Handheld gas sampling instrument

Abstract

The utility model belongs to the technical field of gas sampling, and discloses a handheld gas sampler, which comprises: a casing, which comprises a shell and a handle arranged on the shell, the handle is provided with a gas inlet hole, and the shell is provided with a gas outlet hole; the sampling device is detachably connected to the handle, and a sampling opening of the sampling device is used for being connected with the air inlet hole; the air pump is arranged on the shell, and the air inlet end of the air pump is used for being connected with an air outlet of the sampling device; the flow metering device is arranged on the shell, the air outlet end of the air pump is used for being connected with the air inlet end of the flow metering device, and the air outlet end of the flow metering device is used for being connected with the air outlet hole; the controller is arranged on the shell and used for being electrically connected with the air pump and the flow metering device so as to control starting and stopping of the air pump and receive and process detection signals of the flow metering device. The handheld gas sampling instrument is small in size and convenient to carry, and the sampling efficiency is improved.

Description

Handheld gas sampler Technical Field

[0001] This application relates to the field of gas sampling technology, specifically to a handheld gas sampler. Background Technology

[0002] In environmental monitoring and source tracing of volatile organic compounds (VOCs) or odorous gases, it is often necessary to sample and analyze gases at different locations or at the same location at different times. Traditional gas sampling equipment is often bulky and lacks portability, making it inconvenient for sampling personnel to move flexibly and quickly deploy sampling points in complex field environments. In addition, some existing portable gas sampling devices have certain design flaws, making it inconvenient and inefficient to change or load sampling containers (such as adsorption tubes), affecting the efficiency of on-site sampling and failing to meet the actual needs of multiple on-site sampling. Summary of the Invention

[0003] The purpose of this application is to provide a handheld gas sampler that is small in size, easy to carry, and improves sampling efficiency.

[0004] To solve at least one of the above-mentioned technical problems, this application adopts the following technical solution:

[0005] A handheld gas sampler according to an embodiment of this application includes: a housing, comprising a casing and a handle disposed on the casing, the handle having an air inlet and the casing having an air outlet; at least one sampling device for detachably connecting to the handle, the sampling port of the sampling device being connected to the air inlet; an air pump disposed on the casing, the air inlet of the air pump being connected to the air outlet of the sampling device; a flow metering device disposed on the casing, the air outlet of the air pump being connected to the air inlet of the flow metering device, the air outlet of the flow metering device being connected to the air outlet; and a controller disposed on the casing for electrically connecting to the air pump and the flow metering device to control the start and stop of the air pump and to receive and process detection signals from the flow metering device.

[0006] In one possible implementation, the sampling device includes: a connector for detachable connection to a handle, a first outlet of the connector for connection to the inlet of an air pump; and an adsorption tube, a second outlet at one end for detachable connection to the inlet of the connector, and an inlet at the other end for connection to an air inlet.

[0007] In one possible implementation, a receiving cavity is provided inside the handle, and an air inlet is connected to the receiving cavity. The end of the receiving cavity away from the air inlet is open, and the sampling device is used for detachable connection with the receiving cavity. The connector is threadedly connected to the opening of the receiving cavity, and the operating part of the connector is located outside the receiving cavity.

[0008] In one possible implementation, the outer surface of the handle is provided with a connecting part for detachable connection with the connector, the connecting part being a groove structure or a boss structure.

[0009] In one possible implementation, the outer surface of the adsorption tube is marked with a mark to indicate the installation direction; the air inlet of the connector is provided with a sealing ring for mating with the adsorption tube.

[0010] In one possible implementation, the sampler also includes a filter device mounted on the housing. The inlet of the filter device is connected to the outlet of the air pump, and the outlet of the filter device is connected to the inlet of the flow metering device. The air pump, controller, flow metering device, and filter device are located in a cavity inside the housing, and the outlet is connected to the cavity of the housing.

[0011] In one possible implementation, the sampler also includes a battery module mounted on the housing for powering the sampler; the battery module is located inside the housing or at one end of the handle.

[0012] In one possible implementation, the sampler also includes an operation setting unit, which is mounted on the housing and electrically connected to the controller for controlling the sampler's power-on, power-off, and sampling parameter settings.

[0013] In one possible implementation, the operation setting unit includes: a power button for controlling the power on and power off of the sampler; and an operation screen for displaying and setting the sampling parameters of the sampler.

[0014] In one possible implementation, the handle is integrally formed with or fixedly connected to the housing, with both ends of the handle connected to the housing respectively, and a clearance zone is formed between the handle and the housing.

