High-efficiency air supply and exhaust device of artificial nuclear medicine split charging hot chamber cabinet

Abstract

The utility model relates to a high-efficiency air supply and exhaust device of an artificial nuclear medicine split charging hot chamber cabinet. The air supply and exhaust efficiency is improved. Comprising an air supply and exhaust top chamber and a shielding sub-packaging middle heat chamber shielding in-out lower heat chamber which is respectively provided with a sealing protection front door, a static pressure air supply box and an exhaust fan box which are arranged in the air supply and exhaust top chamber in parallel are respectively downwards communicated with an air supply port close to the sealing protection front door at the upper part in the shielding sub-packaging middle heat chamber shielding in-out lower heat chamber through a non-return air supply pipeline; and an exhaust outlet which is far away from the sealing protection front door and is provided with an activated carbon filter at the lower part in the shielding split charging middle hot chamber and the shielding in-out lower hot chamber is downwards communicated through a non-return exhaust pipeline. The device has the advantages that the quality of exhausted air is guaranteed, air in the hot chamber is prevented from overflowing when the door is opened, and nuclide pollution of the air in the hot chamber can be kept at a reasonable low level through adsorption of internal circulating airflow.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of artificial nuclear medicine split charging hot chamber cabinet, especially to a kind of high-efficiency air supply and exhaust device of artificial nuclear medicine split charging hot chamber cabinet. BACKGROUND

[0002] The application discloses a radioactive medicine sub-packaging hot chamber, which comprises an outer box body and an inner container in the outer box body.Further, the medicine-in door and the medicine-out door each comprise a door body and a door frame, the door frame is fixedly connected with the inner container, the door frame is hinged with the door body through a hinge, and the door frame is fixedly connected with the air-tight sealing ring corresponding to the door body. However, since forced air supply and forced air exhaust are simultaneously performed in the same closed hot chamber space, it is inevitable to form air phase circulation in the closed hot chamber. The artificial nuclear medicine not completely exhausted by the air phase circulation will inevitably pollute the hot chamber, which is obviously a problem to be solved in the field. SUMMARY

[0003] The present application aims to overcome the above-mentioned defects of the prior art, and provide a high-efficiency air supply and exhaust device for a hot chamber cabinet for artificial nuclear medicine.

[0004] The utility model discloses a high -efficient send exhaust device of hot chamber cabinet of manual nuclear medicine sub -packaging, is vertical cabinet including send exhaust top room and respectively set up sealed protection front door's shielding sub -packaging middle hot chamber and shielding in and out lower hot chamber, its special feature lies in: the static pressure air supply box and exhaust fan box that are arranged in parallel in the send exhaust top room are connected with the air supply port of the sealed protection front door in the upper part of shielding sub -packaging middle hot chamber and shielding in and out lower hot chamber through the non -return air supply pipeline respectively and are connected with the exhaust port of the sealed protection front door in the lower part of shielding sub -packaging middle hot chamber and shielding in and out lower hot chamber through the non -return exhaust pipeline, and the output wind pressure of the air supply port in the same hot chamber is lower than the suction internal pressure of the exhaust port in the normal door closed working state, thereby forming the negative pressure working state in the hot chamber and avoiding the air leakage in the hot chamber. When the air pressure of the air supply port is lower than the atmospheric pressure of the equipment location, when any one sealed protection front door is opened, the atmospheric pressure of the hot chamber where the sealed protection front door is located will increase due to the inflow of the atmospheric air, and the atmospheric pressure of the hot chamber where the other sealed protection front door is not opened will still be in the obviously low pressure state under the normal condition, thereby the air supply pipeline connected with the opened hot chamber is automatically closed, and the opened protection front door is used to intake air, thereby preventing the opened hot chamber from overflowing the contaminated air. More particularly, in the door closed state, all the one-way valves are self-closed, thereby preventing the air in the hot chamber from overflowing. More particularly, in the normal door closed state, the air is sent downward from the high-position air supply port near the sealed protection front door, and the air is exhausted outward from the low-position exhaust port far from the sealed protection front door. At the same time when the air is exhausted outward from the low-position exhaust port, the upward air flow is formed by the aid of the downward air flow from the high-position air supply port, and the circulating air flow is finally formed, thereby the activated carbon filter arranged on the low-position exhaust port can filter and adsorb the artificial nuclear pollutants in the air flow passing through it, can further adsorb the artificial nuclear pollutants in the circulating air flow passing in front of it, and can maintain the artificial nuclear pollution level of the air in the hot chamber to a reasonable low level by the continuous adsorption of the circulating air flow, thereby preventing the artificial nuclear pollutants from overflowing. Therefore, the air quality of the exhausted air is guaranteed, the air in the hot chamber is prevented from overflowing when the door is opened, and the nuclear pollutants in the air of the hot chamber are maintained at a reasonable low level by the adsorption of the circulating air flow.

