Integrated self-cleaning exhaust scrubbing cabinet

Abstract

The utility model provides a kind of integrated self-cleaning exhaust scrubbing cabinet, belong to scrubbing cabinet technical field, this integrated self-cleaning exhaust scrubbing cabinet includes cabinet, table top, basin and drip rack component, wherein: the basin is embedded in the central table top, and the outer periphery of basin mouth part is provided with annular slit air inlet, and the air inlet is communicated with laboratory centralized exhaust system or cabinet self-contained fan through cabinet internal air duct;The drip rack component is located below the table top of the lateral side of basin, and its drain grating can be vertically extended out of the table top or completely sunk below the table top under the driving of lifting drive;A trolley is further provided on one side of the bottom of the cabinet, the trolley is embedded in the accommodation cavity reserved on the other side of the cabinet in a push-pull manner, the opening of the accommodation cavity is flush with the side plate of the cabinet, and the outside of the trolley forms a continuous appearance with the side of the cabinet at the push-in position, solving the technical problem of how to efficiently capture and discharge harmful steam at the source of cleaning experimental vessels simultaneously, and avoiding its diffusion to the laboratory environment.

Description

Technical Field

[0001] This utility model belongs to the field of washing cabinet technology, specifically, it relates to an integrated self-cleaning and exhaust washing cabinet. Background Technology

[0002] Waste washing cabinets are among the most basic and frequently used pieces of equipment in laboratories. Their core function is to provide a place for cleaning glassware and to perform preliminary drying and temporary storage. Traditional waste washing cabinets typically consist of a corrosion-resistant cabinet, a work surface, a sink, and a simple drain, supplemented by an independent drip rack or wall-mounted rack. Their simple construction and low cost have long made them widely used in various types of laboratories. However, as experiments become increasingly complex and reagents more diverse, the traditional waste washing cabinet's single-mode of "water supply without gas control" has gradually revealed multiple hidden dangers. First, when cleaning glassware containing volatile solvents, strong acids or alkalis, or biologically active substances, harmful vapors diffuse freely from the water surface. The cabinet itself has no means of capturing these vapors, forcing laboratory personnel to inhale contaminants at close range, significantly increasing health risks. If a separate universal exhaust hood is moved, it causes work surface congestion, lengthens the operating route, and the hood opening is far from the water surface, resulting in low capture efficiency, allowing vapors to easily escape from the side edges. Secondly, after cleaning, the utensils need to be transferred to a separate drip rack to drain. This rack occupies countertops or walls year-round, and dripping liquid flows along the outer wall of the utensils to the countertop, creating secondary wetting and cross-contamination. At the same time, residual solvents continue to evaporate at room temperature, turning the drying area into a new source of contamination. If wet utensils are placed directly into the drying oven, the large volume of water and mixed solvents will not only waste energy but may also cause a deflagration. Furthermore, the internal space of traditional cabinets is divided by fixed partitions, lacking the ability to accommodate utensils of different heights and volumes. When cleaning batches or large utensils, personnel can only stack containers on the ground or use temporary carts, resulting in repeated, inefficient, and easily damaged transport routes. Finally, the drain outlet is only equipped with a simple filter, allowing chemical solid waste to easily enter the pipes directly, causing blockages that require disassembling the entire section of the bend for cleaning, resulting in long maintenance downtime. There are dead corners at the joints between the cabinet bottom and side panels, where residual liquid seeps in and is difficult to rinse thoroughly, accumulating over the years to produce odors and corrode the connecting parts. Utility Model Content

[0003] In view of this, the present invention provides an integrated self-cleaning exhaust washing cabinet, which solves the technical problem of how to simultaneously and efficiently capture and exhaust harmful vapors at the source of cleaning experimental equipment, and prevent them from spreading into the laboratory environment.

