阅读说明：本技术 适应多种试验的洁净工作台 (Clean workbench suitable for various tests ) 是由 刘磊 于 2020-12-31 设计创作，主要内容包括：本申请涉及一种适应多种试验的洁净工作台,属于空气净化设备的技术领域,其包括底座,底座顶部固定连接有侧板和背板,侧板和背板顶部共同固定连接有顶框,顶框远滑动连接有滑动板和横向杆,横向杆滑动连接有第一导柱,第一导柱固定连接有固定块,滑动板滑动连接有第二导柱,第二导柱固定连接于固定块上；底座固定连接有第一链板和第二链板,底座滑动连接有第一支撑杆和第二支撑杆,第一支撑杆固定连接有第一同步杆,第二支撑杆固定连接有第二同步杆；顶框固定连接有弹力布,弹力布固定连接有固定壳体,固定壳体固定连接于背板上,固定壳体上固定连接有洁净风机,本发明具有能够改变工作区域的大小,适应不同的试验要求的效果。(The application relates to a clean bench suitable for various tests, which belongs to the technical field of air purification equipment and comprises a base, wherein the top of the base is fixedly connected with a side plate and a back plate, the top of the side plate and the top of the back plate are fixedly connected with a top frame together, the top frame is far from and slidably connected with a sliding plate and a transverse rod, the transverse rod is slidably connected with a first guide pillar, the first guide pillar is fixedly connected with a fixed block, the sliding plate is slidably connected with a second guide pillar, and the second guide pillar is fixedly connected to the fixed block; the base is fixedly connected with a first chain plate and a second chain plate, the base is slidably connected with a first supporting rod and a second supporting rod, the first supporting rod is fixedly connected with a first synchronizing rod, and the second supporting rod is fixedly connected with a second synchronizing rod; the top frame is fixedly connected with elastic cloth, the elastic cloth is fixedly connected with a fixed shell, the fixed shell is fixedly connected to the back plate, and the fixed shell is fixedly connected with a clean fan.)

1. The utility model provides a clean bench that adapts to multiple experiment, includes base (1), its characterized in that: the top of the base (1) is fixedly connected with a side plate (11) and a back plate (12) which are vertically arranged, the side plate (11) and the back plate (12) are mutually vertical, the top of the side plate (11) and the top of the back plate (12) are fixedly connected with a top frame (13) together, one side, far away from the side plate (11), of the top frame (13) is connected with a sliding plate (14) in a sliding mode, the sliding plate (14) slides along the length direction of the base (1), the sliding plate (14) is vertically arranged, the sliding plate (14) can be abutted against the base (1), one side, far away from the back plate (12), of the top frame (13) is connected with a transverse rod (15) in a sliding mode, the transverse rod (15) slides along the width direction of the base (1), one end, far away from the side plate (11), of the transverse rod (15), of the transverse rod (151), one end, far away from the, one end, far away from the back plate (12), of the top of the sliding plate (14) is connected with a second guide post (141) in a sliding mode, the second guide post (141) is arranged along the width direction of the base (1), and one end, far away from the sliding plate (14), of the second guide post (141) is fixedly connected with the fixed block (16);

the side, far away from the back plate (12), of the top of the base (1) is fixedly connected with a first chain plate (17), the side, far away from the side plate (11), of the top of the base (1) is fixedly connected with a second chain plate (18), one end, close to the second chain plate (18), of the first chain plate (17) is fixedly connected to the second chain plate (18), the position, corresponding to the bottom of the first chain plate (17), of the base (1) is connected with a first supporting rod (173) in a sliding mode, the first supporting rod (173) is arranged along the length direction of the base (1), the first supporting rod (173) slides along the width direction of the base (1), the first supporting rod (173) abuts against the bottom of the first chain plate (17), the position, corresponding to the bottom of the second chain plate (18), of the base (1) is connected with a second supporting rod (183) in a sliding mode, the second supporting rod (183) is arranged along the length direction, the second supporting rod (183) is abutted to the bottom of the second chain plate (18), the first supporting rod (173) is fixedly connected with a first synchronizing rod (175), the other end of the first synchronizing rod (175) is fixedly connected to the transverse rod (15), the second supporting rod (183) is fixedly connected with a second synchronizing rod (185), and the other end of the second synchronizing rod (185) is fixedly connected to the sliding plate (14);