[0015] The above-mentioned technical solution of this application has at least one of the following beneficial effects:

[0016] According to the handheld gas sampler of this application, the sampling device is detachably connected to the handle of the housing, making it easy to replace and reducing the size of the sampler. This facilitates carrying, on-site operation, and the collection of multiple samples, thus improving sampling efficiency. Furthermore, the controller can receive and process the detection signal from the flow metering device, thereby precisely controlling the start and stop of the gas pump and improving sampling accuracy.

[0017] In addition, unless otherwise specified in the technical solution of this application, the technical solution can be implemented by conventional means in the field. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 is a three-dimensional structural diagram of a handheld gas sampler according to one embodiment of this application;

[0020] Figure 2 is a schematic diagram of the structural principle of a handheld gas sampler according to one embodiment of this application;

[0021] Figure 3 is a schematic diagram of the structure of a sampling device according to one embodiment of this application;

[0022] Figure 4 is a schematic diagram of the connector structure according to one embodiment of this application;

[0023] Figure 5 is a schematic diagram of the structure of an adsorption tube according to one embodiment of this application.

[0024] Explanation of the labels in the attached drawings:

[0025] 100 housing; 101 air inlet; 102 air outlet; 103 clearance zone; 110 housing; 120 handle; 121 receiving cavity;

[0026] Sampling device 200; connector 210; first air outlet 211; operating part 212; adsorption tube 220; second air outlet 221; label 222;

[0027] Air pump 300;

[0028] Flow metering device 400;

[0029] Controller 500;

[0030] Filter device 600;

[0031] Operation screen 700. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only some, not all, of the embodiments of this application, and are used merely to explain this application and are not intended to limit it. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0033] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "inner," "outer," "both ends," "both sides," "bottom," and "top," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the elements referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first," "second," "upper-level," "lower-level," "main," and "secondary," etc., are used for descriptive purposes only and can be simply used to more clearly distinguish different components, and should not be construed as indicating or implying relative importance.

[0034] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral molding; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0035] Referring to Figures 1 and 2, a handheld gas sampler according to an embodiment of this application is schematically shown. The sampler includes: a housing 100, at least one sampling device 200, a gas pump 300, a flow metering device 400, and a controller 500.

[0036] The housing 100 includes a casing 110 and a handle 120. The handle 120 is mounted on the casing 110 and has an air inlet 101. The casing 110 has an air outlet 102. An air pump 300, a flow metering device 400, and a controller 500 are mounted on the casing 110, for example, inside the casing 110. A sampling device 200 is detachably connected to the handle 120. The sampling device 200 can be installed inside the handle 120 or on its outer surface. The sampling port of the sampling device 200 is connected to the air inlet 101, the air inlet of the air pump 300 is connected to the air outlet of the sampling device 200, the air outlet of the air pump 300 is connected to the air inlet of the flow metering device 400, and the air outlet of the flow metering device 400 is connected to the air outlet 102. The controller 500 is electrically connected to the air pump 300 and the flow metering device 400 to control the start and stop of the air pump 300 and to receive and process the detection signals from the flow metering device 400. The flow metering device 400 can use a flow sensor, which is smaller in size.

[0037] When using the sampler of this application for sampling, the sampling device 200 is mounted on the handle 120, and then the sampler is started. The controller 500 controls the air pump 300 to start gas sampling. Simultaneously, the flow metering device 400 detects the gas sampling flow rate in real time and sends the detection signal to the controller 500. The controller 500 processes the detection signal, for example, by converting the detection signal into gas volume. When the sampled gas volume reaches a preset value, the controller 500 controls the air pump 300 to stop, and then the sampling device 200 is removed from the handle 120, completing the gas sampling. Furthermore, by replacing the sampling device 200 or its sampling section, multiple samples can be easily collected. It should be noted that how the controller 500 obtains the gas volume based on the detection signal can be achieved using existing conversion calculation methods, which will not be described in detail here.

[0038] Therefore, in this handheld gas sampler, the sampling device 200 is detachably connected to the handle 120 of the housing 100. The sampling device 200 is easy to replace, reducing the size of the sampler and making it convenient for sampling personnel to carry, operate on-site, and collect multiple samples. It is suitable for multiple on-site sampling, improving sampling efficiency. Furthermore, the controller 500 can receive and process the detection signal from the flow meter 400, thereby precisely controlling the start and stop of the gas pump 300, improving sampling accuracy.

[0039] In some embodiments, with reference to FIG1, the air inlet 101 may be provided at the front end or side of the handle 120, and the air outlet 102 may be provided at the rear end or side of the housing 110, thereby ensuring smooth airflow and not interfering with handheld operation.

