Internal circulation motor-free fan gas measuring device

Abstract

The utility model relates to an internal circulation motor-free fan gas measuring device, and belongs to the technical field of environment detection equipment. The device comprises a measuring box, a measuring mechanism and a circulating mechanism, the measuring mechanism is arranged in the measuring box, and the measuring mechanism is used for measuring environmental parameters in the measuring box; the circulating mechanism comprises a driving assembly and a circulating assembly, the circulating assembly is arranged in the measuring box, the driving assembly is arranged outside the measuring box, the driving assembly and the circulating assembly are correspondingly arranged, and the distance between the driving assembly and the circulating assembly is smaller than a preset value. The driving assembly is used for driving the circulating assembly to move, and the circulating assembly is used for driving gas in the measuring box to flow. The gas measuring device has the effect of improving the problem that the driving structure affects the measuring accuracy of the gas measuring device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of environmental detection equipment, and particularly relates to an internal circulation motor-free fan gas measuring device. BACKGROUND

[0002] In the process of environmental detection, it is often necessary to measure gases such as temperature and humidity, carbon dioxide, and the like, to obtain the required environmental parameters. Generally, environmental parameters are measured by a gas measuring device. The gas measuring device plays an important role in the fields of environmental monitoring, industrial production, and scientific research, and provides key data support for production process control, environmental protection, and safety monitoring. It ensures production efficiency and product quality, and also provides strong protection for human health. With the increasing requirements for environmental quality and the continuous improvement of industrial automation, the accuracy and reliability of the gas measuring device become increasingly important.

[0003] At present, a measuring instrument is usually arranged in a measuring box to form a gas measuring device, so that the air in the measuring box is measured to obtain the required environmental parameters. In addition, in order to uniformly mix the gas, a high-power fan is arranged in the measuring box to realize the circulation of the gas in the measuring box and improve the measurement accuracy.

[0004] However, in a long-term measurement process, the high-power fan generates heat due to the copper wire of the driving structure circuit of the motor, which affects the accuracy of the measurement of the environmental parameters. In addition, the motor has large vibration, and the vibration of the motor may be transmitted to the measuring instrument, causing measurement errors. These problems are particularly prominent in scenarios requiring high-precision measurement, which limits the application range of the gas measuring device.

[0005] In the related art, the driving structure affects the measurement accuracy of the gas measuring device. CONTENT OF THE INVENTION

[0006] In order to improve the problem that the driving structure affects the measurement accuracy of the gas measuring device, the present application provides an internal circulation motor-free fan gas measuring device.

[0007] The internal circulation motor-free fan gas measuring device provided by the present application adopts the following technical solution:

[0008] The application discloses an internal circulation motorless fan gas measuring device, which comprises a measuring box, a measuring mechanism arranged in the measuring box and used for measuring environmental parameters in the measuring box, and a circulation mechanism comprising a driving assembly and a circulation assembly, wherein the circulation assembly is arranged in the measuring box, the driving assembly is arranged outside the measuring box, the driving assembly and the circulation assembly are correspondingly arranged, the distance between the driving assembly and the circulation assembly is less than a preset value, the driving assembly is used for driving the circulation assembly to move, and the circulation assembly is used for driving gas in the measuring box to flow.

[0009] By adopting the technical scheme, the environmental parameters in the measuring box can be accurately measured by the measuring mechanism, meanwhile, the driving assembly is arranged outside the measuring box and correspondingly matched with the circulation assembly, so that the influence of heat and vibration of the traditional motor-driven fan on the measuring result is avoided, thereby improving the accuracy and stability of the measurement.

[0010] Optionally, the circulation assembly comprises a circulation carrier, a circulation rotating shaft and a plurality of circulation fan blades, the circulation carrier is connected with the measuring box, the circulation rotating shaft and the plurality of circulation fan blades are arranged in the circulation carrier, the circulation rotating shaft is rotationally connected with the circulation carrier, the first ends of the circulation fan blades are connected with the circulation rotating shaft, and the plurality of circulation fan blades are uniformly distributed in the circumferential direction of the circulation rotating shaft.

