Small desktop waste gas filtering and discharging machine

Abstract

The utility model provides a desktop small waste gas filtering and discharging machine, and belongs to the technical field of environmental protection devices. The desktop small waste gas filtering and discharging machine comprises an outer shell, an inner shell, a sailboard, a fan, a curtain plate, a liquid storage tank, a liquid storage tank and a pump. The inner shell is arranged above the inner side of the outer shell and is provided with a flow guide inclined plane and a confluence groove; and the sailboard is obliquely arranged in the inner shell. And the fan is arranged at the top of the outer shell. The curtain plate is obliquely arranged in the direction parallel to the flow guide inclined face. And the liquid storage tank is arranged at the inclined upper end of the curtain plate. A part of the liquid storage box is located in the outer shell. The pump circularly pumps the liquid medium in the liquid storage box into the liquid storage box, and then the liquid medium flows out of the overflow port and forms a continuous liquid curtain on the upper surface of the curtain plate. The liquid storage box inserting and taking mode is changed, an auxiliary transmission structure for synchronously driving the negative pressure cabin plate, the water curtain plate and the submersible pump to lift in the prior art is omitted, and the overall structure is simpler.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental protection devices, in particular to a desktop small-sized waste gas filtering and discharging machine. Background Art

[0002] In the process of model making, spray painting is an indispensable step. However, the waste gas and paint mist generated by spray painting will pollute the working environment and cause health hazards to the human body. For this reason, relevant personnel have developed a water curtain discharge device to remove waste gas and paint mist through extraction and adsorption.

[0003] For example, the applicant has previously designed, developed and authorized a utility model (name: "Desktop Small Exhaust Filter and Discharge Machine", announcement number: CN216856092U, announcement date: 20220701). However, when the water in the sink is replaced later, the tray needs to be pulled out and the negative pressure cabin, water curtain plate and submersible pump need to be lifted synchronously. As a result, the desktop small exhaust filter and discharge machine needs to involve a relatively complex transmission structure, which makes the overall structure more complex. Utility Model Content

[0004] The utility model aims to provide a desktop small-sized exhaust gas filtering and discharging machine, which changes the insertion and removal mode of the liquid storage box, eliminates the auxiliary transmission structure for synchronously driving the lifting of the negative pressure cabin plate, the water curtain plate and the submersible pump in the prior art, and makes the overall structure simpler.

[0005] The technical solution adopted by the utility model is:

[0006] A desktop small exhaust gas filtering and discharging machine, comprising:

[0007] An outer shell, wherein a first working window and a second working window are formed on a front side wall of the outer shell; the first working window is located above the second working window;

[0008] An inner shell with an open front side wall, the inner shell is arranged above the inner side of the outer shell, and the open edge of the inner shell is connected to the edge of the first working window; the lower part of the rear side wall of the inner shell is a guide slope, and the inclination direction of the guide slope is from the rear side wall to the lower part of the open front side; the bottom surface of the inner shell is provided with a confluence groove; the bottom of the confluence groove is provided with a drainage port;

[0009] A sailboard, wherein the sailboard is arranged in the inner shell body from the open front side of the inner shell body to the lower side of the rear side wall at an angle; the inclined upper end and left and right edges of the sailboard are respectively in contact and sealed with the top wall and left and right side walls of the inner shell body, and a negative pressure working area is formed behind the sailboard; a gap is formed between the inclined lower end of the sailboard and the rear side wall of the inner shell body;

[0010] A fan, the fan being arranged on the top of the outer shell, and having an air inlet connected to the negative pressure working area;

[0011] A curtain plate, wherein the curtain plate is tilted and arranged in the inner shell along a direction parallel to the guide slope, and the left and right edges thereof are in contact and sealed with the left and right side walls of the inner shell; an auxiliary air flow channel is formed between the curtain plate and the guide slope; the inclined upper end of the curtain plate is located between the inclined lower end of the sail plate and the rear side wall of the inner shell, and the gap between the curtain plate and the inclined lower end of the sail plate forms an upper air suction port; the gap between the inclined lower end of the curtain plate and the inclined lower end of the guide slope forms a lower air suction port of the auxiliary air flow channel;

[0012] A liquid storage tank, the liquid storage tank is arranged at the inclined upper end of the curtain plate, and does not block the communication between the auxiliary air flow channel and the negative pressure working area; a rectangular overflow port is provided near the connection between the liquid storage tank and the curtain plate; the liquid medium in the liquid storage tank flows out from the overflow port to form a liquid curtain on the upper surface of the curtain plate, and finally converges in the confluence groove;

