A low-oxygen closed modified atmosphere storage device for postharvest grapes

Abstract

The application provides a postharvest low-oxygen closed air-conditioning preservation storage device for grapes, belonging to the technical field of fruit preservation, which comprises a storage box, a containing disc, a anti-blocking gas conveying assembly, a gas inlet pipe, a gas outlet pipe and a carbon dioxide detector, the containing disc is fixedly installed on the bottom of the inner side of the storage box, a gas conveying chamber is arranged in the containing disc, the gas inlet pipe and the gas outlet pipe are fixedly arranged on the outer wall of the storage box, the gas inlet pipe is in communication with the gas conveying chamber, and the gas outlet pipe is in communication with the inner cavity of the storage box. Compared with the prior art, the embodiment of the application can automatically adjust the oxygen in the storage box when the grapes are stored, so that a low-oxygen environment is maintained in the storage box, thereby improving the preservation effect of the grapes, and the oxygen supply effect and efficiency are improved because the oxygen input is prevented from being blocked due to the existence of the grapes during the oxygen regulation process for storing the grapes.

Description

Technical Field

[0001] This invention belongs to the field of fruit preservation technology, specifically a post-harvest low-oxygen, closed-atmosphere modified atmosphere storage device for grapes. Background Technology

[0002] Currently, grapes are still active after harvesting and will continue to respire. Therefore, when storing grapes after harvesting, it is necessary to regularly introduce air into the storage equipment to reduce the carbon dioxide content and achieve low-oxygen preservation of the grapes.

[0003] In existing technologies, harvested grapes are mostly placed on shelves inside storage equipment. To ensure that air can be widely circulated into the storage equipment, existing shelves are mostly equipped with several evenly distributed air inlets. Some of these air inlets are connected to an external air supply mechanism, which delivers outside air to these air inlets, and then from these air inlets into the storage equipment. At this time, the air can pass through the gaps between the grapes, thereby carrying away the carbon dioxide produced by the grapes' respiration and creating a low-oxygen environment inside the storage equipment. However, when the harvested grapes are placed on the shelves, they can easily block some or all of the air inlets, making it difficult for outside air to be smoothly and quickly circulated into the storage equipment, thus affecting the oxygen supply effect and efficiency. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by the embodiments of the present invention is to provide a post-harvest low-oxygen closed modified atmosphere storage device for grapes.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] A post-harvest low-oxygen, closed-atmosphere controlled atmosphere storage device for grapes includes a storage box, a tray, an anti-clogging gas delivery assembly, an inlet pipe, an exhaust pipe, and a carbon dioxide detector.

[0007] The holding tray is fixedly installed inside the bottom of the storage box, and the inside of the holding tray is provided with a gas delivery chamber.

[0008] The intake pipe and the exhaust pipe are fixedly installed on the outer wall of the storage box. The intake pipe is connected to the air delivery chamber, and the exhaust pipe is connected to the inner cavity of the storage box.

[0009] The carbon dioxide detector is fixedly installed on the top inner side of the storage box and is used to detect the carbon dioxide concentration inside the storage box.

[0010] The anti-clogging gas delivery assembly is located on the upper part of the holding tray and is used to deliver air that has been delivered to the inside of the gas delivery chamber via the air inlet pipe to the inside of the storage box through the upper surface of the holding tray.

[0011] As a further improvement of the present invention: the upper part of the holding tray is provided with a plurality of evenly distributed grooves, and the bottom of the grooves is provided with through holes communicating with the gas delivery chamber.

[0012] The anti-clogging gas delivery assembly includes several gas delivery caps.

[0013] A plurality of gas-transmitting caps correspond one-to-one with a plurality of grooves. The plurality of gas-transmitting caps are respectively fixedly installed on the bottom inner side of the plurality of grooves and communicate with the through holes. An annular gas-transmitting channel is formed between the gas-transmitting caps and the corresponding grooves. A plurality of gas-transmitting holes are provided on the circumferential sidewalls of the gas-transmitting caps.

[0014] The diameter of the gas-transmitting cap is larger than the diameter of the grape.

[0015] As a further improvement of the present invention: the intake pipe includes a first intake pipe, a second intake pipe, and a third intake pipe.