the top frame (13) is rotatably connected with a first traction rod (131) corresponding to the joint of the back plate (12) and the side plate (11), one end, far away from the fixed block (16), of the sliding plate (14) is rotatably connected with a second traction rod (132), the fixed block (16) is rotatably connected with a third traction rod (133), one end, far away from the fixed block (16), of the transverse rod (15) is rotatably connected with a fourth traction rod (134), the first traction rod (131), the second traction rod (132), the third traction rod (133) and the fourth traction rod (134) are fixedly connected with elastic cloth (135) with elasticity, the elastic cloth (135) surrounds the top frame (13), the transverse rod (15), the tops of the sliding plate (14) and the fixed block (16), one side, far away from the top frame (13), of the elastic cloth (135) is fixedly connected with a fixed shell (136), the fixed shell (136) is fixedly connected to the back plate (12), and, the top frame (13), the sliding plate (14), the transverse rod (15) and the fixed block (16) are connected with a telescopic filtering component (2) together at one side close to the elastic cloth (135).

2. A clean bench adapted for various tests according to claim 1, wherein: filter component (2) are including fixed connection in top frame (13), sliding plate (14), elastic first filter screen (21) that have of top frame (13) one side is close to elasticity cloth (135) one side is kept away from in transverse bar (15) and fixed block (16), sliding plate (14) are corresponded in top frame (13) one side in first filter screen (21), second filter screen (22) of position department fixedly connected with L shape directly over transverse bar (15) and fixed block (16), mesh density is the same with second filter screen (22) under the first filter screen natural state, first filter screen (21) and second filter screen (22) are located elasticity cloth (135), the equal fixedly connected with in second filter screen (22) both ends extends filter screen (23).

3. A clean bench adapted for various tests according to claim 2, wherein: the elastic cloth (135) is fixedly connected with the containing groove body (1351) corresponding to the two ends of the second filter screen (22), and the extending filter screen (23) is slidably connected in the containing groove body (1351).

4. A clean bench adapted for various tests according to claim 1, wherein: one side, far away from the side plate (11), of the top frame (13) is connected with a lateral pull rod (1381) in a sliding mode, the lateral pull rod (1381) is arranged along the length direction of the base (1), the lateral pull rod (1381) slides along the length direction of the base (1), and the sliding plate (14) is fixedly connected to one end, far away from the top frame (13), of the lateral pull rod (1381);

one side of the top frame (13) far away from the back plate (12) is connected with a longitudinal pull rod (1391) in a sliding mode, the longitudinal pull rod (1391) is arranged in the width direction of the base (1), the longitudinal pull rod (1391) slides in the width direction of the base (1), and the transverse rod (15) is fixedly connected to one end, far away from the top frame (13), of the longitudinal pull rod (1391).

5. The clean bench adapted for various tests according to claim 4, wherein: a lateral sliding groove (138) is formed in the position, corresponding to the lateral pull rod (1381), of the top frame (13), the lateral sliding groove (138) is formed in the length direction of the base (1), and the lateral pull rod (1381) is connected into the lateral sliding groove (138) in a sliding mode;

a longitudinal sliding groove (139) is formed in the position, corresponding to the longitudinal pull rod (1391), of the top frame (13), the longitudinal sliding groove (139) is formed in the width direction of the base (1), and the longitudinal pull rod (1391) is connected into the longitudinal sliding groove (139) in a sliding mode;

a first sliding groove (152) is formed in the position, corresponding to the first guide pillar (151), of the transverse rod (15), the first sliding groove (152) is arranged along the length direction of the base (1), and the first guide pillar (151) is connected in the first sliding groove (152) in a sliding mode;

the sliding plate (14) is provided with a second sliding chute (142) corresponding to the position of the second guide pillar (141), the second sliding chute (142) is arranged along the width direction of the base (1), and the second guide pillar (141) is connected in the second sliding chute (142) in a sliding manner.