[0011] By adopting the technical scheme, the circulation rotating shaft is rotationally arranged in the circulation carrier, and the first ends of the circulation fan blades are connected with the circulation rotating shaft and uniformly distributed in the circumferential direction of the circulation rotating shaft. The structure design makes the circulation assembly effectively drive the gas in the measuring box to flow, thereby improving the accuracy of the gas measurement.

[0012] Optionally, the driving assembly comprises a driving member, a driving carrier, a driving rotating shaft and a plurality of driving fan blades, the driving carrier is arranged on one side of the measuring box, the driving member is arranged on the side of the driving carrier away from the measuring box, the plurality of driving fan blades are arranged in the driving carrier, one end of the driving rotating shaft is transmissionally connected with the output end of the driving member, the other end of the driving rotating shaft is rotationally connected with the driving carrier, the first ends of the driving fan blades are connected with the driving rotating shaft, the plurality of driving fan blades are uniformly distributed in the circumferential direction of the driving rotating shaft, and the driving member is used for driving the driving rotating shaft to rotate.

[0013] By adopting the technical scheme, the driving member is arranged outside the measuring box, avoiding the influence of the traditional internal fan on the measuring environment due to motor heating, and improving the measurement accuracy. The driving member drives the driving fan blades to rotate through the driving shaft, and the driving fan blades are uniformly distributed in the circumferential direction of the driving shaft to form a complete fan structure, which helps to realize the driving effect on the circulating assembly.

[0014] Optionally, the driving fan blades and the circulating fan blades are arranged one-to-one, the circulating assembly includes a plurality of circulating magnetic attraction members, the circulating magnetic attraction members are arranged corresponding to the circulating fan blades, the circulating magnetic attraction members are arranged at the second ends of the corresponding circulating fan blades, the driving assembly includes a plurality of driving magnetic attraction members, the driving magnetic attraction members are arranged corresponding to the driving fan blades, the driving magnetic attraction members are arranged at the second ends of the corresponding driving fan blades, and the driving magnetic attraction members and the circulating magnetic attraction members are arranged one-to-one, and the polarities of the corresponding driving magnetic attraction members and the circulating magnetic attraction members are opposite.

[0015] By adopting the technical scheme, the polarities of the corresponding circulating magnetic attraction members and driving magnetic attraction members are opposite, which can realize non-contact driving between the driving assembly and the circulating assembly. This design avoids the heat transfer problem caused by the direct driving of the traditional motor, thereby reducing the interference with the environmental parameters in the measuring box and improving the measurement accuracy. At the same time, since the driving assembly is located outside the measuring box, the influence of motor vibration on the measurement result is further reduced, and the stability of the measuring device is improved.

[0016] Optionally, the horizontal distance between the corresponding circulating magnetic attraction members and the driving magnetic attraction members is less than a preset distance.

[0017] By adopting the technical scheme, the horizontal distance between the corresponding circulating magnetic attraction members and the driving magnetic attraction members is less than a preset distance, so that the magnetic force between the driving assembly and the circulating assembly is more significant, thereby improving the driving efficiency and ensuring the stable operation of the circulating assembly. At the same time, this design reduces the distance between the driving assembly and the circulating assembly, further reduces energy loss, and improves the measurement accuracy and reliability of the overall device.

[0018] Optionally, the driving assembly includes a damping member, and the damping member is arranged below the driving member and the driving carrier.

[0019] By adopting the technical scheme, the damping member in the driving assembly is arranged below the driving member and the driving carrier, which can effectively reduce the vibration generated by the driving member during operation and transmitted to the measuring box, thereby reducing the interference of vibration on the measuring mechanism and improving the measurement accuracy.

[0020] Optionally, the damping member is a damping sponge.

[0021] By adopting the technical scheme, the shock-absorbing sponge can effectively reduce the vibration generated by the driving assembly during operation and transmitted to the measuring box, thereby reducing the influence of the vibration on the measurement accuracy. On the one hand, the vibration generated during the operation of the motor is significantly weakened, and the detection of the environmental parameters by the measuring mechanism is avoided from being disturbed by the vibration; on the other hand, the influence of the external vibration source on the driving assembly is further isolated by the softness of the shock-absorbing sponge, and the stability and reliability of the driving assembly are improved.