[0040] In some embodiments, there are multiple sampling devices 200, each detachably connected to the handle 120. As one approach, each sampling device 200 can be connected to both the air inlet 101 and the air inlet of the air pump 300, allowing each device to operate independently within the sampler's air path, thus enabling simultaneous collection of multiple samples and further improving sampling efficiency. Alternatively, each sampling device 200 can be selectively connected to both the air inlet 101 and the air inlet of the air pump 300, allowing for individual sampling of each device 200, resulting in more flexible and convenient operation.

[0041] In some embodiments, referring to Figures 1-5, the sampling device 200 includes a connector 210 and an adsorption tube 220. The connector 210 is detachably connected to the handle 120, the first air outlet 211 of the connector 210 is connected to the air inlet of the air pump 300, the second air outlet 221 at one end of the adsorption tube 220 is detachably connected to the air inlet of the connector 210, and the air inlet at the other end of the adsorption tube 220 is connected to the air inlet 101. The air inlet of the adsorption tube 220 is the sampling port of the sampling device 200, the first air outlet 211 of the connector 210 is the air outlet of the sampling device 200, and the adsorption tube 220 is the sampling part of the sampling device 200. Thus, by removing the sampling device 200 and replacing the adsorption tube 220, it is convenient to collect multiple samples, suitable for multiple on-site sampling.

[0042] Optionally, referring to Figures 1, 3, 4, and 5, the sampling device 200 can be housed within the handle 120, which contains a receiving cavity 121. An air inlet 101 communicates with the receiving cavity 121, and the receiving cavity 121 is open at one end away from the air inlet 101. The sampling device 200 is detachably connected to the receiving cavity 121. Exemplarily, the connector 210 and the opening of the receiving cavity 121 can be connected by a thread, and an operating part 212 can be provided at the end of the connector 210 away from the adsorption tube 220. When the sampling device 200 is inserted into the receiving cavity 121 for connection, the operating part 212 facilitates the rotation of the connector 210. When the connector 210 is connected to the handle 120, the operating part 212 is located outside the receiving cavity 121, facilitating the disassembly of the sampling device 200. This not only makes operation more convenient and faster, improving disassembly efficiency, but also makes the structure more compact and stable, reducing volume and improving the safety and stability of the equipment. In addition, connector 210 can also be a quick-connect connector, which facilitates quick replacement of sampling device 200.

[0043] Optionally, referring to Figure 1, the outer surface of the handle 120 is provided with a connecting portion (not shown in the figure) for detachable connection with the connector 210. The connecting portion is a groove structure or a boss structure. As a result, the sampling device 200 can be disassembled more quickly.

[0044] Optionally, referring to Figures 3 and 5, a mark 222 for indicating the installation direction is provided on the outer surface of the adsorption tube 220. The mark 222 can be an directional arrow. This makes it easier to connect the adsorption tube 220 to the connector 210 and avoids incorrect installation direction of the adsorption tube 220.

[0045] Optionally, the air inlet of connector 210 is provided with a sealing ring for mating with adsorption tube 220. This results in a tighter connection and prevents air leakage.

[0046] Optionally, referring to Figures 1 and 4, the outer side of the connector 210 is provided with an annular groove coaxial with it, and the first air outlet 211 is located in the annular groove. The inner wall of the receiving cavity 121 is provided with an air intake channel for communicating with the air inlet end of the air pump 300. Multiple first air outlets 211 can be evenly distributed along the circumference of the annular groove. When the connector 210 is inserted into the receiving cavity 121, the inlet of the air intake channel is located in the annular groove, allowing the first air outlet 211 to communicate with the air intake channel. This ensures that air enters the air pump 300 more effectively from the first air outlet 211.

[0047] In some embodiments, referring to FIG2, the sampler further includes a filter device 600, which is disposed on the housing 110. The inlet end of the filter device 600 is connected to the outlet end of the air pump 300, and the outlet end of the filter device 600 is connected to the inlet end of the flow metering device 400. This facilitates the filtration of impurities in the gas.

[0048] Optionally, referring to Figure 1, a cavity (not shown in the figure) is provided inside the housing 110, and the air outlet 102 communicates with the cavity of the housing 110. The air pump 300, controller 500, flow metering device 400 and filter device 600 are located in the cavity inside the housing 110. As a result, the safety and stability are higher.

[0049] In some embodiments, referring to Figures 1 and 2, the sampler further includes a battery module (not shown) disposed on the housing 100. The battery module is used to power the sampler. The battery module can be located inside the housing 110, or it can be located at one end of the handle 120, for example, at the end of the handle 120 away from the air inlet 101. Therefore, powering the sampler with a battery module makes it easier for sampling personnel to move flexibly and quickly deploy sampling points in complex field environments. Furthermore, the battery module can be replaceable or rechargeable.

