Negative pressure discharge device and article conveying system
The air in the high-pressure and low-pressure areas is sucked in and discharged to the outside through the negative pressure discharge device, solving the problem of air pollution caused by the normal opening of the wall holes and achieving effective air isolation in the clean area.
Patent Information
- Application Number
- CN202422162763.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-03
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-09-03
AI Technical Summary
In the prior art, the normally open state of the wall hole between the clean area and the non-clean area causes the air in the high-pressure area to enter the low-pressure area, contaminating the low-pressure area.
A negative pressure discharge device is designed to suck air in the high- and low-pressure areas into the device through the rail passage and exhaust duct, and a pressure lower than that in the exhaust duct is generated in the exhaust duct, thereby discharging the air to the outside and avoiding cross-contamination of air.
Even if the through-wall holes are always open, the air in the high-pressure area cannot enter the low-pressure area, avoiding pollution in the low-pressure area and achieving air isolation in the clean area.
Smart Images
Figure CN223086888U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of clean areas, and particularly to a negative pressure discharge device and an article conveying system. Background Art
[0002] Strict requirements are imposed on the indoor environmental parameters in a clean area, such as air cleanliness, temperature, humidity, etc. For example, it should be avoided that the air in the non-clean area enters the clean area. Therefore, the pressure in the clean area is greater than that in the non-clean area, and the pressure in the high-level clean area is greater than that in the low-level clean area.
[0003] In the related art, a through-wall hole is provided between the clean area and the non-clean area and / or between two clean areas of different grades to facilitate the conveyance of articles from one area to another. In addition, in the related art, there is a situation where the through-wall hole is in an open state all the time for continuous article conveyance. For example, after filling and capping, the vials are continuously conveyed from the capping room (clean area of grade B) to the product receiving room (usually a controlled non-classified area, abbreviated as CNC) through the track installed in the through-wall hole. In this case, since the through-wall hole is in an open state all the time, the air in the capping room inevitably enters the product receiving room under the action of the pressure difference, resulting in the contamination of the product receiving room.
[0004] Therefore, in the related art, when the through-wall hole is in an open state all the time, there is a problem that the air in the high-pressure area enters the low-pressure area, resulting in the contamination of the low-pressure area. Summary of the Utility Model
[0005] The purpose of this application is to provide a negative pressure discharge device and an article conveying system, which suck the air in the high-pressure area and the air in the low-pressure area into the interior of the negative pressure discharge device and discharge them outside the low-pressure area and the high-pressure area to prevent the air in the high-pressure area from entering the low-pressure area.
[0006] In a first aspect, the negative pressure discharge device of this application includes:
[0007] A track channel configured to accommodate an article conveying track, the track channel having a first opening and a second opening, the first opening being configured to communicate with the high-pressure area, and the second opening being configured to communicate with the low-pressure area;
[0008] An exhaust duct, the air inlet of the exhaust duct communicating with the track channel, and the air outlet of the exhaust duct being configured to be installed outside the high-pressure area and outside the low-pressure area; and
[0009] An exhaust fan installed in the exhaust duct, the exhaust fan being configured to generate a pressure lower than the pressure in the low-pressure area in the exhaust duct.
[0010] In a second aspect, the first article conveying system of the present application includes:
[0011] A first wall, one side of the first wall is a high-pressure area, the other side of the first wall is a low-pressure area, and the first wall includes a first through-wall hole that communicates the high-pressure area and the low-pressure area;
[0012] An article conveying track, at least part of the article conveying track is located in the low-pressure area and corresponds to the first through-wall hole; and
[0013] The negative pressure discharge device, the negative pressure discharge device is located in the low-pressure area, the article conveying track passes through the track channel, the first opening communicates with the high-pressure area through the first through-wall hole, and the second opening directly communicates with the low-pressure area.
