Non-pipe self-cleaning ventilation cabinet
By introducing a rotatable baffle and limiting components into the fume hood, the problem of dust entering the operating port of the traditional fume hood is solved, achieving self-purification and gas purification, and improving laboratory environmental hygiene and equipment efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUHAN KEBEI TECH
- Filing Date
- 2025-05-13
- Publication Date
- 2026-05-05
AI Technical Summary
Traditional fume hoods lack protective structures at the operating openings, allowing external dust to easily enter the cabinet and affect laboratory hygiene.
Design a ductless self-cleaning fume hood with a transparent front window, a rotatable baffle, and a limiting component. The baffle can be rotated to an unobstructed state during the experiment for easy operation, and rotated back to the obstructed state after the experiment to prevent dust from entering. It achieves self-cleaning by combining with a ductless exhaust purification device.
It effectively blocks external dust from entering the cabinet, ensuring a hygienic laboratory environment, and achieves gas purification through a ductless exhaust purification device, reducing the length of the air path and the size of the equipment.
Smart Images
Figure CN224195563U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of experimental instrument technology, and in particular to a tubeless self-cleaning fume hood. Background Technology
[0002] In chemical laboratories, researchers typically conduct experiments in fume hoods. Due to the diversity and uncertainty of these experiments, which involve a large amount of odorous and toxic gases, it is essential to ventilate and exhaust the fume hoods to ensure the health of laboratory personnel.
[0003] Currently, traditional fume hoods used in laboratories require ductwork for ventilation and exhaust, and the exhaust gas is treated uniformly after passing through a waste gas collector. The operating room of the hood has a transparent front window for easy observation, and an operating port is opened on the transparent front window for reaching into the operating room to perform related operations. The operating port lacks a protective structure, which makes it easy for external dust to enter the hood through the operating port when the hood is not in use. Utility Model Content
[0004] In view of this, it is necessary to provide a ductless self-cleaning fume hood that can prevent external dust from entering the interior of the hood.
[0005] This utility model provides a ductless self-cleaning fume hood, comprising:
[0006] The cabinet body has no cover at the front end;
[0007] A transparent front window is fixed to the front end of the cabinet, and an operating hole is provided on the transparent front window;
[0008] A baffle plate, rotatably connected to the transparent front window, has a blocked state that obstructs the operating hole and an unobstructed state that allows the operating hole to communicate with the outside; and
[0009] A limiting component, fixed to the transparent front window, has an operable limiting part that can restrict the sash plate from rotating relative to the transparent front window, maintain the unobstructed state, and allow the sash plate to rotate relative to the transparent front window and switch between the obstructed state and the unobstructed state.
[0010] In other embodiments, the shield includes a shielding body and a limiting part, the shape of the shielding body matches the shape of the operating hole, the shielding body is rotatably connected to the transparent front window, and the limiting part is connected to the shielding body and protrudes relative to the shielding body.
[0011] In other embodiments, the limiting component includes a guide frame and a lifting member. The guide frame is fixed on the transparent front window, and the lifting member is slidably disposed on the guide frame and operable to rise and fall along the guide frame. The lifting member extends to form a limiting portion that matches the limited portion and an operable operating end.
[0012] In other embodiments, the limited portion is in the shape of a circular plate, and the limiting portion is an arc-shaped plate that matches the outer peripheral surface of the limited portion.
[0013] In other embodiments, the guide frame has a guide hole, and the limiting part passes through the guide hole.
[0014] In other embodiments, the limiting component further includes an elastic element, which is arranged vertically, with one end fixed to the guide frame and the other end fixed to the lifting component. The elastic element is used to apply a downward force along the guide hole to the lifting component.
[0015] In other embodiments, the interior of the cabinet forms an experimental operating space, and an exhaust vent is provided on the top of the cabinet, which is connected to the experimental operating space.
[0016] In other embodiments, an exhaust purification device is also included. The exhaust purification device is fixed to the top of the cabinet and communicates with the exhaust port. The exhaust purification device is used to assist the exhaust port in venting and to purify the discharged gas.