6. A clean bench adapted for various tests according to claim 1, wherein: the first chain plate (17) comprises a plurality of first chain links (171) which are hinged with each other, the first chain link (171) closest to the base (1) is hinged on the base (1), and all the first chain links (171) can rotate along a hinge shaft parallel to the length direction of the base (1);

the second chain plate (18) comprises a plurality of second chain links (181) which are hinged with each other, the second chain link (181) closest to the base (1) is hinged on the base (1), and all the second chain links (181) can rotate along a hinged shaft which is parallel to the width direction of the base (1).

7. A clean bench adapted for various tests according to claim 1, wherein: base (1) corresponds first bracing piece (173) position department fixedly connected with first linear electric motor (174), the output shaft of first linear electric motor (174) sets up along base (1) width direction, the output shaft fixed connection of first linear electric motor (174) is on first bracing piece (173), base (1) corresponds second bracing piece (183) position department fixedly connected with second linear electric motor (184), the output shaft of second linear electric motor (184) sets up along base (1) length direction, the output shaft fixed connection of second linear electric motor (184) is on second bracing piece (183).

8. A clean bench adapted for various tests according to claim 7, wherein: the base (1) is connected with a control system (3), and the control system (3) comprises a detection module (31), a calculation module (32) and a control module (33);

the detection module (31) detects the extension distance of the output shaft of the first linear motor (174) and the extension distance of the output shaft of the second linear motor (184) to obtain a working area length value and a working area width value;

the calculation module (32) calls the working area length value and the working area width value of the detection module (31), calculates the area of the working area according to the working area length value and the working area width value, the calculation module (32) stores the area and the required fan power ratio, and the calculation module (32) calculates the estimated power of the clean fan (137) according to the area, the required fan power ratio and the working area;

the control module (33) calls the estimated power calculated by the calculation module (32) and controls the actual power of the clean fan (137) according to the estimated power.

Technical Field

The invention relates to the technical field of air purification equipment, in particular to a clean workbench suitable for various tests.

Background

The clean bench is a box type air purification device which can provide local dust-free clean and local operation environment with the sterile working environment grade of 100 (ISO grade 5). And the polluted air in the working area can be artificially controlled and discharged through a special filtering channel, so that the harm to people and the environment is avoided. The air speed, air cleanliness, noise, vibration, illumination and other performance parameters in the working space can be kept to meet the use requirements of laboratories in the working state, and the air-conditioning system is widely applied to relevant industries such as biological laboratories, medical treatment and health, biopharmaceuticals and the like, and has good effects on improving process conditions, protecting the health of operators, and improving the product quality and the finished product ratio. The working principle of the clean bench is that air is sucked by a fan and filtered by a high-efficiency filter through a static pressure box. The filtered clean air is sent out in a vertical or horizontal airflow state, so that the operating area can continuously reach 100-grade cleanliness under the control of the clean air, and a sterile high-clean working environment is formed.

The above prior art solutions have the following drawbacks: because clean bench's clean space only has the inside part of workstation, too can occupy too much laboratory space for the workstation, when the laboratory staff need do different experiments, need change different clean benches, but some instruments of a lot of experiments are the same, change clean bench not only troublesome still can increase testing cost.

Disclosure of Invention

In order to adapt to different test requirements, the application provides a clean bench that adapts to multiple experiments.

The application provides a clean bench who adapts to multiple experiment adopts following technical scheme:

a clean bench suitable for multiple tests comprises a base, wherein the top of the base is fixedly connected with a side plate and a back plate which are vertically arranged, the side plate and the back plate are mutually vertical, the top of the side plate and the top of the back plate are fixedly connected with a top frame together, one side, away from the side plate, of the top frame is slidably connected with a sliding plate, the sliding plate slides along the length direction of the base, the sliding plate is vertically arranged and can be abutted against the base, one side, away from the back plate, of the top frame is slidably connected with a transverse rod, the transverse rod slides along the width direction of the base, one end, away from the side plate, of the transverse rod is slidably connected with a first guide pillar, the first guide pillar slides along the length direction of the transverse rod, one end, away from the transverse rod, of the first guide pillar is fixedly connected with a fixed;