[0013] A liquid storage box of a closed structure, wherein a portion of the liquid storage box is inserted into the area between the bottom surface of the inner shell and the bottom surface of the outer shell through the second working window; a liquid inlet is provided on the upper surface of the liquid storage box located inside the second working window; the liquid inlet cooperates with the liquid discharge port to transfer the liquid medium in the confluence trough into the liquid storage box; a fourth working window hole is provided on the upper surface of the liquid storage box located outside the second working window;

[0014] A pump is placed in the liquid storage tank through the fourth working window hole, and its output end is connected with the liquid storage tank through a connecting pipe; the pump circulates and draws the liquid medium in the liquid storage tank to the upper surface of the curtain plate to form a continuous liquid curtain.

[0015] Furthermore, the length of the overflow port is consistent with the length of the inclined upper end of the curtain plate, and the upper edge thereof is serrated.

[0016] Furthermore, baffles are provided on the left and right sides of the curtain plate;

[0017] And / or, a porous plate is provided at the inclined lower end of the curtain plate along its length direction; the porous plate is arranged at an obtuse angle with the curtain plate and is vertically oriented toward the bottom surface of the inner shell.

[0018] Furthermore, an edge of one end of the porous plate away from the curtain plate is serrated.

[0019] Furthermore, a plurality of air inlet holes are provided near the inclined lower end of the sailboard;

[0020] And / or, the inclined lower end of the sailboard is serrated.

[0021] Furthermore, the upper surface of the liquid storage box portion located inside the second working window has a cache groove, and the liquid inlet is located at the bottom of the cache groove.

[0022] Furthermore, the lower edge of the liquid discharge port extends toward the bottom surface of the outer shell to form a guide tube; the lower end of the guide tube extends to above the bottom of the cache groove.

[0023] Further, the left and right side surfaces and the bottom surface of the liquid storage box portion located outside the second working window are respectively flush with the left and right side surfaces and the bottom surface of the outer shell, and the length and height thereof are greater than the length and height of the liquid storage box portion located inside the second working window, and the transition between the two is a limiting surface; the limiting surface and the front side wall of the outer shell are formed with matching positioning protrusions and positioning grooves;

[0024] And / or, a U-shaped groove-shaped cover is provided above the liquid storage box portion located outside the second working window, and a longer groove side of the cover is clamped on the outer shell.

[0025] Furthermore, the liquid storage box portion located inside the second working window is arc-shapedly recessed below one end facing the rear side wall of the outer shell to form an arc-shaped surface; a protruding arc-shaped supporting surface is provided inside the bottom surface of the outer shell; after the liquid storage box is inserted into the outer shell, the arc-shaped surface contacts the arc-shaped supporting surface;

[0026] And / or, the lower part of the liquid storage box located outside the second working window is in an arc transition and has a concave handrail groove;

[0027] And / or, a waste residue opening is provided on the upper surface of the liquid storage box portion located outside the second working window.

[0028] Furthermore, a main portion of the connecting pipe between the pump and the liquid storage tank is located in a gap between the inner shell and the outer shell.

[0029] The beneficial effects of the utility model are:

[0030] In the desktop small-sized waste gas filtering and discharging machine of the utility model, the insertion and removal method of the liquid storage tank is changed, and the auxiliary transmission structure for synchronously driving the negative pressure cabin plate, the water curtain plate and the submersible pump to lift in the prior art is cancelled, so that the overall structure is simpler. At the same time, the closed structure of the liquid storage tank can reduce the volatilization of the liquid medium during use or extraction, and it is not easy to spill. Moreover, the upper air suction port and the lower air suction port formed by the cooperation of the inner shell, the sailboard and the curtain plate are located at different upper and lower positions, and the area between the curtain plate and the sailboard has a negative pressure suction effect, which can greatly reduce the escape of the waste gas paint mist and improve the convenience of operation without deliberately approaching the upper air suction port or the lower air suction port. Finally, the gap between the outer shell and the inner shell can be used as the installation space for the remaining components, which is also conducive to reducing noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 It is a schematic diagram of the three-dimensional structure of the desktop small-scale exhaust gas filtering and discharging machine in the embodiment.

