valve seat; 2162. Shaft; 2163. Sealing plate; 2164. Spring; 217. First Hall effect positioning sensor; 218. Second Hall effect positioning sensor; 22. Electrical coupling male connector;

[0045] 3. Lifting and anti-fall protection components; 31. Fixing sleeve; 32. Connecting rod; 33. Limit block; 34. Upper limit limit switch; 35. Lower limit limit switch; 36. Safety protection switch; 37. Mechanical protection buffer device; 371. Elastic silicone; 372. Buffer spring;

[0046] 4. Kitchen utensil storage basket;

[0047] 5. Lifting drive mechanism; 51. First motor; 52. Guide wheel; 53. Steel rope;

[0048] 6. Washing water treatment system;

[0049] 7. Water supply system;

[0050] 8. Sprinkler pipes;

[0051] 9. External drain pipe opening. Detailed Implementation

[0052] To better understand the purpose, technical solution, and technical effects of this invention, the invention will be further explained and described below in conjunction with the accompanying drawings and embodiments. It should be noted that similar reference numerals and letters in the following drawings indicate similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. It is also stated that the embodiments described below are only for explaining this invention and are not intended to limit this invention.

[0053] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is referred to as "connected to" another component, it can be directly connected to the other component or there may be an intermediate component.

[0054] The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product is usually placed when in use, or the orientation or positional relationship in which a person skilled in the art would normally understand it, or the orientation or positional relationship in which the product is usually placed when in use. It is only for the purpose of facilitating the description of this application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0055] The terms “first” and “second” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or specifying the number of technical features. “Several” means two or more, unless otherwise expressly and specifically defined.

[0056] like Figures 1 to 4 As shown, a safe and reliable hanging-type lifting dishwasher includes an outer casing 1 assembly and a liftable inner tub assembly. The outer casing 1 assembly includes a casing 1 and a lifting drive mechanism 5. The casing 1 provides a cleaning chamber, and the bottom of the casing 1 is open. A water inlet 13 is provided at the bottom of one side wall of the casing 1, and the water inlet 13 is connected to tap water (i.e., washing water). The lifting drive mechanism 5 is used to control the lifting of the liftable inner tub assembly at the bottom of the casing 1.

[0057] The liftable inner liner assembly includes a base 2 and a kitchen utensil basket 4. The base 2 integrates a sink 20 and part of the water system, and the kitchen utensil basket 4 is installed above the sink 20. The base 2 is raised and lowered at the bottom opening of the cabinet 1 under the control of the lifting drive mechanism 5. When it rises to the top, the base 2 closes the cabinet 1 and sends the kitchen utensil basket 4 into the cabinet 1. As the base 2 descends, the kitchen utensil basket 4 gradually emerges from the bottom opening of the cabinet 1, making it convenient for users to take out and put away kitchen utensils.

[0058] The liftable inner tank assembly also includes a water system, which comprises a washing water treatment water system 6, a water supply water system 7, a spray cleaning water system, and an internal drainage water system. The washing water treatment water system 6 is located inside the base 2 and below the water tank 20. The water tank 20 has an outlet on its trough plate. Washing water entering from the side wall of the cabinet 1 flows into the water tank 20 and then is supplied to the washing water treatment water system 6 through the outlet. In addition to receiving washing water from the water tank 20, the washing water treatment water system 6 is also used to treat the washing water, supply washing water to the water supply water system 7, and discharge dirty washing water to the internal drainage water system. Treating the washing water includes adding detergent (such as detergent liquid or washing salt) and heating the washing water. One end of the internal drainage water system is connected to the washing water treatment water system 6, and the other end is connected to the external water pipe of the dishwasher, where dirty washing water is discharged from the dishwasher.

[0059] Water supply path 7 is located on one side of the kitchen utensil storage basket 4, and is located on a different side of the cabinet 1 from the water inlet 13. One end of water supply path 7 is connected to the washing water treatment path 6, and the other end is connected to the spray cleaning path, thereby delivering the treated washing water to the spray cleaning path. The spray cleaning path has multiple spray pipes 8, which are spaced apart between the kitchen utensil storage baskets 4 at different heights. Washing water is sprayed out through the spray pipes 8 to clean the bowls, chopsticks, plates, and other kitchen utensils on the kitchen utensil storage basket 4.