[0022] Optionally, the measuring box is transparent.

[0023] By adopting the technical scheme, the transparent design of the measuring box enables the user to intuitively observe the gas state inside the measuring box and the working conditions of the circulating assembly and the measuring mechanism, thereby improving the monitorability and operation convenience of the device.

[0024] Optionally, the measuring mechanism comprises a calibration member and a measuring member, and the calibration member is arranged on one side of the measuring member.

[0025] By adopting the technical scheme, real-time calibration of the measuring member can be achieved, and the accuracy of the measurement result is improved. On the one hand, the calibration member provides a reference datum for the measuring member, and reduces the error caused by environmental changes or equipment aging; on the other hand, the adjacent arrangement of the calibration member and the measuring member facilitates synchronous adjustment and comparison, ensures that the working conditions of the two are consistent, and further improves the measurement reliability.

[0026] Optionally, the circulating mechanism is provided in multiple groups.

[0027] By adopting the technical scheme, the provision of multiple groups of circulating mechanisms can significantly improve the flow efficiency and uniformity of the gas in the measuring box. The synergistic effect of the multiple groups of circulating mechanisms makes the distribution of the gas in the measuring box more uniform, thereby improving the accuracy of the detection of the environmental parameters by the measuring mechanism. In addition, the design of the multiple groups of circulating mechanisms can also enhance the stability of the gas flow, reduce the vortex or dead angle that may be generated by single-point circulation, and further reduce the measurement error.

[0028] In summary, the present application has at least one of the following beneficial technical effects:

[0029] 1. By arranging the driving assembly outside the measuring box and using the magnetic attraction member to achieve non-contact transmission between the driving assembly and the circulating assembly, the influence of the heat generated by the driving assembly on the environment in the measuring box and the measuring mechanism is effectively avoided, thereby improving the accuracy of the measurement of environmental parameters such as temperature, humidity, and carbon dioxide;

[0030] 2. The distance between the driving assembly and the circulating assembly is less than a predetermined value, and in combination with the polarity design of the magnetic attraction member, the efficiency and stability of the gas circulation in the measuring box are ensured, and the possibility of the vibration of the driving assembly being transmitted to the inside of the measuring box is reduced, thereby reducing the interference with the measurement result of the measuring mechanism;

[0031] 3. The external drive mode is adopted, so that the structure in the measuring box is more simple, the complexity and potential error source caused by the installation of the driving assembly in the measuring box are reduced, and the reliability and measurement accuracy of the device are further improved. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a layout top view of the internal circulation motorless fan gas measuring device of the embodiment of the present application.

[0033] Figure 2 is a front view of the internal circulation motorless fan gas measuring device of the embodiment of the present application.

[0034] Figure 3 is a schematic diagram of the circulation mechanism cooperating with the measuring box of the embodiment of the present application.

[0035] Figure 4 is a schematic diagram of the circulation mechanism of the embodiment of the present application.

[0036] BRIEF DESCRIPTION OF DRAWINGS

[0037] 1. Measuring box;

[0038] 2. Measuring mechanism; 21. Calibration piece; 22. Measuring piece;

[0039] 3. Circulation mechanism;

[0040] 31. Driving assembly; 311. Driving piece; 312. Driving bearing piece; 313. Driving shaft; 314. Driving fan blade; 315. Driving magnetic attraction piece; 316. Shock absorbing piece;

[0041] 32. Circulation assembly; 321. Circulation bearing piece; 322. Circulation shaft; 323. Circulation fan blade; 324. Circulation magnetic attraction piece. DETAILED DESCRIPTION

[0042] The following will be described in detail in combination with the accompanying drawings Figure 1 - the accompanying drawings Figure 4 The present application will be further described in detail. In the embodiment, if not specifically defined, “connection”, “connection” and “fixation” are understood in a broad sense, including fixed connection, detachable connection, connection forming an integral structure, mechanical connection, electrical connection, direct connection, indirect connection by intermediaries, internal connection and interaction between two elements, which can be understood according to the specific circumstances.

