A volatile organic compound monitor

Abstract

This invention provides a volatile organic compound (VOC) monitor that uses a spiral plate inside the housing and a bottom fan to form a forced convection heated airflow. The airflow is then focused onto the detection sensor by a guide shroud, solving the technical problems of low efficiency in traditional water bath heating and large detection errors due to natural diffusion.

Description

Technical Field

[0001] This utility model relates to the field of environmental monitoring equipment technology, and more specifically, to a device for accurately monitoring the volatilization rate of volatile organic compounds (VOCs) through forced convection heating and flow focusing technology. Background Technology

[0002] When using volatile organic compound (VOC) volatilization detection devices, it is not possible to effectively detect the volatilization effect of organic compounds under different temperature conditions, the detection data is not comprehensive enough, and its use has certain limitations.

[0003] A search of Chinese patent CN221860395U reveals a device for monitoring the volatilization effect of volatile organic compounds (VOCs). This device involves placing the organic compound to be tested in a container, where a sensor detects the compound, and the results are displayed on a screen. By reading the data displayed on the screen, the device effectively measures the volatilization rate of the organic compound. It includes a heating structure; after the organic compound is placed, a controller activates the heater, raising the water temperature in the storage tank and thus increasing the internal temperature of the device. The sensor reads the data displayed on the screen to establish the relationship between the volatilization rate of the VOCs and the temperature, thereby comprehensively monitoring the impact of temperature on the volatilization rate of organic compounds.

[0004] Regarding the aforementioned technologies, the inventors believe that the following drawbacks exist: heating by water is too slow, which can easily cause the organic matter to remain in the test for a long time, affecting the detection data. Furthermore, the natural diffusion of volatile organic matter can easily lead to missed detection, resulting in inaccurate test results and reducing the efficiency of the volatile organic compound monitor. Summary of the Invention

[0005] The existing technology mentioned above uses water heating, which is too slow and can cause the organic matter to remain in the test for a long time, affecting the detection data. In addition, the natural diffusion of volatile organic matter can easily lead to missed detection, resulting in inaccurate detection results. Therefore, a volatile organic compound monitor is provided.

[0006] The technical means adopted in this utility model are as follows:

[0007] A volatile organic compound (VOC) monitor includes a housing and further includes:

[0008] A spiral plate is fixedly connected to the inner wall of the shell, and an inner cylinder is fixedly connected to the inner wall of the spiral plate;

[0009] A sliding frame is slidably connected to the slide rail at the bottom of the housing. The top of the sliding frame is provided with a container, and the bottom is provided with ventilation holes arranged in a ring array.

[0010] The fan and the heating element at the bottom of the housing are installed inside the sliding frame, and the fan and the ventilation hole form a forced convection heating channel;

[0011] The mounting bracket fixed to the side wall of the inner cylinder has a detection sensor and a conical flow guide at its bottom, with the flow guide located directly above the container.

[0012] This technical solution uses a spiral plate and a fan to create forced convection, which shortens the heating time, and the guide shroud improves the detection accuracy.

[0013] Furthermore, a sealing plate is fixed to the top of the sliding frame, and a sealing hole adapted to the size of the sealing plate is opened at the bottom of the inner cylinder, forming a dynamic sealing structure.

[0014] This technical solution uses a dynamic fit between the sealing plate and the sealing hole to achieve closed-loop control of airflow during the heating and detection process.

[0015] Furthermore, the top of the housing is provided with a slidable filter plate, which is slidably connected to the top of the inner cylinder, and the top is provided with an ultraviolet lamp.

[0016] This technical solution uses ultraviolet lamps in conjunction with replaceable filter plates to control secondary pollution, and the sliding connection of the filter plates facilitates maintenance.

[0017] Furthermore, the fan has an adjustable power mode (1m / s≤control airflow velocity≤2m / s): during the heating phase, it operates at full power to form a spiral airflow channel; during the detection phase, it operates at reduced speed to control the airflow velocity to ≤1.5m / s.

[0018] This technical solution ensures airflow speed by operating at full power during the heating phase and limits the speed to ≤1.5m / s during the detection phase to avoid sensor interference.

[0019] Furthermore, the bottom of the housing is provided with an inlet and outlet and a hinged opening and closing plate, and the sliding frame is loaded and unloaded by pulling through the gripping groove.

[0020] This technical solution uses a pull-out sliding frame to enable quick sample changes, and the hinged design of the opening and closing plate prevents parts from being lost.

