Suction type preparation anti-pollution negative pressure dosing chamber

Abstract

The utility model discloses a suction type preparation anti-pollution negative pressure dosing chamber, which belongs to the field of dosing chambers and comprises a dosing chamber body, a pore plate is mounted in the dosing chamber body, an area above the pore plate is equally divided into a plurality of shunting areas, and an area below the pore plate forms a dosing area; an air purification device, a main air outlet pipe and an air suction assembly are arranged at each flow dividing area, the air suction assemblies are used for feeding air in the medicine feeding areas below the corresponding flow dividing areas into air inlets of the air purification devices, and the main air outlet pipes communicate with air exhaust openings of the air purification devices; the main air outlet pipe is arranged in the length direction of the corresponding flow dividing area, a plurality of side air outlet pipes which are evenly distributed and extend upwards in an inclined mode are formed at the upper end of the main air outlet pipe in the trend of the main air outlet pipe, and the inclination direction of the side air outlet pipes is matched with the airflow trend in the main air outlet pipe. And through the arrangement of the side air outlet pipes on the main air outlet pipe, it can be guaranteed that fresh air is roughly and evenly distributed in the flow dividing area.

Description

Technical Field

[0001] The utility model belongs to the field of drug delivery chambers, in particular to an anti-pollution negative pressure drug delivery chamber for inhalation preparations. Background Art

[0002] When conducting pharmacokinetic or bioequivalence studies on new inhaled drugs, it is necessary to administer the drug to a certain number of subjects. Due to the special administration method of inhaled preparations, some of the drug will remain in the air after administration. When the drug remaining in the air is inhaled by other subjects, cross contamination will occur, resulting in inaccurate research results.

[0003] Therefore, a negative pressure medication room is generally required to solve the above problems. However, although the existing negative pressure medication room can provide a negative pressure environment, it cannot ensure that the fresh air after purification and filtration is evenly distributed in the medication room, which leads to dead corners of air flow circulation in the medication room. After the air is discharged through the existing air circulation system, the air flow direction is not single, and the impact on the airflow in a certain area is relatively large. Therefore, the risk of cross-drug infection among experimenters cannot be avoided. Utility Model Content

[0004] The embodiment of the utility model provides an anti-pollution negative pressure drug delivery chamber for inhalation preparations to solve the problems in the prior art.

[0005] The embodiment of the utility model adopts the following technical scheme: an anti-pollution negative pressure medication chamber for inhalation preparations, comprising a medication chamber body, wherein a perforated plate is installed inside the medication chamber body, wherein the area above the perforated plate is equally divided into a plurality of diversion areas, and the area below the perforated plate is formed as a medication area; each diversion area is provided with an air purification device, a main air outlet pipe and an air suction assembly, wherein the air suction assembly is used to deliver the air in the medication area below the corresponding diversion area into the air inlet of the air purification device, wherein the main air outlet pipe is connected with the air outlet of the air purification device, wherein the main air outlet pipe is arranged along the length direction of the corresponding diversion area, wherein the upper end of the main air outlet pipe is provided with a plurality of evenly distributed and obliquely upwardly extending side air outlet pipes along its direction, and the inclination direction of the plurality of side air outlet pipes is adapted to the direction of the air flow in the main air outlet pipe.

[0006] Preferably, the air purification device is installed in the middle of the diversion area, and two groups of guide plates are fixedly installed on the top wall of the diversion area. The two groups of guide plates are symmetrically arranged on both sides of the air purification device and the width of the guide plates is adapted to the width of the diversion area. Each guide plate is arranged obliquely downward from the middle of the diversion area to the far end in the length direction of the diversion area.

[0007] Preferably, the diversion area is also provided with a plurality of longitudinal partitions, and an independent spoiler chamber is formed between each group of two adjacent longitudinal partitions, the side wall of the diversion area, the guide plate, and the orifice plate. Perforations for the main air outlet duct to pass through are formed on a plurality of longitudinal partitions, and each spoiler chamber accommodates at least one side air outlet duct.