[0033] Figure 2 It is a front view of the desktop small exhaust gas filtering and discharging machine in the embodiment.

[0034] Figure 3 for Figure 2 AA section view.

[0035] Figure 4 It is a schematic diagram of the exploded structure of the desktop small-sized exhaust gas filtering and discharging machine in the embodiment.

[0036] Figure 5 The combined structure of the outer shell and the inner shell of the embodiment is shown in FIG. Figure 1 .

[0037] Figure 6 The combined structure of the outer shell and the inner shell of the embodiment is shown in FIG. Figure 2 .

[0038] Figure 7 The combined structure of the outer shell and the inner shell of the embodiment is shown in FIG. Figure 3 .

[0039] Wherein, the accompanying drawings are marked as follows:

[0040] 100 - outer shell, 110 - first working window, 120 - second working window, 130 - third working window, 140 - positioning groove, 150 - arc-shaped supporting surface;

[0041] 200 - inner shell, 210 - flow guiding slope, 220 - confluence groove, 221 - drainage port, 222 - flow guiding tube;

[0042] 300- fan;

[0043] 400- sailboard, 410- negative pressure working area, 420- upper air extraction port, 430- air inlet;

[0044] 500-curtain plate, 510-auxiliary air flow channel, 511-lower air extraction port, 520-baffle, 530-porous plate;

[0045] 600-liquid storage tank, 610-overflow port;

[0046] 700-liquid storage box, 710-liquid inlet, 720-fourth working window hole, 730-buffer groove, 740-positioning protrusion, 750-cover body, 760-arc surface, 770-handrail groove, 780-waste residue outlet;

[0047] 800-Pump;

[0048] 900 - Connecting pipe. DETAILED DESCRIPTION

[0049] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0050] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention.

[0051] The embodiments of the utility model are described in detail below with reference to the accompanying drawings.

[0052] This embodiment provides a desktop small exhaust gas filter discharge machine, such as 1 and the attached Figure 2As shown, it is intended to simplify the overall structure of the exhaust gas filtering and emission machine.

[0053] Specifically, the exhaust gas filter exhauster includes an outer shell 100 which is generally in the shape of a hollow rectangular parallelepiped. Figures 5 to 7 As shown in . A rectangular first working window 110 and a rectangular second working window 120 are provided on the front side wall of the outer shell 100, and the first working window 110 is located above the second working window 120. The area near the first working window 110 is the main working area during the model spray painting operation. A rectangular third working window 130 is provided on the rear side wall of the outer shell 100 to serve as an operating window when other components are connected. An inner shell 200 that is roughly in the shape of a hollow rectangular parallelepiped is provided above the inner side of the outer shell 100. There is a gap between the outer wall of the inner shell 200 and the inner wall of the outer shell 100. The inner shell 200 is open toward the side wall of the first working window 110, and the open edge of the inner shell 200 is connected to the edge of the first working window 110. As a result, the inner shell 200 is reliably fixed in the outer shell 100. A fan 300 is detachably provided on the top of the outer shell 100. The air inlet of the fan 300 passes through the top walls of the outer casing 100 and the inner casing 200 , and is communicated with the inner area of ​​the inner casing 200 .

[0054] A rectangular sailboard 400 is disposed obliquely above the inner shell 200. Figure 3 and attached Figure 4 As shown in . The inclination direction of the sailboard 400 is from the open front side of the inner shell 200 to the lower side of the rear side wall. The inclined upper end and left and right edges of the sailboard 400 are in contact and sealed with the top wall and left and right side walls of the inner shell 200 respectively. There is a certain gap between the inclined lower end of the sailboard 400 and the rear side wall of the inner shell 200. As a result, a substantially closed negative pressure working area 410 is formed behind the sailboard 400, and the air inlet of the fan 200 is connected to the negative pressure working area 410.