[0043] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, in the description of the present embodiment, the terms "on", "under", "left", "right" and other orientation or position relationships shown in the drawings are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise stated, the orientation words such as "inner" and "outer" used in the present application refer to the contour of the corresponding parts.

[0044] As shown in Figure 1 , the present embodiment discloses an internal circulation motorless fan gas measuring device (hereinafter referred to as "device"). The device comprises a measuring box 1, a measuring mechanism 2 and a circulation mechanism 3, and is suitable for high-precision environmental measurement.

[0045] As shown in Figure 1 , Figure 2 and Figure 3 , the measuring mechanism 2 is arranged in the measuring box 1, and is used for measuring the temperature and humidity, corrosion degree, carbon dioxide and other environmental parameters in the measuring box 1. The parameter measurement can be realized by measuring the gas in the measuring box 1. The circulation mechanism 3 comprises a driving assembly 31 and a circulation assembly 32. The circulation assembly 32 is arranged in the measuring box 1, and the driving assembly 31 is arranged outside the measuring box 1. The driving assembly 31 and the circulation assembly 32 are correspondingly arranged. The driving assembly 31 is used to drive the circulation assembly 32 to move, and the circulation assembly 32 is used to drive the gas in the measuring box 1 to flow, so as to form internal circulation in the measuring box 1. By arranging the driving assembly 31 outside the measuring box 1 and correspondingly matching with the circulation assembly 32, the circulation assembly 32 realizes the circulation of the gas in the measuring box 1, avoiding the influence of the heat and vibration of the traditional motor-driven fan on the measurement result, so that the environmental parameters in the measuring box 1 can be accurately measured by the measuring mechanism 2, thereby improving the measurement accuracy and the stability of the measuring mechanism 2.

[0046] The distance between the driving assembly 31 and the circulation assembly 32 is less than a preset value, which guarantees the reliable energy transmission between the two, and improves the uniformity of the gas flow in the measuring box 1 and the reliability of the measurement. The preset value can be set according to the need, so that the driving assembly 31 can reliably drive the circulation assembly 32.

[0047] As shown in Figure 1 , Figure 2 and Figure 3As shown, the measuring mechanism 2 comprises a calibration member 21 and a measuring member 22. The calibration member 21 is arranged on one side of the measuring member 22, so as to realize real-time calibration of the measuring member 22 and improve the accuracy of the measurement result. The calibration member 21 is a calibration instrument, and the measuring member 22 is a measuring instrument. Both of them are powered on. The calibration member 21 is used as a reference to determine whether the measurement result of the measuring member 22 is accurate, so as to calibrate the measuring member 22 in time, thereby ensuring the measurement accuracy of the environmental parameters. It can be understood that the device can also calibrate the measuring member 22. The measuring member 22 is used as a measured instrument, and the calibration member 21 is used as a calibration instrument. By comparing the data of the calibration instrument, the measurement accuracy of the measured instrument is calibrated. On the one hand, the calibration member 21 provides a reference datum for the measuring member 22, so as to reduce the error caused by environmental changes or equipment aging. On the other hand, the adjacent arrangement of the calibration member 21 and the measuring member 22 facilitates synchronous comparison and adjustment, ensures that the working states of the two are consistent, and further improves the measurement reliability. The calibration member 21 and the measuring member 22 are the same type of measuring instruments. The type of instrument is selected according to the needs, and the measurement of the required environmental parameters can be realized.

[0048] As shown in Figure 1 , Figure 3 and Figure 4 , the circulating assembly 32 comprises a circulating carrier 321, a circulating rotating shaft 322 and a plurality of circulating fan blades 323, forming a non-driven fan. The circulating carrier 321 is connected to the measuring box 1. The circulating rotating shaft 322 and the plurality of circulating fan blades 323 are arranged in the circulating carrier 321. The circulating rotating shaft 322 is rotatably connected to the circulating carrier 321. The first end of the circulating fan blade 323 is connected to the circulating rotating shaft 322. The plurality of circulating fan blades 323 are uniformly distributed in the circumferential direction of the circulating rotating shaft 322. This structure design enables the circulating assembly 32 to effectively drive the gas in the measuring box 1 to flow, thereby improving the accuracy of the gas measurement.