[0060] The lifting drive mechanism 5 includes a reversible first motor 51, a winding wheel, a guide wheel 52, and a steel rope 53. The left steel rope 53 is connected to the left side of the base 2, and the right steel rope 53 is connected to the right side of the base 2. The first motor 51 is located at the top center of the housing 1. The output shaft of the first motor 51 is connected to the left and right winding wheels through a synchronous transmission structure (such as a gearbox or synchronous shaft). The left winding wheel is horizontally mounted on the top left side of the housing 1 through a bracket, and the right winding wheel is horizontally mounted on the top right side of the housing 1 through a bracket. The axes of the two winding wheels are parallel and perpendicular to the axis of the output shaft of the first motor 51, ensuring that the motor power is synchronously transmitted to the winding wheels on both sides. There is one guide wheel 52 on the left and one on the right, respectively located at the edges of the top left and right sides of the housing 1. The axle of the guide wheel 52 is parallel to the axis of the winding wheel, and the groove faces the winding wheel direction. It is used to receive the steel rope 53 and change the direction of force. The steel rope 53 passes through the edge of the top plate of the housing 1 and connects to the base 2. Specifically, one end of the left steel rope 53 is fixed in the groove of the left winding wheel, and the other end extends horizontally to the left guide wheel 52 and passes around the groove. Then, it goes vertically downward from the rope hole on the left edge of the top plate of the housing 1 and is fastened to the reinforcing connecting seat on the left side of the base 2. One end of the right steel rope 53 is fixed in the groove of the right winding wheel, and the other end extends horizontally to the right guide wheel 52 and passes around the groove. Then, it goes vertically downward from the rope hole on the right edge of the top plate of the housing 1 and is fastened to the reinforcing connecting seat on the right side of the base 2. The two steel ropes 53 are of the same specification and are arranged symmetrically to ensure that the base 2 is subjected to uniform force and does not tilt when it is raised or lowered.

[0061] When the first motor 51 rotates forward, it drives the two left and right winding wheels to rotate synchronously through the synchronous transmission structure, and synchronously winds up the steel ropes 53 on both sides. After being guided by the guide wheel 52, the steel ropes 53 generate an upward synchronous tension, which drives the base 2 to rise vertically and smoothly along the bottom opening of the box 1 until the top surface of the base 2 is tightly fitted with the sealing surface of the bottom opening of the box 1, closing the box 1. When the first motor 51 rotates in reverse, the synchronous transmission structure drives the two winding wheels to rotate synchronously in opposite directions, and synchronously releases the steel ropes 53 on both sides. Under the action of its own weight and the weight of the kitchenware basket 4, the base 2 descends smoothly, and the kitchenware basket 4 gradually emerges from the bottom opening of the box 1, making it convenient for users to take out and put in kitchenware.

[0062] like Figures 5 to 8As shown, the sidewall of the housing 1 is composed of an inner sidewall panel and an outer sidewall panel. The inner sidewall panel forms the inner housing, and the outer sidewall panel forms the outer housing. There is a cavity between the sidewalls of the inner and outer housings. Lifting and falling protection components 3 are provided on both the left and right sides of the housing 1, and these components are housed within the cavities. Each lifting and falling protection component 3 includes a fixing sleeve 31, a connecting rod 32, and a limiting block 33. One side of the lifting and falling protection component 3 also includes an upper limit limit switch 34, a lower limit limit switch 35, and a safety protection switch 36. The fixing sleeve 31 is a hollow tubular structure. One end of the fixing sleeve 31 is fastened to the upper end of the inner housing by bolts, and the other end extends vertically to the lower end of the inner housing for fixation, forming a vertical guide channel. One end of the connecting rod 32 is fastened to the side connecting seat of the base 2 by bolts, and the other end is fixed to the limiting block 33 by bolts, integral molding, or welding. The connecting rod 32 and the limiting block 33 are inserted into the fixed sleeve 31. During the lifting and lowering of the base 2, the connecting rod 32 synchronously drives the limiting block 33 to slide vertically inside the fixed sleeve 31. In a preferred embodiment, the side of the limiting block 33 is provided with several elastic beads. The limiting block 33 has an outward elastic force through the elastic beads, forming a flexible elastic contact with the inner wall of the fixed sleeve 31. This avoids jamming or wear caused by hard contact, and the self-adjustment of the elastic beads can compensate for minor deviations during installation or use, ensuring the guiding accuracy and smooth sliding of the base 2 during lifting and lowering.

