A high-precision alcohol tester

Abstract

A high-precision alcohol tester comprises a shell, a control unit, an alcohol sensor and a filter; the control unit and the alcohol sensor are installed in the shell and electrically connected with each other, and the shell is provided with a blowing port corresponding to the alcohol sensor; the filter is installed on the shell and internally provided with an air inlet cavity, a flow guide channel and an air supply cavity connected in sequence, and the filter is further provided with a baffle and a partition plate in the air inlet cavity and the air supply cavity respectively for shielding the first end and the second end of the flow guide channel, and the air supply cavity is communicated with the blowing port and the outside; the oral cavity gas entering the air inlet cavity contacts the partition plate to separate saliva, the oral cavity gas after separating saliva enters the flow guide channel and contacts the baffle to be buffered and stabilized, the stabilized oral cavity gas enters the air supply cavity and is discharged to the blowing port or the outside, so as to complete alcohol content detection under the premise of maintaining gas circulation; compared with the prior art, the present scheme can reduce the possibility of saliva staining the alcohol sensor, so as to ensure the detection precision and service life and improve the use experience.

Description

Technical Field

[0001] This utility model belongs to the technical field of alcohol testing instruments, and in particular relates to a high-precision alcohol testing instrument. Background Technology

[0002] An alcohol tester is an instrument used to detect whether a person has ingested alcohol and the amount of alcohol ingested. It can be used by traffic police to detect how much alcohol a driver has consumed, and it can also be used in other situations, such as in high-risk industries where drinking is prohibited for employees, to detect the alcohol content in a person's breath and prevent personal injury and significant property damage.

[0003] Existing breathalyzers mainly consist of a housing, an alcohol sensor, and a control unit. The alcohol sensor and control unit are installed inside the housing and electrically connected to each other. The housing has a blowhole corresponding to the alcohol sensor. Oral air is blown into the alcohol sensor through the blowhole, and the control unit analyzes the signal data from the alcohol sensor to determine the alcohol content in the exhaled oral air. It is relatively convenient to use.

[0004] However, in actual use, it was found that the user's exhaled breath contains saliva, which can easily enter the housing through the mouthpiece and contaminate the alcohol sensor. This can interfere with the detection accuracy and damage the alcohol sensor, affecting the user experience. Therefore, it is necessary to design a high-precision alcohol tester to solve this problem. Utility Model Content

[0005] (a) Technical problems to be solved This invention provides a high-precision alcohol tester that reduces the possibility of saliva contaminating the alcohol sensor, thereby ensuring detection accuracy and service life, and improving the user experience.

[0006] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: A high-precision alcohol tester includes a housing, a control unit, an alcohol sensor, and a filter. The control unit and the alcohol sensor are installed inside the housing and electrically connected to each other. The housing has an air outlet corresponding to the alcohol sensor. The filter is installed on the housing and has an air inlet chamber, a flow channel, and an air supply chamber connected in sequence. The filter also has partitions and baffles in the air inlet chamber and the air supply chamber, respectively, to block the beginning and end of the flow channel. The air supply chamber is connected to the air outlet and the outside. Oral air entering the air inlet chamber contacts the partitions to separate saliva. The oral air after saliva separation enters the flow channel and contacts the baffles for buffering and stabilization. The stabilized oral air enters the air supply chamber and is discharged to the air outlet or discharged to the outside via the air supply chamber.

[0007] Preferably, the filter element includes a blower head, a guide head, and a connecting seat; the air inlet cavity is formed inside the blower head, the partition is disposed inside the air inlet cavity and fixed to the blower head, the guide channel is formed inside the guide head, the partition is fixed to the guide head, the air supply cavity is formed inside the connecting seat, and the side wall of the air supply cavity is provided with an exhaust hole connecting to the air outlet and a vent hole connecting to the outside; the blower head is detachably connected to the guide head to connect the air inlet cavity and the guide channel, the guide head is detachably connected to the connecting seat to connect the guide channel and the air supply cavity, and the connecting seat is installed on the housing so that the air supply cavity connects to the air outlet.