[0017] In other embodiments, the exhaust purification device includes a purification box, a purification layer, and several exhaust fans. The purification box is an open box with a top and bottom, fixed to the cabinet. The internal space of the purification box is connected to the internal space of the cabinet. The purification layer is fixed inside the internal space of the purification box. The exhaust fans 53 are fixed on the inner wall of the purification box and located above the purification layer.
[0018] In other embodiments, the elastic element is a spring, one end of which is fixed to the guide frame and the other end of which is fixed to the lifting element.
[0019] The beneficial effects of this utility model are as follows:
[0020] This utility model includes a cabinet, a transparent front window, a baffle plate, and a limiting component. The front end of the cabinet is uncovered. The transparent front window is fixed to the front end of the cabinet and has an operating hole. The baffle plate is rotatably connected to the transparent front window and has a blocked state that blocks the operating hole and an unblocked state that allows the operating hole to communicate with the outside. The limiting component is fixed to the transparent front window and has an operable limiting part. The limiting part can restrict the rotation of the baffle plate relative to the transparent front window, maintain the unblocked state, allow the baffle plate to rotate relative to the transparent front window, and switch between the blocked state and the unblocked state. When an experiment is required, the shield is rotated relative to the transparent front window to switch to the unshielded state. Simultaneously, the limiting component is operated to restrict the shield's rotation, maintaining it in the unshielded state. The user can then insert their hand into the cabinet through the operating hole to conduct chemical experiments. After the experiment, the limiting component is operated to release the shield, allowing it to rotate relative to the transparent front window, switching it from the unshielded state to the shielded state, blocking the operating hole and preventing external dust from entering the cabinet. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments 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.
[0022] Figure 1 This is a schematic diagram of the ductless self-cleaning fume hood of this utility model;
[0023] Figure 2 for Figure 1 A structural schematic diagram of the central transparent front window, the blind, and the limiting components;
[0024] Figure 3 for Figure 1 A structural schematic diagram of the central baffle and limiting components;
[0025] Figure 4 for Figure 1 Schematic diagram of the internal structure of the exhaust gas purification device;
[0026] Wherein: 1 - Cabinet;
[0027] 2- Transparent front window, 21- Operating hole;
[0028] 3-Baffle plate, 31-Baffle body, 32-Limited part;
[0029] 4-Limiting component, 41-Guide frame, 411-Guide hole, 42-Lifting component, 421-Limiting part, 43-Elastic component;
[0030] 5-Exhaust purification device; 51-Purification chamber; 52-Purification layer; 53-Exhaust fan. Detailed Implementation
[0031] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.
[0032] like Figure 1-4 As shown, an embodiment of this utility model provides a ductless self-cleaning fume hood, which includes: a cabinet body 1, a transparent front window 2, a baffle plate 3, and a limiting component 4. The front end of the cabinet body 1 is uncovered. The transparent front window 2 is fixed to the front end of the cabinet body 1 and has an operation hole 21. The baffle plate 3 is rotatably connected to the transparent front window 2 and has a blocked state that blocks the operation hole 21 and an unblocked state that allows the operation hole 21 to communicate with the outside. The limiting component 4 is fixed to the transparent front window 2 and has an operable limiting part. The limiting part can restrict the rotation of the baffle plate 3 relative to the transparent front window 2, maintain the unblocked state, and allow the baffle plate 3 to rotate relative to the transparent front window 2 and switch between the blocked state and the unblocked state.
[0033] In this invention, the shielding plate 3 is rotatably connected to the transparent front window 2, and the limiting component 4 is fixed to the transparent front window 2. It has an operable limiting part. When an experiment is required, the shielding plate 3 is rotated relative to the transparent front window 2 to switch to the unshielded state. Simultaneously, the limiting component 4 is operated to restrict the rotation of the shielding plate 3, maintaining its current unshielded state. The user can then insert their hand into the cabinet 1 through the operating hole 21 to conduct chemical experiments. After the experiment is completed, the limiting component 4 is operated to release the shielding plate 3, allowing it to rotate relative to the transparent front window 2, switching from the unshielded state to the shielded state, blocking the operating hole 21 and preventing external dust from entering the cabinet 1.
