Zeroing structure device for infrared analysis of gas

Abstract

The utility model relates to a gas analysis instrument, and discloses a return-to-zero structure device for infrared gas analysis, which comprises a shell, and a gas inlet, an infrared gas reaction chamber, a gas extraction and sampling gas pump, a return-to-zero gas pump, a return-to-zero gas generator and a gas outlet are sequentially arranged on the front side of the shell from top to bottom. The gas inlet and the gas outlet are respectively communicated with the top end and the bottom end of the infrared gas reaction chamber through pipelines, a gas extraction sampling gas pump and a zeroing gas pump are arranged on the pipelines, the infrared gas reaction chamber is also provided with an infrared light-emitting tube, a detector and a temperature control unit, and different gas components are analyzed by utilizing different infrared wavelengths emitted by the infrared light-emitting tube. According to the utility model, two gas pumps are designed, one gas pump is used for extracting gas for analysis, the other gas pump is used for generating standard gas through the zero gas generator after analysis is completed, and the measured gas is reversely emptied through the zero gas pump, so that the gas is ensured to return to zero, the gas is ensured to be more stable, and the circuit design is simplified; the stability of infrared measurement gas concentration is ensured, and the cost performance is high.

Description

Technical Field

[0001] The utility model relates to the field of gas analysis instruments, in particular to a zeroing structure device for infrared gas analysis. Background Technique

[0002] The new infrared gas component concentration analyzer is an advanced instrument for quickly measuring the concentration of gas components, which is usually used in the fields of medical industry, industry, environmental monitoring, chemical analysis and safety applications. Especially in the medical industry, infrared analysis technology is often used to measure and analyze the concentration of gas components to monitor the physiological conditions of patients, the concentration of gas anesthetic drugs, the oxygen and carbon dioxide concentrations of respiratory gases. Or in the transportation industry, it is used to detect the alcohol gas concentration of drivers in vehicles to prevent drunk driving during driving. This device uses infrared spectroscopy technology to analyze the concentration of components in the gas, and has the characteristics of high precision, fast response and non-invasiveness.

[0003] At present, the new infrared gas component concentration analyzer has the following disadvantages in the market:

[0004] (1) Existing devices require a set of reference signals when analyzing the concentration of infrared analysis gases. Among them, two or more different light sources are selected for the reference signal analysis, which undoubtedly increases the system design complexity and cost;

[0005] (2) Another device uses ambient air as the zero reference. Most designs use a gas pump to extract an appropriate amount of gas into the reaction chamber for analysis. After the analysis is completed, air (non-measured gas is used as the reference) is extracted from the same air inlet. At this time, there may be residues in the extracted gas, and there may also be remaining unremoved measured gas molecules in the environment, resulting in a false zeroing phenomenon, which easily causes the measured gas to be affected by the unremoved gas molecules in the next analysis, making the result inaccurate. In view of this, a zeroing structure device for infrared analysis gas is proposed from a practical perspective. Content of the Utility Model

[0006] The purpose of the utility model is to provide a zeroing structure device for infrared analysis gas to solve the problems raised in the above background technique.

[0007] To achieve the above purpose, the utility model provides the following technical solutions:

[0008] An infrared gas analysis zeroing structure device, including a housing, is characterized in that an air inlet, an infrared gas reaction chamber, a sampling air pump, a zeroing air pump, a zeroing gas generator and an air outlet are successively arranged on the front of the housing from top to bottom. The air inlet and the air outlet are respectively communicated with the top end and the bottom end of the infrared gas reaction chamber through pipelines. The pipelines are provided with the sampling air pump and the zeroing air pump. The infrared gas reaction chamber is also provided with an infrared light-emitting tube, a detector and a temperature control unit, and different gas components are analyzed by using the infrared light-emitting tube to emit different infrared wavelengths.

[0009] Preferably, it further includes a flow sensor, and the flow sensor is located on the pipeline below the air inlet.

[0010] Preferably, there are two air outlets, which are respectively located at the tail of the air inlet and the tail of the sampling air pump.

[0011] Preferably, a battery is further arranged at the lower end inside the housing.

[0012] Preferably, a PCBA board is further arranged inside the housing.

[0013] Preferably, a display screen and a key are further installed on the surface of the housing, and the display screen and the key are electrically connected to the battery and the PCBA board.

[0014] Preferably, the sampling air pump is used to extract the gas to be analyzed, and the extracted gas to be analyzed is transported into the infrared gas reaction chamber through the pipeline.