[0049] As shown in Figure 1 , Figure 3 and Figure 4As shown, the driving assembly 31 comprises a driving member 311, a driving carrier 312, a driving shaft 313 and a plurality of driving blades 314, forming a belt-driven fan. The driving carrier 312 is arranged on one side of the measuring box 1, and the driving member 311 is arranged on the side of the driving carrier 312 away from the measuring box 1, avoiding the influence of the heat generated by the traditional internal fan on the measuring environment, and improving the accuracy of the measurement. A plurality of driving blades 314 are arranged in the driving carrier 312, one end of the driving shaft 313 is transmissionally connected to the output end of the driving member 311, and the other end of the driving shaft 313 is rotationally connected to the driving carrier 312. The first end of the driving blade 314 is connected to the driving shaft 313, and a plurality of driving blades 314 are uniformly distributed around the driving shaft 313. The driving member 311 is used to drive the driving shaft 313 to rotate. The driving member 311 is a motor, which drives the driving blades 314 to rotate through the driving shaft 313. The driving blades 314 are uniformly distributed around the driving shaft 313, forming a complete fan structure, which helps to realize the driving effect on the circulating assembly 32.

[0050] As shown in Figure 1 , Figure 2 and Figure 3 , the driving blades 314 and the circulating blades 323 are arranged one by one. The circulating assembly 32 comprises a plurality of circulating magnetic attraction members 324, which are arranged corresponding to the circulating blades 323, and the circulating magnetic attraction members 324 are arranged at the second end of the corresponding circulating blades 323. The driving assembly 31 comprises a plurality of driving magnetic attraction members 315, which are arranged corresponding to the driving blades 314, and the driving magnetic attraction members 315 are arranged at the second end of the corresponding driving blades 314. The driving magnetic attraction members 315 and the circulating magnetic attraction members 324 are arranged one by one, and the polarity of the corresponding driving magnetic attraction members 315 and the circulating magnetic attraction members 324 is opposite. The driving carrier 312 and the circulating carrier 321 are both housings, and the driving magnetic attraction members 315 and the circulating magnetic attraction members 324 are both magnets.

[0051] By using the characteristic that the polarity of the corresponding circulating magnetic attraction members 324 and the driving magnetic attraction members 315 is opposite, non-contact driving between the driving assembly 31 and the circulating assembly 32 can be realized. This design avoids the heat transfer problem caused by the traditional motor directly driving the fan inside the measuring box 1, thereby reducing the interference with the environmental parameters in the measuring box 1 and improving the accuracy of the measurement. At the same time, since the driving assembly 31 is located outside the measuring box 1, the influence of the vibration of the driving structure on the measurement results is further reduced, and the stability of the measuring mechanism 2 is improved.

[0052] As shown in Figure 1 , Figure 2 and Figure 3As shown, the horizontal distance between the corresponding circulating magnetic attraction member 324 and the driving magnetic attraction member 315 is less than a preset distance. The preset distance is set according to requirements, which enables the driving magnetic attraction member 315 to drive the corresponding circulating magnetic attraction member 324 to move, so that the rotation of the driving fan can drive the non-driving fan to rotate, thereby realizing internal circulation in the measurement box 1.

[0053] The horizontal distance between the corresponding circulating magnetic attraction member 324 and the driving magnetic attraction member 315 is less than a preset distance, which makes the magnetic attraction between the driving assembly 31 and the circulating assembly 32 more significant, thereby improving the driving efficiency and ensuring the stable operation of the circulating assembly 32. At the same time, this design reduces the distance between the driving assembly 31 and the circulating assembly 32, further reduces energy loss, and improves the measurement accuracy and reliability of the overall device. By removing the motor from the fan inside the measurement box 1, the heating phenomenon of the driving structure during fan operation is reduced, and the influence on the temperature in the measurement box 1 where the instrument is located is reduced. At the same time, there is no vibration generated by the high-speed operation of the driving structure inside the measurement box 1, which reduces the influence of vibration and helps to form accurate measurement of the internal environmental parameters of the gas measurement device and precise monitoring of the measured instrument.

