A new type of super-clean fume hood

Abstract

The utility model discloses a novel super clean ventilation cabinet, including cabinet body and FFU, the chamber in the cabinet body is provided with the fairlead, and the fairlead divides the chamber into the purification chamber and the ventilation corridor that do not communicate with each other in front and back, the FFU is provided with in the cabinet body and is located the upper portion of purification chamber, and the front side of purification chamber is provided with the operating mouth, and the upper portion is provided with the air inlet that communicates with the FFU, the lower portion of purification chamber is provided with the exhaust box, and the purification chamber communicates with the ventilation corridor through the exhaust box, and the hole plate is set up between the purification chamber and the exhaust box, and the one end of ventilation corridor is away from the exhaust box and communicates with the exhaust port of cabinet upper end, and the cleaning device is set up in the ventilation corridor and the exhaust box, and the cleaning device is used for washing and cleaning the exhaust box and ventilation corridor, and the control module is set up on the cabinet body, and the control module is electrically connected with the cleaning device and FFU, the utility model discloses the ventilation cabinet control pollution backflow, make the purification chamber satisfy the clean requirement, and protect the sample and be not contaminated, and moreover ensure the cleanliness of ventilation corridor and exhaust box through the cleaning device.

Description

Technical Field

[0001] This utility model relates to the field of laboratory technology, and in particular to a novel ultra-clean fume hood. Background Technology

[0002] Existing fume hoods often employ an exhaust structure at the top of the purification chamber. The exhaust airflow flows from the operating window into the purification chamber, then flows upward through the guide plate inside the chamber to the top exhaust port for discharge. This can easily stir up dust particles or gaseous pollutants on the purification chamber table, contaminating the samples being processed. Over time, pollutants can accumulate inside the back panel and side panels. If there is no exhaust, these pollutants may return to the fume hood purification chamber due to gravity, causing backflow contamination and affecting experimental results.

[0003] Therefore, in order to solve the above problems, an ultra-clean fume hood that meets cleanliness requirements and protects samples from contamination needs to be developed. Utility Model Content

[0004] To solve the above problems, the technical solution adopted by this utility model is as follows: A novel ultra-clean fume hood is characterized by comprising a cabinet body and an FFU (Fan Filter Unit), wherein a baffle plate is provided in the cavity of the cabinet body, and the baffle plate divides the cavity into a purification chamber and a ventilation duct that are not interconnected at the front and rear. The cabinet is equipped with an FFU located above the purification chamber; The purification chamber has an operation port on the front and an air inlet connected to the FFU on the top. An exhaust box is provided below the purification chamber, and the purification chamber is connected to the ventilation duct through the exhaust box; A detachable perforated plate is provided between the purification chamber and the exhaust box; The operating port is equipped with a height-adjustable viewing window; The end of the ventilation duct away from the exhaust box is connected to the exhaust port at the top of the cabinet; The ventilation duct and exhaust box are equipped with cleaning devices; The cleaning device is used to rinse and clean the exhaust box and ventilation duct; The cabinet is equipped with a control module, which is electrically connected to the cleaning device and the FFU.

[0005] Preferably, a storage cavity is provided on the cabinet below the chamber; The exhaust box is located inside the storage cavity; The cleaning device includes a pressure pump, a main spray pipe, and multiple first porous pipes; The main sprinkler pipe is installed in the ventilation duct, with its upper end extending above the ventilation duct and its lower end passing through the exhaust box and connected to the water source via a pressure pump. Multiple first porous tubes are arranged from top to bottom in the ventilation duct. The first porous tubes are arranged horizontally and are connected to the main spray pipe in the middle. The first porous tube has spray holes distributed in 360 degrees; The pressurization pump is located inside the storage cavity; The bottom surface of the exhaust box is provided with a drainage interface.

[0006] Preferably, the cleaning device further includes a spray branch pipe, a three-way solenoid valve, and a second multi-hole pipe disposed in the exhaust box; One end of the spray branch pipe is connected to the main spray pipe via a three-way solenoid valve, and the other end is connected to the middle of the second perforated pipe. The second porous tube has multiple spray holes on its surface away from the orifice plate.

[0007] Preferably, the cleaning device further includes an exhaust fan located at the exhaust vent.

[0008] Preferably, a sensor for detecting the internal cleanliness is provided inside the ventilation duct; The sensor is electrically connected to the control module.

[0009] Preferably, the front side of the cabinet is provided with a control panel that is electrically connected to the control module.

[0010] Preferably, a baffle is provided on the front side of the cabinet at the FFU installation position; The baffle is connected to the cabinet via a quick-release buckle.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model features an FFU (Fan Filter Unit) installed above the purification chamber, connected to the rear ventilation duct via an exhaust box below. During operation, the FFU blows purified air into the purification chamber from above, forcing a downward airflow within the chamber. The airflow passes through a perforated plate on the tabletop and then exits sequentially through the exhaust box and ventilation duct. This prevents dust particles or gaseous pollutants from being stirred up or adhering to the side panels of the purification chamber, and also removes dust particles or gaseous pollutants from the purification chamber. This controls backflow of contaminants, ensuring the purification chamber meets cleanliness requirements and protecting the samples from contamination.