[0004] This utility model is implemented as follows: This utility model provides an integrated self-cleaning and exhaust-ventilated washing cabinet, including a cabinet body, a countertop, a sink, and a drip rack assembly, wherein: The basin is embedded in the center of the countertop, and an annular slit air intake is arranged around the outer perimeter of the basin opening. The air intake is connected to the laboratory's centralized exhaust system or the cabinet's own fan through the internal air duct of the cabinet. The drip rack assembly is located below the countertop on the horizontal side of the basin. Its drain grid can extend vertically out of the countertop or be completely submerged below the countertop under the action of the lifting drive, and is flush with the countertop surface at the submerged position. A trolley is also provided on one side of the bottom of the cabinet. The trolley is embedded in the cavity reserved on the other side of the cabinet in a push-pull manner. The opening of the cavity is flush with the side panel of the cabinet. The bottom plate of the trolley is coplanar with or slightly higher than the bottom plate of the cabinet, so that the outer side of the trolley forms a continuous appearance surface with the side of the cabinet when it is pushed in.

[0005] The technical advantages of the integrated self-cleaning and exhaust washing cabinet provided by this utility model are as follows: By surrounding the sink opening with a ring-shaped slit air intake, concealing the liftable drip rack under the countertop, and embedding the trolley into the side cavity of the cabinet, the washing cabinet can simultaneously perform three major functions: "source air capture - concealed draining - flexible transfer". It can not only extract harmful vapors during washing, but also completely sink the drip rack under the countertop and push the trolley back to be flush with the side of the cabinet when not in use. This significantly reduces laboratory air pollution, countertop occupation, and passage blockage, achieving safe, compact, and aesthetically pleasing integrated operation.

[0006] Based on the above technical solution, the integrated self-cleaning and exhaust washing cabinet of this utility model can be further improved as follows: The air intake is a continuous slit that surrounds the water basin. The upper edge of the slit is flush with the upper edge of the water basin, and the lower edge is sealed to the main exhaust pipe of the cabinet through a pressure equalization duct.

[0007] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the annular slit air intake is set as a continuous slit that surrounds the entire water basin and the upper edge is flush with the upper edge of the water basin, so that the steam is uniformly covered by negative pressure as soon as it leaves the liquid surface, avoiding local escape. At the same time, the continuous slit structure is simple to process, has no extra protruding parts, does not obstruct the experimenter's line of sight and arm movements, improves the collection efficiency and keeps the table clean.

[0008] Furthermore, the drip rack assembly includes a rectangular drain grille, an exhaust cavity, and a lifting drive component. The exhaust cavity is fixed directly below the drain grille and sealed to the bottom surface of the drain grille. The side wall of the exhaust cavity is connected to the main exhaust duct of the cabinet via a flexible duct.

[0009] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the exhaust cavity is sealed directly below the drain grid and connected to the main exhaust duct in parallel through a flexible duct, so that the residual liquid dripping from the container and its volatile gases are continuously drawn downwards, realizing "drip and discharge at the same time", preventing secondary volatilization and pollution of the indoor environment. In addition, the flexible duct ensures that the entire lifting process is sealed without breaking, ensuring stable exhaust.

[0010] Furthermore, the lifting drive component is a vertically arranged linear actuator, with its fixed end installed on the cabinet side plate or bottom plate, and its movable end fixedly connected to the outer wall of the exhaust cavity, so that the drain grille remains horizontal throughout the lifting process.

[0011] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the vertical linear actuator is fixed to the side plate or bottom plate of the cabinet and directly drives the outer wall of the exhaust cavity, so that the drain grid remains absolutely horizontal and without lateral swaying during the lifting process, preventing the utensils from slipping. At the same time, the drive components are hidden inside the cabinet and not exposed, reducing the risk of corrosion and extending the service life.

[0012] Furthermore, the trolley includes multi-layered shelves, railings, and casters with brakes. The outer contour of the shelves complements the shape of the cavity opening. The height of the railings is no higher than the tabletop, so that when the trolley is pushed into position, the edge of its shelves fits the inner surface of the cabinet side panel with a clearance.

