Low-humidity negative-pressure weighing cover

Abstract

The utility model discloses a low-humidity negative-pressure weighing cover which comprises a negative-pressure weighing cover body, a weighing area and an equipment area are arranged in the negative-pressure weighing cover body, the weighing area and the equipment area are separated by a partition plate, an air inlet area is arranged at the top of the weighing area, and a flow equalizing film is arranged between the air inlet area and the weighing area. A dehumidification system, an air pretreatment system and a purification system are integrated in the equipment area, before air enters the weighing cover, large-particle impurities in the air are removed through the pretreatment system, and then dehumidification and drying are conducted through the dehumidification system, so that the content of water vapor in the air is reduced, and it is guaranteed that medicine cannot absorb moisture and go bad in the medicine weighing process; according to the utility model, by integrating dehumidification, purification and refrigeration into a whole, a low-temperature, low-humidity and clean negative pressure weighing environment is provided for a weighing area, and the weight of the weighing area is reduced, so that the weight of the weighing area is reduced, the weight of the weighing area is reduced, the weight of the weighing area is reduced, and the weight of the weighing area is reduced. And an ideal weighing condition is provided for a pharmaceutical clean environment.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of negative pressure weighing cover, specifically a low humidity negative pressure weighing cover. BACKGROUND

[0002] In the pharmaceutical industry, the accurate weighing of medicines is crucial to product quality, especially when dealing with medicines such as powders and liquids that are prone to moisture and deterioration, the humidity and cleanliness of the weighing environment need to be strictly controlled. Although the traditional negative pressure weighing cover can form a certain negative pressure environment, it often does not remove water vapor in the air, which enters the weighing cover and easily causes some medicines to become damp and deteriorate, making it difficult to meet the high standard requirements of the pharmaceutical industry. INVENTION CONTENTS

[0003] In view of the problems existing in the prior art, the utility model provides a low humidity negative pressure weighing cover, which realizes accurate control of the low humidity and negative pressure environment inside the weighing cover by integrating a dehumidification system, provides ideal weighing conditions for the clean environment of the pharmaceutical industry, and reduces energy consumption and maintenance costs.

[0004] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0005] A low humidity negative pressure weighing cover, comprising a negative pressure weighing cover body, a weighing area and a device area are arranged in the negative pressure weighing cover body, the weighing area and the device area are isolated by a partition, an air inlet area is arranged at the top of the weighing area, a flow equalizing film is arranged between the air inlet area and the weighing area, a dehumidification system, an air pretreatment system and a purification system are integrated in the device area;

[0006] The dehumidification system comprises a dehumidification tower, a spray head is arranged in the dehumidification tower, a wet air inlet, a dry air outlet, an adsorption liquid inlet and an adsorption liquid outlet are arranged on the dehumidification tower, the wet air inlet is connected with the air pretreatment system, the adsorption liquid inlet is communicated with the spray head, and an adsorption liquid inlet pipe is used for introducing adsorption liquid;

[0007] The purification system comprises a high efficiency filter or an activated carbon filter, which is used for purifying the air again, and the purification system is connected with the dry air outlet of the dehumidification tower through an air conveying pipe.

[0008] Further, the dehumidification system comprises a regeneration tower and a heat exchanger, the regeneration tower is connected with a vacuum system, a heater, a liquid inlet, a liquid outlet and a steam outlet are arranged on the regeneration tower, the liquid inlet of the regeneration tower is connected with the adsorption liquid outlet of the dehumidification tower through a pipeline, and the liquid outlet of the regeneration tower is connected with the heat exchanger and the adsorption liquid inlet of the dehumidification tower through a pipeline.

[0009] Further, the steam outlet at the top of the regeneration tower is connected with a condenser through a pipeline.

[0010] Further, the adsorption liquid outlet is connected with the adsorption liquid inlet through an adsorption liquid inlet pipe.

[0011] Further, the equipment area is provided with an air inlet fan and an air return box, the air inlet area is provided with a high efficiency air filter, the high efficiency air filter is connected with the air inlet fan through an air inlet pipe, and an air outlet is arranged at the end of the high efficiency air filter.

[0012] Further, the air return box is connected with the air pre-treatment system through a pipeline.

[0013] Further, a refrigeration system is arranged, the refrigeration system is connected with the purification system through a pipeline, and the air outlet of the refrigeration system is connected with the air inlet fan through a pipeline.

