A handheld fluid detection device

Abstract

This invention discloses a handheld fluid testing device, relating to the field of water quality testing technology. It includes a main unit comprising a plastic upper shell and a plastic lower shell, which are sealed together. An electronic control component is installed inside the upper shell, and a testing pool is installed inside the lower shell. A slot is provided at the bottom of the lower shell, and a consumable component is movably connected within the slot. One end of the consumable component has an injection port, and the other end has a locking element. When the consumable component is connected to the lower shell, the injection port is inserted into the testing pool, and the consumable component is fixed in the slot by the locking element. A sensing module is fixedly installed inside the lower shell. The consumable component uses modular, pre-packaged independent reagent bags. Only the entire device needs to be removed from the main unit for insertion and replacement, eliminating the steps of pipeline cleaning and cuvette replacement required in traditional multi-item testing. This significantly shortens the time required to change testing items and improves the efficiency of on-site multi-indicator inspection.

Description

Technical Field

[0001] This invention relates to the field of water quality testing technology, specifically a handheld fluid testing device. Background Technology

[0002] Currently, handheld water quality analyzers (for parameters such as residual chlorine, hardness, and total chlorine) are widely used in on-site rapid analysis. These devices are typically based on spectrophotometry or colorimetry, determining the concentration of target components by adding specific chemical reagents to the test solution to develop a color and then measuring its absorbance or color intensity.

[0003] Although existing handheld testing solutions are relatively mature, they still have some significant drawbacks in practical applications. First, the measurement and dispensing of reagents need to be done manually, which may lead to errors in reagent dosage in the field environment, affecting the test results. In addition, each test is cumbersome, and the equipment needs to be cleaned repeatedly when performing multiple tests, resulting in low testing efficiency. Furthermore, some reagents are corrosive, and they can easily splash onto the skin in the field, compromising user safety.

[0004] Therefore, a handheld fluid detection device is needed to achieve accurate reagent dispensing and automatic detection, thereby improving the efficiency of multi-item testing. Summary of the Invention

[0005] The purpose of this invention is to provide a handheld fluid detection device to solve the problems mentioned in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: The handheld fluid detection device includes a main unit, which includes a plastic upper shell and a plastic lower shell, which are sealed together. An electronic control component is installed inside the plastic upper shell, and a detection pool is installed inside the plastic lower shell. A slot is provided at the bottom of the plastic lower shell, and a consumable component is movably connected to the slot. One end of the consumable component is provided with a liquid injection port, and the other end of the consumable component is provided with a locking element. When the consumable component is connected to the plastic lower shell, the liquid injection port is inserted into the detection pool, and the consumable component is fixed in the slot by the locking element. A sensing module is fixedly installed inside the plastic lower shell.

[0007] As a preferred technical solution, a buffer pool is provided at one end of the surface of the upper shell of the plastic part, an opening is provided in the buffer pool, a mesh cover is fixedly installed in the buffer pool, a power button is provided at the other end of the upper shell of the plastic part, and a screen is also fixedly installed on the surface of the upper shell of the plastic part.

[0008] As a preferred technical solution, the slot is provided with a surrounding plate on both sides, a locking groove is provided on the top of the slot, a magnet is provided in the locking groove, and a conductive contact is provided on the contact surface between the slot and the consumable component.

[0009] As a preferred technical solution, the electronic control component includes a circuit board, the circuit board and the screen are electrically connected, and the power button controls the switching and function control of the circuit board.

[0010] As a preferred technical solution, the testing pool includes a base fixedly installed inside the lower shell of the plastic part. The outer wall of the base is uniformly provided with wire grooves, and copper coils are installed in the wire grooves. A testing chamber is opened inside the base. A stirring chamber is provided at the bottom of the testing chamber. A magnetic particle is rotatably connected inside the stirring chamber. A liquid injection channel is opened on one side of the testing chamber. A glass pipe is provided at the top of the base, and the top of the glass pipe is connected to the mesh cover.

[0011] As a preferred technical solution, the consumable component has a storage compartment containing two reagent bags and a peristaltic pump. One end of the consumable component has a connection hole, and a conductive contact is provided on the outer wall of the consumable component near the connection hole. The other end of the consumable component has a locking hole with a boss on the outside and an arc surface on the boss. A label is provided on the upper surface of the consumable component.