[0005] As optimization, the air outlet is arranged at the lower part of the inner rear wall of the shielded sub-packaging hot chamber and shielded access to the lower hot chamber, opposite to the protective front door, so that opening the protective front door will be easier to form an inward air flow from the open door, because the open door is directly opposite to the air outlet, the air flow path is short and straight, and it is easier to form a strong air flow to avoid air overflow in the hot chamber. The activated carbon filter is sealingly connected to the air outlet, which is easy to seal and maintain. The cabinet is a lead protection plate with an inner wall and an outer wall shell, so that the toxic lead protection plate is not exposed inside or outside.

[0006] As optimization, the activated carbon filter is a front facade air inlet, a rear facade air outlet, and a transverse activated carbon filter body arranged in the middle. In this way, the transverse introduction and export of the filtered air flow can ensure the inhalation intensity while facilitating the purification of the air at the bottom of the hot chamber and the discharge of fresh air compared to the air flow path in other directions. Specifically, the activated carbon filter is provided with an air inlet grille or net in the front facade, an air outlet grille or net in the rear facade, and a transverse activated carbon filter body in the middle.

[0007] As optimization, the activated carbon filter is vertically spaced from the inner bottom plate of the lower hot chamber, which is beneficial to reduce the transverse air flow resistance, especially the circulating air flow resistance; the front and rear of the transverse activated carbon filter body are respectively provided with air inlet and outlet spacing grilles or nets, so that all passing air flows must pass through the transverse activated carbon filter body, and the filtering performance is reliable.

[0008] As optimization, the front facade of the air inlet is a forward and downward inclined front lower inclined surface type, which can strengthen the suction and filtration performance of the circulating air flow. The cross section of the activated carbon filter connected to the air outlet at the rear end is a right-angled trapezoid with the inclined side facing the lower front, which is beneficial to increase the suction and filtration carrying capacity of the filtration path.

[0009] As optimization, the sealed protective front door is an inner and outer sealed protective front door, the outer sealed protective front door is provided with a lead glass transparent door plate, and the inner sealed protective front door is provided with a light transparent door plate, so that the light transparent door plate of the inner sealed protective front door can be temporarily closed during the pause process in the normal door opening operation process, thereby minimizing the true opening time and realizing further reduction of the risk of heat pollution air overflow; the inner and outer sealed protective front door is a lead glass door plate hinged to one side of the outer frame of the hot chamber door, and the lead glass inner convex surface inside the lead glass door plate is embedded with the inner periphery of the outer door frame, and the outer periphery of the lead glass inner convex surface is provided with a silica gel sealing ring in sealing cooperation with the inner periphery of the outer door frame, so that the weight of the outer door is reduced, the radiation shielding ability is not reduced, and the sealing performance is guaranteed. The inner door frame is arranged on the inner side of the outer door frame, and the transparent organic glass door plate is hinged to the inner periphery of the outer door frame, and the outer periphery of the transparent organic glass door plate is provided with a ring-shaped pressure sealing air bag in sealing cooperation with the inner periphery of the inner door frame. In this way, the inner door can be conveniently opened and closed, and the sealing performance of the inner door is guaranteed. The outer sealed protective front door is provided with an electronic door lock with power-off self-locking and power-on self-opening, so as to avoid the problem of overflow of hot chamber pollution air caused by mistaken opening of the door when the exhaust air fails to work due to power failure.