[0054] As shown in Figure 1 , Figure 2 and Figure 3 , optionally, the driving assembly 31 includes a damping member 316 arranged below the driving member 311 and the driving carrier 312, which can further reduce the vibration generated by the driving member 311 during operation and transmitted to the measurement box 1, thereby reducing the interference of vibration on the measurement mechanism 2 and improving the accuracy of measurement. In this embodiment, the damping member 316 is a damping sponge. The damping sponge can effectively reduce the vibration generated by the driving assembly 31 during operation and transmitted to the measurement box 1, thereby reducing the influence of vibration on measurement accuracy. On the one hand, it significantly reduces the vibration generated during motor operation and avoids vibration interference with the detection of environmental parameters by the measurement mechanism 2; on the other hand, it further isolates the influence of external vibration sources on the driving assembly 31 by using the softness of the damping sponge, thereby improving the stability and reliability of the driving assembly 31.

[0055] Optionally, the measurement box 1 is transparent. The transparent design of the measurement box 1 enables users to directly observe the gas state inside the measurement box 1 and the working conditions of the circulating assembly 32 and the measurement mechanism 2, thereby improving the monitorability and operation convenience of the device. By providing an interference-free measurement environment, the calibration instrument inside the device and the measured instrument can be measured quickly and accurately in an environment with as little temperature rise and vibration as possible, thereby achieving precise adjustment of the accuracy of the measured instrument, improving the measurement speed, and improving the product quality and timeliness of the measurement.

[0056] As shown in Figure 1 ,Figure 2 and Figure 3 As shown, optionally, the circulation mechanism 3 has multiple sets. The gas measuring chamber 1 is equipped with two to three or more sets of undriven fans. Setting multiple sets of circulation mechanisms 3 can significantly improve the flow efficiency and uniformity of the gas within the measuring chamber 1. The synergistic effect of multiple sets of circulation mechanisms 3 makes the gas distribution within the measuring chamber 1 more uniform, thereby improving the accuracy of the measuring mechanism 2 in detecting environmental parameters. Furthermore, the design of multiple sets of circulation mechanisms 3 can also enhance the stability of gas flow, reduce eddies or dead zones that may be generated by single-point circulation, and further reduce measurement errors. The drive support 312 can be spaced apart from the measuring chamber 1 to further reduce the impact of vibration.

[0057] like Figure 1 , Figure 2 and Figure 3 As shown, by combining an external driven fan with a driving magnetic chuck 315 and an internal undriven fan with a circulation magnetic chuck 324, a system is formed that achieves simultaneous rotation of the external fan and the internal undriven fan through the principle of magnetic attraction between opposite poles. Multiple sets of internal undriven fans constitute the internal circulation system of the gas measuring device. Changing the speed of the external driven fan controls the operating speed of the internal undriven fan group. The driving component 31, placed outside the measuring box 1, together with the internal undriven fans, forms a quiet, low-heat, and efficient environmental measuring device. This facilitates gas monitoring at different ambient temperatures, reduces the impact of temperature and vibration on the internal instruments, improves monitoring efficiency, and is easy to operate. Furthermore, the independently configured undriven fans are easy to replace and adjust, contributing to improved circulation regulation capabilities.

[0058] Understandably, the device also includes necessary structures for connection, support, drive, positioning, limiting, sealing and control functions, so that the device can operate normally; the shape, size, material and number of each part of the device can be determined as needed, as long as the corresponding functions can be achieved.

[0059] The implementation principle of the internal circulation fanless gas measuring device according to this application embodiment is as follows: the circulation component 32 inside the measuring chamber 1 achieves gas flow under the drive component 31. Since the drive component 31 is located outside the measuring chamber 1, the influence of heat generation from the drive structure and wires on the measuring environment is avoided, thereby improving the accuracy of the measurement. At the same time, since the drive component 31 is located outside the measuring chamber 1, measurement errors caused by vibration are further reduced. The entire device achieves a fanless internal circulation effect through the separate design of the drive component 31 and the circulation component 32, effectively solving the heat generation and vibration problems in traditional devices, improving the stability, reliability, and measurement accuracy of the device, and enhancing the applicability of the device.