[0012] As a preferred technical solution, the injection port includes an injection tube, one end of which is inserted into the connection hole, and the other end of which is equipped with a one-way valve.

[0013] As a preferred technical solution, the locking member is inserted into the lock hole, and the locking member includes a locking rod and a knob. The end of the locking rod is inserted into the locking groove, and one end of the knob is located on the arc surface.

[0014] As a preferred technical solution, when the consumable component is connected to the lower plastic shell, the sensing module is located directly above the label.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. The consumable components adopt modular, pre-packaged independent dual reagent bags. When changing the water quality testing items, it is only necessary to unplug and plug the whole thing out of the main unit and replace the corresponding consumable components. This realizes one machine for multiple uses and plug and play. This design completely eliminates the cumbersome steps of cleaning the pipeline, changing the cuvette and manually reselecting the measurement curve in traditional multi-item testing. It can also realize automatic stirring of reagents and test liquids, avoiding uneven mixing due to manual stirring, greatly shortening the time required to change the testing items and improving the efficiency of on-site multi-index inspection. 2. When the consumable component is connected to the host, the sensing module on the host can automatically read the label on the consumable component, thereby reading the reagent type and capacity of the dual reagent bags, and displaying the reading results directly on the screen to avoid the testing personnel from accidentally taking the reagents. 3. The surrounding copper coil drives the magnetic particle to rotate, thereby fully stirring the reagent in the detection chamber. This avoids the shaking that may occur with manual stirring, ensuring that the reagent and the liquid being tested are thoroughly and evenly mixed, thus improving the accuracy of the test results. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a cross-sectional structural diagram of the main body of the present invention; Figure 3 This is a schematic diagram of the cross-sectional structure of the upper shell of the plastic part of the present invention; Figure 4 This is a cross-sectional view of the lower shell of the plastic part of the present invention; Figure 5 This is a cross-sectional view of the detection cell of the present invention; Figure 6 This is a schematic diagram of the cross-section of the detection cell of the present invention; Figure 7 This is a schematic diagram of the structure of the consumable component of the present invention; Figure 8 This is a cross-sectional structural diagram of the consumable component of the present invention; Figure 9 This is an enlarged schematic diagram of the keyhole structure of the present invention.

[0017] In the diagram: 1. Main unit; 2. Electrical control components; 3. Detection tank; 4. Consumable components; 5. Liquid inlet; 6. Locking element; 7. Sensing module; 11. Upper plastic shell; 12. Lower plastic shell; 21. Circuit board; 31. Base; 32. Testing chamber; 33. Mixing chamber; 34. Injection channel; 35. Glass tube; 41. Receptacle; 42. Double reagent bag; 43. Peristaltic pump; 44. Connection hole; 45. Conductive contact; 46. Lock hole; 47. Label; 51. Injection tube; 52. One-way valve; 61. Locking lever; 62. Knob; 1101, Buffer pool; 1102, Notch; 1103, Mesh cover; 1104, Power button; 1105, Screen; 1201, Slot; 1202, Enclosure; 1203, Locking slot; 1204, Magnet; 1205, Conductive contact; 3101, Cable trough; 3102, Copper coil; 3301, Magnetic piece; 4601, Boss; 4602, Curved surface. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example: Figures 1-9 As shown, this invention provides a technical solution for a handheld fluid detection device. The handheld fluid detection device includes a main unit 1, which includes an upper plastic shell 11 and a lower plastic shell 12. The upper and lower plastic shells 11 and 12 are sealed together. An electronic control component 2 is installed inside the upper plastic shell 11, and a detection pool 3 is installed inside the lower plastic shell 12. A slot 1201 is provided at the bottom of the lower plastic shell 12, and a consumable component 4 is movably connected within the slot 1201. One end of the consumable component 4 has an injection port 5, and the other end has a locking element 6. When the consumable component 4 is connected to the lower plastic shell 12, the injection port 5 is inserted into the detection pool 3, and the consumable component 4 is fixed in the slot 1201 by the locking element 6. A sensing module 7 is fixedly installed inside the lower plastic shell 12. The main unit 1 integrates the electronic control component 2, the detection pool 3, and the sensing module 7. The sealed connection between the upper and lower plastic shells 11 and 12 protects the components inside the main unit 1. The electronic control component 2 can... The main unit 1 can control various electrical components and directly display the test results on the screen 1105 via the circuit board 21. The test pool 3 is where the test liquid and reagents are mixed and stirred. By setting the test pool 3, the reagents can be fully mixed. The consumable component 4 is used to store different reagents and is also equipped with a power drive component to accurately input the reagents in the test pool 3 for testing. The consumable component 4 and the main unit 1 can be quickly disassembled and assembled, which greatly saves the time of repeatedly replacing the consumable component 4 and improves the work efficiency of multi-item inspection. The liquid inlet 5 is fixedly connected to the consumable component 4 to ensure that the reagents are stably input into the test pool 3 and prevent backflow. The locking part 6 can fix the consumable component 4 to the main unit 1 and assist in the quick disassembly and assembly of the consumable component 4. The sensing module 7 can detect the reagent information in the inserted consumable component 4 in real time to prevent the user from picking up the wrong reagent and affecting the final test results.