[0010] As optimization, the cabinet is an inner wall with a lead protective plate and an outer wall shell, and a side inner wall outer jacket cavity is arranged between the inner wall and the lead protective plate; a control box and an air inlet filter are arranged on the upper and lower parts of the top chamber front vertical surface respectively, a static pressure air supply box is connected to the rear outlet of the air inlet filter through an air inlet pipe with an air inlet adjusting valve upward, the static pressure air supply box is connected to the parallel arranged main and auxiliary air supply air-tight one-way valves downward, the main air supply air-tight one-way valve is connected to the main air supply pipe in the shielded and separately packaged hot chamber downward, and the auxiliary air supply air-tight one-way valve is connected to the auxiliary air supply pipe in the shielded and separately packaged hot chamber downward. In this way, the main and auxiliary air supply air-tight one-way valves can be opened and closed according to the air flow and pressure conditions of the respective air supply pipes and hot chambers, so as to meet the needs of automatic control of the air supply pipes.

[0011] The upper outlet of the exhaust fan box is connected upward to an external exhaust pipeline outside the top chamber for discharging exhaust air. Two parallel exhaust fans in the exhaust fan box are respectively connected downward to main and auxiliary exhaust air-tight one-way valves. The main air-tight one-way valve is connected downward to a main exhaust pipeline in the shielded middle hot chamber. The auxiliary air-tight one-way valve is connected downward to an auxiliary exhaust pipeline in the shielded in-out lower hot chamber. In this way, the main exhaust pipeline and its main and auxiliary exhaust air-tight one-way valves are respectively configured with fans, so that the exhaust intensity can be adjusted according to the artificial nuclear medicine distribution in each hot chamber and the radiation and leakage risk. The main and auxiliary exhaust air-tight one-way valves can be opened and closed according to the air flow and pressure conditions of the exhaust pipelines and the hot chambers, so as to meet the needs of automatic opening and closing of the exhaust pipelines. The air-tight one-way valve is a medical one-way valve with a document number CN 221723465U, which has better sealing performance and is easier to open and close under different working conditions. The control box is provided with an electric controller, a middle hot chamber pressure gauge for detecting the air pressure in the shielded middle hot chamber, a lower hot chamber pressure gauge for detecting the air pressure in the shielded in-out lower hot chamber, and a fresh air pressure gauge for detecting the atmospheric pressure outside the cabinet, which are used to control the speed-regulating exhaust fans arranged in each hot chamber. The frame at the middle height of the vertical cabinet is provided with a display control screen connected to the controller through a rotary support. The middle hot chamber pressure gauge and the lower hot chamber pressure gauge are used to detect the air pressure in the relevant hot chambers in real time, so as to prevent the air pressure in the relevant hot chambers from being higher than or close to the atmospheric pressure of the region where the equipment is located. The fresh air pressure gauge is used to determine the atmospheric pressure of the region where the equipment is located, that is, the atmospheric pressure outside the cabinet, because even if the region where the equipment is located is fixed, the atmospheric pressure may fluctuate due to weather. The middle and lower hot chamber annular pressure sealing air bag pressure gauges are arranged below the middle and lower hot chamber annular pressure sealing air bags, so that the sealing working conditions of the annular pressure sealing air bags of the doors of each chamber can be observed in real time.

[0012] As an optimization, the main and auxiliary air supply pipelines extend downward along the outer jacket cavities of the side inner walls of the shielded middle hot chamber and the shielded in-out lower hot chamber, and the main air supply port and the auxiliary air supply port are respectively projected from the front upper part of the side inner walls of the shielded middle hot chamber and the shielded in-out lower hot chamber.

[0013] The main and auxiliary air supply pipelines extend downward along the outer jacket cavities of the rear inner walls of the shielded middle hot chamber and the shielded in-out lower hot chamber, and the main air supply port and the auxiliary air supply port are respectively projected from the lower part of the rear inner walls of the shielded middle hot chamber and the shielded in-out lower hot chamber. Moreover, the main and auxiliary air supply ports and the main and auxiliary air exhaust ports are respectively arranged far away from each other, that is, the main and auxiliary air supply ports are arranged in front of and behind each other, and the main and auxiliary air exhaust ports are arranged to the right and left of each other. In this way, the air is supplied from the front side of the hot chamber and exhausted from the rear right side of the hot chamber, which is more conducive to driving the hot air rising in the hot chamber to circulate downward, so as to avoid the hot air stagnating in the top of the hot chamber.