the side, far away from the back plate, of the top of the base is fixedly connected with a first chain plate, the side, far away from the side plate, of the top of the base is fixedly connected with a second chain plate, one end, close to the second chain plate, of the first chain plate is fixedly connected to the second chain plate, a first supporting rod is slidably connected to the position, corresponding to the bottom of the first chain plate, of the base, the first supporting rod is arranged along the length direction of the base, the first supporting rod slides along the width direction of the base, the first supporting rod abuts against the bottom of the first chain plate, a second supporting rod is slidably connected to the position, corresponding to the bottom of the second chain plate, of the base, the second supporting rod is arranged along the length direction of the base, the second supporting rod slides along the width direction of the base, the second supporting rod abuts against the bottom of the second chain plate, the first supporting rod is fixedly connected;

the top frame corresponds the junction rotation of backplate and curb plate and is connected with first traction lever, the sliding plate is kept away from fixed block one end and is rotated and be connected with the second traction lever, the fixed block rotates and is connected with the third traction lever, the transverse bar is kept away from fixed block one end and is rotated and be connected with the fourth traction lever, first traction lever, the second traction lever, common fixedly connected with has elastic elasticity cloth on third traction lever and the fourth traction lever, elasticity cloth surrounds the top frame, the transverse bar, sliding plate and fixed block top, top frame one side fixedly connected with fixed casing is kept away from to elasticity cloth, fixed casing fixed connection is on the backplate, fixedly connected with clean fan on the fixed casing, the top frame, the sliding plate, transverse bar and fixed block are close to elasticity cloth one side.

By adopting the proposal, before a new experiment is carried out, a tester needs to plan instruments and required test space required by the experiment, then the first supporting rod and the second supporting rod are pulled according to the required experimental space, the first chain plate and the second chain plate are partially supported by the first supporting rod and the second supporting rod respectively, the sliding plate and the transverse rod are driven to move by the first synchronous rod and the second synchronous rod, therefore, the coverage range of the elastic cloth is adjusted, the size of a working area is finally changed, the clean bench can meet different test requirements, the first synchronizing rod and the second synchronizing rod can ensure that the elastic cloth can sufficiently cover the working area, the first traction rod, the second traction rod, the third traction rod and the fourth traction rod provide support for the elastic cloth, the size of the filtering component can be changed along with the change of the shape of the elastic cloth, and the air filtering quality is ensured.

Preferably, filtering component includes that fixed connection is in top frame, sliding plate, horizontal pole and fixed block are close to the elastic first filter screen that has of elasticity cloth one side, and first filter screen is kept away from the second filter screen that corresponds sliding plate, horizontal pole and fixed block position department fixedly connected with L shape directly over the frame one side, and mesh density is the same with the second filter screen under the first filter screen natural state, and first filter screen and second filter screen are located elastic cloth, and the equal fixedly connected with in second filter screen both ends extends the filter screen.

Through adopting above-mentioned scheme, first filter screen is when following the elasticity cloth grow, and the part that first filter screen is close to near sliding plate and transverse bar can be stretched for the mesh increases, and second filter screen and the filter screen that extends can play the effect of guaranteeing the filter effect because the mesh size is unchangeable this moment.

Preferably, the elastic cloth is corresponding to the equal fixedly connected with in second filter screen both ends position department and holds the cell body, extends and filter screen sliding connection in the holding tank is internal.

By adopting the scheme, the accommodating groove body is used for storing the extension filter screen, and the possibility of damage and pollution of the extension filter screen is reduced.

Preferably, one side of the top frame, which is far away from the side plate, is connected with a lateral pull rod in a sliding manner, the lateral pull rod is arranged along the length direction of the base, the lateral pull rod slides along the length direction of the base, and the sliding plate is fixedly connected to one end, which is far away from the top frame, of the lateral pull rod;

one side of the top frame, which is far away from the back plate, is slidably connected with a longitudinal pull rod, the longitudinal pull rod is arranged along the width direction of the base, the longitudinal pull rod slides along the width direction of the base, and the transverse rod is fixedly connected to one end, far away from the top frame, of the longitudinal pull rod.

