A clean air main machine and a pneumatic dispensing system facilitating replacement of a filter device

Abstract

The utility model provides a clean air host computer and pneumatic dispensing system convenient to replace filter device, this clean air host computer includes the casing, install air source device and air filter device in the casing, be equipped with the air outlet port for connecting the dispenser on the casing, air source device through air filter device connects the air outlet port, be equipped with filter bin on the casing, filter bin includes the movable bin lid of open and close, air filter device detachably installs in filter bin, when needing to replace clean air host computer's air filter device, the user can open movable bin lid of filter bin, remove air filter device in filter bin and replace, close movable bin lid after replacing can continue using clean air host computer, so need not to open the casing of clean air host computer to replace air filter device, convenient operation.

Description

Technical Field

[0001] This utility model relates to the field of aseptic drug dispensing technology, and in particular to a clean air unit and pneumatic drug dispensing system that facilitates filter replacement. 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 mounted on the dispensing unit. During the dispensing process, the clean air unit blows sterile clean air through the air tube into 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.

[0004] To ensure the cleanliness and sterility of the air blown out by the clean air unit, this pneumatic dispensing system requires an air filter within the clean air unit. This filter filtration process produces clean air that meets Class 100 cleanliness requirements. The air filter needs to be replaced after prolonged use. Currently, air filters are typically located inside the clean air unit, requiring disassembly of the unit's casing for replacement, which is inconvenient. Utility Model Content

[0005] The technical problem to be solved by this invention is to provide a way to make the air filter device of a clean air unit easy to replace.

[0006] To solve the above-mentioned technical problems, this utility model provides a clean air unit that facilitates the replacement of the filter device, including a housing, an air source device and an air filter device installed inside the housing, an air outlet port for connecting a medicine dispenser on the housing, the air source device being connected to the air outlet port via the air filter device, a filter chamber on the housing, the filter chamber including an openable and closable cover, and the air filter device being detachably installed inside the filter chamber.

[0007] Furthermore, the air filtration device is a filter valve with built-in filter cotton.

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

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

[0010] Furthermore, there are two air source devices and two air filter devices, with the two air source devices connected to the air outlet ports via the two air filter devices respectively.

[0011] 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.

[0012] The present invention has the following advantages: When it is necessary to replace the air filter of the clean air unit, the user can open the movable cover of the filter compartment, remove the air filter inside the filter compartment for replacement, and close the movable cover after replacement to continue using the clean air unit. In this way, the air filter can be replaced without disassembling the casing of the clean air unit, which is convenient to operate. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a pneumatic drug dispensing system.

[0014] Figure 2 This is a schematic diagram of the pneumatic dispensing system after the movable cover of the filter compartment is opened.

[0015] Figure 3 This is a schematic diagram of an air filtration device.

[0016] 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. Filter compartment; 24. Air filtration device; 241. Air inlet; 242. Filter section; 243. Air outlet. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to specific embodiments.

[0018] Pneumatic drug dispensing system such as Figure 1 As shown, the system includes a dispensing unit 1 and a clean air unit 2 with a dispensing unit storage compartment. 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 in communication. In this embodiment, the dissolving agent mounted on the dispensing unit 11 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.

[0019] Clean air unit 2 includes a housing 21, on which a filter chamber 23 is provided. The filter chamber 23 includes an openable and closable cover, such as... Figure 2 As shown, two air filters 24 are detachably installed in the filter chamber 23 on the housing 21. Two air source devices are also installed inside the housing 21. The housing 21 has an air outlet port 22. The two air source devices are connected to the air outlet port 22 via the two air filters 24 respectively. The air outlet port 22 is connected to the air inlet 12 of the dispensing device 1 via an air pipe (not shown in the figure). The air filter 24 is specifically a filter valve with built-in filter cotton, such as... Figure 3 As shown, the air filtration device 24 includes an air inlet 241, a filter 242, and an air outlet 243 connected in sequence. The filter cotton is specifically built into the filter 242. The air inlet 241 is used to connect to the air source device, and the air outlet 243 is used to connect to the air outlet port 22. Both the air inlet 241 and the air outlet 243 are configured with a quick-plug structure, which can be inserted into the filter chamber 23 or pulled out from the filter chamber 23 for disassembly, so as to achieve detachable installation in the filter chamber 23.

[0020] 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 end opening of the dissolving device's outer casing is connected to the air inlet 12. Then, the clean air unit 2 can be turned on, causing the air source device to blow out air. This air passes through the air filter 24 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, causing the movable rubber stopper of the dissolving device on the mounting part 11 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 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 between the rear end opening of the outer casing and the rear end of the movable rubber stopper, creating a negative pressure between the rear end 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.

[0021] When it is necessary to replace the air filter 24 of the clean air unit 2, the user can open the movable cover of the filter compartment 23, remove the air filter 24 inside the filter compartment 23 for replacement, and close the movable cover after replacement to continue using the clean air unit 2. In this way, the air filter 24 can be replaced without disassembling the casing 21 of the clean air unit 2, which is convenient.

[0022] 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 unit with an easily replaceable filter, comprising a housing (21), wherein an air source device and an air filter device (24) are installed inside the housing (21), and the housing (21) is provided with an air outlet port (22) for connecting a dispensing device (1), wherein the air source device is connected to the air outlet port (22) via the air filter device, characterized in that, The housing (21) is provided with a filter chamber (23), the filter chamber (23) includes an openable and closable movable chamber cover, and the air filter device (24) is detachably installed in the filter chamber (23).

2. The clean air unit with easily replaceable filter device according to claim 1, characterized in that, The air filtration device (24) is a filter valve with built-in filter cotton.

3. The clean air unit with easy-to-replace filter device according to claim 2, characterized in that, The air filtration device includes an air inlet (241), a filter (242), and an air outlet (243) connected in sequence. The filter cotton is specifically built into the filter (242). The air inlet (241) is used to connect to the air source device, and the air outlet (243) is used to connect to the air outlet port (22).

4. The clean air unit with easy-to-replace filter device according to claim 3, characterized in that, Both the air intake (241) and the air outlet (243) are configured as quick-plug structures.

5. The clean air unit with easy-to-replace filter device according to claim 1, characterized in that, There are two air source devices and two air filter devices (24). The two air source devices are connected to the air outlet ports (22) through the two air filter devices (24).

6. A pneumatic drug dispensing system, characterized in that, The device includes a dispensing device (1), an air tube, and a clean air unit (2) as described in any one of claims 1 to 5. The dispensing device (1) includes a mounting part (11) for installing a dissolving agent and an air inlet (12) for connecting to the clean air unit (2). The air outlet (22) of the clean air unit (2) is connected to the air inlet (12) of the dispensing device (1) via an air tube.

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