[0020] A buffer pool 1101 is provided at one end of the surface of the upper plastic shell 11. An opening 1102 is provided in the buffer pool 1101. A mesh cover 1103 is fixedly installed in the buffer pool 1101. A power button 1104 is provided at the other end of the upper plastic shell 11. A screen 1105 is also fixedly installed on the surface of the upper plastic shell 11. When the test is completed, the mixed reagent in the test pool 3 is discharged through the mesh cover 1103. The buffer pool 1101 buffers the discharged waste liquid to ensure that all the waste liquid flows out from the opening 1102 and prevents the waste liquid from splashing everywhere when it is poured.

[0021] The slot 1201 is provided with side panels 1202 on both sides, and a locking groove 1203 is provided on the top of the slot 1201. A magnet 1204 is provided in the locking groove 1203. The contact surface between the slot 1201 and the consumable component 4 is provided with conductive contacts 1205. When the consumable component 4 is inserted into the slot 1201, the side panels 1202 can initially fix the consumable component 4 to prevent it from falling out of the host 1. When the consumable component 4 is inserted into the slot 1201, the conductive contacts 45 on the outside of the consumable component 4 correspond one-to-one with the conductive contacts 1205 on the slot 1201, electrically connecting the peristaltic pump 43 in the consumable component 4 to the host 1, thereby providing power to the peristaltic pump 43. The peristaltic pump 43 extracts the reagent in the double reagent bag 42 and delivers it to the detection pool 3.

[0022] The electronic control component 2 includes a circuit board 21, which is electrically connected to the screen 1105. The power button 1104 controls the switching on and off of the circuit board 21.

[0023] The testing pool 3 includes a base 31 fixedly installed inside the lower shell 12 of the plastic part. The outer wall of the base 31 is uniformly surrounded by wire grooves 3101, and copper coils 3102 are installed within the wire grooves 3101. A testing chamber 32 is formed inside the base 31, and a stirring chamber 33 is located at the bottom of the testing chamber 32. A magnetic element 3301 is rotatably connected inside the stirring chamber 33. A liquid injection channel 34 is formed on one side of the testing chamber 32. A glass pipe 35 is located at the top of the base 31, and the top of the glass pipe 35 is connected to a mesh cover 1103. The bottom of the testing pool 3 is fixed by the base 31, and the top is fixed by the mesh cover 1103, ensuring a fixed connection between the testing pool 3 and the lower shell 12 of the plastic part. The outer wall of the base 31 is uniformly provided with several wire grooves 3101, and a copper coil 3102 is installed in each wire groove 3101. When current is passed through the copper coil 3102, a magnetic field is generated to attract the magnetic particle 3301 in the stirring chamber 33. When current is passed through the copper coil 3102 in sequence, the magnetic particle 3301 is continuously attracted by magnetic fields in different directions, thereby causing the magnetic particle 3301 to rotate. Through the rotation of the magnetic particle 3301, the reagent and the liquid to be tested in the detection pool 3 are fully stirred. A temperature sensor is installed at the bottom of the base 31, which can monitor the temperature in the stirring chamber 33 in real time. Users can verify whether the test results are affected by temperature.