[0015] Preferably, the zeroing air pump is used to empty and zero the gas in the infrared gas reaction chamber.

[0016] The beneficial effects of the present utility model:

[0017] By designing two-way air pumps in the present utility model, one way is used to extract an appropriate amount of gas into the infrared gas reaction chamber for analyzing and measuring the gas concentration and components. After the analysis is completed, the other zeroing air pump generates a standard gas (a gas without gas molecules to be measured) through the zeroing gas generator, and reversely empties the gas to be measured in the reaction chamber through the zeroing air pump to ensure that the gas in the reaction chamber is zeroed, thereby ensuring that the reference gas is more stable and reliable, and simplifying the circuit design to achieve low cost, ensuring the stability of infrared measurement of gas concentration, and having a high cost performance. Description of the drawings

[0018] Figure 1 It is a side view and a partial enlarged view of the present utility model;

[0019] Figure 2 It is a front view of the present utility model;

[0020] Reference numerals: 1, air inlet; 2, infrared gas reaction chamber; 3, air sampling pump; 4, zero gas pump; 5, zero gas generator; 6, battery; 7, flow sensor; 8, display screen; 9, PCBA board; 10, button; 11, housing; 12, infrared light-emitting diode; 13, detector; 14, temperature control unit. Detailed implementation manners

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "vertical", "upper", "lower", "horizontal", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0023] In the description of the present invention, it should also be noted that unless otherwise clearly defined and limited, the terms "set", "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0024] Please refer to Figure 1 - Figure 2 , Figure 1 - Figure 2 which schematically shows a zeroing structure device for infrared gas analysis according to the present invention.

[0025] In the embodiment of the present invention, a zeroing structure device applied to infrared gas analysis includes a housing 11. It is characterized in that an air inlet 1, an infrared gas reaction chamber 2, an air sampling pump 3, a zero gas pump 4, a zero gas generator 5, and an air outlet are sequentially arranged on the front surface of the housing 11 from top to bottom. The air inlet 1 and the air outlet are respectively communicated with the top end and the bottom end of the infrared gas reaction chamber 2 through pipelines. The pipelines are provided with the air sampling pump 3 and the zero gas pump 4. The infrared gas reaction chamber 2 is also provided with an infrared light-emitting diode 12, a detector 13, and a temperature control unit 14, and different gas components are analyzed by using the infrared light-emitting diode 12 to emit different infrared wavelengths.

[0026] Among them, the gas to be measured enters from the air inlet 1. Under the action of the air sampling pump 3, the gas to be measured is extracted through a pipeline into the infrared gas reaction chamber 2.

[0027] Among them, the infrared light-emitting diodes 12 in the infrared gas reaction chamber 2 emit different infrared wavelengths to facilitate the analysis of different gas components, such as alcohol, oxygen, carbon dioxide, methane, etc.

[0028] Among them, a standard gas is generated in the zero gas generator 5. The measured gas in the infrared gas reaction chamber 2 is emptied reversely through the zero gas pump 4, so as to ensure that the gas in the infrared gas reaction chamber 2 is emptied.

[0029] Among them, a molecular sieve is adopted in the zero gas reactor 5, and the gas mixture is separated by utilizing the difference in the "adsorption" performance of the molecular sieve for different gas molecules.

[0030] Among them, the adsorbent in the molecular sieve has a limited adsorption capacity. After adsorbing a certain kind of molecule to saturation, it is necessary to remove the adsorbed molecule before the adsorption capacity can be restored. The utility model adopts heating or pressurized purging for regeneration to achieve the effect of repeated use.

[0031] Among them, the zero gas reactor 5 empties the gas in the device, and it is required that the emptied gas does not contain the gas components to be tested or the gas that interferes with the sampling of the next test.

[0032] Further, it further includes a flow sensor 7, and the flow sensor 7 is located on the pipeline below the air inlet 1.

[0033] Further, there are two air outlets, which are respectively located at the tail of the air inlet 1 and the tail of the air sampling pump 3.

[0034] Further, a battery 6 is also provided at the lower end inside the housing 11.

[0035] Further, a PCBA board 9 is also provided inside the housing 11.

[0036] Further, a display screen 8 and a key 10 are also installed on the surface of the housing 11, and the display screen 8 and the key 10 are electrically connected to the battery 6 and the PCBA board 9.

[0037] Among them, after the gas to be measured is analyzed in the infrared gas reaction chamber, it is converted into different strengths of current, and the current signal is processed by the PCBA board 9, then the gas concentration value can be calculated and reflected on the display screen 8.