By adopting the scheme, the transverse pull rod and the longitudinal pull rod are respectively used for providing stable guide for the sliding of the sliding plate and the transverse rod.

Preferably, a lateral sliding groove is formed in the position, corresponding to the lateral pull rod, of the top frame, the lateral sliding groove is formed in the length direction of the base, and the lateral pull rod is connected into the lateral sliding groove in a sliding mode;

a longitudinal sliding groove is formed in the position, corresponding to the longitudinal pull rod, of the top frame, the longitudinal sliding groove is formed in the width direction of the base, and the longitudinal pull rod is connected in the longitudinal sliding groove in a sliding mode;

a first sliding groove is formed in the position, corresponding to the first guide pillar, of the transverse rod, the first sliding groove is formed in the length direction of the base, and the first guide pillar is connected in the first sliding groove in a sliding mode;

the sliding plate is provided with a second sliding chute corresponding to the second guide pillar, the second sliding chute is arranged along the width direction of the base, and the second guide pillar is connected in the second sliding chute in a sliding manner.

Through adopting above-mentioned scheme, can provide the storage space for side direction pull rod, vertical pull rod, first guide pillar and second guide pillar.

Preferably, the first chain plate comprises a plurality of first chain links hinged with each other, the first chain link closest to the base is hinged on the base, and all the first chain links can rotate along a hinge shaft parallel to the length direction of the base;

the second chain plate comprises a plurality of second chain links which are hinged with each other, the second chain links which are closest to the base are hinged on the base, and all the first chain links can rotate along hinge shafts which are parallel to the width direction of the base.

By adopting the scheme, the first chain plate can be lifted by the first supporting rod smoothly, and the second chain plate can be lifted by the second supporting rod smoothly.

Preferably, the base is fixedly connected with a first linear motor corresponding to the first support rod, an output shaft of the first linear motor is arranged along the width direction of the base, the output shaft of the first linear motor is fixedly connected to the first support rod, the base is fixedly connected with a second linear motor corresponding to the second support rod, an output shaft of the second linear motor is arranged along the length direction of the base, and an output shaft of the second linear motor is fixedly connected to the second support rod.

Through adopting above-mentioned scheme, first linear electric motor can promote first bracing piece and remove, and second linear electric motor can promote the removal of second bracing piece, and the staff of being convenient for adjusts work area's size.

Preferably, the base is connected with a control system, and the control system comprises a detection module, a calculation module and a control module;

the detection module detects the extension distance of the output shaft of the first linear motor and the extension distance of the output shaft of the second linear motor to obtain a working area length value and a working area width value;

the calculation module calls the working area length value and the working area width value of the detection module, calculates the area of the working area according to the working area length value and the working area width value, stores the ratio of the area to the required fan power, and calculates the estimated power of the clean fan according to the ratio of the area to the required fan power and the area of the working area;

the control module calls the estimated power calculated by the calculation module and controls the actual power of the clean fan according to the estimated power.

By adopting the scheme, the control system can control the power of the clean fan according to the working data of the first linear motor and the second linear motor, so that the energy used can be reduced as far as possible while the air cleanness degree of the working area of the clean workbench is ensured.

In conclusion, the invention has the following beneficial effects:

1. before a tester carries out a new test, instruments required by the test and a required test space need to be planned, then the first supporting rod and the second supporting rod are pulled according to the required test space, the first chain plate and the second chain plate are respectively supported by the first supporting rod and the second supporting rod, and the sliding plate and the transverse rod are driven to move by the first synchronizing rod and the second synchronizing rod, so that the coverage range of the elastic cloth is adjusted, the size of a working area is finally changed, and the clean workbench can adapt to different test requirements;

2. the first synchronizing rod and the second synchronizing rod can ensure that the elastic cloth can sufficiently cover a working area, the first traction rod, the second traction rod, the third traction rod and the fourth traction rod provide support for the elastic cloth, and the size of the filtering component can be changed along with the change of the shape of the elastic cloth, so that the air filtering quality is ensured.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;

FIG. 2 is a schematic view of a back panel and a side panel of an embodiment of the present application;

FIG. 3 is a cross-sectional view of the top frame, slide plate and transverse bar of an embodiment of the present application;

FIG. 4 is an exploded view of a filter assembly according to an embodiment of the present application;

FIG. 5 is a cross-sectional view of an extended filter screen and receiving slot of an embodiment of the present application;

FIG. 6 is a schematic view of a first synchronization bar, a second synchronization bar, a first linear motor, and a second linear motor of an embodiment of the present application;

fig. 7 is a block diagram of a control system according to an embodiment of the present application.

