Small formaldehyde monitoring and alarming device

Abstract

The utility model discloses a small formaldehyde monitoring alarm device, which comprises a movable tray, a monitoring movable base, an annular alarm lamp, an extension monitoring probe rod, a remote control monitoring probe, a remote control signal receiving module, a formaldehyde monitoring module, a standby control button and an endurance energy storage power supply. According to the utility model, by arranging the controller, the controller regulates and controls the forward and reverse rotation starting time of the servo motor in the transmission mechanism, and then the transmission mechanism can drive the moving assembly to circularly adjust up and down through the connecting assembly at regular time, so that the effect of circularly detecting different heights is achieved; the problems that the device can only perform detection at one height during detection, a person still needs to manually adjust the height through a telescopic rod when the height needs to be adjusted, automatic circulating adjustment cannot be performed to ensure the accuracy of detection, and formaldehyde can be inhaled into a human body when the person enters the device for adjustment, so that certain limitation is caused are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of formaldehyde purification monitoring equipment, in particular to a small formaldehyde monitoring alarm device. Background Art

[0002] In real life, when decorating a new car or a new house, or renovating an old house, the coating materials, furniture, interior decoration, etc. used contain a lot of formaldehyde. In a semi-closed state, formaldehyde cannot evaporate and dissipate on its own. The only way to passively reduce the formaldehyde content in the room is through ventilation. The common method of absorbing formaldehyde by plants has a negligible effect. The second method is to absorb formaldehyde through other objects such as activated carbon or toilet paper.

[0003] According to the announcement number: CN219552321U, a small formaldehyde monitoring alarm device is disclosed, the main body includes a monitoring mobile base, the top of the monitoring mobile base is connected to a remote control monitoring probe through a telescopic rod, a circular alarm light is arranged on the side of the remote control monitoring probe, a remote control signal transceiver module is arranged on the top of the remote control monitoring probe, an extended monitoring probe rod is arranged on one side of the remote control monitoring probe, a formaldehyde monitoring module is arranged on the other side of the remote control monitoring probe, a battery life energy storage power supply is arranged on the inner side of the monitoring mobile base, a spare control button is arranged on the side of the spare control button, a power access port is arranged on the side of the spare control button, and a mobile tray is arranged at the bottom of the monitoring mobile base. This device can implement multi-angle and all-weather formaldehyde monitoring of formaldehyde inside the room by moving, and can realize the feedback of monitoring data through remote control, and make on-site alarms with the alarm light to avoid relevant personnel staying in an environment with excessive formaldehyde for a long time;

[0004] Based on the search of the above patents and in combination with the equipment in the prior art, it is found that when the above equipment is used, although it can solve the problem of whether the formaldehyde content in a room or vehicle has decreased after being stationary for a period of time, whether it is suitable for occupancy depends entirely on experience or the body's reaction. The lack of body reaction does not necessarily mean that there is no formaldehyde in the closed environment. Long-term inhalation of formaldehyde can easily cause infertility and cancer in some body tissues. However, the device can only detect at one height during detection, and when height adjustment is required, people still need to enter and manually adjust it through the telescopic rod. Automatic cycle adjustment cannot be performed to ensure the accuracy of the detection. There is also the danger of inhaling formaldehyde into the body when people enter to adjust, which leads to certain limitations. Utility Model Content