[0008] Preferably, a plurality of spoilers are formed at the lower end of each guide plate, each spoiler corresponds to a side air outlet duct, and the lower end of the spoiler is bent toward the direction close to the corresponding side air outlet duct to form a curved wall.

[0009] Preferably, the inclination angle of the side air outlet duct away from the air purification device is smaller than the angle of the side air outlet duct close to the air purification device.

[0010] Preferably, the suction assembly includes at least two suction pipes and are respectively installed in several ventilation ducts reserved on the wall of the dosing room body. An air inlet grille is installed at the lower end of each ventilation duct. A suction fan is installed at one end of each suction pipe and is located at the air inlet grille. The other end of each suction pipe passes through a perforated plate and is connected to the air inlet of the air purification device.

[0011] Preferably, two groups of filter layers and at least one group of guide fans are arranged inside the air purification device, and the two groups of filter layers are respectively installed at the air inlet and the air outlet of the air purification device, and the guide fan is used to guide the airflow at the air inlet to the air outlet.

[0012] Preferably, a plurality of ventilation ducts are evenly arranged on two opposite walls of the medication area along the width direction thereof according to the space size of the medication area below the diversion area corresponding to the diversion area.

[0013] At least one of the above technical solutions adopted in the embodiment of the utility model can achieve the following beneficial effects:

[0014] The utility model can ensure that the fresh air is roughly evenly distributed in the diversion area by arranging multiple side air outlet ducts on the main air outlet duct. In addition, considering that the exhaust airflow of the side air outlet duct far away from the air purification device will be relatively weak, which leads to the situation that the airflow distribution in the diversion area is still concentrated in the middle area. For this reason, several side exhaust ducts are arranged at an angle so that the gas exhausted from the several side exhaust pipes can be roughly distributed to the far end and surroundings of the diversion area, thereby improving the uniformity of the fresh air in the diversion area. In combination with the circulation of gas in the medication chamber body and the orifice plate exhaust method, the fresh air can be pressed down and evenly sink into the medication area to achieve a single flow direction of the airflow. At the same time, the overall sinking of the fresh air can also accelerate the air in the medication area to enter the suction assembly, thereby avoiding the situation that the fresh air distribution in the medication area is uneven or the air is not circulated in a certain area, which may cause cross infection between medication personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 It is a schematic diagram of the local three-dimensional structure of the utility model Figure 1 ;

[0018] Figure 3 It is a partial side view of the utility model;

[0019] Figure 4 It is a schematic diagram of the local three-dimensional structure of the utility model Figure 2 ;

[0020] Figure 5 It is a schematic diagram of the local three-dimensional structure of the utility model Figure 3 ;

[0021] Figure 6 for Figure 5 The enlarged view of point A in the middle;

[0022] Figure 7 It is a partial three-dimensional structural schematic diagram of the air suction component, the main air outlet pipe and the air purification device of the utility model;

[0023] Figure 8 It is a partial three-dimensional structural schematic diagram of the air purification device of the utility model;

[0024] Fig. 9 It is a partial side view of the second embodiment of the utility model;

[0025] Reference numerals

[0026] 1-dosing room body; 11-ventilation duct; 12-air inlet grille; 2-perforated plate; 3-diversion area; 31-air purification device; 311-filter layer; 312-guide fan; 32-main air outlet pipe; 33-suction assembly; 331-suction pipe; 332-suction fan; 34-side air outlet pipe; 35-guide plate; 36-longitudinal partition; 361-perforation; 37-spoiler chamber; 38-spoiler; 381-curved wall; 4-dosing area. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in combination with the specific embodiments of the utility model and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] The technical solutions provided by various embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0029] Reference Figures 1 to 8 As shown, the embodiment of the utility model provides an anti-pollution negative pressure dosing chamber for inhalation preparations, comprising a dosing chamber body 1, wherein a perforated plate 2 is installed inside the dosing chamber body 1, and the area above the perforated plate 2 is equally divided into a plurality of diversion areas 3 (such as Figure 2 As shown, two diversion areas 3 are shown, and the area below the orifice plate 2 is formed as a dosing area 4;