In the figure, 1, a base; 11. a side plate; 12. a back plate; 13. a top frame; 131. a first traction rod; 132. a second traction rod; 133. a third draw bar; 134. a fourth traction bar; 135. elastic cloth; 1351. an accommodating tank body; 136. a stationary housing; 137. cleaning a fan; 138. a lateral chute; 1381. a lateral pull rod; 139. a longitudinal chute; 1391. a longitudinal tie rod; 14. a sliding plate; 141. a second guide post; 142. a second chute; 15. a transverse bar; 151. a first guide post; 152. a first chute; 16. a fixed block; 17. a first link plate; 171. a first link; 173. a first support bar; 174. a first linear motor; 175. a first synchronization lever; 18. a second link plate; 181. a second link; 183. a second support bar; 184. a second linear motor; 185. a second synchronizing bar; 2. a filter assembly; 21. a first filter screen; 22. a second filter screen; 23. extending the filter screen; 3. a control system; 31. a detection module; 32. a calculation module; 33. and a control module.

Detailed Description

The present application is described in further detail below with reference to figures 1-7.

The embodiment of the application discloses clean bench that adapts to multiple experiment, as shown in fig. 1 and fig. 2, including base 1, the vertical curb plate 11 and the backplate 12 that set up of base 1 top fixedly connected with, curb plate 11 and backplate 12 mutually perpendicular. The length of the side plate 11 is equal to the width of the base 1, and the length of the back plate 12 is equal to the width of the base 1. A sliding plate 14 is connected to the base 1 in a sliding manner, the sliding plate 14 slides along the length direction of the base 1, the sliding plate 14 is vertically arranged, and the sliding plate 14 can abut against the base 1. The worker performs work on the base 1, and the side plates 11, the back plate 12, and the sliding plate 14 serve to block clean air.

As shown in fig. 2 and 3, the top of the side plate 11 and the top of the back plate 12 are fixedly connected with a top frame 13, the top frame 13 is located right above the base 1, one side of the top frame 13, which is far away from the back plate 12, is slidably connected with a transverse rod 15, and the transverse rod 15 slides along the width direction of the base 1. One side of the top frame 13, which is far away from the side plate 11, is slidably connected with a lateral pull rod 1381, the lateral pull rod 1381 is arranged along the length direction of the base 1, the lateral pull rod 1381 slides along the length direction of the base 1, and the sliding plate 14 is fixedly connected with one end, far away from the top frame 13, of the lateral pull rod 1381. The top frame 13 is provided with a lateral sliding groove 138 at a position corresponding to the lateral pull rod 1381, the lateral sliding groove 138 is arranged along the length direction of the base 1, and the lateral pull rod 1381 is slidably connected in the lateral sliding groove 138. One side of the top frame 13, which is far away from the back plate 12, is slidably connected with a longitudinal pull rod 1391, the longitudinal pull rod 1391 is arranged along the width direction of the base 1, the longitudinal pull rod 1391 slides along the width direction of the base 1, and the transverse rod 15 is fixedly connected to one end, far away from the top frame 13, of the longitudinal pull rod 1391. The top frame 13 is provided with a longitudinal sliding chute 139 corresponding to the position of the longitudinal pull rod 1391, the longitudinal sliding chute 139 is arranged along the width direction of the base 1, and the longitudinal pull rod 1391 is connected in the longitudinal sliding chute 139 in a sliding manner. The transverse and longitudinal tie-rods 1391 are used to provide stable guidance for the sliding movement of the sliding plate 14 and the transverse bars 15, respectively.

