A clean air unit with a noise-reducing fan and a pneumatic drug dispensing system

Abstract

This invention provides a clean air unit with a noise-reducing fan and a pneumatic dispensing system. The system includes a housing, within which are installed a first air source device, a second air source device, a first air filter, and a second air filter. The housing has an air outlet for connecting a dispensing device. The first air source device is connected to the air outlet via the first air filter, and the second air source device is also connected via the second air filter. A noise-reducing fan is installed at the bottom of the housing, with its air inlet extending from the bottom of the housing to the outside, and its air outlet facing the first and second air source devices. During operation, the noise-reducing fan draws in air from the bottom of the housing and blows it upwards to the first and second air source devices for cooling. Since hot air naturally rises and cold air naturally sinks, the design of the noise-reducing fan—intake from the bottom of the housing and exhaust upwards—aligns with the natural convection direction, reducing the fan's resistance to airflow and thus lowering airflow noise.

Description

Technical Field

[0001] This utility model relates to the field of aseptic drug dispensing technology, and in particular to a clean air unit with a noise-reducing fan and a pneumatic drug dispensing system. Background Technology

[0002] Injection drug preparation typically uses a manually operated dissolving apparatus. Commercially available dissolving apparatuses consist of an outer casing and a movable rubber stopper located inside the casing. A needle is attached to the front of the outer casing, and an opening is located at the rear. A mandrel extends from the opening to the outside of the outer casing from the rear of the movable rubber stopper. During drug preparation, the operator first manually operates the mandrel to move the movable rubber stopper forward within the outer casing, expelling air between the front of the movable rubber stopper and the front of the outer casing. Then, the mandrel is operated to move the movable rubber stopper backward within the outer casing, causing the outer casing to draw the drug solution through the needle. After the movable rubber stopper moves forward to expel air between its front and the front of the outer casing, the inner wall of the outer casing, located behind the movable rubber stopper, is connected to the outside air through the rear opening. This allows airborne bacteria to easily enter through the rear opening and adhere to the inner wall of the outer casing. Then, the movable rubber stopper moves backward to reset, causing the outer casing to draw the drug solution back into the outer casing. This brings the inner wall of the outer casing, which was previously connected to the outside air, into contact with the drug solution, resulting in contamination of the drug solution by bacteria attached to the inner wall of the outer casing.

[0003] A pneumatic drug dispensing system includes a clean air unit and a dispensing unit for mounting a drug dissolving apparatus. The clean air unit is connected via an air tube to the rear opening of the outer casing of the drug dissolving apparatus and the outer periphery of the outer casing. During the dispensing process, the clean air unit blows sterile clean air through the air tube to the rear opening of the outer casing of the drug dissolving apparatus, causing the movable rubber stopper of the drug dissolving apparatus to move forward under air pressure, expelling the air between the front end of the movable rubber stopper and the front end of the outer casing. At this time, bacteria in the air cannot enter through the rear opening of the outer casing and adhere to the inner wall of the outer casing. After the air between the front end of the movable rubber stopper and the front end of the outer casing is completely expelled, the clean air unit draws in air in the opposite direction through the air tube between the rear opening of the outer casing and the rear end of the movable rubber stopper, creating a negative pressure between the rear opening of the outer casing and the rear end of the movable rubber stopper. Under the action of the negative pressure, the movable rubber stopper moves backward and resets, allowing the outer casing to draw in the drug solution through the needle. Since there are no bacteria attached to the inner wall of the outer casing, the drug solution drawn into the outer casing will not be contaminated by bacteria. At the same time, the clean air unit also blows sterile clean air through the air duct to the outer shell of the dissolving agent on the dispensing device, blowing away bacteria on the outer shell and keeping the inside and outside of the dissolving agent's outer shell clean.