[0008] Preferably, the blower head has a fixed column in the air inlet cavity, the partition is fixedly installed at the head end of the fixed column, the fixed column is also provided with an air inlet channel that connects to the guide channel, and the side wall of the air inlet channel is provided with an air inlet hole that is offset from the partition and connects to the air inlet cavity; the guide head has a guide column inside, the baffle is fixedly installed at the tail end of the guide column, the guide channel is formed inside the guide column, and the side wall of the guide channel is provided with a guide hole that is offset from the baffle and connects to the air supply cavity; the air inlet channel, the partition, the guide channel and the baffle are coaxially arranged.

[0009] Preferably, the air inlet is provided in a plurality of circular arrays around the fixed column, the guide hole is provided in a plurality of circular arrays around the guide column, and the exhaust hole is provided in a plurality of evenly arranged on the inner wall of the air supply chamber, and the plurality of exhaust holes are synchronously corresponding to the air blowing port.

[0010] Preferably, the blower head is provided with a first insert, and the guide head is provided with a first slot that surrounds the guide column. The first insert can be inserted into the first slot and fitted with the guide column, and the first insert and the first slot are interference-fitted to detachably install the blower head on the guide head. The guide head is provided with a second insert, and the connecting seat is provided with a second slot that connects to the air supply chamber. The second insert can be inserted into the second slot, and the second insert and the second slot are interference-fitted to detachably install the guide head on the connecting seat.

[0011] Preferably, the connecting seat is provided with a cylindrical third insert, and the housing is provided with a third slot at the air outlet. The third insert can be inserted into the third slot and interference fit, so as to detachably install the connecting seat on the housing.

[0012] Preferably, the filter element is also detachably fitted with a nozzle tube, which extends away from the filter element and is used to connect the air inlet chamber to the outside.

[0013] Preferably, the housing has an internal cavity, and the control unit includes a circuit board and a developing lens; the side wall of the cavity has multiple light-transmitting holes, which can be combined to form various patterns / text / numbers; the developing lens is mounted on the housing and covers the multiple light-transmitting holes; the circuit board is mounted in the cavity and integrates multiple LEDs, each LED corresponding to one of the multiple light-transmitting holes; the alcohol sensor is mounted in the cavity and electrically connected to the circuit board.

[0014] Preferably, the side wall of the receiving cavity is also provided with a sound-emitting hole for connecting to the outside, and the control unit also includes a battery and a speaker; the battery and the speaker are both installed in the receiving cavity and electrically connected to the circuit board, and the speaker is set corresponding to the sound-emitting hole; the circuit board is also provided with an operation button and a charging port that penetrate through the housing to the outside.

[0015] Preferably, the housing includes a top shell and a bottom shell; the top shell has at least two first mounting holes and two first support pillars, the bottom shell has at least two second support pillars, and the circuit board has at least two second mounting holes; wherein, the two first support pillars can be aligned one-to-one with the two second mounting holes, and each first support pillar has a first screw, one end of which can pass through the second mounting hole and be threaded to the first support pillar, and the other end of which can abut against the circuit board to fix the circuit board to the top shell; the two second support pillars can be aligned one-to-one with the two first mounting holes, and each second support pillar has a second screw, one end of which can pass through the first mounting hole and be threaded to the second support pillar, and the other end of which can abut against the inner wall of the first mounting hole to connect the top shell and the bottom shell to each other and enclose the receiving cavity; the light-transmitting hole is formed on the top shell, and the top shell also has a storage groove that connects the light-transmitting hole and the first mounting hole, and the developing lens is installed in the storage groove and covers the light-transmitting hole and the first mounting hole.

[0016] (III) Beneficial Effects This invention provides a high-precision alcohol tester. By incorporating an air inlet chamber, a flow channel, and an air supply chamber within the filter element, it facilitates the flow of oral gas, ensuring that the oral gas passes normally through the filter element into the air outlet of the housing and contacts the alcohol sensor to complete alcohol content detection. Furthermore, by installing baffles and partitions at both ends of the flow channel, saliva is blocked and separated from the oral gas, and the oral gas is buffered, ensuring that the saliva-free oral gas contacts the alcohol sensor more evenly and stably. Therefore, compared to existing technologies, this solution reduces the possibility of saliva contaminating the alcohol sensor, ensuring detection accuracy and lifespan, and improving the user experience. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 A schematic diagram of the overall structure of this utility model is shown; Figure 2 It shows Figure 1 A schematic diagram of the decomposition process; Figure 3 A schematic diagram of the structure of the housing, control unit and alcohol sensor of this utility model is shown; Figure 4 It shows Figure 3 AA section view; Figure 5 It shows Figure 3 Decomposition diagram Figure 1 ; Figure 6 It shows Figure 3 Decomposition diagram Figure 2 ; Figure 7 A schematic diagram of the structure of the filter element of this utility model is shown; Figure 8 It shows Figure 7 The main view; Figure 9 It shows Figure 8 BB cross-sectional view; Figure 10 It shows Figure 7 Decomposition diagram Figure 1 ; Figure 11 It shows Figure 7 Decomposition diagram Figure 2 ; Figure 12 A schematic diagram of the structure of the blower head of this utility model is shown; Figure 13 A schematic diagram of the structure of the guide head of this utility model is shown.