[0014] Further, the air outlet of the purification system is divided into two branches, one branch is that the air outlet of the purification system is connected with the air inlet fan through a pipeline, and the other branch is that the air outlet of the purification system is connected with the air inlet of the refrigeration system and the air inlet fan through a pipeline.

[0015] Further, the pressure sensor, the temperature sensor and the humidity sensor are sequentially arranged in the weighing area from top to bottom.

[0016] Further, a humidity sensor is arranged on the air conveying pipe between the dehumidification tower and the purification system, and the dry air outlet of the dehumidification tower is connected with the wet air inlet pipe.

[0017] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0018] 1) The low-humidity negative pressure weighing cover of the utility model, before air enters the weighing cover, removes large particle impurities in the air by using a pre-treatment system, then carries out dehumidification and drying by using a dehumidification system, so as to reduce the content of water vapor in the air and ensure that the medicine will not be damp and deteriorated during the weighing process; the dehumidified air is sent into a purification system to remove micro-particles, so as to ensure that the air entering the weighing cover is clean and eliminate the influence of impurities in the air on the weighing result and the quality of the medicine; the utility model integrates dehumidification, purification and refrigeration into one, provides a low-temperature, low-humidity and clean negative pressure weighing environment for the weighing area, provides ideal weighing conditions for the pharmaceutical clean environment, and reduces energy consumption and maintenance cost.

[0019] 2) The dehumidification system adopted by the utility model can realize efficient dehumidification under lower energy consumption, accurately control humidity, ensure the low-humidity environment of the weighing environment, and has the advantages of high dehumidification efficiency and environmental protection, and the dehumidification process is easy to be cooled, so as to realize isothermal dehumidification, reduce irreversible loss, and have higher thermodynamic perfection.

[0020] 3) The utility model can effectively control the stable airflow of the weighing area and effectively prevent powder flying by arranging the flow equalization film.

[0021] 4)The utility model discloses weighing cover body adopts high -quality stainless steel material to make, combine dehumidification system and filtration purification system, ensure the cleanliness of weighing environment;

[0022] 5)The utility model discloses adsorbing liquid (potassium chloride saturated solution) absorbs the moisture in the air, and also can cause the concentration of the material in the cell and the damage of cell structure under the high osmotic pressure environment, and then kill the bacteria, to reach the purpose of sterilization;

[0023] 6)The utility model discloses adsorbing liquid is reused after regeneration, no discharge, no pollution;

[0024] 7)The utility model discloses low humidity negative pressure weighing cover is especially suitable for the industry, such as pharmaceutical, chemical industry, food, needing high cleanliness and low humidity environment, and the adsorption characteristics of adsorbing liquid also are suitable for the adsorption purification of air pollution, toxic, peculiar smell environment. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is the structure principle diagram of the utility model discloses low humidity negative pressure weighing cover.

[0026] In the drawing: 100, weighing cover body;110, weighing area;111, pressure sensor;112, temperature sensor;113, 226-humidity sensor;120, partition;130, equipment area;131, air inlet fan;132, air inlet pipe;133, return air box;140, air inlet area;141, high -efficient air filter;142, air outlet;150, flow equalizing film;200, dehumidification system;220, dehumidification tower;221, wet air inlet;222, spray head;223, dry air outlet;224, adsorbing liquid inlet;225, adsorbing liquid outlet;230, regeneration tower;231, liquid outlet;232, liquid inlet;233, steam exhaust;240, heat exchanger;250, condenser;310, air pretreatment system;320, purification system;400, refrigeration system. DETAILED DESCRIPTION

[0027] The utility model makes further explanation in combination with the drawings, but the range of protection of the utility model is not limited to the range described.

[0028] As Figure 1 Shown, a kind of low humidity negative pressure weighing cover, including negative pressure weighing cover body 100, negative pressure control system is equipped in negative pressure weighing cover body 100, by adjusting air supply and exhaust capacity, maintain the stable negative pressure state of weighing area, weighing area 110 and equipment area 130 are equipped in negative pressure weighing cover body 100, weighing area 110 is isolated between equipment area 130 by partition 120, avoid the air of equipment area without being treated to enter weighing area, weighing area 110 is equipped with pressure sensor 111, temperature sensor 112 and humidity sensor 113.