[0014] As optimization, the main and auxiliary air supply ports are located at the front end of the side wall of the hot chamber, and the main and auxiliary air exhaust ports are located at the rear end of the rear wall opposite to the front end. In this way, the long distance between the air supply port and the air exhaust port in the same hot chamber is ensured, so that the ability of the circulating airflow in the hot chamber to carry the air mixed from other areas in the chamber is increased, and the air renewal and purification capacity in the hot chamber is further enhanced. It is more beneficial to set the corner protection lead plate outside the inner wall of the left inner corner of the hot chamber, so that the corner gap between the lead protection plate can be set as other vertical lines including cable lines and liquid lines, and the liquid lines will not radiate into the hot chamber or outward.

[0015] As optimization, the main and auxiliary air supply air-tight one-way valves, the main and auxiliary air supply pipelines and the main and auxiliary air supply ports are arranged in sequence from front to back at the rear wall of the side wall, and the main and auxiliary air exhaust air-tight one-way valves, the main and auxiliary air exhaust pipelines and the main and auxiliary air exhaust ports are arranged in sequence from far to near along the rear wall. The air speed detectors electrically connected to the controller are arranged on the main and auxiliary air exhaust pipelines. In this way, when the two air exhaust fans are main and auxiliary speed-regulating fans, the main and auxiliary air exhaust pipeline and the inner air speed can be detected in real time through the main and auxiliary air speed detector control heads, so that the speed of the main and auxiliary speed-regulating fans can be controlled by the controller under suitable working conditions, so that the waste of electric energy and unnecessary large noise caused by excessive wind power can be avoided, and sufficient air exhaust power can be ensured to avoid the overflow of contaminated air in the hot chamber.

[0016] After the above technical scheme is adopted, the high-efficiency air supply and exhaust device of the artificial nuclear medicine split charging hot chamber cabinet has the advantages that air overflow in the hot chamber can be prevented when the door is opened, the quality of the exhaust air is significantly improved, and the radionuclide pollution in the hot chamber can be maintained at a reasonable low level through the adsorption of the inner circulating airflow. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 FIG. 1 is a side view structural schematic diagram of the first embodiment of the high-efficiency air supply and exhaust device of the artificial nuclear medicine split charging hot chamber cabinet. Figure 2 FIG. 2 is a front view structural schematic diagram of the first embodiment of the high-efficiency air supply and exhaust device of the artificial nuclear medicine split charging hot chamber cabinet. Figure 3 FIG. 3 is a front view structural schematic diagram of the air path and related parts of the first embodiment of the high-efficiency air supply and exhaust device of the artificial nuclear medicine split charging hot chamber cabinet. Figure 4 FIG. 4 is a side view structural schematic diagram of the air path and related parts of the first embodiment of the high-efficiency air supply and exhaust device of the artificial nuclear medicine split charging hot chamber cabinet. Figure 5 FIG. 5 is a top view structural schematic diagram of the first embodiment of the high-efficiency air supply and exhaust device of the artificial nuclear medicine split charging hot chamber cabinet. Figure 6 FIG. 6 is a top view structural schematic diagram of the first embodiment of the high-efficiency air supply and exhaust device of the artificial nuclear medicine split charging hot chamber cabinet in the open door state. Figure 7It is the second embodiment of the high-efficiency air supply and exhaust device of the artificial nuclear medicine split charging hot cell cabinet. DETAILED DESCRIPTION

