Gas control system in purification cabin

Abstract

The utility model relates to the technical field of laboratory gas purification, and discloses a gas control system in a purification cabin, which comprises a chamber, a gas inlet unit used for providing gas into the chamber, a gas exhaust unit used for exhausting the gas in the chamber, and a circulating unit used for realizing the circulation of the gas in the chamber, the circulation unit is provided with an impurity removal module for removing impurities in the gas in the cavity based on the impurity gas adsorption principle; the impurity removal module is an impurity removal module with a desorption function; according to the utility model, the original foreign gas in the chamber is discharged through the communication mode of the gas inlet unit, the chamber and the gas exhaust unit, and the gas in the chamber is subjected to impurity removal and purification in a circulation mode, so that the gas in the chamber is purified, and the desorption gas in the chamber is discharged through the discharge pipeline. And finally, the impurity removal module can be reused in a reduction mode.

Description

Technical Field

[0001] The utility model relates to the technical field of laboratory gas purification, in particular to a gas control system for purifying a cabin. Background Art

[0002] During the experiment, in order to improve the quality and accuracy of the experiment, it is necessary to improve the purity of the gas used for the experiment. The higher the purity of the gas, the more accurate the data obtained from the experiment and the higher the quality of the experiment. Among them, the gases that affect the purity of laboratory gases are generally water, oxygen, etc. Under certain circumstances, the gases contained in the air will also affect the purity of laboratory gases, thereby affecting the quality and accuracy of the experiment.

[0003] In the prior art, a utility model patent (CN218901241U) discloses a gas circulation device for laboratory air purification, including a purification cylinder and a plurality of filter elements. The interior of the purification cylinder is provided with a plurality of purification cavities for placing the filter elements. The interior of the purification cylinder is also provided with a filter channel. The middle of the filter channel passes through the plurality of purification cavities. The two ends of the filter channel are respectively an air inlet and an air outlet. A circulation pipe is also provided on one side of the purification cylinder. One end of the circulation pipe is respectively connected to the plurality of purification cavities, and the other end of the circulation pipe is connected to the air outlet through a three-way valve body. The filter element of the device needs to be replaced regularly.

[0004] Based on this, the technical problem to be solved in this case is: how to provide a sustainable and recyclable purification cabin gas control system. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a control system for purifying gas in a cabin, wherein the utility model continuously introduces gas into the chamber through an air intake unit, and detects whether the air pressure in the chamber is greater than the external air pressure through a pressure detection sensor, and then discharges the original impurity gas in the chamber through an exhaust unit, and then circulates the inert gas between the chamber and the circulation unit through a circulation unit, and further removes impurities and purifies the inert gas through an impurity removal module, wherein the impurity removal module can be restored to its original state by heating, and the exhaust pipe will discharge the impurities separated from the impurity removal module after restoration.

[0006] The technical solution of the utility model is:

[0007] A gas control system for a purification chamber comprises a chamber, an air intake unit for supplying gas to the chamber, an exhaust unit for discharging the gas in the chamber, and a circulation unit for circulating the gas in the chamber; the circulation unit is provided with an impurity removal module for removing impurities from the gas in the chamber based on the principle of impurity gas adsorption; the impurity removal module is an impurity removal module with a desorption function; the circulation unit is provided with an exhaust pipe, and the desorbed gas of the impurity removal module is discharged externally through the exhaust pipe.

[0008] In the above-mentioned control system for purifying gas in a cabin, the inlet of the circulation unit is connected to the exhaust unit; and the outlet of the circulation unit is connected to the intake unit.

[0009] In the above-mentioned control system for gas purification in a chamber, the circulation unit and the exhaust unit, and the circulation unit and the air intake unit are independently connected and disconnected through a control valve or a three-way valve.

[0010] In the above-mentioned gas control system in the purification cabin, the circulation unit and the exhaust unit are connected and disconnected by a three-way valve, and the circulation unit is provided with a circulation valve; the air intake unit is provided with an air intake valve, the circulation unit and the air intake unit are connected by a three-way pipe, and are connected and disconnected by the circulation valve, and the air intake unit and the chamber are connected and disconnected by the air intake valve.

[0011] In the above-mentioned gas control system in the purification chamber, the exhaust unit includes an exhaust pipe connected to the chamber, an exhaust valve connected to the exhaust pipe, and a three-way valve is located between the exhaust valve and the chamber.