As shown in fig. 2 and fig. 3, one end of the transverse rod 15 away from the side plate 11 is slidably connected with a first guide pillar 151, the first guide pillar 151 slides along the length direction of the transverse rod 15, a first sliding groove 152 is formed at a position of the transverse rod 15 corresponding to the first guide pillar 151, the first sliding groove 152 is arranged along the length direction of the base 1, and the first guide pillar 151 is slidably connected in the first sliding groove 152. One end of the first guide pillar 151, which is far away from the transverse rod 15, is fixedly connected with a fixing block 16. One end of the top of the sliding plate 14, which is far away from the back plate 12, is slidably connected with a second guide post 141, the second guide post 141 is disposed along the length direction of the sliding plate 14, a second sliding slot 142 is disposed at a position of the sliding plate 14 corresponding to the second guide post 141, the second sliding slot 142 is disposed along the width direction of the base 1, and the second guide post 141 is slidably connected in the second sliding slot 142. The end of the second guide post 141 away from the sliding plate 14 is fixedly connected to the fixed block 16.

As shown in fig. 1 and 2, a first traction rod 131 is rotatably connected to a joint of the top frame 13 corresponding to the back plate 12 and the side plate 11, a second traction rod 132 is rotatably connected to one end of the sliding plate 14 away from the fixed block 16, a third traction rod 133 is rotatably connected to the fixed block 16, and a fourth traction rod 134 is rotatably connected to one end of the transverse rod 15 away from the fixed block 16. The first traction rod 131, the second traction rod 132, the third traction rod 133 and the fourth traction rod 134 are all made of elastic materials, elastic cloth 135 with elasticity is fixedly connected to the first traction rod 131, the second traction rod 132, the third traction rod 133 and the fourth traction rod 134 together, and the elastic cloth 135 surrounds the tops of the top frame 13, the transverse rod 15, the sliding plate 14 and the fixed block 16. One side of the elastic cloth 135 away from the top frame 13 is fixedly connected with a fixed shell 136, the fixed shell 136 is fixedly connected to the back plate 12, and the fixed shell 136 is fixedly connected with a clean fan 137. The cleaning fan 137 blows air into the elastic cloth 135, and the sliding plate 14 and the transverse rod 15 move to drive the elastic cloth 135 to deform, so that the elastic cloth 135 can surround the top of the top frame 13, the transverse rod 15, the sliding plate 14 and the fixed block 16 all the time.

As shown in fig. 4 and 5, the top frame 13, the sliding plate 14, the transverse rod 15 and the fixing block 16 are connected to the filtering assembly 2 together at a side close to the elastic cloth 135, and the filtering assembly 2 includes a first filtering net 21 having elasticity and fixedly connected to the top frame 13, the sliding plate 14, the transverse rod 15 and the fixing block 16 at a side close to the elastic cloth 135. An L-shaped second filter screen 22 is fixedly connected to the side, far away from the top frame 13, of the first filter screen 21, and corresponds to the position right above the sliding plate 14, the transverse rod 15 and the fixed block 16. The mesh density of the first filter screen is the same as that of the second filter screen 22 in a natural state, the first filter screen 21 and the second filter screen 22 are located in the elastic cloth 135, and the two ends of the second filter screen 22 are fixedly connected with the extension filter screens 23. The two ends of the elastic cloth 135 corresponding to the second filter screen 22 are fixedly connected with the accommodating groove body 1351, and the extending filter screen 23 is slidably connected in the accommodating groove body 1351. The filter assembly 2 can filter the wind blown from the cleaning fan 137. When the first filter is enlarged with the elastic cloth 135, the portion of the first filter near the sliding plate 14 and the transverse bar 15 is stretched, so that the mesh size is increased, and at this time, the second filter 22 and the extending filter 23 can play a role of ensuring the filtering effect because the mesh size is not changed. The receiving channel 1351 is used to store the extended filter mesh 23, reducing the possibility of damage and contamination to the extended filter mesh 23.