[0034] Specifically, the interior of the cabinet 1 forms an experimental operating space, and the top of the cabinet 1 is provided with an exhaust vent, which is connected to the experimental operating space. Gas generated in the experimental operating space can be discharged through the exhaust vent.
[0035] Furthermore, it also includes an exhaust purification device 5, which is fixed to the top of the cabinet 1 and communicates with the exhaust hole. The exhaust purification device 5 is used to assist the exhaust hole in venting and to purify the exhaust gas.
[0036] Furthermore, the exhaust purification device 5 includes a purification chamber 51, a purification layer 52, and several exhaust fans 53. The purification chamber 51 is an open-top-bottom chamber fixed to the cabinet 1, and its internal space communicates with the internal space of the cabinet 1. The purification layer 52 is fixed within the internal space of the purification chamber 51, and the exhaust fans 53 are fixed to the inner wall of the purification chamber 51 and located above the purification layer 52. Gas generated in the cabinet 1 during the experiment enters the interior of the purification chamber 51 through the exhaust port, is purified by the purification layer 52, and is then accelerated by the exhaust fans 53 and discharged from the top of the purification chamber 51.
[0037] It should be noted that the exhaust purification device 5 adopts a tubeless design, which can effectively reduce the volume of the tubeless self-cleaning fume hood and the length of the air duct.
[0038] Specifically, the transparent front window 2 is made of transparent material, which allows the experimenter to observe the experimental situation inside the cabinet 1 through the transparent front window 2.
[0039] Specifically, the shield 3 includes a shielding body 31 and a limiting part 32. The shape of the shielding body 31 matches the shape of the operating hole 21. The shielding body 31 is rotatably connected to the transparent front window 2. The limiting part 32 is connected to the shielding body 31 and protrudes relative to the shielding body 31. When the limiting part 32 contacts the limiting component 4, it restricts the shield 3 from rotating relative to the transparent front window 2 and maintains the non-shielding state.
[0040] Specifically, the limiting component 4 includes a guide frame 41 and a lifting member 42. The guide frame 41 is fixed to the transparent front window 2, and the lifting member 42 is slidably disposed on the guide frame 41 and can be operated to rise and fall along the guide frame 41. The lifting member 42 extends to form a limiting part 421 that matches the limited part 32 and an operable operating end. In use, the experimenter operates the operating end to make the lifting member 42 rise and fall along the guide frame 41, so that the limiting part 421 contacts the limited part 32, restricting the movement of the limited part 32 and the blocking body 31, thereby maintaining the unblocked state of the blocking plate 3.
[0041] Furthermore, the restricted portion 32 is circular, and correspondingly, the limiting portion 421 is an arc-shaped piece that matches the outer peripheral surface of the restricted portion 32. When the limiting portion 421 contacts the restricted portion 32, it restricts the movement of the restricted portion 32 and the blocking body 31 to maintain the non-blocking state of the blocking plate 3.
[0042] Furthermore, a guide hole 411 is provided on the guide frame 41, and the limiting part 421 passes through the guide hole 411. The function of the guide hole 411 is to guide the raising and lowering of the limiting part 421.
[0043] Furthermore, the limiting component 4 also includes an elastic element 43, which is arranged vertically. One end of the elastic element 43 is fixed to the guide frame 41, and the other end is fixed to the lifting component 42. The elastic element 43 is used to apply a downward force along the guide hole 411 to the lifting component 42. The purpose of providing the elastic element 43 is to apply a downward force along the guide hole 411 to the lifting component 42, so that the limiting part 421 and the limited part 32 are in close contact, preventing the limiting part 421 and the limited part 32 from accidentally disengaging.
[0044] In this embodiment, the elastic element 43 is a spring, one end of which is fixed to the guide frame 41 and the other end is fixed to the lifting element 42.