[0014] In a third aspect, the second article conveying system of the present application includes:
[0015] A first wall, one side of the first wall is a high-pressure area, the other side of the first wall is a low-pressure area, and the first wall includes a first through-wall hole that communicates the high-pressure area and the low-pressure area;
[0016] An article conveying track, at least part of the article conveying track is located in the high-pressure area and corresponds to the first through-wall hole; and
[0017] The negative pressure discharge device, the negative pressure discharge device is located in the high-pressure area, the article conveying track passes through the track channel, the first opening directly communicates with the high-pressure area, and the second opening communicates with the low-pressure area through the first through-wall hole.
[0018] In a fourth aspect, the third article conveying system of the present application includes:
[0019] A high-pressure area;
[0020] A low-pressure area;
[0021] An intermediate area located between the high-pressure area and the low-pressure area, a second through-wall hole is provided between the intermediate area and the high-pressure area, and a third through-wall hole is provided between the intermediate area and the low-pressure area;
[0022] An article conveying track, at least part of the article conveying track is located between the second through-wall hole and the third through-wall hole; and
[0023] The described negative pressure discharge device is located in the middle area. The article conveying track passes through the track channel. The first opening communicates with the high-pressure area through the second wall-piercing hole, and the second opening communicates with the low-pressure area through the third wall-piercing hole.
[0024] Compared with the prior art, the beneficial effects of the present application include:
[0025] When the exhaust fan is started, the exhaust fan generates a pressure lower than that in the low-pressure area in the exhaust duct. Therefore, the pressures in both the high-pressure area and the low-pressure area are greater than the pressure in the exhaust duct. Under the action of the pressure difference, the air in the high-pressure area enters the track channel from the first opening, then enters the exhaust duct, and finally is discharged from the air outlet; similarly, the air in the low-pressure area enters the track channel from the second opening, then enters the exhaust duct, and finally is discharged from the air outlet. Thus, even if the wall-piercing hole is in an open state all the time, the air in the high-pressure area cannot enter the low-pressure area through the wall-piercing hole, avoiding the pollution of the air in the low-pressure area. Description of the Drawings
[0026] Figure 1 Shows a schematic diagram of the first article conveying system of the present application.
[0027] Figure 2 Shows a schematic diagram of the second article conveying system of the present application.
[0028] Figure 3 Shows a schematic diagram of the third article conveying system of the present application.
[0029] Figure 4 Shows a schematic diagram of the negative pressure discharge device of the present application.
[0030] Figure 5 Shows a schematic diagram of the gas flow direction of the negative pressure discharge device of the present application.
[0031] Reference Signs:
[0032] 100, the first wall; 110, the first wall-piercing hole;
[0033] 200, article conveying track;
[0034] 300, negative pressure discharge device; 310, first opening; 320, second opening; 330, housing; 331, left side wall; 332, right side wall; 340, exhaust duct; 341, air inlet; 342, air outlet; 350, exhaust fan; 360, air volume regulating valve; 370, laminar flow hood; 371, inlet; 372, outlet; 380, transition chamber;
[0035] 400, high-pressure area;
[0036] 500, low-pressure area;
[0037] 600, second wall; 610, second through-wall hole;
[0038] 700, third wall; 710, third through-wall hole;
[0039] 800, middle area. Detailed implementation manners
[0040] The technical solution of the present application will be further described below with reference to the accompanying drawings and through specific implementation manners. It can be understood that the specific embodiments described herein are only used to explain the present application, rather than limiting the present application. In addition, it should be noted that for the convenience of description, only the parts related to the present application are shown in the drawings, rather than all of them.
[0041] Some orientation words are defined in the present application. Without contrary explanations, the orientation words such as "upper", "lower", "left", "right", "inner", and "outer" are used for the convenience of understanding, and thus do not constitute a limitation on the protection scope of the present application.
[0042] In the present application, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.
[0043] In the description of the present application, unless otherwise clearly defined and limited, the terms "connected", "connected to" and "fixed" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication between two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.
[0044] Embodiment 1: The First Article Conveying System
[0045] Figure 1 The schematic diagram of the first article conveying system of the present application is shown. As Figure 1As shown in the figure, the first article conveying system includes a first wall 100, an article conveying track 200, and a negative pressure discharge device 300.