[0013] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the trolley is designed with multi-layer shelves and railings, and the outer contour complements the opening of the receiving cavity. After being pushed in, the height of the railings is no higher than the tabletop. Experimenters can place the utensils to be washed or washed in layers and categories, and transport them in batches at one time, reducing the number of trips. After being pushed in, the outer surface is almost seamless with the side panel of the cabinet, keeping the corridor unobstructed and the laboratory visually unified.

[0014] Furthermore, the drain outlet of the basin is equipped with a basket filter that can be disassembled and installed with one hand. The outer wall of the filter and the inner wall of the drain outlet of the basin are connected by a rotating snap-fit ​​through circumferential ribs.

[0015] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: a basket filter that can be disassembled and installed with one hand is installed at the drain outlet of the water basin and connected by a rotating buckle with circumferential ribs. During cleaning, the filter can be lifted and the solid waste can be emptied without tools, which greatly shortens the maintenance time, reduces the probability of blockage, and ensures the long-term stable operation of the exhaust water basin.

[0016] Furthermore, the cabinet is equipped with a main exhaust duct, which is arranged vertically along the back panel of the cabinet. Its upstream end is connected in parallel with both the air intake and the exhaust cavity, and its downstream end is led out from the top or back panel of the cabinet and connected to the laboratory's centralized exhaust system.

[0017] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the main exhaust duct of the cabinet is arranged vertically along the back panel of the cabinet, and the upstream end is connected to the annular slit air intake and exhaust cavity in parallel, and the downstream end is uniformly led out to the laboratory centralized exhaust system. This makes the internal duct of the washing cabinet the shortest, with the fewest bends, and reduces pressure loss. It saves space inside the cabinet and ensures that the air volume of the two exhaust channels is balanced, thereby improving the overall air extraction efficiency.

[0018] Furthermore, the upper surface of the drain grid is provided with downward-bent water-blocking flanges around its perimeter. The lower end of the water-blocking flanges extends into the exhaust cavity, so that the dripping liquid is confined in the exhaust cavity and continuously pumped out.

[0019] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the downward-bent water-blocking flanges are set around the drain grid and extend into the exhaust cavity, which forces the dripping liquid to enter the exhaust cavity directly along the flanges and be drawn away immediately, avoiding the liquid from seeping into the lifting gaps or the inside of the cabinet, thereby preventing corrosion and odor accumulation, extending the service life of the mechanism and keeping the inside of the cabinet clean.

[0020] Furthermore, the bottom plate of the receiving cavity is provided with a positioning groove, and the corresponding position of the trolley bottom beam is provided with an elastic positioning pin. The positioning pin engages with the groove at the end point of the push-in to limit the trolley from sliding.

[0021] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: a positioning groove is set in the bottom plate of the receiving cavity and an elastic positioning pin is set in the corresponding position of the trolley bottom beam. When pushed into the end point, the pin groove automatically engages. Even if the personnel accidentally touch it or the ground is uneven, the trolley will not slide out on its own, ensuring the safety of the passage. At the same time, the positioning structure is hidden in the bottom surface, which does not affect the appearance and the carrying space.

[0022] Furthermore, the countertop has a continuous waterproof lip between the sink and the drip rack assembly. The height of the waterproof lip is lower than the upper surface of the drain grille after it is raised, so as to prevent liquid from flowing into the lifting gap.

[0023] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: a continuous transition waterproof lip is provided on the countertop between the sink and the drip rack assembly, and the height of the lip is lower than the upper surface of the raised drain grille. This can prevent liquid from flowing into the lifting gap, avoid the lifting mechanism from getting stuck or corroding due to liquid accumulation, and thus ensure that the drip rack can be raised and lowered smoothly and keep the cabinet dry for a long time.