[0021] This utility model provides an improved volatile organic compound (VOC) monitor, which has the following improvements and advantages compared with the prior art:

[0022] Firstly, this utility model comprises a shell, a sliding frame, a container, a spiral plate, an inner cylinder, a detection sensor, and a fan. The fan blows air downwards while simultaneously activating the heating element at the bottom of the shell. The flowing air is heated and enters the inner cylinder through the ventilation holes at the bottom of the sliding frame. After exiting through the top of the inner cylinder, it descends through the spiral channel formed by the spiral plate and the inner cylinder. During heating, the airflow is accelerated, thereby quickly heating the volatile environment of the inner cylinder to the specified temperature. The heating is rapid and uniform. During detection, the fan power is reduced, thereby reducing the airflow. The volatile organic compounds are carried upwards by the slowly flowing air and monitored by the detection sensor at the bottom of the mounting frame. The fan carries the internal air in a circulating manner, achieving the purpose of rapid and uniform heating. Furthermore, the slowly flowing air during detection also helps the volatile organic compounds to be detected more accurately by the detection sensor, improving the efficiency of the volatile organic compound monitor.

[0023] Secondly, this utility model, by setting up a mounting frame and a flow guide, with the flow guide set at the bottom of the mounting frame, directs the volatilization of organic matter more concentratedly to the detection sensor, resulting in more accurate detection data and improving the practicality of the volatile organic compound monitor. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic cross-sectional view of the overall structure of this utility model;

[0026] Figure 2 This is a schematic cross-sectional view of the inner cylinder structure of this utility model;

[0027] Figure 3 This is the utility model Figure 2 Enlarged schematic diagram of structure A in the middle;

[0028] Figure 4 This is a schematic diagram of the sliding frame of this utility model.

[0029] In the diagram: 1. Shell; 2. Opening plate; 3. Sliding frame; 4. Sealing plate; 5. Fan; 6. Heating element; 7. Display; 8. Ultraviolet lamp; 9. Inner cylinder; 10. Sliding plate; 11. Filter plate; 12. Spiral plate; 13. Mounting bracket; 14. Detection sensor; 15. Container; 16. Ventilation hole; 17. Flow guide. Detailed Implementation

[0030] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0032] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0033] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0034] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0035] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0036] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0037] like Figures 1 to 4 As shown, this utility model provides a volatile organic compound (VOC) monitor, including a housing 1 and a monitoring mechanism disposed inside the housing 1.

[0038] The monitoring mechanism includes a spiral plate 12 fixedly connected to the inner wall of the housing 1, an inner cylinder 9 fixedly connected to the inner wall of the spiral plate 12, a slide rail provided on the bottom inner wall of the housing 1, a sliding frame 3 slidably connected to the inner wall of the slide rail, a container 15 provided on the top outer wall of the sliding frame 3, a fan 5 installed on one side inner wall of the sliding frame 3, a heating element 6 installed on the bottom inner wall of the housing 1, several ventilation holes 16 opened on the bottom outer wall of the sliding frame 3, a fixing hole opened on one side outer wall of the inner cylinder 9, a mounting frame 13 fixedly connected to the inner wall of the fixing hole, a detection sensor 14 installed on the bottom outer wall of the mounting frame 13, a connection hole opened on one side outer wall of the top of the housing 1, a sliding plate 10 slidably connected to the inner wall of the connection hole, and a filter plate 11 fixedly connected to one side outer wall of the sliding plate 10.

[0039] Furthermore, the filter plate 11 is slidably connected to the outer wall of the top of the inner cylinder 9, and the size of the filter plate 11 is adapted to the inner cylinder 9. An ultraviolet lamp 8 is installed on the top inner wall of the shell 1, and a sealing hole is opened on the bottom outer wall of the inner cylinder 9. A sealing plate 4 is fixedly connected to the top outer wall of the sliding frame 3, and the size of the sealing plate 4 is adapted to the sealing hole.

[0040] Furthermore, the outer wall of the sliding frame 3 is provided with a gripping groove, and the ventilation holes 16 are distributed in a ring array. The ventilation holes 16 are adapted to the size of the inner cylinder 9. The bottom outer wall of the shell 1 is provided with an inlet and outlet. The outer walls of the inlet and outlet are connected to the opening and closing plates 2 by hinges. The sliding frame 3 and the fan 5 are adapted to the size of the inlet and outlet. The bottom outer wall of the mounting frame 13 is fixedly connected with a flow guide 17. The flow guide 17 is set in a cone shape and is located above the container 15. A temperature controller is installed on the top inner wall of the inner cylinder 9. A display 7 is installed on the top outer wall of the shell 1. The flow guide 17 is set at the bottom of the mounting frame 13 so that the volatilization of organic matter is more concentrated and guided to the detection sensor 14, and the detection data is more accurate.