[0060] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: all equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. An internally cycled motorless fan gas measurement device, characterized by, The utility model relates to a kind of measurement box and measurement mechanism, including: Measurement box (1); Measurement mechanism (2) is located in the measurement box (1), and the measurement mechanism (2) is used to measure the environmental parameter in the measurement box (1); Circulation mechanism (3), the circulation mechanism (3) includes driving assembly (31) and circulation assembly (32), the circulation assembly (32) is located in the measurement box (1), the driving assembly (31) is located outside the measurement box (1), the driving assembly (31) and the circulation assembly (32) are correspondingly arranged, the distance between the driving assembly (31) and the circulation assembly (32) is less than preset value, the driving assembly (31) is used to drive the circulation assembly (32) movement, and the circulation assembly (32) is used to drive the gas flow in the measurement box (1).

2. The internally-recirculating, motorless fan gas measurement device of claim 1, wherein, The circulation assembly (32) includes circulation carrier (321), circulation rotating shaft (322) and several circulation fan blades (323), the circulation carrier (321) is connected the measurement box (1), the circulation rotating shaft (322) and several circulation fan blades (323) are located in the circulation carrier (321), the circulation rotating shaft (322) is rotatably connected to the circulation carrier (321), and the first end of the circulation fan blade (323) is connected to the circulation rotating shaft (322), and several circulation fan blades (323) are evenly distributed in the circumferential direction of the circulation rotating shaft (322).

3. The internally-recirculating, motorless fan gas measurement device of claim 2, wherein, The driving assembly (31) includes driving member (311), driving carrier (312), driving rotating shaft (313) and several driving fan blades (314), the driving carrier (312) is located on one side outside the measurement box (1), the driving member (311) is located on the side of the driving carrier (312) away from the measurement box (1), several driving fan blades (314) are located in the driving carrier (312), one end of the driving rotating shaft (313) is drivingly connected to the output end of the driving member (311), the other end of the driving rotating shaft (313) is rotatably connected to the driving carrier (312), the first end of the driving fan blade (314) is connected to the driving rotating shaft (313), several driving fan blades (314) are evenly distributed in the circumferential direction of the driving rotating shaft (313), and the driving member (311) is used to drive the driving rotating shaft (313) to rotate.

4. The internally-recirculating, motorless fan gas measurement device of claim 3, wherein, The driving fan blades (314) are arranged one by one with the circulating fan blades (323), the circulating assembly (32) comprises a plurality of circulating magnetic attraction members (324), the circulating magnetic attraction members (324) are arranged one by one with the circulating fan blades (323), the circulating magnetic attraction members (324) are arranged at the second ends of the corresponding circulating fan blades (323), the driving assembly (31) comprises a plurality of driving magnetic attraction members (315), the driving magnetic attraction members (315) are arranged one by one with the driving fan blades (314), the driving magnetic attraction members (315) are arranged at the second ends of the corresponding driving fan blades (314), the driving magnetic attraction members (315) are arranged one by one with the circulating magnetic attraction members (324), and the polarities of the corresponding driving magnetic attraction members (315) and the circulating magnetic attraction members (324) are opposite.

5. The internally-recircirculating, motorless fan gas meter of claim 4 wherein, The horizontal distance between the corresponding circulating magnetic attraction members (324) and the driving magnetic attraction members (315) is less than a preset distance.

6. The internally-recircirculating, motorless fan gas meter of claim 3 wherein, The driving assembly (31) comprises a damping member (316), and the damping member (316) is arranged below the driving member (311) and the driving bearing member (312).

7. The internally-recircirculating, motorless fan gas meter of claim 6 wherein, The damping member (316) is a damping sponge.

8. The internally-recircirculating, motorless fan gas measurement device of claim 1 wherein, The measuring box (1) is transparent.

9. The internally-recircirculating, motorless fan gas measurement device of claim 1 wherein, The measuring mechanism (2) comprises a calibration member (21) and a measuring member (22), and the calibration member (21) is arranged on one side of the measuring member (22).

10. The internally-recircirculating, motorless fan gas measurement device of claim 1, wherein, The circulating mechanism (3) is provided with a plurality of groups.

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