[0029] The equipment area 130 is provided with an air inlet fan 131, an air inlet pipe 132 and an air return box 133. The air inlet pipe 132 is communicated with an air inlet area 140 located on the top of the weighing area 110. A flow equalization film 150 is arranged between the air inlet area 140 and the weighing area 110 for controlling the air flow rate. The air inlet area 140 is further provided with a high-efficiency air filter 141. The air inlet pipe 132 is connected with the high-efficiency air filter 141 for further purifying the air entering the weighing area. An air outlet 142 is arranged at the end of the high-efficiency air filter 141 for discharging the excess air.

[0030] The equipment area 130 is integrated with a dehumidification system 200, an air pretreatment system 310 and a purification system 320.

[0031] The air pretreatment system 310 includes a primary filter and a medium-efficiency filter for pretreating the air and removing large-particle impurities in the air.

[0032] The dehumidification system 200 includes a dehumidification tower 220. The dehumidification tower 220 is provided with a spray head 222. The dehumidification tower 220 is further provided with a wet air inlet 221, a dry air outlet 223, an adsorption liquid inlet 224 and an adsorption liquid outlet 225. The wet air inlet 221 is connected with the air pretreatment system 310. The adsorption liquid inlet 224 is communicated with the spray head 222. The adsorption liquid inlet pipe is used for introducing the adsorption liquid. The adsorption liquid is a concentrated potassium chloride solution.

[0033] In addition, the adsorption liquid outlet 225 is connected with the adsorption liquid inlet 224 through an adsorption liquid inlet pipe.

[0034] The purification system 320 includes a high-efficiency filter or an activated carbon filter for purifying the air again. The purification system 320 is connected with the dry air outlet 223 of the dehumidification tower 220 through an air conveying pipe. A humidity sensor 226 is arranged on the air conveying pipe between the dehumidification tower 220 and the purification system 320. The dry air outlet 223 of the dehumidification system 200 is also connected with the wet air inlet 221 through a pipeline. A control valve is arranged on the pipeline. When the humidity of the air discharged from the dry air outlet 223 of the dehumidification tower 220 is within the set range, the dry air can be directly sent to the purification system 320 for purification. When the detected humidity exceeds the standard, the air is returned to the dehumidification tower 220 for re-adsorption and dehumidification.

[0035] The refrigeration system 400 is connected with the purification system 320 through a pipeline. The air outlet of the refrigeration system 400 is connected with the air inlet fan 131 through a pipeline for cooling the dry air according to the temperature requirement of the weighing.

[0036] The air outlet of the purification system 320 is divided into two branches, one branch is that the air outlet of the purification system 320 is connected with the air inlet of the air inlet fan 131 through a pipeline, and the other branch is that the air outlet of the purification system 320 is connected with the air inlet of the refrigeration system 400 and the air inlet of the air inlet fan 131 through a pipeline.

[0037] As a preferred mode of the embodiment, the dehumidification system 200 comprises a regeneration tower 230, the regeneration tower 230 is connected with a vacuum system, the vacuum system is used for maintaining the vacuum degree in the regeneration tower 230, reducing the boiling point of water, so that the water can be evaporated at low temperature, the regeneration tower 230 is provided with a heater, a liquid inlet 232, a liquid outlet 231 and a steam outlet 233, the liquid inlet 232 of the regeneration tower 230 is connected with the adsorbed liquid outlet 225 of the dehumidification tower 220 through a pipeline, the liquid outlet 231 of the regeneration tower 230 is connected with the heat exchanger 240 and the adsorbed liquid inlet 224 of the dehumidification tower 220 through a pipeline, after the adsorbed liquid (potassium chloride concentrated solution) adsorbs the water in the air, the adsorbed liquid becomes a dilute solution, the dilute solution is discharged from the adsorbed liquid outlet 225 of the dehumidification tower 220 to the regeneration tower 230, the water vapor is evaporated in the regeneration tower 230 under the condition of low temperature and vacuum, and the water vapor becomes a concentrated solution again, the concentrated solution is cooled to a suitable temperature through the heat exchanger 240 and then is sent into the dehumidification tower 230 for circulation, and the steam outlet 233 of the regeneration tower 230 is connected with the condenser 250 through a pipeline.

[0038] As a preferred mode of the embodiment, the return air box 133 is provided with a primary filter and a medium filter, the return air box 133 is connected with the air pretreatment system 310, and the air in the weighing area 110 of the negative pressure weighing hood is discharged after being treated by the primary filter and the medium filter in the return air box 133, so that dust, harmful gas and the like are prevented from being discharged.