[0030] Each diversion area 3 is provided with an air purification device 31, a main air outlet pipe 32 and an air suction component 33. The air suction component 33 is used to deliver the air in the dosing area 4 below the corresponding diversion area 3 into the air inlet of the air purification device 31. The main air outlet pipe 32 is connected to the exhaust port of the air purification device 31. The main air outlet pipe 32 is arranged along the length direction of the corresponding diversion area 3. The upper end of the main air outlet pipe 32 is formed with a number of evenly distributed and inclined upwardly extending side air outlet pipes 34 along its direction. The inclination direction of the side air outlet pipes 34 is adapted to the air flow direction in the main air outlet pipe 32.

[0031] In this embodiment, the air in the dosing area 4 (the gas diffused during the dosing process and the gas containing the drug components) can be sucked into or sent into the air purification device 31 through the suction component 33. After the air is filtered by the air purification device 31, the fresh air is discharged into the main air outlet 32 ​​through the exhaust port. Since the main air outlet 32 ​​is provided with a plurality of inclined side air outlet ducts 34, the fresh air can be discharged from the plurality of side air outlet ducts 34 and roughly evenly distributed in the entire diversion area 3. As the fresh air continuously flows into the diversion area 3, the fresh air can be squeezed to sink and cooperate with the suction component 33 to attract the air in the dosing area 4, thereby Fresh air can be allowed to sink into the dosing area 4 through the holes on the orifice plate 2 (the orifice plate 2 is a prior art, and mainly utilizes the evenly arranged holes on the orifice plate 2 to allow the gas in one area to roughly present the original distribution state and evenly enter another area, thereby completing the overall air purification cycle in the dosing chamber body 1; it should be noted that, under the action of air pressure, the air supplied by the orifice plate 2 is ejected toward the dosing area 4 along the densely distributed small holes, flows downward evenly, and the airflow diffusion and mixing are better. The temperature field and velocity field of the entire dosing area 4 and the upper diversion area 3 are relatively stable, thereby avoiding the defect that the air cannot be effectively circulated due to the excessive temperature difference between the upper and lower layers of the air.

[0032] To sum up, the arrangement of multiple side air outlet ducts 34 on the main air outlet duct 32 can ensure that the fresh air is roughly evenly distributed in the diversion area 3. In addition, considering that the exhaust airflow of the side air outlet duct 34 far away from the air purification device 31 will be relatively weak, which leads to the situation that the airflow distribution in the diversion area 3 is still concentrated in the middle area. For this reason, by arranging several side exhaust pipes at an angle, the gas discharged from several side exhaust pipes can be roughly distributed to the far end and surroundings of the diversion area 3, so as to improve the uniformity of fresh air in the diversion area 3, and cooperate with the circulation of gas in the dosing chamber body 1 and the exhaust method of the orifice plate 2, so that the fresh air can be pressed down and evenly sink into the dosing area 4, realizing a single flow direction of the airflow; at the same time, the overall sinking of the fresh air can also accelerate the air in the dosing area 4 to enter the suction component 33, avoiding the uneven distribution of fresh air in the dosing area 4 or the lack of air circulation in a certain area, which may cause cross-infection between dosing personnel.

[0033] Specifically, the inclination angle of the side air outlet duct 34 away from the air purification device 31 is smaller than the angle of the side air outlet duct 34 close to the air purification device 31. The gradual change of the inclination angle of the side air outlet duct 34 is not clearly shown in the figure. The principle is mainly that the smaller the inclination angle of the side air outlet duct 34, the smoother the outflow of air will be, which further improves the diffusion of gas to the far end of the diversion area 3 and improves the uniformity of fresh air distribution in the overall area.

[0034] It should be noted that the purpose of setting up multiple diversion areas 3 is to ensure effective circulation of air in the entire dosing area 4, to avoid the indoor space being too large, and a group of diversion areas 3 or suction components 33 cannot ensure normal circulation of air in the entire dosing area 4; better air purification and circulation can also be achieved by increasing the power of devices such as air purification devices 31 or suction components 33.