[0055] The lower part of the rear side wall of the inner shell 200 is a guide slope 210. The inclination direction of the guide slope 210 is from the rear side wall to the lower part of the open front side. The bottom surface of the inner shell 200 is provided with a confluence groove 220. The confluence groove 220 is roughly parallel to the bottom surface of the outer shell 100, and a drainage port 221 is provided on the bottom of the confluence groove 220. The shape of the drainage port 221 can be a circular hole, a polygonal hole or a waist-shaped hole. A rectangular curtain plate 500 is arranged in parallel above the guide slope 210, that is, the curtain plate 500 is arranged in an inclined manner along the direction of the guide slope 210 and is parallel to the guide slope 210, and an auxiliary air flow channel 510 is formed between the two. The left and right edges of the curtain plate 500 are in contact and sealed with the left and right side walls of the inner shell respectively. The inclined upper end of the curtain plate 500 is located between the inclined lower end of the sailboard 400 and the rear side wall of the inner shell 200. Thus, a V-shaped structure is formed between the curtain board 500 and the sail board 400. Figure 3 and attached Figure 4As shown in . A liquid storage tank 600 is provided at the inclined upper end of the curtain plate 500. The liquid storage tank is arranged along the length direction of the inclined upper end of the curtain plate 500. There is a certain gap between the liquid storage tank 600 and the inclined lower end of the sailboard 400 and the rear side wall of the inner shell 200. Therefore, the liquid storage tank 600 will not block the communication between the negative pressure working area 410 and the auxiliary air flow channel 510. The length of the liquid storage tank 600 is roughly consistent with the length of the curtain plate 500 (the distance between the left and right edges of the curtain plate 500). A rectangular overflow port 610 is provided near the connection between the liquid storage tank 600 and the inclined upper end of the curtain plate 500. Two liquid inlet interfaces are also provided on the liquid storage tank 600. The two liquid inlet interfaces pass through the rear side wall of the inner shell 200 and extend to the vicinity of the third working window 130. The inclined lower end of the curtain plate 500 faces the confluence groove 220. Thus, after the liquid medium (such as water) used to capture the waste gas paint mist flows out from the overflow port 610 on the liquid storage tank 600, a liquid curtain is formed on the upper surface of the curtain plate 500, and part of the waste gas paint mist is captured and adsorbed after contacting with the liquid curtain. At the same time, the gap between the inclined lower end of the sailboard 400 and the upper surface of the curtain plate 500 constitutes the upper air suction port 420. Under the suction action of the fan 300, the air above the area between the curtain plate 500 and the sailboard 400 and the waste gas paint mist that is not captured and adsorbed by the liquid curtain can enter the negative pressure working area 410 from the upper air suction port 420, and finally be discharged through the fan 300. Moreover, since the liquid storage tank 600 does not block the auxiliary air flow channel 510 from communicating with the negative pressure working area 410, the inlet of the auxiliary air flow channel 510, that is, the gap between the inclined lower end of the curtain plate 500 and the inclined lower end of the guide slope 210, constitutes the lower air suction port 511. The air below the area between the curtain plate 500 and the sailboard 400 and the waste paint mist that is not captured and adsorbed by the liquid curtain can enter the negative pressure working area 410 through the auxiliary air flow channel 510, and finally be discharged through the fan 300. The upper and lower positions of the upper air inlet 420 and the lower air inlet 511 allow the area between the curtain plate 500 and the sailboard 400 to have a strong negative pressure suction effect, which can greatly reduce the escape of waste paint mist and improve the convenience of operation without having to deliberately approach the upper air inlet 420 or the air inlet 511.

[0056] The exhaust gas filter and discharge machine further includes a liquid storage box 700. The liquid storage box 700 is generally a closed structure, a part of which is inserted into the area between the bottom surface of the inner shell 200 and the bottom surface of the outer shell 100 through the second working window 120, and the other part is located outside the second working window 120, that is, outside the outer shell 100. A liquid inlet 710 is provided on the upper surface of the liquid storage box 700 located inside the second working window 120. The liquid medium discharged from the liquid discharge port 221 can enter the liquid storage box 700 through the liquid inlet 710. A fourth working window hole 720 is provided on the upper surface of the liquid storage box 700 located outside the second working window 120. The pump 800 is placed in the liquid storage box 700 through the fourth working window hole 720, and the output end of the pump 800 is connected to the two liquid inlet interfaces through a connecting pipe 900. The connecting pipe 900 is located in the gap between the outer shell 100 and the inner shell 200 except for the part connected to the pump 800, and the rest of the connecting pipe 900 is hidden in the gap between the outer shell 100 and the inner shell 200. Thus, the pump 800 can continuously circulate and extract the liquid medium buffered in the liquid storage tank 700 into the liquid storage tank 600, and form a continuous liquid curtain on the upper surface of the curtain plate 500 after flowing out from the overflow port 610. When the liquid medium in the liquid storage tank 700 needs to be replaced, the connection point between the pump 800 and the connecting pipe 900 is removed to quickly extract the liquid from the liquid storage tank 700.