[0046] The left side of the first wall 100 is a high-pressure area 400, and the right side of the first wall 100 is a low-pressure area 500. The pressure in the high-pressure area 400 is greater than the pressure in the low-pressure area 500. For example, the pressure difference between the high-pressure area 400 and the low-pressure area 500 is greater than 45 Pa.
[0047] As an example, the high-pressure area 400 can be a clean area, and the low-pressure area 500 can be a non-clean area. In addition, the high-pressure area 400 can be a clean area of a higher grade, and the low-pressure area 500 can be a clean area of a lower grade.
[0048] The first wall 100 includes a first through-wall hole 110 that connects the high-pressure area 400 and the low-pressure area 500.
[0049] The article conveying track 200 is at least partially located in the low-pressure area 500. Specifically, in Figure 1 the left end of the article conveying track 200 is located in the high-pressure area 400, and the right end of the article conveying track 200 is located in the low-pressure area 500. In Figure 1 the conveying direction of the article conveying track 200 is from left to right, that is, the article is conveyed from the high-pressure area 400 to the low-pressure area 500. As an example, the article can be a vial, especially a vial after filling and capping.
[0050] In addition, the article conveying track 200 corresponds to the first through-wall hole 110. Specifically, in Figure 1 the middle part of the article conveying track 200 passes through the first through-wall hole 110. However, in an embodiment not shown, it can also be that only the input end of the article conveying track 200 is located in the first through-wall hole 110.
[0051] As Figure 1 shown, the negative pressure discharge device 300 is located in the low-pressure area 500, and the article conveying track 200 passes through the negative pressure discharge device 300. Specifically, the negative pressure discharge device 300 includes a first opening 310 on the left side and a second opening 320 on the right side. The article conveying track 200 can enter the interior of the negative pressure discharge device 300 through the first opening 310 and extend out from the second opening 320. The first opening 310 is connected to the high-pressure area 400 through the first through-wall hole 110. The second opening 320 is directly connected to the low-pressure area 500.
[0052] The specific structure of the negative pressure discharge device 300 is described in detail below. It should be noted that the negative pressure discharge device 300 can generate a pressure lower than the pressure in the low-pressure area 500. Therefore, the pressure inside the negative pressure discharge device 300 is lower than both the pressure in the low-pressure area 500 and the pressure in the high-pressure area 400. In this way, the air in the high-pressure area 400 and the air in the low-pressure area 500 are both sucked into the interior of the negative pressure discharge device 300 and finally discharged to the outside of the high-pressure area 400 and the low-pressure area 500 (such as the sandwich of color steel plates or outdoors), preventing the air in the high-pressure area 400 from entering the low-pressure area 500 through the first through-wall hole 110.
[0053] Embodiment 2: The Second Article Conveying System
[0054] Figure 2 The schematic diagram of the second article conveying system of the present application is shown. As Figure 2 shown, similar to Embodiment 1, the second article conveying device also includes a first wall 100, an article conveying track 200, and a negative pressure discharge device 300. The difference between Embodiment 2 and Embodiment 1 is that the negative pressure discharge device 300 is located in the high-pressure area 400, the first opening 310 is directly connected to the high-pressure area 400, and the second opening 320 is connected to the low-pressure area 500 through the first through-wall hole 110.
[0055] Similar to Embodiment 1, the article conveying system of Embodiment 2 can also prevent the air in the high-pressure area 400 from entering the low-pressure area 500 through the first through-wall hole 110.
[0056] Embodiment 3: The Third Article Conveying System
[0057] Figure 3 The schematic diagram of the third article conveying system of the present application is shown. As Figure 3 shown, the third article conveying system includes a second wall 600, a third wall 700, an article conveying track 200, and a negative pressure discharge device 300.