[0035] In some practical applications:

[0036] like Figures 3 to 5 As shown, the air purification device 31 is installed in the middle position of the diversion area 3, and two groups of guide plates 35 are fixedly installed on the top wall of the diversion area 3. The two groups of guide plates 35 are symmetrically arranged on both sides of the air purification device 31 and the width of the guide plates 35 is adapted to the width of the diversion area 3. Each guide plate 35 is arranged obliquely downward from the middle of the diversion area 3 to the far end of the length direction of the diversion area 3. By setting the inclined guide plates 35, the airflow discharged from the middle of the diversion area 3 can be accelerated to flow to the far end of the diversion area 3, thereby further improving the uniformity of the distribution of fresh air.

[0037] Specifically, two groups of filter layers 311 and at least one group of guide fans 312 are arranged inside the air purification device 31. The two groups of filter layers 311 are respectively installed at the air inlet and the air outlet of the air purification device 31. The guide fan 312 is used to guide the airflow at the air inlet to the air outlet. The filter layer 311 can adopt a HEPA air filter (HEPA is a high-efficiency air filter, which can remove particles with a diameter of more than 0.3 microns with an efficiency of more than 99.97%, and can effectively filter dust, pollen, bacteria, viruses and some tiny particles in the air) or other high-efficiency air filters.

[0038] Specifically, the suction assembly 33 includes at least two suction pipes 331 and are respectively installed in several ventilation ducts 11 reserved on the wall of the dosing room body 1. An air inlet grille 12 is installed at the lower end of each ventilation duct 11. A suction fan 332 is installed at one end of each suction pipe 331 and is located at the air inlet grille 12. The other end of each suction pipe 331 passes through the orifice plate 2 and is connected to the air inlet of the air purification device 31.

[0039] A number of ventilation ducts 11 are evenly arranged on two opposite walls of the dosing area 4 along its width direction according to the space size of the dosing area 4 below the diversion area 3. The arrangement of such ventilation ducts 11 and suction components 33 is mainly based on the consideration that the construction standards of common houses or buildings have a certain length-to-width ratio. Corresponding suction components 33 are provided in terms of width to achieve effective suction efficiency. In actual application, it is necessary to test the suction radius of the suction components 33 to ensure that the suction radius between every two adjacent suction components 33 has an overlapping part, thereby ensuring the effective circulation of the airflow in the entire dosing chamber body 1.

[0040] Embodiment 1:

[0041] like Figures 3 to 5 As shown, a plurality of longitudinal partitions 36 are further arranged in the diversion area 3, and an independent spoiler chamber 37 is formed between each group of two adjacent longitudinal partitions 36, the side wall of the diversion area 3, the guide plate 35, and the orifice plate 2. A plurality of longitudinal partitions 36 are provided with through holes 361 for the main air outlet duct 32 to pass through, and each spoiler chamber 37 accommodates at least one side air outlet duct 34.

[0042] In this embodiment, on the basis of the above, when the air flow rate discharged from each side exhaust pipe is roughly the same, in order to prevent the gas from being too fluid in the entire diversion area 3 after being ejected from the side exhaust pipe and being unable to flow into the dosing area 4 in a relatively stable or uniform state, a plurality of independent turbulence chambers 37 are provided. The gas discharged from each side exhaust pipe is concentrated in the turbulence chamber 37 in a small area for flow and mixing, and sinks along the orifice plate 2 below, and there will be no large-scale airflow fluctuations that affect the uniformity of air distribution in the overall diversion area 3.

[0043] Embodiment 2:

[0044] like Fig. 9 As shown, in order to achieve the same effect as in Example 1, a plurality of spoilers 38 may be formed at the lower end of each guide plate 35, each spoiler 38 corresponds to a side air outlet duct 34, and the lower end of the spoiler 38 is bent toward the direction close to the corresponding side air outlet duct 34 to form a curved wall 381. The gas discharged through the side air outlet duct 34 directly impacts the spoiler 38, and the gas follows the curved wall 381 for reflux, thereby achieving the purpose of spoiler flow in a small range or small area. Moreover, compared with the embodiment, this implementation method is easier to install or arrange pipelines.