[0012] In the above-mentioned gas control system for purification chamber, the circulation unit includes a circulation pipe and a circulation pump. The impurity removal module, the circulation pump and the circulation valve are arranged on the circulation pipe along the gas flow direction. The discharge pipe is located between the circulation pump and the circulation valve. The inlet end of the circulation pipe is connected to the three-way valve, and the outlet end of the circulation pipe and the air intake unit are connected through a three-way pipe.

[0013] In the above-mentioned control system for purifying gas in a cabin, the air intake unit includes an air intake pipeline, an air intake valve is connected to the air intake pipeline, and a circulation pipe is connected between the air intake valve and the chamber.

[0014] In the above-mentioned control system for purifying gas in a cabin, a filter for drying gas and deoxygenating is provided on the air intake unit, and the filter is located between the circulation pipe and the chamber.

[0015] In the above-mentioned control system for purifying gas in a cabin, a water vapor sensor and an oxygen sensor are provided on the exhaust unit.

[0016] In the above-mentioned gas control system in the purification chamber, a gas sensor for detecting impurities and a pressure sensor for detecting the air pressure in the chamber are provided on the chamber.

[0017] One of the above technical solutions of the utility model has at least one of the following advantages or beneficial effects:

[0018] The utility model discharges the original impurity gas in the chamber from the exhaust unit by connecting the air intake unit, the chamber and the exhaust unit, and then allows the gas to pass through the chamber-circulation unit through the circulation unit and continue to circulate. In this circulation process, the impurity removal module removes impurities and purifies the circulating gas, thereby improving the purity of the gas. On the other hand, the impurity removal module removes impurities and purifies the impurity gas by adsorbing the impurity gas, and the impurity removal module will be restored to its original state after heating. Then, the exhaust pipe will discharge the impurity gas separated from the impurity removal module after restoration, thereby realizing the recycling of the impurity removal module and improving the reuse rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the pipeline diagram of Example 1 of the utility model. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0021] Example 1

[0022] See also Figure 1 A gas control system for a purification chamber includes a chamber 1, an air intake unit 2 for providing gas to the chamber 1, an exhaust unit 3 for discharging the gas in the chamber 1, and a circulation unit 4 for circulating the gas in the chamber 1; the circulation unit 4 is provided with a de-impurity module 41 for removing impurities from the gas in the chamber 1 based on the principle of impurity gas adsorption; the de-impurity module 41 is a de-impurity module 41 with a desorption function; the circulation unit 4 is provided with a discharge pipe 42, and the desorbed gas of the de-impurity module 41 is discharged to the outside through the discharge pipe 42.

[0023] In actual application, the staff can control the working time of the three modes and the switching between the three modes through the manual interactive control system according to the specific situation. The three modes are exhaust mode, circulation mode and reduction mode. It should be noted that the gas introduced into the air intake unit 2 in this embodiment is an inert gas, and the connection modes of the exhaust mode, circulation mode and reduction mode are respectively:

[0024] Exhaust mode: the air intake unit 2 is connected to the exhaust unit 3, the air intake unit 2 introduces gas into the chamber 1, and the gas passes through the air intake unit 2, the chamber 1, and the exhaust unit 3 in sequence. The original impurity gas in the chamber 1 can be discharged through the exhaust mode;

[0025] Circulation mode: the chamber 1 is connected to the circulation unit 4, and the air inlet unit 2 does not introduce gas into the chamber 1. The gas in the chamber 1 passes through the chamber 1-circulation unit 4-chamber 1 in sequence and circulates in this way. When the gas passes through the impurity removal module 41 in the circulation unit 4, the impurity removal module 41 will adsorb impurities on the inert gas. That is, the circulation mode allows the inert gas to circulate through the impurity removal module 41 for impurity removal and purification;

[0026] Reduction mode: the exhaust pipe 42 is connected to the outside, and the air intake unit 2 continuously introduces gas into the chamber 1. The impurities adsorbed by the impurity removal module 41 are discharged from the exhaust pipe 42 through the reduction mode, so that the impurity removal module 41 can be reused;

[0027] Specifically, the original impurity gas in the chamber 1 can be discharged through the exhaust mode, and then the gas can be passed through the chamber 1-circulation unit 4-chamber 1 in sequence through the circulation mode, and circulated in this way, thereby removing impurities and purifying the gas multiple times, and finally through the reduction mode, the impurities adsorbed on the impurity removal module 41 are purged by continuously introducing gas through the air intake unit 2, and discharged through the exhaust pipe 42. In particular, the impurity removal module 41 can be restored to its original state by heating, thereby realizing the reuse of the impurity removal module 41.

[0028] Preferably, the inlet of the circulation unit 4 is connected to the exhaust unit 3 ; and the outlet of the circulation unit 4 is connected to the intake unit 2 .