[0024] The consumable component 4 has a storage compartment 41 containing two reagent bags 42 and a peristaltic pump 43. One end of the consumable component 4 has a connection hole 44, and a conductive contact 45 is located on the outer wall of the side closest to the connection hole 44. The other end of the consumable component 4 has a locking hole 46, with a boss 4601 on its outer side and an arc surface 4602 on the boss 4601. A label 47 is located on the upper surface of the consumable component 4, and a sealing gasket is placed around the conductive contact 45. When the consumable component 4 is inserted into the main unit 1, the sealing gasket prevents oxidation of the conductive contact 45 and also provides waterproofing. Existing handheld water quality analyzers only achieve portability of the main unit, neglecting the overall integrity of the testing system. Completing a standard test requires carrying a large number of scattered components, including the main unit, reagent packs, sample application tools, and colorimetric consumables. This piecemeal on-site testing equipment not only occupies a lot of storage space and is prone to the loss or omission of accessories, but also greatly increases the physical burden and inconvenience of on-site testing for a single person in the absence of an operating platform in the field. The consumable component 4 can package different reagents independently, and the peristaltic pump 43 installed in the consumable component 4 can complete the sampling of the reagents. It is convenient to carry. The double reagent bag 42 contains two kinds of reagents, which are stored in built-in independent packaging. Each independent packaging has a liquid outlet on the outside, and each liquid outlet is controlled by a separate peristaltic pump 43.

[0025] The consumable component 4 adopts a modular, pre-packaged independent dual reagent bag 42. When changing the water quality testing items, it is only necessary to unplug and plug the entire component from the main unit 1 and replace the corresponding consumable component 4. This achieves multi-purpose use and plug-and-play functionality. This design completely eliminates the cumbersome steps of pipeline cleaning, cuvette replacement, and manual reselection of the measurement curve in traditional multi-item testing, greatly shortening the time required to change the testing items and greatly improving the efficiency of on-site multi-index inspection.

[0026] The injection port 5 includes an injection tube 51, one end of which is inserted into the connection hole 44, and the other end of the injection tube 51 is equipped with a one-way valve 52. The injection port 5 allows for the connection between the detection pool 3 and the consumable assembly 4. The one-way valve 52 at the front end of the injection tube 51 forms a one-way channel, ensuring a stable input of reagents into the detection pool 3 and preventing liquid diversion within the detection pool 3. There are two injection tubes 51, each connected to a peristaltic pump 43 via a flexible tube. The peristaltic pump 43 is also connected to the outlet on the dual reagent bag 42 via a flexible tube. Through the cooperation of the injection tubes 51 and the peristaltic pump 43, the two reagents in the dual reagent bag 42 can be input into the detection pool 3 through independent infusion channels. Each infusion channel can be controlled by an independent peristaltic pump 43, which not only improves the accuracy of the infusion volume but also allows the dual reagent bags 42 to store two different reagents simultaneously, greatly increasing the storage capacity of the consumable assembly 4, reducing the frequency of reagent replacement, and thus improving detection efficiency.

[0027] The locking element 6 is inserted into the lock hole 46. The locking element 6 includes a locking rod 61 and a knob 62. The end of the locking rod 61 is inserted into the locking groove 1203, and one end of the knob 62 is located on the arc surface 4602. The locking rod 61 is made of iron. When the consumable component 4 is connected to the host 1, the locking element 6 passes through the lock hole 46 and is inserted into the locking groove 1203. The end of the locking rod 61 is attracted by the magnet 1204, thus locking the locking element 6. When it is necessary to remove the consumable component 4, the knob 62 is rotated. The knob 62 rotates along the arc surface 4602 to the boss 4601, thereby pulling the locking rod 61 out of the locking groove 1203, thus unlocking the locking element 6.

[0028] When the consumable component 4 is connected to the lower plastic shell 12, the sensing module 7 is located directly above the tag 47. When the consumable component 4 is connected to the host 1, the sensing module 7 on the host 1 can automatically read the tag 47 on the consumable component 4, thereby reading the reagent type and concentration parameters of the dual reagent bags 42. Then, the test results of the reagents are compared with the data read on the tag 47 to verify the composition of the reagents in the dual reagent bags 42. The sensing module 7 can be of various types, including NFC sensing modules and RFID sensing modules.