[0004] To simultaneously blow clean air into the rear opening of the dissolving apparatus's outer casing and onto its periphery, this clean air unit requires two air supply devices and two air filters. The first air supply device, through the first air filter, blows sterile clean air into the rear opening of the dissolving apparatus's outer casing, while the second air supply device, through the second air filter, blows sterile clean air into the periphery of the dissolving apparatus's outer casing. This results in two air supply devices within the clean air unit. During operation, these two devices generate heat, which is currently dissipated by cooling fans mounted on the side wall of the clean air unit. However, these cooling fans are quite noisy during operation. Utility Model Content

[0005] The technical problem this invention aims to solve is how to reduce the noise of the cooling fan in a clean air unit.

[0006] To solve the above-mentioned technical problems, this utility model provides a clean air unit with a noise-reducing fan, including a housing. A first air source device, a second air source device, a first air filter device, and a second air filter device are installed inside the housing. The housing has an air outlet port for connecting a dispensing device. The first air source device is connected to the air outlet port via the first air filter device, and the second air source device is connected to the air outlet port via the second air filter device. A noise-reducing fan is installed at the bottom of the housing. The air inlet of the noise-reducing fan extends from the bottom of the housing to the outside, and the air outlet faces the first and second air source devices.

[0007] Furthermore, the first air filtration device and the second air filtration device are filter valves with built-in polytetrafluoroethylene filter membranes.

[0008] Furthermore, the first air filtration device includes an air inlet, a filter, and an air outlet connected in sequence. The polytetrafluoroethylene filter membrane is specifically built into the filter. The air inlet is used to connect to the first air source device, and the air outlet is used to connect to the air outlet port.

[0009] Furthermore, both the air intake and the air outlet are configured with a quick-plug structure.

[0010] Furthermore, the second air filter has the same structure as the first air filter.

[0011] Furthermore, there are two noise-reducing fans, with the air outlet of the first noise-reducing fan facing the first air source device and the air outlet of the second noise-reducing fan facing the second air source device.

[0012] This utility model also provides a pneumatic drug dispensing system, including a drug dispensing device, an air pipe, and the aforementioned clean air unit. The drug dispensing device includes a mounting part for installing a dissolving agent and an air inlet for connecting to the clean air unit. The air outlet of the clean air unit is connected to the air inlet of the drug dispensing device via the air pipe.

[0013] The present invention has the following beneficial effects: the air inlet of the noise-reducing fan extends from the bottom of the casing to the outside, and the air outlet faces the first air source device and the second air source device. In this way, when the noise-reducing fan is running, it draws in air from the bottom of the casing and blows it upward to the first air source device and the second air source device for heat dissipation. Since hot air rises naturally and cold air sinks naturally, the design of the noise-reducing fan to draw in air from the bottom of the casing and exhaust air upward is consistent with the natural convection direction, reducing the resistance of the noise-reducing fan against the airflow, thereby reducing the noise of the airflow. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a pneumatic drug dispensing system.

[0015] Figure 2 This is a schematic diagram of the clean air unit after it has been disassembled.

[0016] Figure 3 This is a schematic diagram of the first air filtration device.

[0017] Explanation of reference numerals in the attached drawings: 1. Dosing device; 2. Clean air unit; 11. Mounting section; 12. Air inlet; 21. Housing; 22. Air outlet; 23. First air source device; 24. Second air source device; 25. First air filter; 26. Second air filter; 27. Filter compartment; 28. Silencer; 29. ​​Noise-reducing fan; 211. Top shell; 212. Bottom shell; 213. Frame; 251. Air inlet; 252. Filter section; 253. Air outlet. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to specific embodiments.

[0019] Pneumatic drug dispensing system such as Figure 1 As shown, the device includes a dispensing unit 1 and a clean air unit 2 with a noise-reducing fan. The dispensing unit 1 includes a mounting part 11 for mounting a dissolving agent and an air inlet end 12 for connecting to the clean air unit 2. The mounting part 11 and the air inlet end 12 are connected. In this embodiment, the dissolving agent mounted on the dispensing unit 1 includes an outer casing and a movable rubber stopper disposed inside the outer casing. A needle is mounted on the front end of the outer casing, and an opening is opened at the rear end. The movable rubber stopper can move back and forth inside the outer casing.