[0018] In the diagram: 1. Housing, 10. Receiving cavity, 100. Air outlet, 101. Third slot, 102. Light transmission hole, 103. Sound outlet, 104. Storage slot, 11. Top shell, 111. First mounting hole, 112. First support pillar, 12. Bottom shell, 121. Second support pillar, 2. Control unit, 21. Circuit board, 210. LED bead, 211. Operation button, 212. Charging port, 213. Second mounting hole, 22. Developing lens, 23. Speaker, 3. Alcohol sensor, 4. Filter. 41. Air blower head, 410. Air inlet cavity, 4100. Air inlet channel, 411. Partition plate, 412. Fixing column, 4120. Air inlet hole, 413. First insert block, 42. Guide head, 420. Guide channel, 421. Baffle plate, 422. Guide column, 4220. Guide hole, 423. First slot, 424. Second insert block, 43. Connecting seat, 430. Air supply cavity, 431. Exhaust hole, 432. Vent hole, 433. Third insert block, 434. Second slot, 5. Nozzle tube. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this application. It is understood that the accompanying drawings are provided for reference and illustration only, and are not intended to limit this application. The connection relationships shown in the accompanying drawings are only for clear description and do not limit the connection method.

[0020] See appendix Figure 1 -Appendix Figure 2 and attached Figure 7 -Appendix Figure 13 A high-precision alcohol tester includes a housing 1, a control unit 2, an alcohol sensor 3, and a filter 4. The control unit 2 and the alcohol sensor 3 are installed inside the housing 1 and electrically connected to each other. The housing 1 has an air outlet 100 corresponding to the alcohol sensor 3. The filter 4 is installed on the housing 1 and has an air inlet 410, a flow channel 420, and an air supply 430 connected in sequence. The filter 4 also has partitions 411 and baffles 421 in the air inlet 410 and the air supply 430, respectively, to block the two ends of the flow channel 420. The air supply 430 is connected to the air outlet 100 and the outside.

[0021] Specifically, during use, first hold the housing 1 and start the control unit 2, then blow oral air into the air inlet 410. The oral air entering the air inlet 410 will be blocked by the baffle 411. After the saliva in the oral air comes into contact with the baffle 411, it will adhere to and remain on the baffle 411 to achieve saliva separation. The oral air after saliva separation continues to flow into the guide channel 420 until it comes into contact with the baffle 421 and is buffered and stabilized. The stabilized oral air then enters the air supply chamber 430 and is discharged to the air outlet 100 through the air supply chamber 430 to make normal contact with the alcohol sensor 3 to complete the alcohol content detection. After the alcohol detection, the excess gas will also be discharged to the outside. On the one hand, this can be used to maintain the air pressure balance inside and outside the filter 4, ensure smooth ventilation, and prevent oral air backflow. On the other hand, it can also prevent oral air from staying for a long time and reduce the possibility of residual saliva contacting the alcohol sensor 3.

[0022] In summary, this invention utilizes an air inlet chamber 410, a flow channel 420, and an air supply chamber 430 within the filter element 4 to facilitate the flow of oral gas. This ensures that the oral gas can pass normally through the filter element 4 into the air outlet 100 of the housing 1 and contact the alcohol sensor 3 to complete alcohol content detection. Furthermore, by providing baffles 411 and baffles 421 at both ends of the flow channel 420, respectively blocking and separating saliva from the oral gas and buffering the oral gas, this ensures that the saliva-free oral gas can contact the alcohol sensor 3 more evenly and stably. Therefore, compared to existing technologies, this solution reduces the possibility of saliva contaminating the alcohol sensor 3, thereby ensuring detection accuracy and service life, and improving the user experience.