[0016] The second air inlet pipe is fixedly installed on the outer wall of the storage box. One end of the first air inlet pipe is connected to the second air inlet pipe, and the other end is connected to an external fan. One end of the third air inlet pipe is connected to the second air inlet pipe, and the other end passes through the side wall of the storage box and the side wall of the holding tray and communicates with the air delivery chamber.

[0017] The exhaust pipe assembly includes a first exhaust pipe and a second exhaust pipe.

[0018] The first exhaust pipe is fixedly installed on the top of the storage box, and the second exhaust pipe is fixedly installed on the side wall of the first exhaust pipe and communicates with the first exhaust pipe.

[0019] As a further improvement of the present invention: the second air intake pipe is provided with a first sealing component, and the first exhaust pipe is provided with a second sealing component. When the external fan delivers outside air into the storage box to make the storage box present a low-oxygen environment, the first sealing component is used to seal the third air intake pipe, and the second sealing component is used to seal the second exhaust pipe.

[0020] As a further improvement of the present invention: the first sealing assembly includes a first sealing block and an elastic element.

[0021] The first sealing block is movably disposed inside the second air intake pipe. One end of the elastic element is connected to the bottom of the first sealing block, and the other end is connected to the inner bottom wall of the second air intake pipe, which is used to provide elastic support for the first sealing block.

[0022] As a further improvement of the present invention: the elastic element is a spring or a metal sheet.

[0023] As a further improvement of the present invention: the second sealing assembly includes a second sealing block, a connecting rod, and a piston block.

[0024] The second sealing block is movably disposed inside the first exhaust pipe, the piston block is movably disposed inside the second intake pipe, one end of the connecting rod extends from the top of the second intake pipe into the second intake pipe and is fixedly connected to the piston block, and the other end extends from the top of the first exhaust pipe into the first exhaust pipe and is fixedly connected to the second sealing block.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] In this embodiment of the invention, the post-harvest grape preservation chamber allows harvested grapes to be placed on top of a holding tray. A carbon dioxide detector monitors the carbon dioxide concentration inside the storage chamber in real time. When the detector detects a carbon dioxide concentration higher than a predetermined value, an air inlet pipe supplies outside air into the air delivery chamber. From there, air is delivered into the storage chamber via an anti-clogging air delivery assembly on the upper surface of the holding tray. At this point, the air, carrying carbon dioxide, is expelled through the exhaust pipe, thus reducing the carbon dioxide concentration inside the storage chamber and maintaining a low-oxygen environment, thereby achieving grape preservation. The aforementioned anti-clogging air delivery... The component delivers air from the air supply chamber to the storage box while also preventing blockages. This effectively prevents grapes placed on top of the tray from clogging the air entering the storage box, ensuring smooth air intake and improving oxygen supply efficiency. Compared to existing technologies, this system automatically regulates oxygen levels inside the storage box during post-harvest grape storage, maintaining a low-oxygen environment to enhance grape preservation. Furthermore, the oxygen regulation process effectively prevents oxygen input obstruction due to the presence of grapes, further improving oxygen supply efficiency. Attached Figure Description

[0027] Figure 1 A schematic diagram of a post-harvest low-oxygen, closed-atmosphere controlled atmosphere storage device for grapes. Figure 1 ;

[0028] Figure 2 A schematic diagram of a post-harvest low-oxygen, closed-atmosphere controlled atmosphere storage device for grapes. Figure 2 ;

[0029] Figure 3 This is a schematic diagram of the structure of a tray in a low-oxygen, closed-atmosphere modified atmosphere storage device for grapes after harvest.

[0030] Figure 4 for Figure 1 Enlarged view of region A in the middle;

[0031] Figure 5 for Figure 1 Enlarged view of region B in the middle;

[0032] Figure 6 for Figure 1 Enlarged diagram of region C in the middle;

[0033] Figure 7 for Figure 3 Enlarged schematic diagram of region D in the middle;

[0034] In the diagram: 10-Storage box, 20-Packing tray, 201-Gas delivery chamber, 202-Groove, 203-Through hole, 30-Anti-clogging gas delivery assembly, 301-Gas delivery cap, 302-Gas delivery hole, 40-Inlet pipe, 401-First inlet pipe, 402-Second inlet pipe, 403-Third inlet pipe, 50-First sealing assembly, 501-First sealing block, 502-Elastic element, 60-Exhaust pipe, 601-First exhaust pipe, 602-Second exhaust pipe, 70-Second sealing assembly, 701-Second sealing block, 702-Connecting rod, 703-Piston block, 80-Carbon dioxide detector. Detailed Implementation

[0035] The technical solution of the present invention will be further described in detail below with reference to specific embodiments.