[0041] Working principle: When monitoring volatile organic compounds (VOCs), the organic matter is placed in the container 15 of the sliding frame 3. The sliding frame 3 is pushed into the inner cylinder 9 of the housing 1. The sealing plate 4 is connected and sealed to the inner cylinder 9. The opening and closing plate 2 on the housing 1 is closed. The fan 5 on the sliding frame 3 is started, and the fan 5 blows air downwards. At the same time, the heating element 6 at the bottom of the housing 1 is started. The flowing air is heated and enters the inner cylinder 9 through the ventilation hole 16 at the bottom of the sliding frame 3. After exiting through the top of the inner cylinder 9, it descends through the spiral channel formed by the spiral plate 12 and the inner cylinder 9. During heating, the airflow speed is increased. The volatile environment of the inner cylinder 9 is quickly heated to the specified temperature. The heating is rapid and uniform. During detection, the power of the fan 5 is reduced, thereby reducing the airflow. The volatile organic compounds are carried upward by the slowly flowing air and monitored by the detection sensor 14 at the bottom of the mounting frame 13. The residual volatiles in the air are filtered by the filter plate 11 to prevent them from affecting the subsequent detection of organic volatiles. The ultraviolet lamp 8 disinfects the toxic substances filtered by the filter plate 11. A guide hood 17 is set at the bottom of the mounting frame 13 so that the volatile organic compounds are more concentrated and guided to the detection sensor 14, resulting in more accurate detection data.

[0042] In this invention, the fan blows air downwards while simultaneously activating the heating element at the bottom of the housing. The flowing air is heated and enters the inner cylinder through the ventilation holes at the bottom of the sliding frame. After exiting through the top of the inner cylinder, it descends through the spiral channel formed by the spiral plate and the inner cylinder. During heating, the airflow speed is increased, thereby quickly heating the volatile environment of the inner cylinder to the specified temperature. The heating is rapid and uniform. During detection, the fan power is reduced, thereby reducing the airflow. The volatile organic compounds are carried upwards by the slowly flowing air and monitored by the detection sensor at the bottom of the mounting frame. The internal air is circulated by the fan to achieve rapid and uniform heating. Furthermore, the slowly flowing air during detection also helps the volatile organic compounds to be detected more accurately by the detection sensor, improving the efficiency of the volatile organic compound monitor.

[0043] Equipped with a mounting bracket and a flow guide, the flow guide at the bottom of the mounting bracket directs the volatilized organic matter more concentratedly to the detection sensor, resulting in more accurate data and improving the practicality of the volatile organic compound monitor.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A volatile organic compound (VOC) monitor, comprising a housing (1), characterized in that, Also includes: A spiral plate (12) is fixedly connected to the inner wall of the housing (1), and an inner cylinder (9) is fixedly connected to the inner wall of the spiral plate (12); A sliding frame (3) is slidably connected to the bottom slide rail of the housing (1). The top of the sliding frame (3) is provided with a container (15), and the bottom is provided with ventilation holes (16) arranged in a ring array. The fan (5) installed in the sliding frame (3) and the heating element (6) at the bottom of the housing (1) form a forced convection heating channel with the fan (5) and the ventilation hole (16); The mounting bracket (13) fixed to the side wall of the inner cylinder (9) has a detection sensor (14) and a conical guide shroud (17) at its bottom, and the guide shroud (17) is located directly above the container (15).

2. The volatile organic compound monitor according to claim 1, characterized in that: The top of the sliding frame (3) is fixed with a sealing plate (4), and the bottom of the inner cylinder (9) is provided with a sealing hole that matches the size of the sealing plate (4), thus forming a dynamic sealing structure.

3. The volatile organic compound monitor according to claim 1, characterized in that: The top of the housing (1) is provided with a slidable filter plate (11), which is slidably connected to the top of the inner cylinder (9), and is provided with an ultraviolet lamp (8).

4. A volatile organic compound (VOC) monitor according to claim 1, characterized in that: The fan (5) has an adjustable power mode: it operates at full power during the heating phase to form a spiral airflow channel; and it operates at reduced speed during the detection phase to control the airflow velocity to 1m / s≤2m / s.

5. A volatile organic compound monitor according to any one of claims 1-4, characterized in that: The bottom of the housing (1) is provided with an inlet and outlet and a hinged opening and closing plate (2), and the sliding frame (3) is pulled out for loading and unloading through a gripping groove.

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