[0058] The left side of the second wall 600 is the high-pressure area 400, the right side of the third wall 700 is the low-pressure area 500, and the area between the second wall 600 and the third wall 700 is the intermediate area 800. That is, an intermediate area 800 is provided between the high-pressure area 400 and the low-pressure area 500. The intermediate area 800 can play a role in buffering pressure and prevent the high-pressure area 400 and the low-pressure area 500 from being directly connected.
[0059] The second wall 600 has a second through-wall hole 610 that connects the intermediate area 800 to the high-pressure area 400. The third wall 700 has a third through-wall hole 710 that connects the intermediate area 800 to the low-pressure area 500.
[0060] The article conveying track 200 is at least partially located between the second through-wall hole 610 and the third through-wall hole 710. Specifically, in Figure 3 , the left end of the article conveying track 200 is located in the high-pressure area 400, the right end of the article conveying track 200 is located in the low-pressure area 500, and the middle part of the article conveying track 200 passes through between the second through-wall hole 610 and the third through-wall hole 710. However, in an embodiment not shown, the left end of the article conveying track 200 may be located in the second through-wall hole 610. Similarly, the right end of the article conveying track 200 may be located in the third through-wall hole 710.
[0061] As Figure 3 shown, the negative pressure discharge device 300 is located in the middle area 800, and the article conveying track 200 passes through the negative pressure discharge device 300. Specifically, the negative pressure discharge device 300 includes a first opening 310 on the left side and a second opening 320 on the right side. The article conveying track 200 enters the interior of the negative pressure discharge device 300 from the first opening 310 and extends out from the second opening 320. The first opening 310 is communicated with the high-pressure area 400 through the second through-wall hole 610. The second opening 320 is communicated with the low-pressure area 500 through the third through-wall hole 710.
[0062] According to the article conveying system of Embodiment 3, the pressure inside the negative pressure discharge device 300 is lower than both the pressure in the low-pressure area 500 and the pressure in the high-pressure area 400. Therefore, the air in the high-pressure area 400 enters the negative pressure discharge device 300 through the second through-wall hole 610, and the air in the low-pressure area 500 enters the negative pressure discharge device 300 through the third through-wall hole 710, and finally is discharged to the outside of the high-pressure area 400 and the low-pressure area 500 (such as the sandwich layer of color steel plates or outdoors), avoiding the air in the high-pressure area 400 from entering the low-pressure area 500 through the second through-wall hole 610 and the third through-wall hole 710.
[0063] Negative Pressure Discharge Device 300
[0064] Figure 4 shows a schematic diagram of the negative pressure discharge device 300 of the present application. As Figure 4 shown, the negative pressure discharge device 300 includes a hollow outer shell 330. As an example, the outer shell 330 includes a left side wall 331 and a right side wall 332. The left side wall 331 has the first opening 310, and the right side wall 332 has the second opening 320. A track channel is formed between the first opening 310 and the second opening 320, that is, the article conveying track 200 can pass through the first opening 310 and the second opening 320. The first opening 310 is communicated with the high-pressure area 400. The second opening 320 is communicated with the low-pressure area 500.
[0065] It should be noted that, in some embodiments, the outer shell 330 may not include the left sidewall 331 and / or the right sidewall 332. For example, in Figure 1 in the first article conveying system shown, the left sidewall 331 may be omitted because the right side surface of the first wall body 100 can serve as the left sidewall 331. At this time, the first opening 310 can be a part of the first through-wall hole 110. For another example, in the second article conveying system, the right sidewall 332 can be omitted because the left side surface of the first wall body 100 can serve as the right sidewall 332. At this time, the second opening 320 can be a part of the first through-wall hole 110. For another example, in the third article conveying system, both the left sidewall 331 and the right sidewall 332 can be omitted because the right side surface of the second wall body 600 can serve as the left sidewall 331, and the left side surface of the third wall body 700 can serve as the right sidewall 332. The first opening 310 is a part of the second through-wall hole 610, and the second opening 320 is a part of the third through-wall hole 710.