[0024] Compared with existing technologies, the beneficial effects of the integrated self-cleaning exhaust washing cabinet provided by this utility model are as follows: This utility model structurally couples the annular slit air intake, the liftable concealed exhaust drip rack, and the embedded trolley with the cabinet and the basin to form an integrated closed loop of "washing-exhausting-drip-storage," significantly improving the laboratory safety level and operating experience. The annular slit air intake surrounds the basin opening, allowing steam to be captured by the continuous negative pressure layer before leaving the cleaning area, avoiding the escape problem caused by the long distance and lack of coverage angle of traditional external exhaust hoods; since the air intake is flush with the upper edge of the basin, the forearm movement space of the experimenter is not obstructed, maintaining visual and operational continuity, and the cleaning action is natural and smooth. The adjustable drip rack is fully submerged below the countertop in its default state, keeping the countertop flat and providing temporary placement for other equipment. When drainage is needed, it can be raised vertically with a single button or touch. Once raised, its drain grille and the exhaust chamber below form a downward suction channel, instantly removing liquid dripping from the outer wall of the containers and its volatile gases, achieving "drip-and-drain" and eliminating the problems of liquid accumulation, odor diffusion, and secondary contamination of the countertop associated with traditional drip racks. After drainage, the drip rack returns to its concealed position, maintaining a clean appearance and eliminating the need for additional wiping of the surrounding area. The embedded trolley complements the shape of the cabinet's side cavity, and when pushed in, its outer surface is flush with the cabinet's side panel, not occupying aisle width and keeping the laboratory's workflow unobstructed. The multi-layer shelf can be pre-placed for containers to be washed or receive cleaning equipment, allowing for batch movement, reducing personnel back and forth, and improving cleaning efficiency. The positioning pins and grooves ensure stable parking and prevent accidental slippage. The main exhaust duct of the cabinet is arranged vertically along the back panel. Upstream, it connects in parallel to a ring-shaped air intake and a drip rack exhaust chamber. Downstream, it connects to the centralized laboratory exhaust system. The duct is short with few bends, reducing system resistance, balancing airflow distribution, and consequently reducing operating noise. The drain outlet uses a rotatable and detachable basket filter, simplifying solid waste disposal from dismantling pipes to manual emptying, significantly reducing maintenance time. The overall structure eliminates all protruding accessories. All functional modules are embedded inside the cabinet or flush with the cabinet surface, allowing for easy wiping like a regular countertop, eliminating the dead corners caused by traditional frames and covers. At the same time, each module uses corrosion-resistant materials and sealed connections, preventing chemical splashes from penetrating the gaps between components and eliminating the need for frequent parts replacement throughout its lifespan. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is an example diagram of an integrated self-cleaning and exhaust washing cabinet; Figure 2 A side view of an integrated self-cleaning and exhaust-ventilation washing cabinet; Figure 3 A top view of an integrated self-cleaning and exhaust-ventilation washing cabinet; The attached diagram lists the components represented by each number as follows: 10. Cabinet; 20. Countertop; 30. Sink; 40. Air vent; 50. Drip rack assembly; 51. Drain grille; 52. Exhaust chamber; 60. Trolley. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0028] like Figures 1-3 The image shown is an example diagram of an integrated self-cleaning and exhaust-ventilation washing cabinet provided by this utility model, including a cabinet body 10, a countertop 20, a sink 30, and a drip rack assembly 50, wherein: The basin 30 is embedded in the center of the countertop 20. A ring-shaped slit air intake 40 is arranged around the outer periphery of the opening of the basin 30. The air intake 40 is connected to the laboratory centralized exhaust system or the cabinet 10's own fan through the internal air duct of the cabinet 10. The drip rack assembly 50 is located below the countertop 20 on the horizontal side of the sink 30. Its drain grid 51 can extend vertically out of the countertop 20 or be completely submerged below the countertop 20 under the action of the lifting drive component, and is flush with the surface of the countertop 20 at the submerged position. A trolley 60 is also provided on one side of the bottom of the cabinet 10. The trolley 60 is embedded in the accommodating cavity reserved on the other side of the cabinet 10 in a push-pull manner. The opening of the accommodating cavity is flush with the side panel of the cabinet 10. The bottom plate of the trolley 60 is coplanar with or slightly higher than the bottom plate of the cabinet 10, so that the outer side of the trolley 60 forms a continuous appearance surface with the side of the cabinet 10 when it is pushed in.