[0036] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0037] Please see Figure 1 , Figure 2 , Figure 3 as well as Figure 4This embodiment provides a post-harvest low-oxygen closed-atmosphere modified atmosphere storage device for grapes, including a storage box 10, a holding tray 20, an anti-clogging gas delivery assembly 30, an air inlet pipe 40, an exhaust pipe 60, and a carbon dioxide detector 80. The holding tray 20 is fixedly installed on the bottom inner side of the storage box 10, and the holding tray 20 has an air delivery chamber 201 inside. The air inlet pipe 40 and the exhaust pipe 60 are fixedly installed on the outer wall of the storage box 10. The air inlet pipe 40 is connected to the air delivery chamber 201, and the exhaust pipe 60 is connected to the inner cavity of the storage box 10. The carbon dioxide detector 80 is fixedly installed on the top inner side of the storage box 10 for detecting the carbon dioxide concentration inside the storage box 10. The anti-clogging gas delivery assembly 30 is located on the upper part of the holding tray 20 and is used to deliver the air delivered to the air delivery chamber 201 via the air inlet pipe 40 to the inside of the storage box 10 through the upper surface of the holding tray 20.

[0038] The post-harvest preservation chamber for grapes allows harvested grapes to be placed on top of a holding tray 20. A carbon dioxide detector 80 monitors the carbon dioxide concentration inside the storage box 10 in real time. When the detector detects a concentration higher than a predetermined value, an air inlet pipe 40 delivers outside air to the air delivery chamber 201, which is then transported to the storage box 10 by an anti-clogging air delivery component 30 on the upper surface of the holding tray 20. At this point, the air, carrying carbon dioxide, is discharged through the exhaust pipe 60, thus reducing the carbon dioxide concentration inside the storage box 10 and maintaining a low-oxygen environment, thereby achieving grape preservation. The anti-clogging air delivery component 30 delivers air from the air delivery chamber 201 to the storage box 10 while also preventing clogging, effectively avoiding the grapes on top of the holding tray 20 from blocking the air entering the storage box 10. This ensures smooth input of outside air and improves the oxygen supply effect and efficiency inside the storage box 10.

[0039] Please see Figure 7 In one embodiment, the upper part of the holding tray 20 is provided with a plurality of evenly distributed grooves 202, and the bottom of the grooves 202 is provided with through holes 203 communicating with the gas delivery chamber 201. The anti-clogging gas delivery assembly 30 includes a plurality of gas delivery caps 301, and the plurality of gas delivery caps 301 correspond one-to-one with the plurality of grooves 202. The plurality of gas delivery caps 301 are respectively fixedly installed on the bottom inner side of the plurality of grooves 202 and communicate with the through holes 203. An annular gas delivery channel is formed between the gas delivery caps 301 and the corresponding grooves 202. A plurality of gas delivery holes 302 are provided on the circumferential sidewall of the gas delivery caps 301.

[0040] After the grapes are placed on the upper part of the holding tray 20, the grapes may be placed in one of three states: first, the grapes are directly on the upper surface of the holding tray 20; second, the grapes are between the upper surface of the holding tray 20 and the gas supply cap 301; and third, the grapes are directly on the upper surface of the gas supply cap 301. When the air inlet pipe 40 delivers outside air into the gas supply chamber 201, the outside air can enter the gas supply cap 301 through the through hole 203, then enter the annular gas supply channel through the gas supply hole 302, and finally be output upward through the annular gas supply channel. At this time, no matter what state the grapes are placed in, the outside air output upward through the annular gas supply chamber will not be blocked by the grapes, so that the air can be smoothly delivered into the storage box 10, thereby efficiently replacing the high concentration of carbon dioxide inside the storage box 10 and maintaining a low-oxygen environment inside the storage box 10.