[0066] As Figure 4 shown, the negative pressure discharge device 300 further includes an exhaust duct 340 and an exhaust fan 350. The exhaust duct 340 includes an air inlet 341 and an air outlet 342. The air inlet 341 is communicated with the inner cavity of the outer shell 330, and thus is communicated with the track channel. The air outlet 342 is located outside the high-pressure area 400 and outside the low-pressure area 500 (such as in the color steel plate sandwich or outdoors). The exhaust fan 350 is installed in the exhaust duct 340, and the exhaust fan 350 is configured to generate a pressure lower than the pressure in the low-pressure area 500 in the exhaust duct 340.
[0067] Thus, when the exhaust fan 350 rotates, the pressure in the exhaust duct 340 is lower than both the pressure in the low-pressure area 500 and the pressure in the high-pressure area 400. Therefore, the air in the high-pressure area 400 and the air in the low-pressure area 500 are both sucked into the exhaust duct 340 through the track channel and are finally discharged outdoors, for example, so as to prevent the air in the high-pressure area 400 from entering the low-pressure area 500.
[0068] As Figure 4 shown, the negative pressure discharge device 300 further includes an air volume regulating valve 360. The air volume regulating valve 360 is located in the exhaust duct 340 and is used to regulate the air volume of the air outlet 342. Specifically, when the negative pressure discharge device 300 operates normally, the air volume of the air outlet 342 is greater than or equal to the air volume entering the track channel, so that the pressure in the exhaust duct 340 is always lower than the pressure in the low-pressure area 500.
[0069] It should be noted that the structure of the air volume regulating valve 360 belongs to the prior art and will not be elaborated here. For example, the air volume regulating valve 360 can be Figure 4 the manual air volume regulating valve shown in, or it can also be an electronic air volume regulating valve not shown. The present application does not make any limitation.
[0070] In addition, the position of the air volume regulating valve 360 is not limited and can be set according to actual needs. For example, in Figure 4 , the air volume regulating valve 360 is located upstream of the exhaust fan 350, that is, relative to the flow direction of the air in the exhaust duct 340, the air volume regulating valve 360 is located upstream of the exhaust fan 350.
[0071] Such as Figure 4 shown, the negative pressure discharge device 300 further includes a laminar flow hood 370. The laminar flow hood 370 is located above the track channel. The inlet 371 of the laminar flow hood 370 is configured to communicate with the area where the negative pressure discharge device 300 is located. Specifically, when the negative pressure discharge device 300 is located in the low-pressure area 500, the inlet 371 communicates with the low-pressure area 500; when the negative pressure discharge device 300 is located in the high-pressure area 400, the inlet 371 communicates with the high-pressure area 400; when the negative pressure discharge device 300 is located in the intermediate area 800, the inlet 371 communicates with the intermediate area 800. The number of inlets 371 can be one or more. The outlet 372 of the laminar flow hood 370 faces downward and communicates with the track channel, that is, the air blown out from the outlet 372 directly blows on the upper surface of the track channel.
[0072] It should be noted that the structure of the laminar flow hood 370 belongs to the prior art and generally includes a fan, a primary filter, a high-efficiency filter, a uniform flow membrane, etc., which will not be elaborated here. By setting the laminar flow hood 370, at least a buffering effect can be achieved to avoid the air flow from flowing at too high a speed.
[0073] Such as Figures 1 - 3 shown, the negative pressure discharge device 300 further includes a transition chamber 380 located below the track channel. The transition chamber 380 connects the track channel and the exhaust duct 340. Therefore, the air entering from the first opening 310, the air entering from the second opening 320, and the air entering from the laminar flow hood 370 are mixed with each other in the transition chamber 380 and enter the exhaust duct 340 through the air inlet 341.
[0074] Such as Figure 4 shown, the laminar flow hood 370, the track channel, and the transition chamber 380 form an air inlet channel from top to bottom. The exhaust duct 340 is located on one side of the housing 330, and the exhaust duct 340 forms an exhaust channel from bottom to top. The air inlet channel and the exhaust channel are adjacent and parallel to each other.