[0063] The upper limit limit switch 34 is installed in the upper part of the cavity on the side wall of the cabinet, and the lower limit limit switch 35 is installed in the lower part of the cavity. The fixing sleeve 31 has openings corresponding to the trigger ends of the upper and lower limit limit switches 35. The trigger ends of the two limit switches extend into the openings of the fixing sleeve 31 and are located on the sliding path of the limiting block 33. When the base 2 rises to the preset closed position, the limiting block 33 moves upward synchronously with the connecting rod 32 to the upper opening of the fixing sleeve 31, and its left or right side touches the trigger end of the upper limit limit switch 34 extending into the opening. When the base 2 descends to the preset pick-up / place-down position, the limiting block 33 moves downward synchronously with the connecting rod 32 to the lower opening of the fixing sleeve 31, and its left or right side touches the trigger end of the lower limit limit switch 35 extending into the opening. When either limit switch is triggered, its trigger signal is transmitted to the dishwasher's main control system in real time, and the main control system immediately controls the first motor 51 to stop rotating.

[0064] The trigger end of the safety protection switch 36 is located below the trigger position of the lower limit travel switch 35, and a mechanical protection buffer device 37 is installed below the trigger end of the safety protection switch 36. In the event of abnormal conditions such as steel cable 53 breakage or transmission mechanism failure, if the base 2 breaks through the limit position of the lower limit travel switch 35 and continues to slide unexpectedly, the limit block 33 will simultaneously slide downwards along the fixing sleeve 31 and fall onto the mechanical protection buffer device 37. At the same time, the side of the limit block 33 will touch the trigger end of the safety protection switch 36. The mechanical protection buffer device 37 quickly absorbs the impact force of the fall through instantaneous pressure deformation, forming a buffer protection effect to prevent the kitchenware in the kitchenware basket 4 from colliding and falling due to severe impact, while also significantly reducing the impact force between the base 2 and the cabinet 1, preventing structural deformation. When the safety protection switch 36 is triggered, the dishwasher's main control system immediately activates the highest level emergency protection program, instantly cutting off the power supply to the entire machine to achieve power failure protection, and forcibly stopping and locking the first motor 51 to prevent the fault from escalating.

[0065] In an optional embodiment, the mechanical protective buffer device 37 has a through hole in the middle to be fitted under the connecting rod 32. The mechanical protective buffer device 37 includes an elastic silicone rubber 371 and a buffer spring 372, with two sections of elastic silicone rubber 371 respectively connected to the two ends of the buffer spring 372. The inner diameter of the elastic silicone rubber 371 and the inner diameter of the buffer spring 372 are both adapted to the outer diameter of the connecting rod 32 and coaxially fitted on the outside of the connecting rod 32. The buffer spring 372 is a compression spring, and its extension and contraction direction is consistent with the axial direction of the connecting rod 32. When the base 2 falls, the connecting rod 32 drives the limiting block 33 to fall onto the elastic silicone rubber 371 above. The elastic deformation of the elastic silicone rubber 371 and the extension and contraction deformation of the buffer spring 372 work together to absorb the impact kinetic energy of the limiting block 33.

[0066] As can be seen, the lifting and anti-fall protection component 3 of this solution is a composite functional structure that integrates the guiding structure and the stroke control structure. This structure replaces the independently set slider and guide rail components in the traditional lifting mechanism, providing stable and precise guiding constraints for the vertical lifting of the base 2, while integrating multi-level stroke control functions. This simplifies the assembly complexity of the internal cavity of the dishwasher, reduces the number of parts and assembly processes, and improves the anti-interference ability and service life of the lifting system.

[0067] like Figure 3As shown, the top of the side wall of the base 2 is equipped with an electrical coupling male connector 22. The electrical coupling male connector 22 integrates elastic conductive contacts, and its housing protection level reaches IPX7, which can resist the corrosion of water vapor generated during cleaning. The electrical coupling male connector 22 forms an electrical connection with the electrical control system of the base 2 through an internal wire. Correspondingly, an electrical coupling female connector 12 is fixedly installed on the lower inner side of the top of the enclosure 1. The electrical coupling female connector 12 is electrically connected to the power module of the enclosure 1 through a hidden wire. The power module is connected to the mains power through an external wire passing through a waterproof wiring hole on the side wall of the enclosure 1. The wiring hole is fixed with a waterproof sealing ring to achieve a safe and stable power supply. When the base 2 rises to the preset closed position, the male electrical coupling connector 22 rises synchronously with the base 2 to a height directly opposite the female electrical coupling connector 12. Through the adaptive expansion and contraction of the elastic conductive contacts to compensate for installation deviations, the male electrical coupling connector 22 and the female electrical coupling connector 12 are precisely aligned and tightly connected, forming a reliable power transmission channel. This provides stable power to the electrical control system and various sensors (such as water level sensors and temperature sensors), water pumps, washing water heating elements, spray control valves, and other electrical components carried by the base 2, ensuring the normal operation of each functional module.

