Dynamic odor sniffing device

Abstract

The utility model discloses a stink dynamic sniffing device which comprises an oil-free air compressor, an air purification device, a dynamic dilution host and a sniffing position, the air purification device comprises an air purification device air inlet nozzle and an air purification device air outlet nozzle, and the air purification device air inlet nozzle is connected with the oil-free air compressor; a six-position air outlet nozzle, a sample air inlet nozzle and a purified air inlet nozzle are arranged on the back surface of the dynamic dilution main machine; the purified air inlet nozzle is connected with the air purifying device air outlet nozzle through a hose; the sniffing position is provided with three sniffing ports, and each sniffing port is communicated with a passage of a six-position air outlet nozzle of the dynamic dilution host. The device adopts the high-precision MFC to precisely control the flow of the sample gas and uniformly mix the sample gas and clean air, realizes precise dynamic dilution of the concentration of the sample gas, solves the problems of inaccurate manual proportioning of the sample gas and tedious operation, and makes the odor sniffing detection safer, more comfortable, more sensitive, more convenient and more efficient.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental protection, and particularly relates to a dynamic odor discrimination device for malodor. Background Art

[0002] A dynamic odor discrimination device for malodor is an analytical instrument used in the fields of environmental science and technology, resource science and technology, and safety science and technology. This device is usually based on the sensory determination method and is used to measure the malodor concentration and intensity of pollution sources, as well as to evaluate the odor index (odor intensity, odor quality, disgust degree) of the surrounding air. They can provide an effective method for measuring environmental odors, especially suitable for measuring complex gas mixtures, because compared with gas chromatography-mass spectrometry, the sensory analysis method is more economical, reliable, and direct.

[0003] When discriminating the malodor of a pollution source, it is necessary to dilute the gas sample. However, the traditional method often involves manually preparing the gas sample, which is prone to inaccurate manual preparation data, affecting the discrimination of the staff, and the manual preparation operation is cumbersome, resulting in low work efficiency. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a dynamic odor discrimination device for malodor to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A dynamic odor discrimination device for malodor, comprising an oil-free air compressor, an air purification device, a dynamic dilution host, and an odor discrimination position. The air purification device includes an air purification device air inlet nozzle arranged near the bottom and an air purification device air outlet nozzle located at the top. The air purification device air inlet nozzle is connected to the oil-free air compressor;

[0006] The air purification device internally is provided with molecular sieves and coconut shell activated carbon adsorbents. The molecular sieves are located below the coconut shell activated carbon adsorbents, and the molecular sieves are isolated from the coconut shell activated carbon adsorbents by a partition board;

[0007] The back of the dynamic dilution host is provided with a power supply port, a six-way air outlet nozzle, a sample gas inlet nozzle, and a purified air inlet nozzle;

[0008] The purified air inlet nozzle is connected to the air purification device air outlet nozzle through a hose;

[0009] The sample gas inlet nozzle is connected to the gas sample to be measured;

[0010] There are 3 odor discrimination ports on the odor discrimination position, and each odor discrimination port is communicated with the passage of the six-way air outlet nozzle of the dynamic dilution host.

[0011] Preferably, the front of the dynamic dilution main unit is provided with a touch display screen for viewing, setting parameters and controlling the dilution process, a switch for controlling the power on / off of the dynamic dilution main unit, and a USB communication interface for data export and system upgrade.

[0012] Preferably, a controllable high-precision MFC is provided inside the dynamic dilution main unit, and the flux of the high-precision MFC controls the gas ratio through the touch display screen.

[0013] Preferably, the front of the odor discrimination unit is provided with an odor discrimination touch display screen, which is used to display and control the opening and closing of three odor discrimination ports on the odor discrimination unit.

[0014] Preferably, there are six odor discrimination units in total, and they are wirelessly connected to the dynamic dilution main unit.

[0015] Preferably, the six-way gas outlet nozzle has 18 interfaces in six ways, which are respectively connected to the interfaces of 6 odor discrimination units.