[0041] In one embodiment, the diameter of the air-conveying cap 301 is larger than the diameter of the grapes. Because the diameter of the air-conveying cap 301 is larger than the diameter of the grapes, when the grapes are placed on the upper part of the holding tray 20 and act on the annular air-conveying channel between the holding tray 20 and the air-conveying cap 301, the grapes cannot completely cover the annular air-conveying channel. The grapes can only occupy part of the annular air-conveying channel area, thereby allowing the outside air entering the annular air-conveying channel to be smoothly transported upward, thus effectively preventing the transport of outside air from being blocked by the grapes.

[0042] Please see Figure 1 , Figure 4 as well as Figure 6 In one embodiment, the air intake pipe 40 includes a first air intake pipe 401, a second air intake pipe 402, and a third air intake pipe 403. The second air intake pipe 402 is fixedly installed on the outer wall of the storage box 10. One end of the first air intake pipe 401 is connected to the second air intake pipe 402, and the other end is connected to an external fan (not shown in the figure). One end of the third air intake pipe 403 is connected to the second air intake pipe 402, and the other end passes through the side wall of the storage box 10 and the side wall of the holding tray 20 and is connected to the air delivery chamber 201. The exhaust pipe 60 includes a first exhaust pipe 601 and a second exhaust pipe 602. The first exhaust pipe 601 is fixedly installed on the top of the storage box 10, and the second exhaust pipe 602 is fixedly installed on the side wall of the first exhaust pipe 601 and is connected to the first exhaust pipe 601.

[0043] When the carbon dioxide detector 80 detects that the carbon dioxide concentration inside the storage box 10 has reached a predetermined value, the external fan is activated to deliver outside air from the first air inlet pipe 401 to the second air inlet pipe 402, and then to the air delivery chamber 201 through the third air inlet pipe 403. After the outside air enters the air delivery chamber 201, it enters the air delivery cap 301 through the through hole 203, and then is delivered to the annular air delivery channel through several air delivery holes 203. Finally, it is output upward through the annular air delivery channel and enters the storage box 10. When the outside air enters the storage box 10, it carries carbon dioxide, causing the carbon dioxide to enter the first exhaust pipe 601, and then be discharged to the outside through the second exhaust pipe 602. This reduces the carbon dioxide content inside the storage box 10 and maintains a low-oxygen environment inside the storage box 10.

[0044] Please see Figure 1 , Figure 4 as well as Figure 6 In one embodiment, the second air inlet pipe 402 is provided with a first sealing component 50, and the first exhaust pipe 601 is provided with a second sealing component 70. When the external fan delivers outside air into the storage box 10 to create a low-oxygen environment inside the storage box 10, the first sealing component 50 is used to seal the third air inlet pipe 403, and the second sealing component 70 is used to seal the second exhaust pipe 602, thereby isolating the inside of the storage box 10 from the outside world, thus ensuring that the inside of the storage box 10 can maintain a low-oxygen state for a certain period of time and improving the preservation effect of grapes.

[0045] Please see Figure 4 In one embodiment, the first sealing assembly 50 includes a first sealing block 501 and an elastic member 502. The first sealing block 501 is movably disposed inside the second air intake pipe 402. One end of the elastic member 502 is connected to the bottom of the first sealing block 501, and the other end is connected to the inner bottom wall of the second air intake pipe 402, for providing elastic support for the first sealing block 501.

[0046] When the external fan is not in operation, the first sealing block 501 remains stationary at the connection position between the third air intake pipe 403 and the second air intake pipe 402 under the elastic support of the elastic element 502. At this time, the first sealing block 501 blocks the third air intake pipe 403 to prevent outside air from entering the interior of the third air intake pipe 403 through the first air intake pipe 401 and the second air intake pipe 402. When the external fan is in operation, outside air is transported to the interior of the second air intake pipe 402 through the first air intake pipe 401, which increases the pressure inside the second air intake pipe 402. Under the action of increased pressure, the first sealing block 501 moves downward along the interior of the second air intake pipe 402. This exposes the connection between the third air intake pipe 403 and the second air intake pipe 402. Subsequently, the air inside the second air intake pipe 402 smoothly enters the air delivery chamber 201 through the third air intake pipe 403, and then enters the storage box 10 through the air delivery chamber 201, the through hole 203, the air delivery hole 302, and the annular air delivery chamber. After the external fan has been working for a period of time, reducing the carbon dioxide content inside the storage box 10 to a predetermined value and creating a low-oxygen state inside the storage box 10, the external fan stops working, and the elastic element 502 pushes the first sealing block 501 upward along the inside of the second air intake pipe 402 to re-seal the third air intake pipe 403.