[0005] In order to solve the problems raised in the above-mentioned background technology, the purpose of the utility model is to provide a small formaldehyde monitoring and alarm device, which has the advantage of automatic cycle adjustment, and solves the problem that the device can only detect at one height during detection, and when the height adjustment is required, people still need to go in and manually adjust it through the telescopic rod, and automatic cycle adjustment cannot be performed to ensure the accuracy of the detection. There is also the danger of inhaling formaldehyde into the body when people go in to adjust, which solves the problem of certain limitations.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a small formaldehyde monitoring and alarm device, comprising a mobile tray, a monitoring mobile base, a ring-shaped alarm light, an extended monitoring probe, a remote control monitoring probe, a remote control signal receiving module, a formaldehyde monitoring module, a standby control button and a battery life energy storage power supply, wherein the battery life energy storage power supply is fixedly connected to the top of the mobile tray, the monitoring mobile base is fixedly connected to the top of the battery life energy storage power supply, the remote control monitoring probe is located at the top of the monitoring mobile base, the extended monitoring probe is fixedly connected to the left side of the remote control monitoring probe, the remote control signal receiving module is fixedly connected to the top of the remote control monitoring probe, and the formaldehyde monitoring module The aldehyde monitoring module is fixedly connected to the right side of the remote control monitoring probe, the standby control button is fixedly connected to the left side of the front face of the monitoring mobile base, the top of the monitoring mobile base is fixedly connected to a limit rod, a limit hole is provided inside the limit rod, the top of the monitoring mobile base is fixedly connected to a limit frame located outside the limit rod, the top of the limit frame is fixedly connected to a limit plate, the inner side of the limit plate is fixedly connected to an adjusting rod, an adjusting hole is provided inside the adjusting rod, a moving component is slidably connected inside the adjusting hole, a transmission mechanism is movably installed on the top of the limit rod, and the left side of the top of the monitoring mobile base is fixedly connected to a controller.

[0007] As a preferred embodiment of the utility model, the moving component includes a moving block, which is slidably connected to the inside of the adjusting hole, and the outer side of the adjusting rod is provided with a moving groove used to cooperate with the moving block, and the moving grooves are provided with a number of grooves and are distributed in a circular shape with equal distances. The outer side of the moving block is fixedly connected to a moving rod, and the other section of the moving rod is fixedly connected to a top plate, and the top plate is fixedly installed on the bottom of the remote control monitoring probe.

[0008] As a preferred embodiment of the utility model, the transmission mechanism includes a driven tooth, which is movably mounted on the top of the limit rod, the left side of the driven tooth is meshed with a transmission tooth, the bottom of the transmission tooth is fixedly connected to a servo motor, the inside of the driven tooth is fixedly connected to a threaded ring, the inside of the threaded ring is threadedly connected to a screw, and the top of the screw is fixedly connected to a connecting assembly.

[0009] As a preferred embodiment of the utility model, the connecting assembly includes a connecting column, which is movably mounted on the top of the screw rod, and the top of the connecting column is fixedly connected to a threaded rod, the interior of the movable block is provided with a through hole for use with the threaded rod, and the top of the threaded rod is threadedly connected to a nut.

[0010] As a preferred embodiment of the utility model, a truncated cone block is fixedly connected to the top of the screw rod, a truncated cone groove for cooperating with the truncated cone block is provided at the bottom of the connecting column, and the truncated cone block and the truncated cone groove are movably installed.

[0011] As a preferred embodiment of the present invention, the bottom of the servo motor is fixedly connected to a fixing rod, and the bottom of the fixing rod is fixedly mounted to the top of the monitoring mobile base.

[0012] As a preferred embodiment of the present invention, the bottom of the screw is fixedly connected with a limiting plate.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] 1. The utility model sets a controller to adjust the forward and reverse start time of the servo motor in the transmission mechanism, and then enables the transmission mechanism to regularly drive the moving component to perform cyclic up and down adjustment through the connecting component, thereby achieving the effect of cyclic detection at different heights, solving the problem that the device can only detect at one height during detection, and when height adjustment is required, people still need to go in and manually adjust through the telescopic rod, and automatic cyclic adjustment cannot be performed to ensure the accuracy of the detection. When people go in to adjust, there is a risk of inhaling formaldehyde into the body, thus having certain limitations, and achieving the effect of automatic cyclic adjustment.

[0015] 2. The utility model sets a moving component so that the moving block can be slidably installed inside the adjusting rod through the adjusting hole, and then the moving block is fixed to the moving rod through the moving groove, and then the moving rod is fixed to the remote control monitoring probe through the top plate, so that the transmission mechanism can drive the moving block to move through the connecting component, and the moving block can synchronously drive the moving rod, the top plate and the remote control monitoring probe to move and adjust synchronously through the moving groove, thereby achieving the effect of movement adjustment.