[0018] As shown in the first embodiment, the high-efficiency air supply and exhaust device of the artificial nuclear medicine split charging hot cell cabinet is a vertical cabinet including an air supply and exhaust top chamber 3 and a shielding split charging middle hot cell 2 and a shielding access lower hot cell 1 respectively provided with a sealed protective front door. Figures 1-6 In the normal closed door working state, the output air pressure of the air supply port in the same hot cell is lower than the suction internal pressure of the air exhaust port, so that a negative air pressure working state is formed in the hot cell and air leakage in the hot cell is avoided. When the output air pressure of the air supply port is lower than the atmospheric pressure of the equipment location, when any one of the sealed protective front doors is opened, the air pressure will increase due to the influx of air in the hot cell where the sealed protective front door is located, and the air pressure in the hot cell where the other sealed protective front door is not opened will still be in a significantly low air pressure state under normal circumstances, so that the air supply pipeline connected to the opened hot cell is automatically closed, and air is taken through the open protective front door, thereby preventing the opened hot cell from overflowing and polluting the air. More particularly, in the closed door state, all one-way valves are fully closed, which prevents air in the hot cell from overflowing. More particularly, in the normal closed door state, air is supplied from the high-position air supply port close to the sealed protective front door to the lower hot cell, and air is exhausted from the low-position air exhaust port away from the sealed protective front door. At the same time, the low-position air exhaust port will form an upward air current by the aid of the downward air current formed by the high-position air supply port, and ultimately form a circulating air current, so that the activated carbon filter provided on the low-position air exhaust port can not only filter and adsorb artificial nuclear pollutants in the air current passing through it, but also can adsorb artificial nuclear pollutants in the circulating air current in front of it, and can maintain the artificial nuclear pollution level of the air in the hot cell to a reasonable low level by continuous circulating adsorption, thereby further preventing the overflow of artificial nuclear pollutants. Therefore, the device has the advantages of ensuring the quality of the exhaust air, preventing air in the hot cell from overflowing when the door is opened, and maintaining the nuclear pollution level of the air in the hot cell to a reasonable low level by circulating air adsorption.

[0019] Specifically, the air outlet is arranged at the lower part of the inner rear wall of the shielded sub-packaging hot cell 2 and the shielded access lower hot cell 1 opposite to the protective front door, and the activated carbon filter 8 is sealingly connected to the air outlet. More specifically, the activated carbon filter 8 is a front facade air inlet, a rear facade air outlet, and a middle transverse activated carbon filter body. Specifically, the activated carbon filter is provided with an air inlet grating or mesh on the front facade, an air outlet grating or mesh on the rear facade, and a transverse activated carbon filter body in the middle. More specifically, the activated carbon filter 8 is vertically spaced from the hot cell inner bottom plate, and the front and rear of the transverse activated carbon filter body are respectively provided with air inlet and outlet spacing gratings or meshes. The cabinet is a lead protective plate 99 on the inner wall and an outer wall shell. The front facade air inlet is a front lower inclined surface type inclined to the lower front. The cross section of the activated carbon filter 8 connected to the rear end of the air outlet pipeline is a right-angled trapezoidal with the inclined side facing the lower front.

[0020] Specifically, the sealed protective front door is an inner and outer two-way sealed protective front door, and the outer sealed protective front door 9 is provided with a lead glass transparent door plate, and the inner sealed protective front door 91 is provided with a light transparent door plate. The outer and inner two-way sealed protective front doors 9, 91 are hinged to the outer frame of the hot cell door on one side, and the inner lead glass door plate has a lead glass inner convex surface embedded with the inner periphery of the outer door frame. The outer periphery of the lead glass inner convex surface is provided with a silica gel sealing ring 901 sealingly matched with the outer door frame. The inner periphery of the outer door frame is provided with an inner door frame, and the inner periphery of the outer door frame is hinged to a transparent organic glass door plate, and the inner periphery of the inner door frame is provided with a ring-shaped pressure sealing air bag 902 sealingly matched with the outer periphery of the transparent organic glass door plate. The transparent organic glass door plate is a 10mm thick transparent acrylic door. The outer sealed protective front door 9 is provided with a power-off self-locking power-on or power-on self-opening electronic door lock 96, so as to avoid the problem of misopening the door and causing the hot cell to overflow the contaminated air when the air outlet is not working due to power failure.