[0020] The clean air unit 2 includes a housing 21, on which an air outlet 22 for connecting to the dispensing device 1 is provided. Inside the housing 21 are installed a first air source device 23, a second air source device 24, a first air filter device 25, and a second air filter device 26, as detailed below. Figure 2 As shown, the housing 21 includes a detachable top shell 211 and a bottom shell 212. A frame 213 is detachably installed inside the top shell 211. A first air source device 23 is specifically installed inside the bottom shell 212, and a second air source device 24 is specifically installed on the frame 213. A filter chamber 27 is provided on the top shell 211. The filter chamber 27 includes an openable and closable cover. A first air filter device 25 and a second air filter device 26 are specifically installed inside the filter chamber 27. An air outlet 22 is specifically located on the top shell 211. The first air source device 23 is connected to the air outlet 22 via the first air filter device 25, and the second air source device 24 is connected to the air outlet 22 via the second air filter device 26. The air outlet 22 is connected to the air inlet 12 of the dispensing device 1 via an air pipe (not shown in the figure). A silencer 28 is also installed on the frame 213. After the top shell 211, bottom shell 212 and frame 213 are assembled together, the frame 213 covers the first air source device 23, and the silencer 28 eliminates the noise generated by the first air source device 23.

[0021] Two noise-reducing fans 29 are installed at the bottom of the bottom shell 212 of the housing 21. The air inlets of these two noise-reducing fans 29 extend from the bottom of the housing 21 to the outside, but their air outlets face the first air source device 23 and the second air source device 24, respectively. Specifically, the air outlet of the first noise-reducing fan 29 faces the first air source device 23, and the air outlet of the second noise-reducing fan 29 faces the second air source device 24. Ventilation holes 20 are opened on the side wall of the top shell 211 of the housing 21. After the two noise-reducing fans 29 blow air to the first air source device 23 and the second air source device 24 for heat dissipation, the hot air is blown out through the ventilation holes 20 to the outside of the clean air unit 2.

[0022] The first air filtration device 25 and the second air filtration device 26 are specifically filter valves with built-in polytetrafluoroethylene filter membranes, such as... Figure 3 As shown, the first air filtration device 25 includes an air inlet 251, a filter 252, and an air outlet 253 connected in sequence. A polytetrafluoroethylene (PTFE) filter membrane is specifically built into the filter 252. The air inlet 251 is used to connect to the first air source device 23, and the air outlet 253 is used to connect to the air outlet port 22. Both the air inlet 251 and the air outlet 253 are designed with a quick-plug structure, allowing them to be inserted into and installed in the filter chamber 27, or pulled out and removed from the filter chamber 27, thus achieving detachable installation within the filter chamber 27. The second air filtration device 26 has the same structure as the first air filtration device 25 and will not be described further here.