[0038] Further, the air sampling pump 3 is used to extract the gas to be analyzed, and the extracted gas to be analyzed is transported into the infrared gas reaction chamber 2 through a pipeline.

[0039] Furthermore, the zeroing air pump 4 is used to evacuate and zero the gas in the infrared gas reaction chamber 2.

[0040] Advantages of the present utility model:

[0041] By designing two air pumps in the present utility model, one is used to extract an appropriate amount of gas into the infrared gas reaction chamber 2 for analyzing and measuring the gas concentration and components. After the analysis is completed, the other zeroing air pump 4 generates a standard gas (a gas without gas molecules to be measured) through the zeroing gas generator 5, and reversely evacuates the gas to be measured in the reaction chamber through the zeroing air pump 4, so as to ensure that the gas in the reaction chamber is zeroed, thereby ensuring that the reference gas is more stable and reliable, simplifying the complexity of the circuit design and having a low cost, ensuring the stability of infrared measurement of gas concentration, and having a high cost performance.

[0042] Working principle of the present utility model:

[0043] The air pump 3 for pumping and sampling first extracts an appropriate amount of the gas to be tested into the infrared gas reaction chamber 2. The gas to be tested enters from the air inlet 1, and the excess gas is discharged from the tail of the air inlet 1 and the tail of the air pump 3 for pumping and sampling.

[0044] After sampling an appropriate amount of gas, the air pump 3 for pumping and sampling stops working. The infrared light-emitting diode 12 irradiates the gas in the reaction chamber 2. Since the concentrations of different gases to be measured have different infrared absorption strengths, different strong and weak currents are formed at the detector 13 end. The current signal is processed by the PCBA board 9 (main board signal processing and control unit) 9 to measure the concentration value of the gas to be measured.

[0045] After the analysis is completed, since there are still gas components to be measured in the infrared gas reaction chamber 2, it is necessary to completely remove the gas components in the pipeline or the gas chamber to ensure that the next measurement is not affected by the residual gas.

[0046] Through the zeroing air pump 4 and the zeroing gas generator 5, the zeroing gas generator 5 generates a standard gas (a gas without gas molecules to be measured), and reversely evacuates the gas to be measured in the reaction chamber through the zeroing air pump 4, so as to ensure that the gas in the reaction chamber is zeroed.

[0047] After zeroing is completed, the zeroing air pump 4 stops working. The molecular sieve of the zeroing gas generator 5 can be regenerated by heating to ensure that there is a continuous and reliable standard gas for the next time.

[0048] It should be noted that in this text, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0049] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A zeroing structure device for infrared analysis of gas, comprising a housing, characterized in that: The front side of the shell is provided with an air inlet, an infrared gas reaction chamber, an air sampling air pump, a zeroing air pump, a zeroing gas generator and an air outlet in sequence from top to bottom. The air inlet and the air outlet are respectively connected to the top and bottom ends of the infrared gas reaction chamber through pipelines. The air sampling air pump and the zeroing air pump are provided on the pipeline. The infrared gas reaction chamber is also provided with an infrared light-emitting tube, a detector and a temperature control unit. The infrared light-emitting tube is used to emit different infrared wavelengths to analyze different gas components.

2. The zeroing structure device for infrared analysis of gas according to claim 1, characterized in that: A flow sensor is also included, and the flow sensor is located on the pipeline below the air inlet.

3. The zeroing structure device for infrared analysis of gas according to claim 2, characterized in that: The air outlets are provided with two, which are respectively located at the tail of the air inlet and the tail of the air extraction and sampling air pump.

4. The zeroing structure device for infrared analysis of gas according to claim 3, characterized in that: A battery is also arranged at the lower end of the shell.

5. The zeroing structure device for infrared analysis of gas according to claim 4, characterized in that: A PCBA board is also arranged inside the shell.

6. The zeroing structure device for infrared analysis of gas according to claim 5, characterized in that: A display screen and buttons are also installed on the surface of the shell, and the display screen, the buttons, the battery and the PCBA board are electrically connected.

7. The zeroing structure device for infrared analysis of gas according to claim 1, characterized in that: The gas sampling pump is used to extract the gas to be analyzed, and transport the extracted gas to be analyzed into the infrared gas reaction chamber through the pipeline.

8. The zeroing structure device for infrared analysis of gas according to claim 1, characterized in that: The zeroing gas pump is used to evacuate the gas in the infrared gas reaction chamber and return it to zero.

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