[0016] Compared with the prior art, the beneficial effects of the present utility model are:

[0017] The present utility model provides compressed air through an oil-free air compressor. The compressed air is purified by an air purification device to obtain clean and odorless clean air. The clean air is connected to the purified air inlet nozzle through a pipeline, and the sample gas is connected to the sample gas inlet nozzle through a pipeline. The high-precision MFC is controlled through the touch display screen and the dynamic dilution ratio is displayed to complete the process of step-by-step dilution. The diluted and mixed gas reaches the odor discrimination unit through the pipeline between the six-way gas outlet nozzle and the odor discrimination unit. The odor discriminator controls the opening and closing of the odor discrimination ports by controlling the odor discrimination touch display screen, judges the odor discrimination threshold, and completes the odor discrimination experiment;

[0018] This device uses a high-precision MFC to accurately control the flow rate of the sample gas, uniformly mix the sample gas and the clean air, realizes the accurate dynamic dilution of the sample gas concentration, solves the problems of inaccurate manual ratio of the sample gas and cumbersome operation, and makes the odor discrimination detection of odors safer, more comfortable, sensitive, convenient and efficient. Description of the Drawings

[0019] Figure 1 It is a schematic flow chart of the present utility model;

[0020] Figure 2 It is a schematic structural diagram of the air purification device of the present utility model;

[0021] Figure 3 It is a schematic front structural diagram of the dynamic dilution main unit of the present utility model;

[0022] Figure 4 It is a schematic back structural diagram of the dynamic dilution main unit of the present utility model;

[0023] Figure 5 Schematic diagram of the internal structure of the dynamic dilution mainframe of the present utility model;

[0024] Figure 6 Schematic diagram of the odor discrimination position structure of the present utility model.

[0025] In the figure: 1, oil-free air compressor; 2, air purification device; 3, air purification device air outlet nozzle; 4, coconut shell activated carbon adsorbent; 5, molecular sieve; 6, partition board; 7, air purification device air inlet nozzle; 8, dynamic dilution mainframe; 9, touch display screen; 10, switch; 11, USB communication interface; 12, power supply port; 13, six-way air outlet nozzle; 14, sample gas inlet nozzle; 15, purified air inlet nozzle; 16, high-precision MFC; 17, odor discrimination position; 18, odor discrimination port; 19, odor discrimination position touch display screen. Specific embodiments

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0027] Please refer to Figure 1-6 , the present utility model provides a technical solution: a malodor dynamic odor discrimination device, including an oil-free air compressor 1, an air purification device 2, a dynamic dilution mainframe 8 and an odor discrimination position 17. The air purification device 2 includes an air purification device air inlet nozzle 7 arranged near the bottom and an air purification device air outlet nozzle 3 located at the top. The air purification device air inlet nozzle 7 is connected to the oil-free air compressor 1;

[0028] The air purification device 2 is internally provided with a molecular sieve 5 and a coconut shell activated carbon adsorbent 4. The molecular sieve 5 is located below the coconut shell activated carbon adsorbent 4, and the molecular sieve 5 is separated from the coconut shell activated carbon adsorbent 4 by a partition board 6.

[0029] The oil-free air compressor 1 provides pollution-free compressed air, which enters the air purification device 2 through the air purification device air inlet nozzle 7 by a pipeline. The gas sequentially passes through the partition board 6, the molecular sieve 5, the partition board 6, and the coconut shell activated carbon adsorbent 4, and then is ejected from the air purification device air outlet nozzle 3, and clean and odorless clean air can be obtained. The air purification device air outlet nozzle 3 is connected to the purified air inlet nozzle 15 by a pollution-free polytetrafluoroethylene tube.

[0030] The back of the dynamic dilution mainframe 8 is provided with a power supply port 12, a six-way air outlet nozzle 13, a sample gas inlet nozzle 14 and a purified air inlet nozzle 15;

[0031] The purified air inlet nozzle 15 is connected to the air outlet nozzle 3 of the air purification device through a hose;

[0032] The sample gas inlet nozzle 14 is connected to the sample gas to be measured;

[0033] On the front of the dynamic dilution main unit 8, there is a touch display screen 9 for viewing, setting parameters and controlling the dilution process, a switch 10 for controlling the power on and off of the dynamic dilution main unit 8, and a USB communication interface 11 for data export and system upgrade;

[0034] Inside the dynamic dilution main unit 8, there is a controllable high-precision MFC 16, and the flux of the high-precision MFC 16 controls the gas ratio through the touch display screen 9;

[0035] The six-way outlet nozzle 13 has six positions with 18 interfaces, which are respectively connected to the interfaces of 6 smelling positions 17.