[0068] like Figure 9 As shown, the internal drainage system of base 2 has a retractable drain port. When base 2 rises to its final position and is completely closed to the bottom of the cabinet 1, triggering the upper limit switch 34, the upper limit switch 34 sends a "position confirmation" signal to the electronic control system. Upon receiving the signal, the electronic control system synchronously outputs control commands to drive the retractable mechanism of the drain port, causing the drain port to extend along a preset guide trajectory out of the side wall of base 2 and precisely couple with the external drain pipe 9. This connects the internal and external drainage systems of the dishwasher, allowing the washing water treatment system 6, water supply system 7, spray cleaning system, internal drainage system, and external drainage system to form a complete water system. Before base 2 descends, the electronic control system first sends a signal to control the drain port to retract, detach from the external drain pipe 9, and return to base 2. Then, the first motor 51 is activated to reverse and release the steel cable 53, preventing interference between the drain port and external pipes or surrounding structures, ensuring a smooth descent of base 2. Therefore, the integrity of the water system is linked to the final position of base 2.

[0069] Furthermore, the automatic retractable drain pipe of the internal drainage system also serves to fix the base 2 in its raised position. Specifically, the bottom outer side of the dishwasher body 1 is provided with an external port fixing seat 11, and the upper end of the external port fixing seat 11 is fixed to the bottom outer side of the body 1 by bolts, while the lower end extends vertically downward to the corresponding position of the base 2. The external drain pipe 9 is fixedly installed inside the external port fixing seat 11, and the end face of the pipe is provided with an annular groove, and it is at the same vertical height as the drain interface of the base 2 to ensure accurate docking.

[0070] When the drain port of the internal drainage channel extends out of the base 2 under the control of the electronic control system, it passes into the external port fixing seat 11 and coaxially connects with the external drain pipe 9. At this time, the bottom edge of the external port fixing seat 11 provides support for the drain port pipe. That is, the drain port pipe extending from the base 2 is inserted into the external port fixing seat 11, which is part of the cabinet 1, forming a mating structure similar to a pin and a hole. If the drain port does not retract into the base 2, this "pin-type" mating structure will directly restrict the vertical displacement of the base 2, preventing the base 2 from moving downward. Thus, this structural design constitutes a mechanical locking structure after the base 2 rises to its position. Together with the electrical positioning of the upper limit limit switch 34 and the electrical connection of the male and female electrical connectors, it forms a triple linkage guarantee, ensuring the stability of the coupling connection between the drain port and the external drain pipe 9, and further locking the position of the base 2 through mechanical limiting, preventing the base 2 from falling due to accidental vibration or misoperation during the washing process, greatly improving the structural safety and reliability of the dishwasher during operation.