[0021] Specific is the cabinet is the inner wall outer lead protection plate and its outer wall shell, the inner wall and the lead protection plate are side inner wall outer jacket cavity; The front facade of the top room 3 is provided with a lower control box 33 and an upper air inlet filter 44 respectively, the static pressure air supply box 4 is connected to the rear outlet of the air inlet filter 44 through the air inlet pipe 71 provided with an air inlet regulating valve 77, the static pressure air supply box 4 is connected to the parallel main and auxiliary air supply air-tight one-way valves 401, 402, the main air supply air-tight one-way valve 401 is connected to the main air supply pipeline 41 leading into the shielded and packaged middle hot chamber 2, and the auxiliary air supply air-tight one-way valve 402 is connected to the auxiliary air supply pipeline 42 leading into the shielded and packaged lower hot chamber 1; The upper outlet of the exhaust fan box 5 is connected to the outer exhaust pipeline 70 leading out of the top room 3, and the two parallel exhaust fans 55 in the exhaust fan box 5 are connected to the main and auxiliary exhaust air-tight one-way valves 501, 502 respectively, the main air-tight one-way valve 501 is connected to the main exhaust pipeline 51 leading into the shielded and packaged middle hot chamber 2, and the auxiliary air-tight one-way valve 502 is connected to the auxiliary exhaust pipeline 52 leading into the shielded and packaged lower hot chamber 1. The control box 33 is provided with a middle hot chamber pressure gauge 26 and a lower hot chamber pressure gauge 16 respectively for detecting the air pressure in the shielded and packaged middle hot chamber and the shielded and packaged lower hot chamber, and a fresh air pressure gauge 36 for detecting the atmospheric pressure outside the cabinet, which is used to control the speed-regulating exhaust fan matched with each hot chamber. The frame at the middle height of the cabinet is provided with a display control screen 6 connected to the controller through a rotary support. The middle hot chamber pressure gauge and the lower hot chamber pressure gauge are used to detect the air pressure in the relevant chamber in real time to prevent the air pressure in the relevant chamber from being higher than or close to the atmospheric pressure of the region where the equipment is located. The fresh air pressure gauge is used to determine the atmospheric pressure of the region where the equipment is located, that is, the atmospheric pressure outside the cabinet, because even if the region where the equipment is located is fixed, the atmospheric pressure will fluctuate due to weather. The lower hot chamber and the lower hot chamber are provided with a middle hot chamber and a lower hot chamber ring-shaped pressure sealing air bag pressure gauge 27, 17 respectively, so that the sealing condition of the ring-shaped pressure sealing air bag of the inner door of each chamber can be observed in real time. In this way, the main exhaust pipeline and its main and auxiliary exhaust air-tight one-way valves are respectively matched with the fan, so that the exhaust intensity can be adjusted according to the radiation and leakage of the artificial nuclear medicine in each hot chamber. The main and auxiliary exhaust air-tight one-way valves can be opened and closed according to the air flow and pressure conditions of the exhaust pipeline and the hot chamber to meet the needs of automatic control of the exhaust pipeline. The air-tight one-way valve is a medical one-way valve with a document number CN 221723465U, which has better sealing performance and is easier to open and close according to the working condition.

[0022] More specifically, the main air supply duct 41 and the auxiliary air supply duct 42 extend downward along the outer jacket cavity of the inner wall of the shielded sub-packing heating chamber 2 and the shielded inlet and outlet lower heating chamber 1, and respectively protrude the main air supply port 403 from the upper front part of the inner wall of the shielded sub-packing heating chamber 2 and the auxiliary air supply port 404 from the upper front part of the inner wall of the shielded inlet and outlet lower heating chamber 1; the cabinet is an inner wall covered with a lead protective plate and its outer shell, and the space between the inner wall and the lead protective plate is the outer jacket cavity of the inner wall. The main exhaust duct 51 and the auxiliary exhaust duct 52 extend downwards along the inner wall of the shielded intermediate heating chamber 2 and the shielded lower heating chamber 1, respectively. A main exhaust port 503 equipped with an activated carbon filter 8 protrudes from the lower part of the inner wall of the shielded intermediate heating chamber 2, and an auxiliary exhaust port 504 equipped with an activated carbon filter 8 protrudes from the lower part of the inner wall of the shielded lower heating chamber 1. The cabinet consists of an inner wall covered by a lead protective plate and an outer shell, with a side inner wall outer jacket cavity between the inner wall and the lead protective plate. Furthermore, the main and auxiliary air supply ports 403 and 404 are positioned far apart from the main and auxiliary exhaust ports 503 and 504, that is, the main and auxiliary air supply ports 403 and 404 are spaced apart from front to back, and the main and auxiliary exhaust ports 503 and 504 are spaced apart from right to left. The airtight one-way valve is a medical one-way valve with document number CN 221723465U. Specifically, the main and auxiliary air supply outlets 403 and 404 are located at the front end of the side wall of the hot chamber, while the main and auxiliary exhaust outlets 503 and 504 are located at the far end of the rear wall of the hot chamber, opposite to the front end. This also facilitates the installation of a corner protection lead plate on the outer side of the inner wall of the left inner corner of the hot chamber, allowing for the installation of other vertical lines 7, including cable lines and liquid lines, in the corner sleeve gap between the lead protection plate and the wall. Furthermore, it prevents the liquid lines from radiating into or outward from the hot chamber.