[0057] In the desktop small-sized exhaust gas filtering and discharging machine in this embodiment, the insertion and removal method of the liquid storage tank is changed, and the auxiliary transmission structure that synchronously drives the negative pressure cabin board, water curtain board and submersible pump to lift in the prior art is cancelled, making the overall structure simpler. At the same time, the closed structure of the liquid storage tank can reduce the volatilization of the liquid medium during use or extraction, and it is not easy to spill. Moreover, the upper and lower air suction ports formed by the cooperation of the inner shell, the sailboard and the curtain board are located at different upper and lower positions, and the area between the curtain board and the sailboard has a negative pressure suction effect, which can greatly reduce the escape of exhaust gas paint mist and improve the convenience of operation without deliberately approaching the upper or lower air suction port. Finally, the gap between the outer shell and the inner shell can be used as the installation space for the remaining components, which is also conducive to reducing noise.

[0058] In this embodiment, the length of the overflow port 610 is roughly the same as the length of the inclined upper end of the curtain plate 500. The width of the overflow port 610 is roughly 0.1~5cm. At the same time, the lower edge of the overflow port 610 is flush with the upper surface of the curtain plate 500. The upper edge of the overflow port 610 is serrated. Due to the influence of the serrated upper edge of the overflow port 610, the liquid medium can cover the entire upper surface of the curtain plate 500, that is, there is no empty area without liquid curtain on the left and right sides of the curtain plate 500, thereby not affecting the effect of the liquid curtain capturing the exhaust gas paint mist.

[0059] In this embodiment, baffles 520 are provided on the left and right sides of the curtain plate 500. Figure 4As shown in . On the one hand, the curtain plate can be installed obliquely in the inner shell through the baffle plate and the screws passing through the baffle plate; on the other hand, the baffle plate can also play a role in restraining the liquid medium to prevent the liquid medium from flowing out from the left and right sides of the curtain plate.

[0060] In this embodiment, a porous plate 530 is provided at the inclined lower end of the curtain plate 500 along its length direction. Figure 4 As shown in . The holes on the porous plate 530 can be one or more of circular holes, polygonal holes, waist-shaped holes, and fan-shaped holes. The porous plate 530 is not flush with the surface of the curtain plate 500, that is, the porous plate 530 and the curtain plate 500 are arranged at an obtuse angle, and the porous plate 530 is roughly vertically facing the bottom surface of the inner shell 200. The porous plate 530 can completely block the lower air suction port 511, or only partially block the lower air suction port 511. As a result, the liquid medium on the curtain plate 500 continues to flow along the porous plate 530 after the inclined lower end of the curtain plate 500. On the one hand, under the suction action of the fan, the air carrying the exhaust paint mist can pass through the porous plate, increasing the contact time between the exhaust paint mist and the liquid medium, and improving the capture and adsorption effect of the exhaust paint mist; on the other hand, the liquid medium can be slightly atomized when passing through the porous plate, which can further improve the capture effect of the exhaust paint mist. Furthermore, in this embodiment, the edge of the porous plate 530 away from the curtain plate 500 is serrated. Therefore, the serrated edge structure on the porous plate can reduce the splashing of liquid and is also conducive to reducing the wind noise at the lower air outlet.

[0061] In this embodiment, in order to increase the air intake volume of the upper air intake port, a plurality of air intake holes 430 are provided near the inclined lower end of the sailboard 400. Figure 2 and attached Figure 4 As shown in . The air inlet 430 can be one or more of a circular hole, a polygonal hole, a waist-shaped hole, and a fan-shaped hole. Furthermore, in this embodiment, the inclined lower end of the sailboard 400 is serrated. The serrated structure is conducive to reducing the wind noise at the upper air intake port.

[0062] In this embodiment, the upper surface of the liquid storage box 700 located inside the second working window 120 is a trapezoidal depression with a larger top and a smaller bottom to form a buffer groove 730. Figure 5 and attached Figure 7As shown in . The liquid inlet 710 is located at the bottom of the cache groove 730. After the liquid storage box 700 is inserted into the lower outer shell 100, the liquid discharge port 221 faces the cache groove 730. Therefore, even if the positions of the liquid inlet 710 and the liquid discharge port 221 are staggered, it will not affect the liquid medium entering the liquid storage box 700. At the same time, the lower edge of the liquid discharge port 221 extends toward the bottom surface of the outer shell 100 to form a guide tube 222. The lower end of the guide tube 222 extends to above the bottom of the cache groove 730. The guide tube 222 can better guide the liquid medium to the cache groove 730. At the same time, during the extraction and insertion process of the liquid storage box 700, the cache groove 730 can also serve as a avoidance space for the guide tube 222, which does not affect the extraction and insertion process of the liquid storage box 700.