[0075] Figure 5 shows a schematic diagram of the gas flow direction of the negative pressure discharge device 300 of the present application. Such as Figure 5As shown, the air in the area where the negative pressure discharge device 300 is located can enter the laminar flow hood 370 from the inlet 371 and flow downward. After passing through the track channel, it enters the transition chamber 380, then enters the exhaust duct 340, and finally is discharged into the sandwich of the color steel plate or outdoors. Similarly, the air in the high-pressure area 400 can enter the track channel from the first opening 310, then flow downward into the transition chamber 380, then enter the exhaust duct 340, and finally be discharged into the sandwich of the color steel plate or outdoors. Similarly, the air in the low-pressure area 500 can enter the track channel from the second opening 320, then flow downward into the transition chamber 380, then enter the exhaust duct 340, and finally be discharged into the sandwich of the color steel plate or outdoors.
[0076] The negative pressure discharge device 300 further includes a first adjusting plate (not shown). The first adjusting plate is movably installed at the first opening 310 to adjust the opening degree of the first opening 310. Specifically, the first adjusting plate can be installed on the housing 330 through a longitudinally extending slide rail (not shown), so that the first adjusting plate can be lifted and lowered, thereby adjusting the opening degree of the first opening 310.
[0077] Similarly, the negative pressure discharge device 300 further includes a second adjusting plate (not shown). The second adjusting plate is movably installed at the second opening 320 to adjust the opening degree of the second opening 320. Specifically, the second adjusting plate can be installed on the housing 330 through a longitudinally extending slide rail (not shown), so that the second adjusting plate can be lifted and lowered, thereby adjusting the opening degree of the second opening 320.
[0078] Usage method of the negative pressure discharge device 300:
[0079] 1. The air conditioners in the high-pressure area 400 and the low-pressure area 500 are normally started to make the pressure difference between the high-pressure area 400 and the low-pressure area 500 reach the set value;
[0080] 2. Adjust the fan of the laminar flow hood 370 to make the wind speed below the uniform flow film reach 35 - 55 cm / s;
[0081] 3. Adjust the air volume regulating valve 360 and the exhaust fan 350 to make the air flow patterns at the first opening 310 and the second opening 320 both flow towards the inside of the negative pressure discharge device 300, and all the air at the track channel flows downward into the exhaust duct 340 and is finally discharged into the sandwich of the color steel plate or outdoors.
[0082] Beneficial effects of the negative pressure discharge device 300:
[0083] The negative pressure discharge device 300 of the present application has an air trap function, enabling the air in the high-pressure area 400 and the air in the low-pressure area 500 to flow into the negative pressure discharge device 300 internally, and finally discharging the air into the sandwich of the color steel plate or outdoors, avoiding mutual contamination of the air in the high-pressure area 400 and the low-pressure area 500.
[0084] According to the negative pressure discharge device 300 of the present application, even if the wall-piercing hole is in an always-open state, the air in the high-pressure area 400 and the low-pressure area 500 can be prevented from contaminating each other, and in particular, the air in the high-pressure area 400 can be prevented from entering the low-pressure area 500.
[0085] The above is the description of the embodiments of the present application. Through the above description of the disclosed embodiments, those skilled in the art can implement or use the present application. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. Negative pressure discharge device, characterized in that, Comprising: An orbital passage configured to accommodate an article conveying track (200), the orbital passage having a first opening (310) and a second opening (320), the first opening (310) being configured to communicate with a high-pressure area (400), and the second opening (320) being configured to communicate with a low-pressure area (500); An exhaust duct (340), an air inlet (341) of the exhaust duct (340) communicating with the orbital passage, and an air outlet (342) of the exhaust duct (340) being configured to be installed outside the high-pressure area (400) and outside the low-pressure area (500); And An exhaust fan (350) installed in the exhaust duct (340), the exhaust fan (350) being configured to generate a pressure lower than the pressure in the low-pressure area (500) in the exhaust duct (340).