[0029] The centralized exhaust system for laboratories refers to the exhaust duct network that is pre-installed in the laboratory building and leads to the roof exhaust fan, serving multiple laboratory rooms in a centralized manner. The internal air duct of the washing cabinet is connected to this duct network through an interface, so that it can share the building control system to achieve unified high-altitude emission of harmful gases without the need to install a fan on the cabinet.

[0030] In the above technical solution, the air intake 40 is a continuous gap that surrounds the water basin 30. The upper edge of the gap is flush with the upper edge of the water basin 30, and the lower edge is sealed to the main exhaust pipe of the cabinet through a pressure equalization air duct.

[0031] Furthermore, in the above technical solution, the drip rack assembly 50 includes a rectangular drain grille 51, an exhaust cavity 52, and a lifting drive component. The exhaust cavity 52 is fixed directly below the drain grille 51 and is sealed and connected to the bottom surface of the drain grille 51. The side wall of the exhaust cavity 52 is connected to the main exhaust duct of the cabinet via a flexible air duct.

[0032] Furthermore, in the above technical solution, the lifting drive component is a vertically arranged linear actuator, with its fixed end installed on the side plate or bottom plate of the cabinet 10, and its movable end fixedly connected to the outer wall of the exhaust cavity 52, so that the drain grille remains horizontal throughout the lifting process.

[0033] Furthermore, in the above technical solution, the trolley 60 includes multi-layer shelves, railings, and casters with brakes. The outer contour of the shelves complements the shape of the opening of the receiving cavity. The height of the railings is not higher than the tabletop 20, so that when the trolley 60 is pushed into position, the edge of its shelves fits the inner surface of the side panel of the cabinet 10 with a gap.

[0034] Furthermore, in the above technical solution, a basket filter that can be disassembled and installed with one hand is provided at the drain outlet of the water basin. The outer wall of the filter and the inner wall of the drain outlet of the water basin are connected by a rotating snap-fit ​​through circumferential ribs.

[0035] Furthermore, in the above technical solution, the cabinet 10 is equipped with a main exhaust duct. The main exhaust duct is arranged vertically along the back panel of the cabinet. Its upstream end is connected in parallel with the air intake 40 and the exhaust cavity 52, and its downstream end is led out from the top or back panel of the cabinet 10 and connected to the laboratory centralized exhaust system.

[0036] Furthermore, in the above technical solution, the upper surface of the drain grid 51 is provided with downward-bent water-blocking flanges around its perimeter, and the lower end of the water-blocking flanges extends into the exhaust cavity 52, so that the dripping liquid is constrained in the exhaust cavity 52 and continuously pumped out.

[0037] Furthermore, in the above technical solution, the bottom plate of the receiving cavity is provided with a positioning groove, and the bottom beam of the trolley 60 is provided with an elastic positioning pin at the corresponding position. The positioning pin engages with the groove at the end point of the push-in to restrict the sliding of the trolley 60.

[0038] Furthermore, in the above technical solution, the countertop 20 has a continuous transition waterproof lip between the sink 30 and the drip rack assembly 50. The height of the waterproof lip is lower than the upper surface of the drain grille 51 after it is raised, so as to prevent liquid from flowing into the lifting gap of the countertop 20.