[0050] In some embodiments, referring to FIG1, the sampler further includes an operation setting unit disposed on the housing 100, such as on the handle 120 or the housing 110. The operation setting unit is electrically connected to the controller 500 and is used to control the power-on, power-off, and sampling parameter settings of the sampler. Specifically, the operation setting unit includes a power button (not shown in the figure) and an operation screen 700. The power button is used to control the power-on and power-off of the sampler and can be a physical button. The operation screen 700 is used to display and set the sampling parameters of the sampler. The operation screen 700 can be a touch screen and is disposed on the front of the housing 110. For example, the operation screen 700 can display and set the gas flow rate and gas volume to be sampled. This makes operation more convenient and faster, allowing sampling personnel to flexibly adjust the parameters and perform different sampling according to different needs, thus improving the applicability of the equipment.

[0051] In some embodiments, referring to FIG1, the handle 120 is integrally formed or fixedly connected to the housing 110, with both ends of the handle 120 connected to the housing 110 respectively, and a clearance area 103 is formed between the handle 120 and the housing 110. For example, the handle 120 can be shaped like a human hand grip, so that the sampler has an overall shape similar to a handheld tool. This makes it easier to operate and carry.

[0052] Based on the various embodiments of this application described above, in the absence of explicit denial or conflict, the technical features of one embodiment may be advantageously combined with one or more other embodiments.

[0053] The above descriptions are merely some embodiments of this application, used only to illustrate the technical solutions of this application, and not to limit it. It should be understood that those skilled in the art can make improvements or substitutions based on the above descriptions without departing from the inventive concept of this application, and all such improvements and substitutions should fall within the protection scope of this application. In this case, all details can be replaced with equivalent elements, and materials, shapes, and sizes can also be arbitrary.

Claims

1. A handheld gas sampler, characterized in that, The sampler includes: a housing, comprising a casing and a handle disposed on the casing, the handle having an air inlet and the casing having an air outlet; at least one sampling device for detachably connecting to the handle, the sampling port of the sampling device being connected to the air inlet; an air pump disposed on the casing, the air inlet of the air pump being connected to the air outlet of the sampling device; a flow metering device disposed on the casing, the air outlet of the air pump being connected to the air inlet of the flow metering device, the air outlet of the flow metering device being connected to the air outlet; and a controller disposed on the casing for electrically connecting to the air pump and the flow metering device to control the start and stop of the air pump and to receive and process detection signals from the flow metering device.

2. The handheld gas sampler according to claim 1, characterized in that, The sampling device includes: a connector for detachably connecting to the handle, the first air outlet of the connector for connecting to the air inlet of the air pump; and an adsorption tube, the second air outlet at one end of which is detachably connected to the air inlet of the connector, and the air inlet at the other end of which is connected to the air inlet.

3. The handheld gas sampler according to claim 2, characterized in that, The handle has a receiving cavity, the air inlet is connected to the receiving cavity, and the receiving cavity is open at one end away from the air inlet. The sampling device is used to be detachably connected to the receiving cavity. The connector is threadedly connected to the opening of the receiving cavity, and the operating part of the connector is located outside the receiving cavity.

4. The handheld gas sampler according to claim 2, characterized in that, The outer surface of the handle is provided with a connecting part for detachable connection with the connector, the connecting part being a groove structure or a boss structure.

5. The handheld gas sampler according to claim 2, characterized in that, The outer surface of the adsorption tube is marked with an indicator for the installation direction; the air inlet of the connector is provided with a sealing ring for cooperating with the adsorption tube.

6. The handheld gas sampler according to claim 1, characterized in that, The sampler also includes a filter device, which is disposed on the housing. The air inlet of the filter device is connected to the air outlet of the air pump, and the air outlet of the filter device is connected to the air inlet of the flow metering device. The air pump, the controller, the flow metering device, and the filter device are located in a cavity inside the housing, and the air outlet is connected to the cavity of the housing.

7. The handheld gas sampler according to claim 1, characterized in that, The sampler also includes a battery module, which is mounted on the housing and used to power the sampler; the battery module is located inside the housing or at one end of the handle.

8. The handheld gas sampler according to claim 1, characterized in that, The sampler also includes an operation setting unit, which is disposed on the housing and electrically connected to the controller for controlling the power-on, power-off and sampling parameter settings of the sampler.

9. The handheld gas sampler according to claim 8, characterized in that, The operation setting unit includes: a power button for controlling the power on and power off of the sampler; and an operation screen for displaying and setting the sampling parameters of the sampler.

10. The handheld gas sampler according to claim 1, characterized in that, The handle is integrally formed or fixedly connected to the housing, and both ends of the handle are respectively connected to the housing, with a clearance zone formed between the handle and the housing.

Images