2. The negative pressure discharge device according to claim 1, wherein The negative pressure discharge device (300) further comprises: An air volume regulating valve (360) located in the exhaust duct (340), the air volume regulating valve (360) being configured to regulate the air volume at the air outlet (342).
3. The negative pressure discharge device according to claim 1, characterized in that, The negative pressure discharge device (300) further comprises: A laminar flow hood (370) located above the orbital passage, an inlet (371) of the laminar flow hood (370) being configured to communicate with the area where the negative pressure discharge device (300) is located, and an outlet (372) of the laminar flow hood (370) facing downward and communicating with the orbital passage.
4. The negative pressure discharge device according to claim 3, wherein The negative pressure discharge device (300) further comprises: A transition chamber (380) located below the orbital passage, the transition chamber (380) interconnecting the orbital passage and the exhaust duct (340).
5. The negative pressure discharge device according to claim 4, characterized in that, The laminar flow hood (370), the orbital passage, and the transition chamber (380) form an air inlet passage from top to bottom, and the exhaust duct (340) forms an air exhaust passage from bottom to top, and the air inlet passage and the air exhaust passage are adjacent and parallel to each other.
6. The negative pressure discharge device according to claim 1, wherein The negative pressure discharge device (300) further comprises: An article conveying track (200) located in the orbital passage, the article conveying track (200) being configured to convey articles in the high-pressure area (400) to the low-pressure area (500).
7. The negative pressure discharge device according to claim 1, characterized in that, The negative pressure discharge device (300) further comprises: A first regulating plate movably installed at the first opening (310) to adjust the opening degree of the first opening (310); and / or A second regulating plate movably installed at the second opening (320) to adjust the opening degree of the second opening (320).
8. An article conveying system, characterized in that, Comprising: A first wall (100), one side of the first wall (100) is a high-pressure area (400), the other side of the first wall (100) is a low-pressure area (500), and the first wall (100) includes a first through-wall hole (110) that communicates the high-pressure area (400) and the low-pressure area (500); An article conveying track (200), at least part of the article conveying track (200) is located in the low-pressure area (500) and corresponds to the first through-wall hole (110); And A negative pressure discharge device (300) according to any one of claims 1 to 7, the negative pressure discharge device (300) is located in the low-pressure area (500), the article conveying track (200) passes through the track channel, and the first opening (310) communicates with the high-pressure area (400) through the first through-wall hole (110), and the second opening (320) communicates directly with the low-pressure area (500).
9. An article conveying system, characterized in that, Comprising: A first wall (100), one side of the first wall (100) is a high-pressure area (400), the other side of the first wall (100) is a low-pressure area (500), and the first wall (100) includes a first through-wall hole (110) that communicates the high-pressure area (400) and the low-pressure area (500); An article conveying track (200), at least part of the article conveying track (200) is located in the high-pressure area (400) and corresponds to the first through-wall hole (110); And A negative pressure discharge device (300) according to any one of claims 1 to 7, the negative pressure discharge device (300) is located in the high-pressure area (400), the article conveying track (200) passes through the track channel, and the first opening (310) communicates directly with the high-pressure area (400), and the second opening (320) communicates with the low-pressure area (500) through the first through-wall hole (110).
10. An article conveying system, characterized in that, Comprising: A high-pressure area (400); A low-pressure area (500); An intermediate area (800) located between the high-pressure area (400) and the low-pressure area (500), a second through-wall hole (610) is provided between the intermediate area (800) and the high-pressure area (400), and a third through-wall hole (710) is provided between the intermediate area (800) and the low-pressure area (500); An article conveying track (200), at least part of the article conveying track (200) is located between the second through-wall hole (610) and the third through-wall hole (710); and The negative pressure discharge device (300) according to any one of claims 1 to 7, wherein the negative pressure discharge device (300) is located in the intermediate region (800), the article conveying track (200) passes through the track channel, the first opening (310) communicates with the high-pressure region (400) through the second wall-piercing hole (610), and the second opening (320) communicates with the low-pressure region (500) through the third wall-piercing hole (710).