[0063] In this embodiment, the upper surface of the portion of the liquid storage box 700 located at the second working window 120 is roughly flush with the upper surface of the inner shell 200, and can be used as a working surface for temporarily placing models or tools. The left and right side surfaces and the bottom surface of the portion of the liquid storage box 700 located outside the second working window 120 are roughly flush with the left and right side surfaces and the bottom surface of the outer shell 100. The length and height of the portion of the liquid storage box 700 located inside the second working window 120 are smaller than the length and height of the portion of the liquid storage box 700 located outside the second working window 120. As a result, the liquid storage box 700 as a whole is composed of two rectangular parallelepiped parts of different sizes, and the transition surfaces of the two form a limiting surface. During the process of inserting the liquid storage box 700 into the outer shell 100, when the limiting surface is against the front side wall of the outer shell 100, the liquid storage box 700 is installed in place. At the same time, positioning grooves 140 are respectively formed on both sides of the front side wall of the outer shell 100. Positioning protrusions 740 are formed at corresponding positions on the limiting surface of the liquid storage box 700. During the process of inserting the liquid storage box 700 into the outer shell 100, the positioning protrusion 740 is gradually inserted into the positioning groove 140. The cooperation between the positioning protrusion 740 and the positioning groove 140 can further improve the stability of the liquid storage box 700 when inserted into the outer shell 100. In addition, a U-shaped groove-shaped cover 750 is provided outside the upper front side wall of the outer shell 100. The opening of the cover 750 faces downward, and the long side of the groove is clamped on the outer shell 100.

[0064] In this embodiment, the lower part of the liquid storage box 700 located inside the second working window 120 facing the rear side wall of the outer shell 100 is arc-shaped and concave, forming an arc-shaped surface 760. A protruding arc-shaped support surface 150 is provided inside the bottom surface of the outer shell 100. The arc-shaped support surface 150 can be formed by the bottom concave of the outer shell 100. After the liquid storage box 700 is inserted into the outer shell 100, the arc-shaped surface 760 and the arc-shaped support surface 150 are in contact, preventing the liquid storage box 700 from being further inserted, and providing appropriate support for the end of the liquid storage box 700. Further, in this embodiment, the lower part of the liquid storage box 700 located outside the second working window 120 is circularly transitioned and has a concave handrail groove 770. The handrail groove 770 can facilitate the pulling and pulling of the liquid storage box 700. In this embodiment, a through waste residue port 780 is also provided on the upper surface of the liquid storage box 700 located outside the second working window 120. The waste port 780 can be used to dump waste liquid, and can also be used to temporarily fix operating tools, etc.