[0023] See appendix Figure 7 -Appendix Figure 13 In some embodiments, the filter element 4 can be integrally formed or adopt a split structure. For ease of understanding, in this embodiment, the filter element 4 includes a blower head 41, a guide head 42, and a connecting seat 43; the air inlet cavity 410 is formed inside the blower head 41, the partition 411 is disposed inside the air inlet cavity 410 and fixed to the blower head 41, the guide channel 420 is formed inside the guide head 42, the partition 411 is fixed to the guide head 42, and the air supply cavity 430 is connected to the connecting seat 43. The receiving seat 43 is formed inward, and the side wall of the air supply chamber 430 is provided with an exhaust hole 431 that connects to the air blowing port 100 and a vent hole 432 that connects to the outside. The blower head 41 is detachably connected to the guide head 42 to connect the air inlet chamber 410 and the guide channel 420. The guide head 42 is detachably connected to the connecting seat 43 to connect the guide channel 420 and the air supply chamber 430. The connecting seat 43 is installed on the housing 1 and makes the air supply chamber 430 connect to the air blowing port 100.

[0024] Specifically, during assembly, the blower head 41, the guide head 42 and the connecting seat 43 are independently processed and formed, and then assembled in sequence to form the filter element 4. The connecting seat 43 of the filter element 4 is then installed on the housing 1 so that the air supply chamber 430 is connected to the air outlet 100. When in use, hold the housing 1 and start the control unit 2, then blow oral air into the air inlet 410 of the blower head 41. After the oral air is separated from saliva by the partition 411, it enters the air supply chamber 430 through the air guide channel 420. The oral air in the air supply chamber 430 enters the air blowing port 100 through the exhaust port 431 to contact the alcohol sensor 3 to complete the alcohol content detection, and then is discharged to the outside through the vent 432.

[0025] In summary, compared to the one-piece molded filter element 4, the above structural design is more convenient for manufacturers to open molds and produce without changing the working principle, thus reducing costs. At the same time, it also makes it easier for users to disassemble the filter element 4 for cleaning and maintenance, improving ease of use.

[0026] See appendix Figure 7 -Appendix Figure 13 The blower head 41 has a fixed column 412 in the air inlet cavity 410. The partition plate 411 is fixedly installed at the head end of the fixed column 412. The fixed column 412 also has an air inlet channel 4100 that connects to the guide channel 420. The side wall of the air inlet channel 4100 has an air inlet hole 4120 that is offset from the partition plate 411 and connects to the air inlet cavity 410. The guide head 42 has a guide column 422 inside. The baffle plate 421 is fixedly installed at the tail end of the guide column 422. The guide channel 420 is formed inside the guide column 422. The side wall of the guide channel 420 has a guide hole 4220 that is offset from the baffle plate 421 and connects to the air supply cavity 430. The air inlet channel 4100, the partition plate 411, the guide channel 420 and the baffle plate 421 are coaxially arranged.

[0027] Specifically, during use, the oral air entering the air inlet chamber 410 is first blocked by the baffle 411. After the saliva in the oral air comes into contact with the baffle 411, it adheres to and is separated from the baffle 411. The oral air after the saliva is separated moves away from the baffle 411 and flows into the air inlet channel 4100 and the guide channel 420 through the air inlet hole 4120. The oral air flowing out of the guide channel 420 is buffered and stabilized after contacting the baffle 421, and moves away from the baffle 421 and flows into the air supply chamber 430 through the guide hole 4220. The oral air in the air supply chamber 430 is discharged into the air outlet 100 and comes into contact with the alcohol sensor 3 before being discharged to the outside.

[0028] The air inlet channel 4100, baffle 411, guide channel 420, and baffle 421 are coaxial, and the air inlet hole 4120 and guide hole 4220 are staggered from the baffle 411 and baffle 421, respectively. This design allows the baffle 411 to more comprehensively block and separate saliva in the oral cavity air and reduce the possibility of saliva entering the guide channel 420 from the air inlet cavity 410, thus improving the saliva separation effect. At the same time, the baffle 421 can more comprehensively block and buffer the oral cavity air and allow the oral cavity air entering the air supply cavity 430 from the guide channel 420 to contact the alcohol sensor 3 more smoothly and stably, thus improving the detection accuracy.