[0023] When using the dispensing device 1, first install the dissolving device on the mounting part 11 of the dispensing device 1, so that the rear opening of the outer jacket of the dissolving device is connected to the air inlet 12. Then, the clean air unit 2 can be started, causing the first air source device 23 and the second air source device 24 to blow out air respectively. The air blown out by the first air source device 23 passes through the first air filter device 25 and is output as clean air from the air outlet 22. This clean air is transmitted from the air inlet 12 of the dispensing device 1 to the mounting part 11. Under the action of air pressure, the movable rubber stopper of the dissolving device on the mounting part 11 moves forward, expelling the air between the front end of the movable rubber stopper and the front end of the outer casing. At this time, bacteria in the air cannot enter from the rear end opening of the outer casing and adhere to the inner wall of the outer casing. After the air between the front end of the movable rubber stopper and the front end of the outer casing is expelled, the clean air unit 2 draws in air in the opposite direction through the air tube and the dispensing device 1 between the rear end opening of the outer casing and the rear end of the movable rubber stopper, so that a negative pressure is formed between the rear end opening of the outer casing and the rear end of the movable rubber stopper. Under the action of negative pressure, the movable rubber stopper moves backward and resets, allowing the outer casing to draw in the drug solution through the needle. Since there are no bacteria attached to the inner wall of the outer casing, the drug solution drawn into the outer casing will not be contaminated by bacteria. During this process, the second air source device 24 blows out air at all times. The air blown out by the second air source device 24 passes through the second air filter device 26 and is then output as clean air from the air outlet 22. This clean air is delivered from the air inlet 12 of the dissolving device 1 to the outer shell of the dissolving device on the mounting part 11, blowing away bacteria on the outer shell and keeping the inside and outside of the dissolving device clean.

[0024] After the clean air unit 2 is started, the two noise-reducing fans 29 run synchronously. They draw in air from the bottom of the bottom shell 212 of the housing 21 and blow it upward to the first air source device 23 and the second air source device 24 for heat dissipation. Since hot air rises naturally and cold air sinks naturally, the design of the noise-reducing fan 29, which draws in air from the bottom of the bottom shell 212 of the housing 21 and exhausts air upward, is consistent with the natural convection direction, reducing the resistance of the noise-reducing fan 29 to the airflow and thus reducing the anti-flow noise.

[0025] The above description is merely an embodiment of the present invention and does not limit the scope of patent protection. Any non-substantial changes or substitutions made by those skilled in the art based on the present invention will still fall within the scope of patent protection.

Claims

1. A clean air main unit having a noise reducing fan, characterized by, It includes a housing (21), inside which a first air source device (23), a second air source device (24), a first air filtration device (25) and a second air filtration device (26) are installed. An air outlet port (22) for connecting to a medicine dispenser (1) is provided on the housing (21). The first air source device (23) is connected to the air outlet port (22) via the first air filtration device (25), and the second air source device (24) is connected to the air outlet port (22) via the second air filtration device (26). A noise reduction fan (29) is installed at the bottom of the housing (21). The air inlet of the noise reduction fan (29) penetrates from the bottom of the housing (21) to the outside, and the air outlet faces the first air source device (23) and the second air source device (24).

2. The clean air unit with a noise reducing fan as set forth in claim 1, wherein, The first air filtration device (25) and the second air filtration device (26) are filter valves with a polytetrafluoroethylene filter membrane built-in.

3. The clean air unit with a noise reducing fan of claim 2, wherein, The first air filtration device (25) includes an air inlet part (251), a filtration part (252) and an air outlet part (253) which are connected in sequence. The polytetrafluoroethylene filter membrane is specifically built-in the filtration part (252). The air inlet part (251) is used to connect the first air source device (23), and the air outlet part (253) is used to connect the air outlet port (22).

4. The clean air unit with a noise reducing fan as set forth in claim 3, wherein, Both the air inlet part (251) and the air outlet part (253) are set as quick plug-in structures.

5. The clean air unit with a noise reducing fan as set forth in claim 3, wherein, The second air filtration device (26) has the same structure as the first air filtration device (25).

6. The clean air unit with a noise reducing fan of claim 1, wherein, There are two noise reduction fans (29). The air outlet of the first noise reduction fan (29) faces the first air source device (23), and the air outlet of the second noise reduction fan (29) faces the second air source device (24).

7. A pneumatic dispensing system characterized by, It includes a medicine dispenser (1), an air tube and a clean air main unit (2) according to any one of claims 1 to 6. The medicine dispenser (1) includes an installation part (11) for installing a medicine dissolver and an air inlet end (12) for connecting to the clean air main unit (2). The air outlet port (22) of the clean air main unit (2) is connected to the air inlet end (12) of the medicine dispenser (1) via an air tube.

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