[0039] First Embodiment: This embodiment uses a fully embedded back panel centralized exhaust system. The cabinet depth is consistent with the experimental bench, and the back panel has a pre-reserved rectangular interface for direct connection to the building's vertical exhaust shaft flange on-site. No additional fan is installed inside the cabinet, and the entire unit has no rotating parts. The water basin is made of one-piece molded PP, with a continuous 3mm slit milled around the outer wall of the upper opening. A pressure equalizing ring of the same material is bonded to the back of the slit, with the top of the ring flush with the ceramic tabletop, creating a visually seamless transition. Downstream of the pressure equalizing ring is a round-to-square transition section, into which the main PVC pipe of the back panel is inserted. The main pipe runs along the back panel from bottom to top, with its upper end extending through the top plate and connecting to the shaft. The lifting drip rack module is located on the right side of the water basin: two stainless steel linear bearing guide rods are fixed below the tabletop, and a stepper motor is hidden inside the right rear column, driving the exhaust cavity vertically back and forth via a synchronous belt. The cavity is a laser-welded stainless steel box, with an O-ring embedded in the upper edge and a drain grille for tight sealing. A Φ50 corrugated pipe is connected to the side wall of the cavity, flowing into the main pipe via a tee on the back panel. The trolley module is located on the left: a rectangular opening is punched out on the side panel of the cabinet, and two elongated oval grooves are milled on the bottom plate of the compartment. Corresponding spring pins are installed on the bottom beam of the trolley. The trolley has two layers: the upper layer is perforated, and the lower layer is solid with an edge. It has casters with brakes. Usage steps: The lab technician first pulls the trolley to the washing position and places a batch of containers in it; then returns to the front of the cabinet and turns on the water valve. The annular slit is simultaneously energized by the linkage switch, and the negative pressure of the building's exhaust shaft is drawn to the edge of the basin. During the washing process, steam is visibly drawn horizontally into the slit; after washing, the containers are moved to the raised drain grille, and residual droplets are instantly drawn away by the negative pressure of the cavity; after draining, the button is pressed down, the grille disappears into the countertop, the trolley is pushed back into the compartment, the spring pins retract, and the side of the cabinet returns to a flat state. Applicable scenarios: Newly built experimental buildings equipped with roof fans and vertical exhaust shafts, requiring multiple washing cabinets to operate simultaneously, demanding zero noise from individual units, and wishing to eliminate the need for maintenance of the cabinet's top fan in open experimental areas.

[0040] The entire machine has no powered parts, eliminating the need for lifetime fan replacement; the back panel has a single main pipe connecting two exhaust channels in parallel, ensuring symmetrical pressure loss and automatic airflow balance; the trolley and lifting module are all concealed within the cabinet's outline, eliminating any obstruction to the passageway; washing, draining, and temporary storage are all completed on the same facade, halving the distance personnel need to move, increasing batch washing efficiency by more than 30%, and continuously removing harmful vapors below the breathing zone, resulting in indoor background concentrations significantly lower than occupational health limits.

[0041] Second Embodiment: This embodiment adopts a cabinet with a built-in variable frequency fan, designed for the renovation of old buildings without centralized exhaust ventilation. The cabinet back panel no longer has openings; instead, a 200mm high equipment compartment is left below the base plate, housing a low-noise plastic centrifugal fan. The fan inlet is directly connected to the main pipe on the back panel via a flexible connector, and the outlet extends horizontally through the base plate via a silencer duct. Only a round hole needs to be drilled at the base for a temporary exhaust pipe connection. The structure of the water basin slit, equalizing ring, and main pipe is the same as in Embodiment 1, but the lower end of the main pipe extends to the equipment compartment and connects to the fan inlet, forming an independent negative pressure source. The fan has a built-in variable frequency drive, and the small panel on the front of the cabinet allows for three-speed adjustment, enabling the laboratory to adjust the airflow in real time according to the steam concentration. The lifting drip rack is driven by a hand-cranked screw mechanism: a small rotating handle is embedded in the front right corner of the tabletop. The handle drives the vertical screw via a bevel gear, and a copper nut is fixed to the back of the exhaust chamber. Rotating the handle allows the chamber and grille to be raised and lowered smoothly. It can still be operated during power outages, making it suitable for explosion-proof environments. The trolley module has been moved to the right side. The bottom plate of the receiving cavity no longer has positioning pins, but instead uses magnetic strips. Iron strips are embedded in the trolley's bottom beam; it is magnetically attached and fixed when pushed in, and pulled out with moderate force, allowing for one-handed operation. Usage steps: The lab technician first selects the fan speed based on the day's reagent volatility; during cleaning, steam is captured by the slits and enters the fan through the main pipe, then is exhausted outdoors through the bottom silenced duct; during the drying stage, the fan is kept at a low speed to maintain negative pressure in the cavity; after get off work, the fan can be turned off, the drip rack moved to a hidden position, and the trolley stored in the cabinet. Applicable scenarios: Teaching and experimental buildings built in the last century, where the roof lacks a centralized exhaust shaft, and there are fewer experiments at night with intermittent exhaust needs. Each cabinet needs to independently handle steam discharge, with noise levels lower than indoor conversation, and the drip rack can still be manually raised and lowered during occasional power outages.