[0029] In this embodiment, the inlet of the circulation unit 4 is connected to the exhaust unit 3, which is beneficial to the switching between the exhaust mode and the circulation mode, and the outlet of the circulation unit 4 is connected to the air intake unit 2, which is beneficial to the switching between the circulation mode and the reduction mode.

[0030] Furthermore, the circulation unit 4 and the exhaust unit 3 , and the circulation unit 4 and the air intake unit 2 are each independently switched on and off by a control valve or a three-way valve 5 .

[0031] In the above design, the on-off function achieved by the control valve or the three-way valve 5 can help the staff to control the switching of the three modes. In particular, in the circulation mode or after the circulation mode ends, the circulation unit 4 and the exhaust unit 3 can be connected through the three-way valve 5, so as to facilitate the staff to sample the gas and detect the gas purity, thereby providing a basis for the staff to shorten or extend the working time of the circulation mode.

[0032] Furthermore, the circulation unit 4 and the exhaust unit 3 are connected and disconnected by a three-way valve 5, and the circulation unit 4 is provided with a circulation valve 43; the air intake unit 2 is provided with an air intake valve 21, the circulation unit 4 and the air intake unit 2 are connected by a three-way pipe, and are connected and disconnected by the circulation valve 43, and the air intake unit 2 and the chamber 1 are connected and disconnected by the air intake valve 21.

[0033] In this embodiment, the inlet of the circulation unit 4 and the exhaust unit 3 are connected and disconnected by the three-way valve 5, and the outlet of the circulation unit 4 and the air intake unit 2 are connected and disconnected by the circulation valve 43. Specifically, in the exhaust mode, the three-way valve 5 connects the chamber 1 and the outside, and one end of the circulation unit 4 is in a closed state, and the circulation valve 43 is also in a closed state; in the circulation mode, the exhaust unit 3 is connected to the inlet of the circulation unit 4 through the three-way valve 5, and the circulation valve 43 is in an open state. At this time, the air intake unit 2 no longer ventilates the chamber 1; in the reduction mode, unlike the circulation mode, the air intake unit 2 ventilates the chamber 1, and the exhaust pipe 42 is connected to the outside. By independently controlling the on-off state, the staff can conveniently control the switching of the three modes.

[0034] Furthermore, the exhaust unit 3 includes an exhaust pipe 31 connected to the chamber 1 , an exhaust valve 32 connected to the exhaust pipe 31 , and the three-way valve 5 is located between the exhaust valve 32 and the chamber 1 .

[0035] Through the above design, the exhaust unit 3 can be controlled to exhaust outwards through the exhaust valve 32. In the exhaust mode, when the air pressure in the chamber 1 is lower than the external air pressure at the beginning, the exhaust valve 32 is in a closed state. At this time, the air intake unit 2 continues to introduce gas until the air pressure in the chamber 1 is higher than the external air pressure. The exhaust valve 32 is in an open state to discharge the impurity gas in the chamber 1. On the other hand, when gas sampling is required, sampling can be carried out by controlling the opening degree of the exhaust valve 32. The setting of the exhaust valve 32 is conducive to the normal operation of the exhaust mode and provides controllability.

[0036] Preferably, the circulation unit 4 includes a circulation pipe 44 and a circulation pump 45. The impurity removal module 41, the circulation pump 45 and the circulation valve 43 are arranged on the circulation pipe 44 along the gas flow direction. The discharge pipe 42 is located between the circulation pump 45 and the circulation valve 43. The inlet end of the circulation pipe 44 is connected to the three-way valve 5, and the outlet end of the circulation pipe 44 and the air intake unit 2 are connected through a three-way pipe.

[0037] In the above design, the discharge pipe 42 is connected to the outside only in the reduction mode. In the reduction mode, the impurities adsorbed by the impurity removal module 41 are easily discharged from the discharge pipe 42 under the action of the circulation pump 45. If it is located between the circulation pump 45 and the impurity removal module 41, it is easy to be pumped into the outlet end of the circulation pipe 44 by the circulation pump 45 and cannot be discharged normally. If it is located between the circulation valve 43 and the outlet end of the circulation pipe 44, it is easy to remain in the circulation pipe 44 and cannot be discharged in time. It should be noted that a discharge valve 421 is provided on the discharge pipe 42 to control the connection and disconnection of the discharge pipe 42 with the outside.

[0038] Furthermore, the air intake unit 2 includes an air intake pipe 22 , an air intake valve 21 is connected to the air intake pipe 22 , and a circulation pipe 44 is connected between the air intake valve 21 and the chamber 1 .