[0023] More specifically, the main and auxiliary air supply airtight one-way valves 401 and 402, their main and auxiliary air supply pipes 41 and 42, and their main and auxiliary air supply outlets 403 and 404 are arranged sequentially from front to back on the side wall. The main and auxiliary exhaust airtight one-way valves 501 and 502, their main and auxiliary exhaust pipes 51 and 52, and their main and auxiliary exhaust outlets 503 and 504 are arranged sequentially from farthest to nearest along the rear wall from the main and auxiliary air supply outlets 403 and 404. The main and auxiliary exhaust ducts 41 and 42 are respectively equipped with wind speed detectors 61 electrically connected to the controller. When the two exhaust fans are the main and auxiliary speed-regulating fans, the wind speed in the main and auxiliary exhaust ducts 41 and 42 is detected in real time by the main and auxiliary wind speed detectors 61. The controller can control the speed of the main and auxiliary speed-regulating fans to a suitable operating condition, which can avoid the waste of electricity and unnecessary noise caused by excessive wind force, and ensure sufficient exhaust wind force to prevent polluted air from overflowing from the hot room.

[0024] Example 2, as Figure 7 As shown, the difference between the high-efficiency air supply and exhaust device of the artificial radiopharmaceutical dispensing hot chamber cabinet of this utility model and the above-mentioned embodiment 1 is that the front air inlet face is a forward-downward sloping face. The cross-section of the activated carbon filter 8 connected to the exhaust duct at the rear end is a right-angled trapezoid with the sloping side facing forward and downward.

[0025] In summary, the high efficiency air supply and exhaust device of the new type artificial nuclear medicine dispensing hot cell cabinet has the advantages of preventing air in the hot cell from overflowing when the door is opened, significantly improving the quality of the exhaust air, and maintaining the nuclide pollution in the hot cell air to a reasonable low level through the adsorption of the internal circulating air flow.

Claims

1. A high-efficiency air supply and exhaust device for a hot chamber cabinet for artificial radiopharmaceutical dispensing, the cabinet comprising a top air supply and exhaust chamber, a shielded dispensing hot chamber with a sealed protective front door, and a shielded inlet and outlet lower hot chamber, characterized in that... The static pressure air supply box and the exhaust fan box, which are arranged side by side in the air supply and exhaust top chamber, are respectively connected downwards through a backflow preventer air supply pipe to the air supply port near the sealed protective front door at the upper part of the shielded sub-packing medium heating chamber and the shielded inlet and outlet lower heating chamber, and to the exhaust port equipped with an activated carbon filter at the lower part of the shielded sub-packing medium heating chamber and the shielded inlet and outlet lower heating chamber, which are connected downwards through a backflow preventer exhaust pipe.

2. The high-efficiency air supply and exhaust device for the artificial radiopharmaceutical dispensing heat chamber cabinet according to claim 1, characterized in that... The exhaust vent is located on the lower part of the inner rear wall of the shielded sub-packing heating chamber and the shielded inlet / outlet lower heating chamber, which are opposite to the protective front door. An activated carbon filter is installed on the exhaust vent.

3. The high-efficiency air supply and exhaust device for the artificial radiopharmaceutical dispensing hot chamber cabinet according to claim 2, characterized in that... The activated carbon filter has an air intake at the front, an air outlet at the rear, and a horizontal activated carbon filter element in the middle.