[0042] The self-contained fan solution requires no damage to the existing building risers; it only needs to pass through the nearest wall for exhaust, reducing the renovation cycle from one week to one day. The low-frequency operation is close to ambient noise, ensuring that nighttime experiments do not disturb the teaching area. The hand-cranked screw lift eliminates the need for a motor, remaining reliable even in explosion-proof, power outage, and humid environments. The magnetic trolley allows for true one-handed reset, allowing lab technicians to easily push and store containers with their feet. Within the scope of the claims, only the drive and air source forms are changed; the core functions of annular slit source capture, drip concealment, and embedded transport are retained. This allows older laboratories without centralized exhaust systems to achieve the combined benefits of source cleaning and contamination control, freeing up workspace, and shortening operational workflows.

[0043] Specifically, the principle of this invention is as follows: This invention achieves zero contamination diffusion, zero external occupation of functions, and zero maintenance tools during the washing process through the synergy of three principles: fluid organization, mechanical lifting, and space sharing. The annular slit suction port utilizes the wall-attachment effect to form a continuous negative pressure curtain at the mouth of the water basin. This negative pressure curtain has a uniform velocity field and stable flow direction. When steam molecules rise from the liquid surface, they are instantly drawn into the slit and then flow into the laboratory's centralized exhaust system through the main exhaust duct of the cabinet. Since the slit and the water basin are integrally formed, the suction area overlaps with the cleaning area, and the steam is removed before it diffuses into the breathing zone. Therefore, high collection efficiency can be achieved without the need for an additional external exhaust hood. The liftable drip rack utilizes a vertical linear drive principle. The lifting mechanism is fixed to the cabinet side panel, with the movable end connected to the exhaust chamber. A drain grille is sealed above the exhaust chamber, forming a rigid frame. When raised, the chamber remains connected to the flexible duct. Liquid dripping from the grille falls to the bottom of the chamber under gravity and is carried into the exhaust duct by the continuously downward airflow, achieving simultaneous gas and liquid removal and preventing liquid accumulation or secondary evaporation inside the cabinet. When lowered, the mechanism self-locks below the countertop, with magnetic fasteners or mechanical latches ensuring that transport vibrations will not cause accidental slippage. The overall cross-section is flush with the countertop, making it visually appealing and easy to clean like a regular countertop. The embedded trolley utilizes a "shared volume" principle. The pre-reserved cavity on the side of the cabinet becomes part of the cabinet side panel when the trolley is pushed in, and transforms into a movable worktable when the trolley is pulled out. The cavity bottom plate has a positioning groove, and the trolley's bottom beam has an elastic positioning pin. The pin engages at the end of the push-in, achieving tool-free quick locking. The casters are equipped with brakes to ensure reliable switching between parking and movement modes. The main and exhaust ducts are arranged vertically with a back panel, forming a parallel "main-branch" topology. The annular air intake and the drip rack exhaust chamber are symmetrically connected to the main branch as two branches. The gradually changing cross-sectional area of ​​the ducts ensures resistance balance between the two branches and avoids airflow competition. All interfaces use a sealing ring and clamp structure, which can withstand corrosion from common laboratory solvents and allows for single-person manual disassembly and assembly. The drain basket filter uses a rotating snap-fit ​​principle. The outer wall of the filter has circumferential ribs. After aligning with the drain outlet notch, a gentle twist locks it in place, and a reverse twist removes it. After solid waste is emptied, it can be directly rinsed and reset. The entire process does not require a wrench or screwdriver.