[0029] Working principle of the invention: The main unit 1 integrates an electronic control component 2, a detection pool 3, and a sensing module 7. The components inside the main unit 1 are protected by a sealed connection between the upper plastic shell 11 and the lower plastic shell 12. The electronic control component 2 controls various electrical components within the main unit 1 and directly displays the detection results on the screen 1105 via the circuit board 21. The detection pool 3 is where the test liquid and reagent are mixed and stirred, ensuring thorough mixing of the reagents. The consumable component 4 stores different reagents and also includes a power drive component to ensure the accurate mixing of reagents within the consumable component 4. The reagent is accurately input into the detection pool 3 for testing. The consumable component 4 can be quickly disassembled and assembled with the main body 1, which greatly saves the time of repeatedly replacing the consumable component 4 and improves the work efficiency of multi-item inspection. The liquid inlet 5 is fixedly connected to the consumable component 4 to ensure that the reagent is stably input into the detection pool 3 and prevent backflow. The locking part 6 can fix the consumable component 4 to the main body 1 and assist in the quick disassembly and assembly of the consumable component 4. The sensing module 7 can detect the reagent information in the inserted consumable component 4 in real time to avoid the user picking up the wrong reagent and affecting the final test results.

[0030] Current handheld water quality analyzers only achieve portability of the main unit, neglecting the overall system functionality. Completing a standard test requires carrying numerous disparate components, including the main unit, reagent kits, sample application tools, and colorimetric consumables. This piecemeal approach to on-site testing not only occupies significant storage space and is prone to losing or forgetting accessories, but also greatly increases the physical burden and inconvenience for individual operators in the absence of a suitable operating platform in the field. The consumables component 4 allows for the independent packaging of different or two types of reagents, and the peristaltic pump 43 installed within it facilitates reagent sampling, making it convenient to carry.

[0031] After the test is completed, the mixed reagent in the test pool 3 is discharged through the mesh cover 1103. The buffer pool 1101 buffers the discharged waste liquid to ensure that all the waste liquid flows out from the opening 1102 and prevents the waste liquid from splashing everywhere when it is poured.

[0032] When the consumable component 4 is inserted into the slot 1201, the side panels 1202 can initially fix the consumable component 4 to prevent it from falling out of the host 1. When the consumable component 4 is inserted into the slot 1201, the conductive contacts 45 on the outside of the consumable component 4 correspond one-to-one with the conductive contacts 1205 on the slot 1201, electrically connecting the peristaltic pump 43 inside the consumable component 4 to the host 1, thereby providing power to the peristaltic pump 43. The peristaltic pump 43 extracts the reagent from the double reagent bag 42 and delivers it to the detection pool 3.

[0033] The locking lever 61 can be fixed in several ways. Firstly, it can be fixed magnetically. In this case, the locking lever 61 is made of iron. When the consumable component 4 is connected to the main unit 1, the locking element 6 passes through the lock hole 46 and inserts into the locking groove 1203. The end of the locking lever 61 is attracted by the magnet 1204, thus locking the locking element 6. When it is necessary to remove the consumable component 4, the knob 62 is rotated. The knob 62 rotates along the arc surface 4602 to the boss 4601, thereby pulling the locking lever 61 out of the locking groove 1203, thus unlocking the locking element 6. Alternatively, a spring and a locking block can be used to fix and unlock the locking rod. In this locking method, the locking rod 61 is fitted with a spring, and the side wall of the knob 62 is provided with a protrusion. When the locking rod 61 is screwed into the lock hole 46 by the knob 62, the protrusion is embedded in the side wall of the lock hole 46. At this time, the locking rod 61 is fixed in the lock hole 46 by the knob 62, and the spring is in a compressed state. When unlocking is required, the knob 62 is rotated in the opposite direction, the protrusion moves away from the side wall of the lock hole 46, the compressed spring extends and pushes out the knob 62, thus unlocking the locking rod 61.

[0034] The consumable component 4 adopts a modular, pre-packaged independent dual reagent bag 42. When changing the water quality testing items, it is only necessary to unplug and plug the entire component from the main unit 1 and replace the corresponding consumable component 4. This achieves multi-purpose use and plug-and-play functionality. This design completely eliminates the cumbersome steps of pipeline cleaning, cuvette replacement, and manual reselection of the measurement curve in traditional multi-item testing, greatly shortening the time required to change the testing items and greatly improving the efficiency of on-site multi-index inspection.