Claims

1. A desktop small exhaust gas filter and discharge machine, characterized in that: include: An outer shell, wherein a first working window and a second working window are formed on a front side wall of the outer shell; the first working window is located above the second working window; An inner shell with an open front side wall, the inner shell is arranged above the inner side of the outer shell, and the open edge of the inner shell is connected to the edge of the first working window; the lower part of the rear side wall of the inner shell is a guide slope, and the inclination direction of the guide slope is from the rear side wall to the lower part of the open front side; the bottom surface of the inner shell is provided with a confluence groove; the bottom of the confluence groove is provided with a drainage port; A sailboard, wherein the sailboard is arranged in the inner shell body from the open front side of the inner shell body to the lower side of the rear side wall at an angle; the inclined upper end and left and right edges of the sailboard are respectively in contact and sealed with the top wall and left and right side walls of the inner shell body, and a negative pressure working area is formed behind the sailboard; a gap is formed between the inclined lower end of the sailboard and the rear side wall of the inner shell body; A fan, the fan being arranged on the top of the outer shell, and having an air inlet connected to the negative pressure working area; A curtain plate, wherein the curtain plate is tilted and arranged in the inner shell along a direction parallel to the guide slope, and the left and right edges thereof are in contact and sealed with the left and right side walls of the inner shell; an auxiliary air flow channel is formed between the curtain plate and the guide slope; the inclined upper end of the curtain plate is located between the inclined lower end of the sail plate and the rear side wall of the inner shell, and the gap between the curtain plate and the inclined lower end of the sail plate forms an upper air suction port; the gap between the inclined lower end of the curtain plate and the inclined lower end of the guide slope forms a lower air suction port of the auxiliary air flow channel; A liquid storage tank, the liquid storage tank is arranged at the inclined upper end of the curtain plate, and does not block the communication between the auxiliary air flow channel and the negative pressure working area; a rectangular overflow port is provided near the connection between the liquid storage tank and the curtain plate; the liquid medium in the liquid storage tank flows out from the overflow port to form a liquid curtain on the upper surface of the curtain plate, and finally converges in the confluence groove; A liquid storage box of a closed structure, wherein a portion of the liquid storage box is inserted into the area between the bottom surface of the inner shell and the bottom surface of the outer shell through the second working window; a liquid inlet is provided on the upper surface of the liquid storage box located inside the second working window; the liquid inlet cooperates with the liquid discharge port to transfer the liquid medium in the confluence trough into the liquid storage box; a fourth working window hole is provided on the upper surface of the liquid storage box located outside the second working window; A pump is placed in the liquid storage tank through the fourth working window hole, and its output end is connected with the liquid storage tank through a connecting pipe; the pump circulates and draws the liquid medium in the liquid storage tank to the upper surface of the curtain plate to form a continuous liquid curtain.

2. The desktop small exhaust gas filter and discharge machine according to claim 1 is characterized in that: The length of the overflow port is consistent with the length of the inclined upper end of the curtain plate, and the upper edge thereof is serrated.

3. The desktop small-sized exhaust gas filter and discharge machine according to claim 1 is characterized in that: Baffles are provided on the left and right sides of the curtain plate; And / or, a porous plate is provided at the inclined lower end of the curtain plate along its length direction; the porous plate is arranged at an obtuse angle with the curtain plate and is vertically oriented toward the bottom surface of the inner shell.

4. The desktop small-sized exhaust gas filter and discharge machine according to claim 3 is characterized in that: The edge of one end of the porous plate away from the curtain plate is serrated.

5. The desktop small-sized exhaust gas filter and discharge machine according to claim 1 is characterized in that: A plurality of air inlet holes are provided near the inclined lower end of the sailboard; And / or, the inclined lower end of the sailboard is serrated.

6. The desktop small-sized exhaust gas filter and discharge machine according to claim 1 is characterized in that: The upper surface of the liquid storage box portion located inside the second working window is provided with a buffer groove, and the liquid inlet is located at the bottom of the buffer groove.

7. The desktop small-sized exhaust gas filter and discharge machine according to claim 6 is characterized in that: The lower edge of the liquid discharge port extends toward the bottom surface of the outer shell to form a guide tube; the lower end of the guide tube extends to above the bottom of the cache groove.

8. The desktop small-sized exhaust gas filter and discharge machine according to claim 1 is characterized in that: The left and right side surfaces and the bottom surface of the liquid storage box portion located outside the second working window are respectively flush with the left and right side surfaces and the bottom surface of the outer shell, and the length and height thereof are greater than the length and height of the liquid storage box portion located inside the second working window, and the transition between the two is a limiting surface; the limiting surface and the front side wall of the outer shell are formed with matching positioning protrusions and positioning grooves; And / or, a U-shaped groove-shaped cover is provided above the liquid storage box portion located outside the second working window, and a longer groove side of the cover is clamped on the outer shell.

9. The desktop small-sized exhaust gas filter and discharge machine according to claim 1 is characterized in that: The liquid storage box portion located inside the second working window is concave in an arc shape below one end facing the rear side wall of the outer shell to form an arc surface; a protruding arc-shaped supporting surface is provided inside the bottom surface of the outer shell; after the liquid storage box is inserted into the outer shell, the arc-shaped surface contacts the arc-shaped supporting surface; And / or, the lower part of the liquid storage box located outside the second working window is in an arc transition and has a concave handrail groove; And / or, a waste residue opening is provided on the upper surface of the liquid storage box portion located outside the second working window.

10. The desktop small-sized exhaust gas filter and discharge machine according to claim 1 is characterized in that: A major portion of the connection pipe between the pump and the liquid storage tank is located in the gap between the inner shell and the outer shell.

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