[0039] The low-humidity negative pressure weighing hood provided by the utility model, before air enters the weighing hood, the air pretreatment system 310 is used to remove large-particle impurities in the air, and then the dehumidification system 200 is used to dehumidify and dry, so that the content of water vapor in the air is reduced, and it is ensured that the medicine is not damp and deteriorated during weighing; the dehumidified air is sent into the purification system 320 to remove micro-particles, so that the air entering the weighing hood is clean, and the influence of impurities in the air on the weighing result and the quality of the medicine is eliminated.

Claims

1. A low-humidity negative pressure weighing hood, comprising a negative pressure weighing hood body (100), a weighing area (110) and a device area (130) are arranged in the negative pressure weighing hood body (100), the weighing area (110) and the device area (130) are isolated by a partition (120), a wind inlet area (140) is arranged at the top of the weighing area (110), and a flow uniformizing film (150) is arranged between the wind inlet area (140) and the weighing area (110), characterized in that The device area (130) is integrated with a dehumidification system (200), an air pre-treatment system (310) and a purification system (320); The dehumidification system (200) comprises a dehumidification tower (220) provided with a spray head (222), and the dehumidification tower (220) is provided with a wet air inlet (221), a dry air outlet (223), an adsorption liquid inlet (224) and an adsorption liquid outlet (225), the wet air inlet (221) is connected with the air pre-treatment system (310), the adsorption liquid inlet (224) is communicated with the spray head (222), and the adsorption liquid inlet pipe is used for feeding the adsorption liquid. The purification system (320) comprises a high-efficiency filter or an activated carbon filter, which is used for purifying the air again, and the purification system (320) is connected with the dry air outlet (223) of the dehumidification tower (220) through a gas conveying pipe.

2. The low-humidity negative pressure weighing hood according to claim 1, characterized in that The dehumidification system (200) comprises a regeneration tower (230) and a heat exchanger (240), the regeneration tower (230) is connected with a vacuum system, the regeneration tower (230) is provided with a heater, an liquid inlet (232), an liquid outlet (231) and a steam outlet (233), the liquid inlet (232) of the regeneration tower (230) is connected with the adsorption liquid outlet (225) of the dehumidification tower (220) through a pipeline, and the liquid outlet (231) of the regeneration tower (230) is connected with the heat exchanger (240) and the adsorption liquid inlet (224) of the dehumidification tower (220) through a pipeline.

3. The low-humidity negative pressure weighing hood according to claim 2, characterized in that The steam outlet (233) at the top of the regeneration tower (230) is connected with a condenser (250) through a pipeline.

4. The low-humidity negative pressure weighing hood according to claim 1, characterized in that The adsorption liquid outlet (225) is connected with the adsorption liquid inlet (224) through an adsorption liquid inlet pipe.

5. The low-humidity negative pressure weighing hood according to claim 1, characterized in that The device area (130) is provided with an air inlet fan (131) and an air return box (133), the air inlet area (140) is provided with a high-efficiency air filter (141), the high-efficiency air filter (141) is connected with the air inlet fan (131) through an air inlet pipe (132), and the end of the high-efficiency air filter (141) is provided with an air outlet (142).

6. A low-humidity negative pressure weighing hood according to claim 5, characterized in that The air return box (133) is connected with the air pre-treatment system (310) through a pipeline.

7. The low-humidity negative pressure weighing hood according to claim 5, characterized in that A refrigeration system (400) is arranged, the refrigeration system (400) is connected with the purification system (320) through a pipeline, and the air outlet of the refrigeration system (400) is connected with the air inlet fan (131) through a pipeline.

8. The low-humidity negative pressure weighing hood according to claim 7, characterized in that The air outlet of the purification system (320) is divided into two branches, one branch is that the air outlet of the purification system (320) is connected with the air inlet fan (131) through a pipeline, and the other branch is that the air outlet of the purification system (320) is connected with the refrigeration system (400) and the air inlet of the air inlet fan (131) through a pipeline.

9. The low-humidity negative pressure weighing hood according to claim 1, characterized in that The weighing area (110) is sequentially provided, from top to bottom, with a pressure sensor (111), a temperature sensor (112) and a humidity sensor (113).

10. The low-humidity negative pressure weighing hood of claim 1, wherein A humidity sensor (226) is arranged on the gas conveying pipe between the dehumidification tower (220) and the purification system (320), and the dry air outlet (223) of the dehumidification tower (220) is connected with the wet air inlet (221) through a pipeline.

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