[0016] 3. The utility model sets a transmission mechanism so that the top of the driven tooth and the limit rod are movably installed, so that the limit rod can limit the driven tooth to prevent the driven tooth from slipping or being unable to rotate, and then the driven tooth is threadedly connected to the screw through a threaded ring, and then the driven tooth and the transmission tooth are fixed, and then the transmission tooth and the servo motor are fixed. When cyclic adjustment is required, the forward and reverse starting time of the servo motor can be adjusted by the controller, so that the servo motor can drive the transmission tooth to rotate in the forward and reverse directions, and then the transmission tooth drives the driven tooth to rotate, and the driven tooth drives the screw to rotate and move through the threaded ring, and the screw drives the moving component to move and adjust through the connecting component, and the moving component drives the remote control monitoring probe to automatically adjust up and down, thereby achieving the effect of automatic cyclic adjustment for detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the southwest isometric three-dimensional structure of the utility model;

[0018] Figure 2 It is a schematic diagram of a partial three-dimensional structure of the utility model;

[0019] Figure 3 For this utility model Figure 1 The enlarged structural diagram at A in the middle;

[0020] Figure 4 For this utility model Figure 2 The enlarged structural diagram at B in the middle;

[0021] Figure 5 For this utility model Figure 2 Enlarged structural diagram at point C in the middle.

[0022] In the figure: 1. Mobile tray; 2. Monitoring mobile base; 3. Ring alarm light; 4. Extended monitoring probe; 5. Remote control monitoring probe; 6. Remote control signal receiving module; 7. Formaldehyde monitoring module; 8. Backup control button; 9. Endurance energy storage power supply; 10. Limit rod; 11. Limit hole; 12. Limit frame; 13. Limit plate; 14. Adjustment rod; 15. Adjustment hole; 16. Mobile assembly; 161. Mobile block; 162. Movable slot; 163, movable rod; 164, top plate; 17, transmission mechanism; 171, driven gear; 172, transmission gear; 173, servo motor; 174, threaded ring; 175, screw rod; 176, connecting assembly; 1761, connecting column; 1762, threaded rod; 1763, through hole; 1764, nut; 18, controller; 19, truncated cone block; 20, truncated cone slot; 21, fixing rod; 22, limit plate. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] like Figures 1 to 5 As shown, the utility model provides a small formaldehyde monitoring and alarm device, including a mobile tray 1, a monitoring mobile base 2, a ring alarm light 3, an extended monitoring probe 4, a remote control monitoring probe 5, a remote control signal receiving module 6, a formaldehyde monitoring module 7, a standby control button 8 and a battery life energy storage power supply 9, the battery life energy storage power supply 9 is fixedly connected to the top of the mobile tray 1, the monitoring mobile base 2 is fixedly connected to the top of the battery life energy storage power supply 9, the remote control monitoring probe 5 is located at the top of the monitoring mobile base 2, the extended monitoring probe 4 is fixedly connected to the left side of the remote control monitoring probe 5, the remote control signal receiving module 6 is fixedly connected to the top of the remote control monitoring probe 5, and the formaldehyde monitoring module 7 is fixedly connected to the remote The right side of the monitoring probe 5 is controlled, and the standby control button 8 is fixedly connected to the left side of the front face of the monitoring mobile base 2. The top of the monitoring mobile base 2 is fixedly connected to a limit rod 10, and a limit hole 11 is provided inside the limit rod 10. The top of the monitoring mobile base 2 is fixedly connected to a limit frame 12 located outside the limit rod 10, and the top of the limit frame 12 is fixedly connected to a limit disk 13, and the inner side of the limit disk 13 is fixedly connected to an adjusting rod 14, and an adjusting hole 15 is provided inside the adjusting rod 14. A moving component 16 is slidably connected inside the adjusting hole 15, and a transmission mechanism 17 is movably installed on the top of the limit rod 10. The left side of the top of the monitoring mobile base 2 is fixedly connected to a controller 18.