[0071] like Figures 10 to 12As shown, in one specific embodiment, the automatic telescopic drain pipe of the drainage channel inside the base 2 is implemented through the following structure: the drain interface is provided with a drain coupling interface device 21, which includes a second motor 211, a telescopic transmission component 212, an internal drain pipe 213, and a drain pipe valve head assembly 214. The output shaft of the second motor 211 is fitted with a drive gear, which meshes with the rack 2121 on the outside of the telescopic transmission component 212. The telescopic transmission component 212 is a hollow structure, sleeved on the outside of the internal drain pipe 213 and can slide along the pipe axial direction. The drain pipe valve head assembly 214 is sleeved on the end of the internal drain pipe 213 and the telescopic transmission... The front end of component 212 is connected to the drain pipe valve head assembly 214 by bolts. When the second motor 211 operates, the telescopic transmission component 212 is driven to slide on the drain pipe 213 inside the equipment through the gear and rack mechanism 2121. This causes the drain pipe valve head assembly 214 to slide axially at the end of the drain pipe 213 inside the equipment. When sliding outward, the drain pipe valve head assembly 214 extends out of the base 2 through the reserved hole on the side wall of the base 2 and precisely extends into the interior of the external port fixing seat 11 until it achieves a sealed coupling with the external drain pipe port 9. When sliding inward, the drain pipe valve head assembly 214 simultaneously disengages from the external drain pipe port 9, exits the external port fixing seat 11, and retracts into the base 2. Therefore, when the drain pipe valve head assembly 214 is coupled to the external drain pipe port 9, its extended valve head pipe and the external port fixing seat 11 form a tight "pin-type" mating structure. The cabinet 1 has been fixedly installed on the wall or top cabinet with expansion bolts to form a stable fixed base; the drain pipe valve head assembly 214 of the base 2 is inserted into the external port fixing seat 11, which is part of the cabinet 1, which is equivalent to adding a mechanical anti-fall lock to the base 2. Together with the lifting anti-fall protection assembly 3, it forms a double anti-fall multiple protection, which greatly improves the operational safety of the dishwasher's lifting inner drum assembly.

[0072] The drain pipe valve head assembly 214 includes a silicone connector 2141 and a steel sleeve 2142. The end of the steel sleeve 2142 away from the silicone connector 2141 is integrally formed with an annular boss and connected to the telescopic transmission component 212. A compression spring 2143 is provided between the annular boss and the silicone connector 2141. One end of the compression spring 2143 abuts against the inner end face of the silicone connector 2141, and the other end abuts against the end face of the annular boss. This allows the silicone connector 2141 to have an adaptive buffer stroke during docking with the external drain pipe opening 9. This can not only compensate for installation deviations to achieve precise alignment, but also allow the silicone connector 2141 to fit tightly with the pipe opening through the elastic tension of the compression spring 2143, thereby improving sealing reliability.

[0073] like Figure 13As shown, the steel sleeve 2142 has a one-way sealing valve 216 at the edge of its opening. Its valve seat 2161 has several hollowed-out openings. A shaft 2162 is provided on the side of the valve seat 2161 facing the drain pipe 213 inside the equipment. A spring 2164 and a sealing plate 2163 are sleeved on the shaft 2162. The diameter of the sealing plate 2163 is larger than the inner diameter of the drain pipe 213 inside the equipment. One end of the spring 2164 abuts against the valve seat 2161, and the other end abuts against the sealing plate 2163, so that the sealing plate 2163 is always subjected to a continuous elastic force pressing towards the drain pipe 213 inside the equipment. Therefore, during drainage, the pressure generated by the dirty washing water in the drainage channel inside the base 2 will push open the sealing plate 2163, and the sewage will be smoothly discharged to the external drain pipe through the hollow opening of the valve seat 2161. When drainage is finished or the base 2 is not draining, the elastic force of the spring 2164 will push the sealing plate 2163 to fit against the end face of the drain pipe 213 inside the device, forming a reliable one-way seal that fully covers the device, effectively preventing odors, insects or backflow sewage from entering the dishwasher from the external drain pipe. Moreover, when the base 2 is not in the closed cabinet 1 state, the automatic telescopic drain pipe of the internal drainage channel will retract into the base 2. At this time, the one-way sealing valve 216 keeps the interface closed under the action of the spring elastic force, which can prevent external dust and debris from entering.

[0074] In an optional embodiment, the opening of the steel sleeve 2142 is provided with a countersunk platform, and the valve seat 2161 is fixed to the countersunk platform by screws.

[0075] like Figure 10 As shown, the drain coupling interface device 21 also includes a first Hall position sensor 217 and a second Hall position sensor 218, both of which are mounted on the device housing. A Hall sensor magnet 2123 is embedded in the telescopic transmission member 212, its position precisely corresponding to the sensing surface of the coupling sensor. When the telescopic transmission member 212 drives the drain pipe valve head assembly 214 to slide outwards to couple with the external drain pipe opening 9, the Hall sensor magnet 2123 synchronously moves to the first position, directly facing the first Hall position sensor 217, triggering the first Hall position sensor 217 to send a "connected in place" signal. When the telescopic transmission member 212 drives the drain pipe valve head assembly 214 to slide inwards to the retractable base 2, the Hall sensor magnet 2123 moves to the second position, directly facing the second Hall position sensor 218, triggering it to send a "retracted in place" signal. Both types of signals are transmitted to the dishwasher's electronic control system in real time. The electronic control system uses these signals to confirm the working status of the drain interface and then controls the second motor 211 to stop operating.