[0012] 2. By installing cleaning devices in the ventilation ducts and exhaust boxes, the ventilation ducts and exhaust boxes can be flushed and cleaned to ensure their cleanliness and prevent pollutants in the ventilation ducts from entering the purification chamber when the fume hood is not in operation, thus affecting the cleanliness of the purification chamber. Attached Figure Description

[0013] Figure 1 This is the front view of the present invention; Figure 2 This is the right view of the present invention; Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure of the middle AA section; The components include: cabinet 1, FFU 2, purification chamber 3, ventilation duct 4, exhaust box 5, perforated plate 6, viewing window 7, cleaning device 8, storage chamber 9, sensor 10, control panel 20, baffle 30, guide plate 40, operation port 11, air inlet 12, air outlet 13, drainage interface 51, pressurization pump 81, main spray pipe 82, first perforated pipe 83, spray branch pipe 84, three-way solenoid valve 85, second perforated pipe 86, and exhaust fan 87. Detailed Implementation

[0014] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0015] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," "up," "down," "front," "back," and similar expressions used in this document are for illustrative purposes only.

[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0017] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments: like Figure 1-3 As shown, a novel ultra-clean fume hood includes a cabinet body 1 and an FFU 2. A baffle plate 40 is provided in the cavity of the cabinet body 1, which divides the cavity into a purification chamber 3 and a ventilation duct 4 that are not connected to each other. The cabinet 1 is equipped with an FFU2 located above the purification chamber 3; The purification chamber 3 has an operation port 11 on the front side and an air inlet 12 connected to the FFU2 on the top. An exhaust box 5 is provided below the purification chamber 3, and the purification chamber 3 is connected to the ventilation duct 4 through the exhaust box 5. A detachable perforated plate 6 is provided between the purification chamber 3 and the exhaust box 5; The operating port 11 is equipped with a height-adjustable viewing window 7; The end of the ventilation duct 4 away from the exhaust box 5 is connected to the exhaust port 13 at the top of the cabinet 1; Cleaning devices 8 are installed in the ventilation duct 4 and the exhaust box 5; The cleaning device 8 is used to rinse and clean the exhaust box 5 and the ventilation duct 4. The cabinet 1 is equipped with a control module (not shown in the figure), which is electrically connected to the cleaning device 8 and FFU2.

[0018] In this embodiment, an FFU2 is installed above the purification chamber 3, and the lower part is connected to the ventilation duct 4 on the rear side through an exhaust box 5. During operation, the FFU2 blows in purified air from above the purification chamber 3, forcing the purification chamber 3 to form an airflow from top to bottom. The airflow passes through the perforated plate 6 on the table and then passes through the exhaust box 5 and the ventilation duct 4 in sequence before being discharged. This prevents dust particles or gaseous pollutants in the purification chamber 3 from being stirred up and attached to the side plate of the purification chamber 3, and can also remove dust particles or gaseous pollutants from the purification chamber 3. In summary, this fume hood controls the backflow of contaminants, ensuring that the purification chamber 3 meets cleanliness requirements and protecting the samples from contamination.

[0019] In this embodiment, during the test, the viewing window 7 is open, and a person reaches in to operate it; although outside air can enter the purification chamber 3 through the opening of the operating port 11, the airflow is relatively small and will be sucked into the perforated plate 6 on the front side, having little impact on the middle area.

[0020] In this embodiment, the operation of FFU2 and cleaning device 8 can be controlled according to whether the fume hood is used or not, through the setting of the control module.

[0021] Furthermore, such as Figure 1-3 As shown, a storage cavity 9 is provided on the cabinet 1 below the chamber; The exhaust box 5 is located inside the storage cavity 9; The cleaning device 8 includes a pressure pump 81, a spray main pipe 82, and a plurality of first porous pipes 83; The main spray pipe is located in the ventilation duct 4, with its upper end extending above the ventilation duct 4 and its lower end passing through the exhaust box 5 and then connected to the water source via the pressure pump 81. Multiple first porous tubes 83 are arranged from top to bottom in the ventilation duct 4. The first porous tubes 83 are arranged horizontally and are connected to the spray main tube 82 in the middle. The first porous tube 83 has spray holes distributed in 360 degrees; The pressure pump 81 is installed inside the storage cavity 9; The bottom surface of the exhaust box 5 is provided with a drainage interface 51.

[0022] In this embodiment, when the cleaning device 8 is started, no experimental work is performed; the water source is pumped to the spray main pipe by the pressurization pump 81 and then delivered to the first porous pipe 83 at different heights. Then, high-pressure water is sprayed out through the spray holes 360 degrees to thoroughly rinse and clean the side walls of the ventilation duct 4. The wastewater generated during cleaning is concentrated in the exhaust box 5 and then discharged to the outside through the drain interface 51, thereby ensuring the cleanliness of the ventilation duct 4 and preventing pollutants in the ventilation duct 4 from entering the purification chamber 3 when the fume hood is not working, thus affecting the cleanliness of the purification chamber 3.