[0047] In one embodiment, the elastic element 502 can be a spring or a metal sheet, and there is no limitation on this.

[0048] Please see Figure 5 as well as Figure 7 In one embodiment, the second sealing assembly 70 includes a second sealing block 701, a connecting rod 702, and a piston block 703. The second sealing block 701 is movably disposed inside the first exhaust pipe 601, and the piston block 703 is movably disposed inside the second intake pipe 402. One end of the connecting rod 702 extends from the top of the second intake pipe 402 into the interior of the second intake pipe 402 and is fixedly connected to the piston block 703. The other end extends from the top of the first exhaust pipe 601 into the interior of the first exhaust pipe 601 and is fixedly connected to the second sealing block 701.

[0049] When the external fan is not in operation, the second sealing block 701 is located at the connection between the first exhaust pipe 601 and the second exhaust pipe 602. At this time, the second sealing block 701 blocks the second exhaust pipe 602 to prevent outside air from entering the storage box 10 through the second exhaust pipe 602 and the first exhaust pipe 601. When the external fan is in operation, outside air is transported to the second intake pipe 402 through the first intake pipe 401, which increases the pressure inside the second intake pipe 402. The piston block 703 moves upward along the inside of the second intake pipe 402 under the increased pressure, and then drives the second piston block 703 through the connecting rod 702. The sealing block 701 moves upward along the inside of the first exhaust pipe 601. When the second sealing block 701 moves upward, it exposes the connection between the second exhaust pipe 602 and the first exhaust pipe 601, allowing the carbon dioxide inside the storage box 10 to be discharged from the first exhaust pipe 601 and the second exhaust pipe 602. After the external fan has been working for a period of time, reducing the carbon dioxide content inside the storage box 10 to a predetermined value and creating a low-oxygen state inside the storage box 10, the external fan stops working. The first sealing block 701 and the piston block 703 move downward under the action of gravity, and the first sealing block 701 seals the second exhaust pipe 602 again.

[0050] In one embodiment, the post-harvest low-oxygen closed-atmosphere controlled atmosphere storage device for grapes further includes a controller. The controller is electrically connected to the carbon dioxide detector 80 and the external fan. When the carbon dioxide detector 80 detects that the carbon dioxide concentration inside the storage box 10 reaches a predetermined value, the carbon dioxide detector 80 sends a signal to the controller, and the controller controls the external fan to work. When the carbon dioxide detector 80 detects that the carbon dioxide concentration inside the storage box 10 decreases to the predetermined value, the controller controls the external fan to stop working.

[0051] In this embodiment of the invention, the post-harvest grape preservation chamber allows harvested grapes to be placed on top of a holding tray 20. A carbon dioxide detector 80 monitors the carbon dioxide concentration inside the storage box 10 in real time. When the detector detects that the carbon dioxide concentration inside the storage box 10 is higher than a predetermined value, an air inlet pipe 40 delivers outside air into the air delivery chamber 201, which is then delivered into the storage box 10 by an anti-clogging air delivery assembly 30 on the upper surface of the holding tray 20. At this time, the air, carrying carbon dioxide, is output through the exhaust pipe 60, thereby reducing the carbon dioxide concentration inside the storage box 10 and maintaining a low-oxygen environment, thus achieving the preservation and storage of grapes. The anti-blocking air delivery component 30 delivers air from the air delivery chamber 201 to the storage box 10 while also preventing blockage. This effectively prevents the grapes placed on top of the holding tray 20 from blocking the air entering the storage box 10, thus ensuring smooth input of outside air and improving the oxygen supply effect and efficiency inside the storage box 10. Compared with existing technologies, when storing grapes after harvest, it can automatically regulate the oxygen inside the storage box 10, maintaining a low-oxygen environment inside the storage box 10, thereby improving the preservation effect of the grapes. Furthermore, during the oxygen regulation process, it can effectively prevent the presence of grapes from obstructing oxygen input, thereby improving the oxygen supply effect and efficiency.