[0025] refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The moving assembly 16 includes a moving block 161, which is slidably connected to the inside of the adjusting hole 15. A moving groove 162 is provided on the outer side of the adjusting rod 14 to cooperate with the moving block 161. There are several moving grooves 162 that are distributed in a circular shape with equal distances. A moving rod 163 is fixedly connected to the outer side of the moving block 161. The other end of the moving rod 163 is fixedly connected to a top plate 164. The top plate 164 is fixedly installed on the bottom of the remote control monitoring probe 5.

[0026] As a technical optimization scheme of the utility model, by setting a moving component 16, the moving block 161 is slidably installed inside the adjusting rod 14 through the adjusting hole 15, and then the moving block 161 is fixed to the moving rod 163 through the moving groove 162, and then the moving rod 163 is fixed to the remote control monitoring probe 5 through the top plate 164, so that the transmission mechanism 17 can drive the moving block 161 to move through the connecting component 176, and the moving block 161 can synchronously drive the moving rod 163, the top plate 164 and the remote control monitoring probe 5 to move and adjust synchronously through the moving groove 162, thereby achieving the effect of movement and adjustment.

[0027] refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The transmission mechanism 17 includes a driven tooth 171, which is movably mounted on the top of the limiting rod 10. A transmission tooth 172 is meshed on the left side of the driven tooth 171. A servo motor 173 is fixedly connected to the bottom of the transmission tooth 172. A threaded ring 174 is fixedly connected to the inside of the driven tooth 171. A screw 175 is threadedly connected to the inside of the threaded ring 174. A connecting assembly 176 is fixedly connected to the top of the screw 175.

[0028] As a technical optimization solution of the utility model, by setting the transmission mechanism 17, the driven tooth 171 and the top of the limit rod 10 are movably installed, so that the limit rod 10 can limit the driven tooth 171 to prevent the driven tooth 171 from slipping or being unable to rotate, and then the driven tooth 171 is threadedly connected with the screw rod 175 through the threaded ring 174, and then the driven tooth 171 is fixed with the transmission tooth 172, and then the transmission tooth 172 is fixed with the servo motor 173. When cyclic adjustment is required The controller 18 can be used to adjust the forward and reverse start-up time of the servo motor 173, so that the servo motor 173 can drive the transmission gear 172 to rotate in the forward and reverse directions, and then the transmission gear 172 drives the driven gear 171 to rotate, so that the driven gear 171 drives the screw 175 to rotate and move through the threaded ring 174, and the screw 175 drives the moving component 16 to move and adjust through the connecting component 176, so that the moving component 16 drives the remote control monitoring probe 5 to automatically adjust up and down, thereby achieving the effect of automatic cyclic adjustment for detection.

[0029] refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The connecting assembly 176 includes a connecting column 1761, which is movably installed on the top of the screw rod 175. The top of the connecting column 1761 is fixedly connected with a threaded rod 1762. The interior of the moving block 161 is provided with a through hole 1763 used to cooperate with the threaded rod 1762. The top of the threaded rod 1762 is threadedly connected with a nut 1764.

[0030] As a technical optimization scheme of the utility model, by setting a connecting component 176, the connecting column 1761 and the screw 175 can be movably installed, and then the connecting column 1761 fixes the moving block 161 through the threaded rod 1762 and the screw and the through hole 1763, ensuring that when the screw 175 moves, it can synchronously drive the moving block 161 to move through the connecting column 1761, thereby ensuring the stability of the movement adjustment.

[0031] refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The top of the screw rod 175 is fixedly connected with a truncated cone block 19, and the bottom of the connecting column 1761 is provided with a truncated cone groove 20 used in conjunction with the truncated cone block 19, and the truncated cone block 19 and the truncated cone groove 20 are movably installed.

[0032] As a technical optimization solution of the utility model, by setting the truncated cone block 19 and the truncated cone groove 20, the screw 175 can be movably installed through the truncated cone block 19 and the truncated cone groove 20 of the connecting column 1761, so as to avoid the screw 175 from synchronously driving the connecting column 1761 to rotate when rotating and moving, thereby ensuring the stability of the rotational movement adjustment.