[0076] The inner walls of the device housing are provided with symmetrical elongated channels. The telescopic transmission component 212 has integrally formed ribs on both sides that match the channel contours. These ribs are embedded in the channels and can slide smoothly along them, forming a guiding constraint structure to ensure that the telescopic transmission component 212 always moves axially along the drain pipe 213 inside the equipment. A limiting post 2122 is also vertically protruding from the side wall of the telescopic transmission component 212. The limiting post 2122 moves axially synchronously with the sliding of the telescopic transmission component 212. Inside the device housing, near the end of the drain pipe 213, a stop block 215 is fixed along the movement path of the limiting post 2122. When the telescopic transmission component 212 drives the drain pipe valve head assembly 214 to slide outward to the preset docking position, the limiting post 2122 will abut against the stop block 215, mechanically preventing the telescopic transmission component 212 from overextending and avoiding the drain pipe valve head assembly 214 from impacting the external drain pipe port 9, thus protecting components such as the silicone connector 2141 and the one-way sealing valve 216.

[0077] In summary, the safe and reliable hanging-mounted lifting dishwasher of this invention achieves performance upgrades through integrated design and multiple linkage protection mechanisms. A synchronously driven lifting mechanism ensures smooth base lifting, while a lifting anti-fall protection component integrating guide constraints and three-level stroke control (upper and lower limits and emergency protection at the lowest position), combined with a mechanical protection buffer device, forms a buffer against accidental slippage and emergency power-off protection. Simultaneously, after the base rises to its designated position, precise power supply connection of the male and female electrical connectors is achieved, and the automatic retractable drain pipe is sealed and coupled with the external drain pipe opening. Furthermore, the drain interface and the external port fixing seat form a pin-type mechanical lock, constructing a multi-layered safety protection system of "electrical positioning - power supply - drainage connection - mechanical locking - emergency fall prevention." This simplifies the overall structure, reduces parts and assembly processes, and completely solves the pain points of existing lifting dishwashers, such as single safety protection and susceptibility to accidental descent, significantly improving the safety, reliability, and ease of use of the equipment.

[0078] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0079] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A safe and reliable hanging-type lifting dishwasher, comprising a cabinet (1) and a base (2), characterized in that, Also includes: The lifting and falling protection assembly (3) is located on both sides of the housing (1) and includes a fixed sleeve (31), a connecting rod (32), and a limiting block (33). The connecting rod (32) and the limiting block (33) are inserted through the fixed sleeve (31) and rise and fall synchronously with the base (2). One side of the fixed sleeve (31) is also provided with an upper limit travel switch (34), a lower limit travel switch (35), and a safety protection switch (36). The upper limit travel switch (34) and the lower limit travel switch (35) correspond to the upper and lower limit positions of the base (2) respectively. The safety protection switch (36) is located below the trigger end of the lower limit travel switch (35). The bottom of the box (1) is provided with an external port fixing seat (11), and the base (2) is provided with an automatic telescopic drain pipe. When the base (2) rises and closes the box (1), the automatic telescopic drain pipe extends and couples with the external port fixing seat (11) to form a drainage passage, and the external port fixing seat (11) forms a coupling self-locking limit on the extended drain pipe.

2. The safe and reliable hanging-type lifting dishwasher according to claim 1, characterized in that, The fixing sleeve (31) is a hollow tubular structure, with its two ends fixed to the top plate and bottom plate of the box (1) respectively, forming a guide channel extending vertically; the limiting block (33) is fastened to the top of the connecting rod (32) by bolts, the connecting rod (32) is coaxially arranged with the fixing sleeve (31), and rises and falls synchronously with the base (2) inside the fixing sleeve (31).

3. The safe and reliable hanging-type lifting dishwasher according to claim 1, characterized in that, The fixed sleeve (31) has cutouts at the positions corresponding to the upper limit limit switch (34), the lower limit limit switch (35) and the safety protection switch (36). The trigger ends of the upper limit limit switch (34), the lower limit limit switch (35) and the safety protection switch (36) all extend into the fixed sleeve (31) through the cutouts at the corresponding positions, and each trigger end is located on the vertical sliding path of the limit block (33).