[0036] There are 3 smelling ports 18 on the smelling position 17, and each smelling port 18 is connected to the passage of the six-way outlet nozzle 13 of the dynamic dilution main unit 8;

[0037] On the front of the smelling position 17, there is a smelling position touch display screen 19, and the smelling position touch display screen 19 is used to display and control the opening and closing of the 3 smelling ports 18 on the smelling position 17;

[0038] There are a total of 6 smelling positions 17, and they are wirelessly connected to the dynamic dilution main unit 8.

[0039] During operation, the oil-free air compressor 1 provides compressed air. The compressed air is purified by the air purification device 2 to obtain clean and odorless clean air. The clean air is connected to the purified air inlet nozzle 15 through a pipeline. The sample gas is connected to the sample gas inlet nozzle 14 through a pipeline. The high-precision MFC 16 is controlled through the touch display screen 9 and the dynamic dilution ratio is displayed to complete the process of step-by-step dilution. The diluted and mixed gas reaches the smelling position 17 through the pipeline between the six-way outlet nozzle 13 and the smelling position 17. The smelling operator controls the opening and closing of the smelling port 18 by controlling the smelling position touch display screen 19, judges the smelling threshold, and completes the smelling experiment.

[0040] The working principle and usage process of the present utility model:

[0041] During operation, the oil-free air compressor 1 supplies compressed air. The compressed air is purified by the air purification device 2 to obtain clean and odorless air. The clean air is connected to the purified air inlet nozzle 15 through a pipeline. The sample gas is connected to the sample gas inlet nozzle 14 through a pipeline. The high-precision MFC 16 is controlled by the touch display screen 9 and the dynamic dilution ratio is displayed to complete the process of step-by-step dilution. The diluted and mixed gas reaches the olfactometry position 17 through the pipeline between the six-way outlet nozzle 13 and the olfactometry position 17. The olfactometer controls the opening and closing of the olfactometry port 18 by controlling the touch display screen 19 of the olfactometry position, judges the olfactometry threshold, and completes the olfactometry experiment.

[0042] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood 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 dynamic odor olfactory device, comprising an oil-free air compressor (1), an air purification device (2), a dynamic dilution host (8) and an odor identification station (17), characterized in that: The air purification device (2) comprises an air purification device air inlet nozzle (7) arranged near the bottom and an air purification device air outlet nozzle (3) located at the top, and the air purification device air inlet nozzle (7) is connected to the oil-free air compressor (1); The air purification device (2) is provided with a molecular sieve (5) and a coconut shell activated carbon adsorbent (4) inside, the molecular sieve (5) is located below the coconut shell activated carbon adsorbent (4), and the molecular sieve (5) is isolated from the coconut shell activated carbon adsorbent (4) by a partition (6); The back of the dynamic dilution host (8) is provided with a power supply port (12), a six-position air outlet nozzle (13), a sample air inlet nozzle (14) and a purified air inlet nozzle (15); The purified air inlet nozzle (15) is connected to the air outlet nozzle (3) of the air purification device via a hose; The sample gas inlet nozzle (14) is connected to the sample gas to be tested; The olfactory position (17) is provided with three olfactory ports (18), and each of the olfactory ports (18) is connected to a passage of six air outlet nozzles (13) of the dynamic dilution host (8).

2. A malodor dynamic olfactory identification device according to claim 1, characterized in that: The front of the dynamic dilution host (8) is provided with a touch display screen (9) for viewing and setting parameters and controlling the dilution process, a switch (10) for controlling the power on and off of the dynamic dilution host (8), and a USB communication interface (11) for exporting data and upgrading the system.

3. A malodor dynamic olfactory identification device according to claim 1, characterized in that: A controllable high-precision MFC (16) is provided inside the dynamic dilution host (8), and the flux of the high-precision MFC (16) is controlled by a touch display screen (9) to control the gas ratio.

4. The malodor dynamic olfactory identification device according to claim 1, characterized in that: The front of the olfactory identification position (17) is provided with an olfactory identification position touch display screen (19), and the olfactory identification position touch display screen (19) is used to display and control the opening and closing of three olfactory identification ports (18) on the olfactory identification position (17).

5. The malodor dynamic olfactory identification device according to claim 1, characterized in that: There are 6 olfactory identification positions (17) in total, and they are wirelessly connected to the dynamic dilution host (8).

6. A malodor dynamic olfactory device according to claim 5, characterized in that: The six-position air outlet nozzle (13) has six positions and 18 interfaces, which are respectively connected to the interfaces of the six olfactory identification positions (17).

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