[0033] refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The bottom of the servo motor 173 is fixedly connected to a fixing rod 21 , and the bottom of the fixing rod 21 is fixedly installed with the top of the monitoring mobile base 2 .

[0034] As a technical optimization solution of the present invention, by providing a fixing rod 21, the fixing rod 21 fixes the servo motor 173 to prevent the servo motor 173 from slipping, thereby ensuring the stability of the servo motor 173 in use.

[0035] refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The bottom of the screw rod 175 is fixedly connected to the limiting plate 22 .

[0036] As a technical optimization solution of the present invention, a limiting plate 22 is provided to limit the bottom end of the screw rod 175, thereby preventing the screw rod 175 and the threaded ring 174 from falling off, thereby ensuring the stability of use.

[0037] The working principle and use process of the utility model are as follows: when in use, the mobile tray 1, the monitoring mobile base 2, the annular alarm light 3, the extended monitoring probe 4, the remote control monitoring probe 5, the remote control signal receiving module 6, the formaldehyde monitoring module 7, the standby control button 8 and the endurance energy storage power supply 9 are assembled and used to ensure the stability of formaldehyde monitoring, and then the limit rod 10 and the driven gear 171 are movably installed, and then the limit frame 12 fixes the adjustment rod 14 through the limit plate 13 to ensure the stability of subsequent adjustment, so that the driven gear 171 and the limit rod 10 The top of the servo motor 173 is movably installed, so that the limiting rod 10 can limit the driven tooth 171 to prevent the driven tooth 171 from slipping or being unable to rotate, and then the driven tooth 171 is threadedly connected with the screw rod 175 through the threaded ring 174, and then the driven tooth 171 is fixed to the transmission tooth 172, and then the transmission tooth 172 is fixed to the servo motor 173, and the connecting column 1761 is movably installed with the screw rod 175, and the connecting column 1761 is movably installed with the screw rod 175, and then the connecting column 1761 is threadedly connected with the screw rod 172. The moving block 161 is fixed by the screw and the through hole 1763, so that the moving block 161 is slidably installed in the adjusting rod 14 through the adjusting hole 15, and then the moving block 161 is fixed to the moving rod 163 through the moving groove 162, and then the moving rod 163 is fixed to the remote control monitoring probe 5 through the top plate 164. When it is necessary to monitor the formaldehyde concentration in the air by circulating at different heights, the forward and reverse starting time of the servo motor 173 can be adjusted by the controller 18, so that the servo motor 173 can drive the transmission gear 172 to rotate in the forward and reverse directions, and then the transmission gear 172 drives the driven tooth 171 to rotate forward and backward, so that the driven tooth 171 drives the screw 175 to rotate forward and backward through the threaded ring 174. When the screw 175 moves, it can synchronously drive the moving block 161 to move through the connecting column 1761, so that the moving block 161 can synchronously drive the moving rod 163, the top plate 164, the remote control monitoring probe 5, the extended monitoring probe rod 4, the remote control signal receiving module 6, the formaldehyde monitoring module 7 and the annular alarm light 3 through the moving groove 162 to perform synchronous movement and adjustment, thereby achieving the effect of automatic cyclic adjustment.