[0045] The beneficial effects of this utility model are:
[0046] This utility model includes a cabinet, a transparent front window, a baffle plate, and a limiting component. The front end of the cabinet is uncovered. The transparent front window is fixed to the front end of the cabinet and has an operating hole. The baffle plate is rotatably connected to the transparent front window and has a blocked state that blocks the operating hole and an unblocked state that allows the operating hole to communicate with the outside. The limiting component is fixed to the transparent front window and has an operable limiting part. The limiting part can restrict the rotation of the baffle plate relative to the transparent front window, maintain the unblocked state, allow the baffle plate to rotate relative to the transparent front window, and switch between the blocked state and the unblocked state. When an experiment is required, the shield is rotated relative to the transparent front window to switch to the unshielded state. Simultaneously, the limiting component is operated to restrict the shield's rotation, maintaining it in the unshielded state. The user can then insert their hand into the cabinet through the operating hole to conduct chemical experiments. After the experiment, the limiting component is operated to release the shield, allowing it to rotate relative to the transparent front window, switching it from the unshielded state to the shielded state, blocking the operating hole and preventing external dust from entering the cabinet.
[0047] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model.
Claims
1. A ductless self-cleaning fume hood, characterized in that, include: The cabinet body has no cover at the front end; A transparent front window is fixed to the front end of the cabinet, and an operating hole is provided on the transparent front window; A shield is rotatably connected to the transparent front window and has a shielding state that blocks the operation hole and an unblocking state that allows the operation hole to communicate with the outside. as well as A limiting component, fixed to the transparent front window, has an operable limiting part that can restrict the sash plate from rotating relative to the transparent front window, maintain the unobstructed state, and allow the sash plate to rotate relative to the transparent front window and switch between the obstructed state and the unobstructed state.
2. The ductless self-cleaning fume hood as described in claim 1, characterized in that, The shield includes a shielding body and a limiting part. The shape of the shielding body matches the shape of the operating hole. The shielding body is rotatably connected to the transparent front window. The limiting part is connected to the shielding body and protrudes relative to the shielding body.
3. The ductless self-cleaning fume hood as described in claim 2, characterized in that, The limiting component includes a guide frame and a lifting member. The guide frame is fixed on the transparent front window, and the lifting member is slidably disposed on the guide frame and can be operated to move up and down along the guide frame. The lifting member extends to form a limiting part that matches the limited part and an operable operating end.
4. The ductless self-cleaning fume hood as described in claim 3, characterized in that, The restricted portion is in the shape of a circular plate, and the limiting portion is an arc-shaped plate that matches the outer peripheral surface of the restricted portion.
5. The ductless self-cleaning fume hood as described in claim 3, characterized in that, The guide frame has a guide hole, and the limiting part passes through the guide hole.
6. The ductless self-cleaning fume hood as described in claim 5, characterized in that, The limiting component also includes an elastic element, which is arranged vertically. One end of the elastic element is fixed to the guide frame, and the other end is fixed to the lifting component. The elastic element is used to apply a downward force along the guide hole to the lifting component.
7. The ductless self-cleaning fume hood as described in claim 1, characterized in that, The cabinet has an experimental operating space inside, and an exhaust vent is provided on the top of the cabinet, which is connected to the experimental operating space.
8. The ductless self-cleaning fume hood as described in claim 7, characterized in that, It also includes an exhaust purification device, which is fixed to the top of the cabinet and communicates with the exhaust port. The exhaust purification device is used to assist the exhaust port in venting and to purify the exhaust gas.
9. The ductless self-cleaning fume hood as described in claim 1, characterized in that, The exhaust purification device includes a purification box, a purification layer, and several exhaust fans. The purification box is an open box with a top and bottom, fixed to the cabinet. The internal space of the purification box is connected to the internal space of the cabinet. The purification layer is fixed inside the internal space of the purification box. The exhaust fans 53 are fixed on the inner wall of the purification box and located above the purification layer.
10. The ductless self-cleaning fume hood as described in claim 6, characterized in that, The elastic element is a spring, one end of which is fixed to the guide frame and the other end is fixed to the lifting element.