4. The safe and reliable hanging-type lifting dishwasher according to claim 1, characterized in that, The lifting and falling protection assembly (3) also includes a mechanical protection buffer device (37) located at the bottom of the fixed sleeve (31), and the mechanical protection buffer device (37) is located below the trigger end of the safety protection switch (36) so that when the limit block (33) triggers the safety protection switch (36), the limit block (33) contacts and squeezes the mechanical protection buffer device (37).

5. The safe and reliable hanging-type lifting dishwasher according to claim 1, characterized in that, The top of the side wall of the base (2) is provided with an electrical coupling male connector (22), and the electrical coupling male connector (22) integrates elastic conductive contacts. The top inner side of the housing (1) is fixed with an electrical coupling female connector (12) corresponding to the position of the electrical coupling male connector (22). When the limit block (33) triggers the upper limit travel switch (34), the electrical coupling male connector (22) and the electrical coupling female connector (12) are connected to form a power transmission channel.

6. The safe and reliable hanging-type lifting dishwasher according to claim 1, characterized in that, The automatic telescopic drain pipe is equipped with a drain coupling interface device (21), which includes a second motor (211), a telescopic transmission component (212), an internal drain pipe (213), and a drain pipe valve head assembly (214). The output shaft of the second motor (211) is fitted with a drive gear, and the telescopic transmission component (212) is provided with a rack (2121) on its outer side. The drive gear meshes with the rack (2121) for transmission. The telescopic transmission component (212) is a hollow structure and is fitted outside the internal drain pipe (213). Its front end is fixedly connected to the drain pipe valve head assembly (214). The second motor (211) drives the telescopic transmission component (212) to slide along the axial direction of the internal drain pipe (213), thereby causing the drain pipe valve head assembly (214) to extend or retract from the base (2).

7. The safe and reliable hanging-type lifting dishwasher according to claim 6, characterized in that, The drain pipe valve head assembly (214) includes a silicone connector (2141) and a steel sleeve (2142), wherein the silicone connector (2141) is used to fit tightly against the external drain pipe opening (9); The steel sleeve (2142) has a one-way sealing valve (216) at the edge of its opening. The one-way sealing valve (216) includes a valve seat (2161) with a hollowed-out opening, a shaft (2162), a spring (2164), and a sealing plate (2163). The shaft (2162) is located on the side of the valve seat (2161) facing the drain pipe (213) inside the equipment. The spring (2164) and the sealing plate (2163) are both sleeved on the shaft (2162). One end of the spring (2164) abuts against the valve seat (2161), and the other end abuts against the sealing plate (2163). The diameter of the sealing plate (2163) is larger than the inner diameter of the drain pipe (213) inside the equipment and fits the end face of the drain pipe (213) opening.

8. The safe and reliable hanging-type lifting dishwasher according to claim 7, characterized in that, The steel sleeve (2142) has an annular boss integrally formed at the end away from the silicone connector (2141). A compression spring (2143) is provided between the annular boss and the silicone connector (2141). One end of the compression spring (2143) abuts against the inner end face of the silicone connector (2141), and the other end abuts against the end face of the annular boss.

9. The safe and reliable hanging-type lifting dishwasher according to claim 6, characterized in that, The drainage coupling interface device (21) further includes a first Hall position sensor (217), a second Hall position sensor (218), and a Hall sensing magnet (2123). The first Hall position sensor (217) and the second Hall position sensor (218) are both disposed on the housing of the drainage coupling interface device (21). The Hall sensing magnet (2123) is embedded in the telescopic transmission member (212). When the telescopic transmission member (212) drives the drain pipe valve head assembly (214) to slide outward into position, the Hall sensing magnet (2123) is facing the first Hall position sensor (217). When the telescopic transmission member (212) drives the drain pipe valve head assembly (214) to slide inward into position, the Hall sensing magnet (2123) is facing the second Hall position sensor (218).

10. The safe and reliable hanging-type lifting dishwasher according to claim 1, characterized in that, The upper end of the external port fixing seat (11) is fixed to the outer side of the bottom of the box (1), and the lower end extends vertically downward; the external drain pipe (9) is fixed inside the external port fixing seat (11) and is arranged coaxially with the automatic telescopic drain pipe when the base (2) is raised to the position. After the automatic telescopic drain pipe extends out, it passes through the external port fixing seat (11) and connects with the external drain pipe (9).

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