4. The high-efficiency air supply and exhaust device for the artificial radiopharmaceutical dispensing heat chamber cabinet according to claim 3, characterized in that... The activated carbon filter is vertically spaced from the bottom plate of the heating chamber, and the front and rear of the horizontal activated carbon filter body are respectively provided with air inlet and air outlet grilles or grids.

5. The high-efficiency air supply and exhaust device for the artificial radiopharmaceutical dispensing hot chamber cabinet according to claim 3 or 4, characterized in that... The front air intake is a downward-sloping front face.

6. The high-efficiency air supply and exhaust device for the artificial radiopharmaceutical dispensing hot chamber cabinet according to claim 1, characterized in that... The sealed protective front door consists of two layers of sealed protective doors, an outer sealed protective front door with a lead glass transparent door panel and an inner sealed protective front door with a lightweight transparent door panel. The two sealed protective front doors are lead glass door panels that are hinged to one side of the hot chamber door frame. Inside, there is a lead glass inner convex surface that fits into the inner circumference of the outer door frame. The outer circumference of the lead glass inner convex surface is provided with a silicone sealing ring that seals with the inner circumference of the outer door frame.

7. The high-efficiency air supply and exhaust device for the artificial radiopharmaceutical dispensing heat chamber cabinet according to claim 1, characterized in that... The cabinet consists of an inner wall covered with a lead protective plate and an outer shell. The space between the inner wall and the lead protective plate is a side inner wall outer jacket cavity. An air inlet filter is installed on the upper part of the front facade of the air supply and exhaust top chamber. The static pressure air supply box is connected to the rear outlet of the air inlet filter through an air inlet pipe equipped with an air inlet regulating valve. The static pressure air supply box is connected to parallel main and auxiliary air supply airtight one-way valves at the bottom. The main air supply airtight one-way valve is connected to the main air supply pipe introduced into the shielded sub-heat chamber at the bottom. The auxiliary air supply airtight one-way valve is connected to the auxiliary air supply pipe introduced into the shielded sub-heat chamber at the bottom. The upper outlet of the exhaust fan box is connected upward to the external exhaust duct leading to the top of the exhaust fan box. Inside the exhaust fan box, two parallel exhaust fans are respectively connected downward to the main and auxiliary exhaust airtight one-way valves. The main airtight one-way valve is connected downward to the main exhaust duct leading to the shielded sub-heat chamber, and the auxiliary airtight one-way valve is connected downward to the auxiliary exhaust duct leading to the shielded lower heat chamber.

8. The high-efficiency air supply and exhaust device for the artificial radiopharmaceutical dispensing hot chamber cabinet according to claim 7, characterized in that... The main air supply duct and the auxiliary air supply duct extend downward along the outer jacket cavity of the inner wall of the shielded sub-assembly medium heating chamber and the shielded inlet and outlet lower heating chamber, respectively protruding from the upper front part of the inner wall of the shielded sub-assembly medium heating chamber and from the upper front part of the inner wall of the shielded inlet and outlet lower heating chamber. The main exhaust duct and the auxiliary exhaust duct extend downward along the inner wall of the shielded intermediate heating chamber and the shielded lower heating chamber, respectively. The main exhaust port equipped with an activated carbon filter protrudes from the lower part of the inner wall of the shielded intermediate heating chamber, and the auxiliary exhaust port equipped with an activated carbon filter protrudes from the lower part of the inner wall of the shielded lower heating chamber.

9. The high-efficiency air supply and exhaust device for the artificial radiopharmaceutical dispensing heat chamber cabinet according to claim 8, characterized in that... The main and auxiliary air supply outlets are located at the front end of the hot chamber side wall, and the main and auxiliary air exhaust outlets are located at the far end of the hot chamber rear wall opposite to the front end.

10. The high-efficiency air supply and exhaust device for the artificial radiopharmaceutical dispensing hot chamber cabinet according to claim 7, characterized in that... The main and auxiliary air supply airtight one-way valves, their main and auxiliary air supply pipelines, and their main and auxiliary air supply outlets are arranged sequentially from front to back on the side wall. The main and auxiliary exhaust airtight one-way valves, their main and auxiliary exhaust pipelines, and their main and auxiliary exhaust outlets are arranged sequentially from farthest to near the main and auxiliary air supply outlets along the rear wall.

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