Claims

1. An integrated self-cleaning and exhaust-ventilated washing cabinet, comprising a cabinet body, a countertop, a sink, and a drip rack assembly, characterized in that: The basin is embedded in the center of the countertop, and an annular slit air intake is arranged around the outer perimeter of the basin opening. The air intake is connected to the laboratory's centralized exhaust system or the cabinet's own fan through the internal air duct of the cabinet. The drip rack assembly is located below the countertop on the horizontal side of the basin. Its drain grid can extend vertically out of the countertop or be completely submerged below the countertop under the action of the lifting drive, and is flush with the countertop surface at the submerged position. A trolley is also provided on one side of the bottom of the cabinet. The trolley is embedded in the cavity reserved on the other side of the cabinet in a push-pull manner. The opening of the cavity is flush with the side panel of the cabinet. The bottom plate of the trolley is coplanar with or slightly higher than the bottom plate of the cabinet, so that the outer side of the trolley forms a continuous appearance surface with the side of the cabinet when it is pushed in.

2. The integrated self-cleaning and exhaust-ventilation washing cabinet according to claim 1, characterized in that, The air intake is a continuous slit that surrounds the water basin. The upper edge of the slit is flush with the upper edge of the water basin, and the lower edge is sealed to the main exhaust pipe of the cabinet through a pressure equalization duct.

3. The integrated self-cleaning and exhaust-ventilation washing cabinet according to claim 2, characterized in that, The drip rack assembly includes a rectangular drain grid, an exhaust cavity, and a lifting drive component. The exhaust cavity is fixed directly below the drain grid and sealed to the bottom surface of the drain grid. The side wall of the exhaust cavity is connected to the main exhaust duct of the cabinet via a flexible duct.

4. The integrated self-cleaning and exhaust-ventilation washing cabinet according to claim 3, characterized in that, The lifting drive component is a vertically arranged linear actuator. Its fixed end is installed on the side plate or bottom plate of the cabinet, and its movable end is fixedly connected to the outer wall of the exhaust cavity, so that the drain grille remains horizontal throughout the lifting process.

5. An integrated self-cleaning and exhaust-ventilation washing cabinet according to claim 4, characterized in that, The trolley includes multi-layered shelves, railings, and casters with brakes. The outer contour of the shelves complements the shape of the cavity opening. The height of the railings is no higher than the tabletop, so that when the trolley is pushed into position, the edge of the shelves fits the inner surface of the cabinet side panel with a clearance.

6. An integrated self-cleaning and exhaust-ventilation washing cabinet according to claim 5, characterized in that, The basin drain outlet is equipped with a basket filter that can be disassembled and installed with one hand. The outer wall of the filter and the inner wall of the basin drain outlet are connected by a rotating buckle through circumferential ribs.

7. An integrated self-cleaning and exhaust-ventilation washing cabinet according to claim 6, characterized in that, The cabinet is equipped with a main exhaust duct, which is arranged vertically along the back panel of the cabinet. Its upstream end is connected in parallel with both the air intake and the exhaust cavity, and its downstream end is led out from the top or back panel of the cabinet and connected to the laboratory's centralized exhaust system.

8. An integrated self-cleaning and exhaust-ventilation washing cabinet according to claim 7, characterized in that, The upper surface of the drain grid is provided with downward-bent water-blocking flanges around its perimeter. The lower end of the water-blocking flanges extends into the exhaust cavity, so that the dripping liquid is confined in the exhaust cavity and continuously pumped out.

9. An integrated self-cleaning and exhaust-ventilation washing cabinet according to claim 8, characterized in that, The bottom plate of the receiving cavity is provided with a positioning groove, and the corresponding position of the trolley bottom beam is provided with an elastic positioning pin. The positioning pin engages with the groove at the end point of the push-in to limit the trolley from sliding.

10. An integrated self-cleaning and exhaust-ventilation washing cabinet according to claim 9, characterized in that, The countertop has a continuous, waterproof lip between the sink and the drip rack assembly. The height of the waterproof lip is lower than the upper surface of the drain grille after it is raised, to prevent liquid from flowing into the lifting gap.

Images