[0038] To sum up: this small formaldehyde monitoring and alarm device, by setting a controller 18, enables the controller 18 to adjust the forward and reverse start time of the servo motor 173 in the transmission mechanism 17, and then enables the transmission mechanism 17 to regularly drive the moving component 16 to perform cyclic up and down adjustment through the connecting component 176, thereby achieving the effect of cyclic detection at different heights, and solves the problem that the device can only detect at one height during detection, and when height adjustment is required, people still need to enter and manually adjust through the telescopic rod, and automatic cyclic adjustment cannot be performed to ensure the accuracy of the detection. There is also the danger of formaldehyde being inhaled into the body when people enter to adjust, thus having certain limitations.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A small formaldehyde monitoring and alarm device, comprising a mobile tray (1), a monitoring mobile base (2), a ring-shaped alarm light (3), an extended monitoring probe (4), a remote control monitoring probe (5), a remote control signal receiving module (6), a formaldehyde monitoring module (7), a standby control button (8) and a battery life energy storage power supply (9), characterized in that: The battery life energy storage power supply (9) is fixedly connected to the top of the mobile tray (1), the monitoring mobile base (2) is fixedly connected to the top of the battery life energy storage power supply (9), the remote control monitoring probe (5) is located at the top of the monitoring mobile base (2), the extended monitoring probe rod (4) is fixedly connected to the left side of the remote control monitoring probe (5), the remote control signal receiving module (6) is fixedly connected to the top of the remote control monitoring probe (5), the formaldehyde monitoring module (7) is fixedly connected to the right side of the remote control monitoring probe (5), the standby control button (8) is fixedly connected to the left side of the front of the monitoring mobile base (2), and the top of the monitoring mobile base (2) is fixedly connected to the limited A limiting rod (10) is provided with a limiting hole (11) inside the limiting rod (10); a limiting frame (12) located outside the limiting rod (10) is fixedly connected to the top of the monitoring mobile base (2); a limiting plate (13) is fixedly connected to the top of the limiting frame (12); an adjusting rod (14) is fixedly connected to the inner side of the limiting plate (13); an adjusting hole (15) is provided inside the adjusting rod (14); a moving component (16) is slidably connected inside the adjusting hole (15); a transmission mechanism (17) is movably installed on the top of the limiting rod (10); and a controller (18) is fixedly connected to the left side of the top of the monitoring mobile base (2).

2. A small formaldehyde monitoring and alarm device according to claim 1, characterized in that: The moving assembly (16) comprises a moving block (161), the moving block (161) being slidably connected to the inside of the adjustment hole (15), the outer side of the adjustment rod (14) being provided with a moving groove (162) for use with the moving block (161), the moving grooves (162) being provided with a plurality of moving grooves (162) being distributed in a circular shape with equal distances, the outer side of the moving block (161) being fixedly connected to a moving rod (163), the other end of the moving rod (163) being fixedly connected to a top plate (164), and the top plate (164) being fixedly mounted to the bottom of the remote control monitoring probe (5).

3. A small formaldehyde monitoring and alarm device according to claim 2, characterized in that: The transmission mechanism (17) comprises a driven tooth (171), the driven tooth (171) being movably mounted on the top of the limit rod (10), a transmission tooth (172) being meshed on the left side of the driven tooth (171), a servo motor (173) being fixedly connected to the bottom of the transmission tooth (172), a threaded ring (174) being fixedly connected inside the driven tooth (171), a screw rod (175) being threadedly connected inside the threaded ring (174), and a connecting assembly (176) being fixedly connected to the top of the screw rod (175).

4. A small formaldehyde monitoring and alarm device according to claim 3, characterized in that: The connecting assembly (176) comprises a connecting column (1761), wherein the connecting column (1761) is movably mounted on the top of the screw rod (175), a threaded rod (1762) is fixedly connected to the top of the connecting column (1761), a through hole (1763) for cooperating with the threaded rod (1762) is provided inside the moving block (161), and a nut (1764) is threadedly connected to the top of the threaded rod (1762).

5. A small formaldehyde monitoring and alarm device according to claim 4, characterized in that: The top of the screw rod (175) is fixedly connected to a truncated cone block (19), and the bottom of the connecting column (1761) is provided with a truncated cone groove (20) used in conjunction with the truncated cone block (19), and the truncated cone block (19) and the truncated cone groove (20) are movably installed.

6. A small formaldehyde monitoring and alarm device according to claim 3, characterized in that: The bottom of the servo motor (173) is fixedly connected to a fixing rod (21), and the bottom of the fixing rod (21) is fixedly mounted to the top of the monitoring mobile base (2).

7. A small formaldehyde monitoring and alarm device according to claim 3, characterized in that: The bottom of the screw rod (175) is fixedly connected to a limiting plate (22).

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