[0023] Furthermore, such as Figure 1-3 As shown, the cleaning device 8 also includes a spray branch pipe 84, a three-way solenoid valve 85, and a second perforated pipe 86 disposed in the exhaust box 5. One end of the spray branch pipe 84 is connected to the spray main pipe 82 via a three-way solenoid valve 85, and the other end is connected to the middle of the second porous pipe 86. The second porous tube 86 has multiple spray holes on its surface away from the orifice plate 6.

[0024] In this embodiment, the three-way solenoid valve 85 can be controlled by the control module to flush and clean the ventilation duct 4 and the exhaust box 5 respectively, thereby ensuring the cleanliness of the ventilation duct 4 and the exhaust box 5.

[0025] Furthermore, such as Figure 1-3 As shown, in order to remove residual water from the ventilation duct 4 and exhaust box 5 after rinsing and ensure that they are thoroughly rinsed, the cleaning device 8 also includes an exhaust fan 87 located at the exhaust port 13.

[0026] In this embodiment, after the ventilation duct 4 and exhaust box 5 are flushed, the pressurization pump 81 stops working, and the exhaust fan 87 and FFU2 start simultaneously, using the generated circulating air to dry the residual water in the ventilation duct 4 and exhaust box 5.

[0027] Furthermore, such as Figure 1-3 As shown, in order to automatically flush and clean the ventilation duct 4 and exhaust box 5 when the fume hood is not in use, a sensor 10 for detecting the internal cleanliness is installed in the ventilation duct 4. The sensor 10 is electrically connected to the control module.

[0028] Furthermore, such as Figure 1-3As shown, in order to improve the ease of operation and practicality, a control panel 20 electrically connected to the control module is provided on the front side of the cabinet 1.

[0029] Furthermore, such as Figure 1-3 As shown, in order to facilitate the maintenance and disassembly of FFU, a baffle 30 is provided on the front side of the cabinet 1 at the installation position of FFU2; The baffle 30 is connected to the cabinet 1 by a quick-release buckle.

[0030] For those skilled in the art, various other corresponding changes and modifications can be made based on the technical solutions and concepts described above, and all such changes and modifications should fall within the protection scope of the claims of this utility model patent.

Claims

1. A novel cleanroom fume hood, characterized in that, It includes a cabinet and an FFU (Fan Filter Unit). The cabinet is equipped with a baffle plate inside its cavity, which divides the cavity into a purification chamber and a ventilation duct that are not connected to each other. The cabinet is equipped with an FFU located above the purification chamber; The purification chamber has an operation port on the front and an air inlet connected to the FFU on the top. An exhaust box is provided below the purification chamber, and the purification chamber is connected to the ventilation duct through the exhaust box; A detachable perforated plate is provided between the purification chamber and the exhaust box; The operating port is equipped with a height-adjustable viewing window; The end of the ventilation duct away from the exhaust box is connected to the exhaust port at the top of the cabinet; The ventilation duct and exhaust box are equipped with cleaning devices; The cleaning device is used to rinse and clean the exhaust box and ventilation duct; The cabinet is equipped with a control module, which is electrically connected to the cleaning device and the FFU.

2. The novel ultra-clean fume hood according to claim 1, characterized in that, A storage cavity is provided on the cabinet below the chamber; The exhaust box is located inside the storage cavity; The cleaning device includes a pressure pump, a main spray pipe, and multiple first porous pipes; The main sprinkler pipe is installed in the ventilation duct, with its upper end extending above the ventilation duct and its lower end passing through the exhaust box and connected to the water source via a pressure pump. Multiple first porous tubes are arranged from top to bottom in the ventilation duct. The first porous tubes are arranged horizontally and are connected to the main spray pipe in the middle. The first porous tube has spray holes distributed in 360 degrees; The pressurization pump is located inside the storage cavity; The bottom surface of the exhaust box is provided with a drainage interface.

3. A novel cleanroom fume hood according to claim 2, characterized in that, The cleaning device also includes a spray branch pipe, a three-way solenoid valve, and a second multi-hole pipe installed in the exhaust box. One end of the spray branch pipe is connected to the main spray pipe via a three-way solenoid valve, and the other end is connected to the middle of the second perforated pipe. The second porous tube has multiple spray holes on its surface away from the orifice plate.

4. A novel cleanroom fume hood according to claim 3, characterized in that, The cleaning device also includes an exhaust fan located at the exhaust vent.

5. A novel cleanroom fume hood according to claim 3, characterized in that, The ventilation duct is equipped with a sensor for detecting the internal cleanliness. The sensor is electrically connected to the control module.

6. A novel cleanroom fume hood according to claim 1, characterized in that, The front of the cabinet is equipped with a control panel that is electrically connected to the control module.

7. A novel cleanroom fume hood according to claim 1, characterized in that, A baffle is provided on the front side of the cabinet where the FFU is installed; The baffle is connected to the cabinet via a snap-fit ​​fastener.

Images