[0052] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A low-oxygen, closed-atmosphere controlled atmosphere storage device for post-harvest grapes, characterized in that, Includes storage boxes, trays, anti-clogging gas delivery components, intake pipes, exhaust pipes, and carbon dioxide detectors. The holding tray is fixedly installed inside the bottom of the storage box, and the inside of the holding tray is provided with a gas delivery chamber. The intake pipe and the exhaust pipe are fixedly installed on the outer wall of the storage box. The intake pipe is connected to the air delivery chamber, and the exhaust pipe is connected to the inner cavity of the storage box. The carbon dioxide detector is fixedly installed on the top inner side of the storage box and is used to detect the carbon dioxide concentration inside the storage box. The anti-clogging gas delivery assembly is located on the upper part of the holding tray and is used to deliver air that has been delivered to the inside of the gas delivery chamber via the air inlet pipe to the inside of the storage box through the upper surface of the holding tray.

2. The grape post-harvest low-oxygen closed-atmosphere controlled atmosphere storage device according to claim 1, characterized in that, The upper part of the holding tray has several evenly distributed grooves, and the bottom of the grooves has through holes that communicate with the gas delivery chamber. The anti-clogging gas delivery assembly includes several gas delivery caps. A plurality of gas-transmitting caps correspond one-to-one with a plurality of grooves. The plurality of gas-transmitting caps are respectively fixedly installed on the bottom inner side of the plurality of grooves and communicate with the through holes. An annular gas-transmitting channel is formed between the gas-transmitting caps and the corresponding grooves. A plurality of gas-transmitting holes are provided on the circumferential sidewalls of the gas-transmitting caps. The diameter of the gas-transmitting cap is larger than the diameter of the grape.

3. The grape post-harvest low-oxygen closed-atmosphere controlled atmosphere storage device according to claim 1, characterized in that, The intake pipe assembly includes a first intake pipe, a second intake pipe, and a third intake pipe. The second air inlet pipe is fixedly installed on the outer wall of the storage box. One end of the first air inlet pipe is connected to the second air inlet pipe, and the other end is connected to an external fan. One end of the third air inlet pipe is connected to the second air inlet pipe, and the other end passes through the side wall of the storage box and the side wall of the holding tray and communicates with the air delivery chamber. The exhaust pipe assembly includes a first exhaust pipe and a second exhaust pipe. The first exhaust pipe is fixedly installed on the top of the storage box, and the second exhaust pipe is fixedly installed on the side wall of the first exhaust pipe and communicates with the first exhaust pipe.

4. The grape post-harvest low-oxygen closed-atmosphere controlled atmosphere storage device according to claim 3, characterized in that, The second intake pipe is provided with a first sealing component, and the first exhaust pipe is provided with a second sealing component. When the external fan delivers outside air into the storage box to create a low-oxygen environment inside the storage box, the first sealing component is used to seal the third intake pipe, and the second sealing component is used to seal the second exhaust pipe.

5. A post-harvest low-oxygen, closed-atmosphere controlled atmosphere storage device for grapes according to claim 4, characterized in that, The first sealing assembly includes a first sealing block and an elastic element. The first sealing block is movably disposed inside the second air intake pipe. One end of the elastic element is connected to the bottom of the first sealing block, and the other end is connected to the inner bottom wall of the second air intake pipe, which is used to provide elastic support for the first sealing block.

6. A post-harvest low-oxygen, closed-atmosphere controlled atmosphere storage device for grapes according to claim 5, characterized in that, The elastic element is a spring or a metal sheet.

7. A post-harvest low-oxygen, closed-atmosphere controlled atmosphere storage device for grapes according to claim 4, characterized in that, The second sealing assembly includes a second sealing block, a connecting rod, and a piston block. The second sealing block is movably disposed inside the first exhaust pipe, the piston block is movably disposed inside the second intake pipe, one end of the connecting rod extends from the top of the second intake pipe into the second intake pipe and is fixedly connected to the piston block, and the other end extends from the top of the first exhaust pipe into the first exhaust pipe and is fixedly connected to the second sealing block.

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