As shown in fig. 3 and 6, a first chain plate 17 is fixedly connected to the side of the top of the base plate 1 away from the back plate 12, a second chain plate 18 is fixedly connected to the side of the top of the base plate 1 away from the side plate 11, and one end of the first chain plate 17 close to the second chain plate 18 is fixedly connected to the second chain plate 18. The first link plate 17 includes a plurality of first links 171 hinged to each other, and the first links 171 closest to the base plate 1 are hinged to the base plate 1, and all the first links 171 are rotatable along hinge axes parallel to the length direction of the base plate 1. The second link plate 18 includes a plurality of second links 181 hinged to each other, and the second link 181 closest to the base 1 is hinged to the base 1, and all the second links 181 are rotatable along hinge axes parallel to the width direction of the base 1. The base 1 is slidably connected with a first supporting rod 173 corresponding to the bottom of the first chain plate 17, the first supporting rod 173 is disposed along the length direction of the base 1, the first supporting rod 173 slides along the width direction of the base 1, and the first supporting rod 173 abuts against the bottom of the first chain plate 17. The base 1 is fixedly connected with a first linear motor 174 corresponding to the first support rod 173, an output shaft of the first linear motor 174 is arranged along the width direction of the base 1, and an output shaft of the first linear motor 174 is fixedly connected to the first support rod 173. The base 1 is connected with a second support rod 183 corresponding to the bottom of the second chain plate 18 in a sliding manner, the second support rod 183 is arranged along the length direction of the base 1, the second support rod 183 slides along the width direction of the base 1, and the second support rod 183 abuts against the bottom of the second chain plate 18. The base 1 is fixedly connected with a second linear motor 184 corresponding to the position of the second support rod 183, the output shaft of the second linear motor 184 is arranged along the length direction of the base 1, and the output shaft of the second linear motor 184 is fixedly connected to the second support rod 183. The first linear motor 174 can push the first support rod 173 to move, the second linear motor 184 can push the second support rod 183 to move, and the first support rod 173 and the second support rod 183 can partially support the first chain plate 17 and the second chain plate 18, so that the worker can adjust the size of the working area.

As shown in fig. 3 and 6, the first supporting rod 173 is fixedly connected with the first synchronizing bar 175, the other end of the first synchronizing bar 175 is fixedly connected to the transverse bar 15, the second supporting rod 183 is fixedly connected with the second synchronizing bar 185, and the other end of the second synchronizing bar 185 is fixedly connected to the sliding plate 14. Pulling the first and second support bars 173 and 183 can move the sliding plate 14 and the transverse bar 15 by the first and second synchronizing bars 175 and 185.

As shown in fig. 6 and 7, the control system 3 is connected to the base 1, and the control system 3 includes a detection module 31, a calculation module 32, and a control module 33. The detection module 31 detects the output shaft extension distance of the first linear motor 174 and the output shaft extension distance of the second linear motor 184 to obtain a working area length value and a working area width value. The calculation module 32 calls the working area length value and the working area width value of the detection module 31, calculates the working area according to the working area length value and the working area width value, the calculation module 32 stores the area and the required fan power ratio, and the calculation module 32 calculates the estimated power of the clean fan 137 according to the area, the required fan power ratio and the working area. The control module 33 calls the estimated power calculated by the calculation module 32 and controls the actual power of the clean fan 137 according to the estimated power. The control system 3 can control the power of the cleaning fan 137 according to the operation data of the first and second linear motors 174 and 184, thereby reducing energy used as much as possible while ensuring an air cleaning degree of a working area of the clean bench.

The clean bench that this application embodiment adapted to multiple experiment implements the principle and does: before a tester carries out a new test, the tester needs to plan instruments and a required test space required by the test, then pulls the first support rod 173 and the second support rod 183 according to the required test space, the first support rod 173 and the second support rod 183 respectively support the first chain plate 17 and the second chain plate 18, and drives the sliding plate 14 and the transverse rod 15 to move through the first synchronizing rod 175 and the second synchronizing rod 185, so as to adjust the coverage range of the elastic cloth 135 and finally change the size of the working area, so that the clean bench can adapt to different test requirements, the first synchronizing rod 175 and the second synchronizing rod 185 can ensure that the elastic cloth 135 sufficiently covers the working area, the first traction rod 131, the second traction rod 132, the third traction rod 133 and the fourth traction rod 134 provide support for the elastic cloth 135, and the filter assembly 2 can change the size along with the change of the shape of the elastic cloth 135, the air filtering quality is ensured.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.