[0039] In this embodiment, the air intake valve 21 can control the air intake unit 2 to pass gas into the chamber 1. In the circulation mode, the air intake valve 21 is in a closed state and gas cannot be passed into the chamber 1. Disposing the circulation pipe 44 between the air intake valve 21 and the chamber 1 can prevent the air intake valve 21 from blocking the gas in the circulation pipe 44 from entering the chamber 1 in the circulation mode.

[0040] Preferably, a filter 23 for drying gas and removing oxygen is provided on the air intake unit 2 , and the filter 23 is located between the circulation pipe 44 and the chamber 1 .

[0041] In the above design, in the exhaust mode, the filter 23 can pre-filter the gas introduced into the air intake unit 2; in the circulation mode, the filter 23 can filter the circulating gas multiple times, thereby increasing the dryness of the gas and reducing the oxygen content of the gas.

[0042] More preferably, a water vapor sensor 33 and an oxygen sensor 34 are provided on the exhaust unit 3 .

[0043] In order to monitor the water content and oxygen content of the gas, the water vapor sensor 33 and the oxygen sensor 34 can provide monitoring data for the staff. In the exhaust mode and the circulation mode, the time of the exhaust mode and the circulation mode can be adjusted according to the monitoring data.

[0044] More preferably, the chamber 1 is provided with a gas sensor 11 for detecting impurities and a pressure sensor 12 for detecting the air pressure in the chamber 1 .

[0045] In order to monitor the impurities and air pressure in the chamber 1, the gas sensor 11 and the pressure sensor 12 are used to monitor and obtain data. It should be noted that the gas sensor 11 can be set according to different working environments and the gas conditions in the chamber 1, and the pressure sensor 12 can monitor the pressure conditions in the chamber 1. When the pressure in the chamber 1 is greater than the external air pressure, the exhaust valve 32 is opened to exhaust the air.

[0046] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A gas control system for purifying a chamber, comprising a chamber, an air intake unit for providing gas into the chamber, an exhaust unit for exhausting the gas in the chamber, and a circulation unit for circulating the gas in the chamber, characterized in that: The circulation unit is provided with a removal module for removing impurities from the gas in the chamber based on the principle of impurity gas adsorption; the removal module is an impurity removal module with a desorption function; the circulation unit is provided with an exhaust pipe, and the desorbed gas of the removal module is discharged through the exhaust pipe.

2. The control system for purifying cabin gas according to claim 1, characterized in that: The inlet of the circulation unit is connected to the exhaust unit; and the outlet of the circulation unit is connected to the intake unit.

3. The control system for purifying cabin gas according to claim 1, characterized in that: The circulation unit and the exhaust unit, and the circulation unit and the air intake unit are each independently connected and disconnected by a control valve or a three-way valve.

4. The control system for purifying cabin gas according to claim 3, characterized in that: The circulation unit and the exhaust unit are connected and disconnected by a three-way valve, and the circulation unit is provided with a circulation valve; the air intake unit is provided with an air intake valve, the circulation unit and the air intake unit are connected by a three-way pipe, and are connected and disconnected by the circulation valve, and the air intake unit and the chamber are connected and disconnected by the air intake valve.

5. The control system for purifying cabin gas according to claim 4, characterized in that: The exhaust unit comprises an exhaust pipe connected to the chamber and an exhaust valve connected to the exhaust pipe, and the three-way valve is located between the exhaust valve and the chamber.

6. The control system for purifying cabin gas according to claim 5, characterized in that: The circulation unit includes a circulation pipe and a circulation pump. The impurity removal module, the circulation pump and the circulation valve are arranged on the circulation pipe along the gas flow direction. The discharge pipeline is located between the circulation pump and the circulation valve. The inlet end of the circulation pipe is connected to the three-way valve, and the outlet end of the circulation pipe and the air intake unit are connected through a three-way pipe.

7. The control system for purifying cabin gas according to claim 6, characterized in that: The air intake unit comprises an air intake pipeline, the air intake valve is connected to the air intake pipeline, and the circulation pipe is connected between the air intake valve and the chamber.

8. The control system for purifying cabin gas according to claim 7, characterized in that: The air inlet unit is provided with a filter for drying gas and / or deoxygenating, and the filter is located between the circulation pipe and the chamber.

9. The control system for purifying cabin gas according to claim 1, characterized in that: The exhaust unit is provided with a water vapor sensor and an oxygen sensor.

10. The control system for purifying cabin gas according to claim 1, characterized in that: The chamber is provided with a gas sensor for detecting impurities and a pressure sensor for detecting the air pressure of the chamber.

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