[0035] When the consumable assembly is connected to the host, the sensing module on the host can automatically read the label on the consumable assembly, thereby reading parameters such as the reagent type and capacity of the dual reagent bags, and displaying the reading results directly on the screen to prevent the testing personnel from accidentally taking the reagents.

[0036] The copper coil 3102 surrounding the test chamber drives the magnetic particle 3301 to rotate, thereby fully stirring the reagent in the test chamber 32. This avoids the shaking that may occur with manual stirring, and allows the reagent to be fully and evenly mixed with the liquid being tested, thus improving the accuracy of the test results.

[0037] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A handheld fluid detection device, characterized in that: The handheld fluid detection device includes a main unit (1), which includes a plastic upper shell (11) and a plastic lower shell (12). The plastic upper shell (11) and the plastic lower shell (12) are sealed together. An electronic control component (2) is installed inside the plastic upper shell (11). A detection pool (3) is installed inside the plastic lower shell (12). A slot (1201) is provided at the bottom of the plastic lower shell (12). A consumable component (4) is movably connected inside the slot (1201). One end of the consumable component (4) is provided with a liquid injection port (5). The other end of the consumable component (4) is provided with a locking component (6). When the consumable component (4) is connected to the plastic lower shell (12), the liquid injection port (5) is inserted into the detection pool (3). The consumable component (4) is fixed in the slot (1201) by the locking component (6). A sensing module (7) is fixedly installed inside the plastic lower shell (12).

2. The handheld fluid detection device according to claim 1, characterized in that: A buffer pool (1101) is provided at one end of the surface of the upper plastic shell (11), an opening (1102) is provided in the buffer pool (1101), a mesh cover (1103) is fixedly installed in the buffer pool (1101), a power button (1104) is provided at the other end of the upper plastic shell (11), and a screen (1105) is also fixedly installed on the surface of the upper plastic shell (11).

3. The handheld fluid detection device according to claim 2, characterized in that: The slot (1201) is provided with a surrounding plate (1202) on both sides, and a locking groove (1203) is provided on the top of the slot (1201). A magnet (1204) is provided in the locking groove (1203), and a conductive contact (1205) is provided on the contact surface between the slot (1201) and the consumable assembly (4).

4. A handheld fluid detection device according to claim 3, characterized in that: The electronic control component (2) includes a circuit board (21), which is electrically connected to the screen (1105). The power button (1104) controls the switching and function control of the circuit board (21).

5. A handheld fluid detection device according to claim 4, characterized in that: The detection pool (3) includes a base (31) fixedly installed inside the lower shell (12) of the plastic part. The outer wall of the base (31) is uniformly provided with wire grooves (3101). A copper coil (3102) is installed in the wire grooves (3101). A detection chamber (32) is opened in the base (31). A stirring chamber (33) is provided at the bottom of the detection chamber (32). A magnetic ball (3301) is rotatably connected in the stirring chamber (33). A liquid injection channel (34) is opened on one side of the detection chamber (32). A glass pipe (35) is provided at the top of the base (31). The top of the glass pipe (35) is connected to the mesh cover (1103).

6. A handheld fluid detection device according to claim 5, characterized in that: The consumable assembly (4) has a storage compartment (41) inside, a double reagent bag (42) inside the storage compartment (41) and a peristaltic pump (43) installed inside the storage compartment (41). One end of the consumable assembly (4) has a connection hole (44). The outer wall of the consumable assembly (4) near the connection hole (44) has a conductive contact (45). The other end of the consumable assembly (4) has a lock hole (46). A boss (4601) is provided on the outside of the lock hole (46). An arc surface (4602) is provided on the boss (4601). A label (47) is provided on the upper surface of the consumable assembly (4).

7. A handheld fluid detection device according to claim 6, characterized in that: The injection port (5) includes an injection tube (51), one end of which is inserted into the connection hole (44), and the other end of which is equipped with a one-way valve (52).

8. A handheld fluid detection device according to claim 7, characterized in that: The locking element (6) is inserted into the lock hole (46). The locking element (6) includes a locking rod (61) and a knob (62). The end of the locking rod (61) is inserted into the locking groove (1203), and one end of the knob (62) is located on the arc surface (4602).

9. A handheld fluid detection device according to claim 8, characterized in that: When the consumable component (4) is connected to the lower plastic shell (12), the sensing module (7) is located directly above the label (47).

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