[0045] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. An anti-pollution negative pressure drug delivery chamber for inhalation preparations, characterized in that: The invention comprises a dosing chamber body (1), wherein a perforated plate (2) is installed inside the dosing chamber body (1), the area above the perforated plate (2) is equally divided into a plurality of flow distribution areas (3), and the area below the perforated plate (2) is formed as a dosing area (4); Each diversion area (3) is provided with an air purification device (31), a main air outlet pipe (32) and an air suction component (33). The air suction component (33) is used to send the air in the medication area (4) below the corresponding diversion area (3) into the air inlet of the air purification device (31). The main air outlet pipe (32) is connected with the air outlet of the air purification device (31). The main air outlet pipe (32) is arranged along the length direction of the corresponding diversion area (3). The upper end of the main air outlet pipe (32) is formed with a plurality of evenly distributed and inclined upwardly extending side air outlet pipes (34) along its direction. The inclination direction of the plurality of side air outlet pipes (34) is adapted to the direction of the air flow in the main air outlet pipe (32).

2. The anti-pollution negative pressure drug delivery chamber for inhalation preparations according to claim 1, characterized in that: The air purification device (31) is installed in the middle of the diversion area (3), and two groups of guide plates (35) are fixedly installed on the top wall of the diversion area (3). The two groups of guide plates (35) are symmetrically arranged on both sides of the air purification device (31), and the width of the guide plates (35) is adapted to the width of the diversion area (3). Each guide plate (35) is arranged obliquely downward from the middle of the diversion area (3) to the far end of the diversion area (3) in the length direction.

3. The anti-pollution negative pressure drug delivery chamber for inhalation preparations according to claim 2, characterized in that: The flow diversion area (3) is further provided with a plurality of longitudinal partitions (36), and an independent flow disturbance chamber (37) is formed between each group of two adjacent longitudinal partitions (36), the side wall of the flow diversion area (3), the guide plate (35), and the orifice plate (2). A plurality of longitudinal partitions (36) are provided with through holes (361) for the main air outlet pipe (32) to pass through, and each flow disturbance chamber (37) contains at least one side air outlet pipe (34).

4. The anti-pollution negative pressure drug delivery chamber for inhalation preparations according to claim 2, characterized in that: A plurality of spoilers (38) are formed at the lower end of each guide plate (35), each spoiler (38) corresponds to a side air outlet pipe (34), and the lower end of the spoiler (38) is bent in a direction close to the corresponding side air outlet pipe (34) to form a curved wall (381).

5. The anti-pollution negative pressure drug delivery chamber for inhalation preparations according to claim 1, 3 or 4, characterized in that: The inclination angle of the side air outlet pipe (34) far from the air purification device (31) is smaller than the angle of the side air outlet pipe (34) close to the air purification device (31).

6. The anti-pollution negative pressure drug delivery chamber for inhalation preparations according to claim 1, characterized in that: The air suction assembly (33) comprises at least two air suction pipes (331) which are respectively installed in a plurality of ventilation ducts (11) reserved on the wall of the medication chamber body (1); an air inlet grille (12) is installed at the lower end of each ventilation duct (11); a suction fan (332) is installed at one end of each air suction pipe (331) and is located at the air inlet grille (12); and the other end of each air suction pipe (331) passes through the orifice plate (2) and is connected to the air inlet of the air purification device (31).

7. The anti-pollution negative pressure drug delivery chamber for inhalation preparations according to claim 1, characterized in that: Two groups of filter layers (311) and at least one group of guide fans (312) are arranged inside the air purification device (31); the two groups of filter layers (311) are respectively installed at the air inlet and the air outlet of the air purification device (31); the guide fan (312) is used to guide the airflow at the air inlet to the air outlet.

8. The anti-pollution negative pressure drug delivery chamber for inhalation preparations according to claim 6, characterized in that: A plurality of ventilation ducts (11) are evenly arranged on two opposite walls of the medication area (4) along its width direction according to the space size of the medication area (4) below the diversion area (3) corresponding to the diversion area (3).

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