[0029] See appendix Figure 7 -Appendix Figure 13 The air inlet 4120 is provided with multiple holes arranged in a circular array around the fixed column 412, the guide hole 4220 is provided with multiple holes arranged in a circular array around the guide column 422, and the exhaust hole 431 is provided with multiple holes evenly arranged on the inner wall of the air supply chamber 430, and the multiple exhaust holes 431 are synchronously corresponding to the air blowing port 100.

[0030] The design of multiple air inlets 4120 allows the oral gas separated from saliva in the air inlet chamber 410 to enter the air inlet channel 410 more easily, avoiding prolonged retention of oral gas and re-entraining saliva. The design of multiple guide holes 4220 allows the buffered oral gas to enter the air supply chamber 430 more evenly from the periphery of the guide column 422. The design of multiple exhaust holes 431 allows the oral gas in the air supply chamber 430 to enter the air outlet 100 more evenly and contact the alcohol sensor 3. Therefore, the above structural design can further improve the stability of oral gas flow.

[0031] See appendix Figure 7 -Appendix Figure 13Regarding the detachable connection between the blower head 41, the guide head 42, and the connecting seat 43, adhesive bonding, snap-fitting, or even screw fixing can be used. Since there are various detachable connection methods, this utility model does not impose any limitations on this. For ease of understanding, in this embodiment, the blower head 41 is provided with a first insert 413, and the guide head 42 is provided with a first slot 423 that surrounds the guide column 422. The first insert 413 can be inserted into the first slot 423 and fitted with the guide column 422. The first insert 413 and the first slot 423 are press-fitted to detachably mount the blower head 41. The first insert 413 and the second insert 424 are mounted on the flow guide head 42. The flow guide head 42 is provided with a second insert 424, and the connecting seat 43 is provided with a second slot 434 that connects to the air supply chamber 430. The second insert 424 can be inserted into the second slot 434, and the second insert 424 and the second slot 434 are interference-fitted to allow the flow guide head 42 to be detachably mounted on the connecting seat 43. Compared with other connection methods, the mating and insertion structure of the first insert 413 and the second insert 424 with the first slot 423 and the second slot 434 is simpler, which facilitates the early mold opening, processing and assembly and the later disassembly and maintenance, further improving the ease of use.

[0032] See appendix Figure 1 -Appendix Figure 2 and attached Figure 7 -Appendix Figure 13 In order to enrich the application scenarios, in this embodiment, the connecting seat 43 is provided with a cylindrical third insert 433, and the housing 1 is provided with a third slot 101 at the air outlet 100. The third insert 433 can be inserted into the third slot 101 and interference fit, so that the connecting seat 43 can be detachably installed on the housing 1. This design makes the filter element 4 and the housing 1 detachable from each other.

[0033] Specifically, when large-scale screening is required, the connecting seat 43 can be bent to disengage the third insert 433 from the third slot 101, so that the filter 4 can be removed from the housing 1, allowing multiple people to be inspected to blow air into the air outlet 100 one by one for preliminary testing and screening.

[0034] Once a suspected person is identified, the third insert block 433 is driven to insert into the third slot 101 to install the filter 4 onto the housing 1 and connect the air inlet 100. At this time, the suspected person blows air again for a more comprehensive and in-depth test, thereby identifying the actual intoxicated person.

[0035] Therefore, the above structural design allows staff to disassemble the filter element 4 and use the air outlet 100 of the housing 1 separately when dealing with large-scale screenings, which facilitates the rapid screening of suspected intoxicated individuals through preliminary screening. When dealing with small-scale screenings, the filter element 4 can be installed on the air outlet 100 of the housing 1 to improve detection accuracy and more accurately identify the actual intoxicated individuals from the suspected individuals. Thus, the combined use of the filter element 4 and the housing 1 can enrich practical application scenarios and improve ease of use.

[0036] It is important to note that during the initial screening process, the person being tested should keep their mouth a certain distance away from the housing 1 to avoid contact with the air outlet 100 and getting saliva on their mouth, thus preventing psychological resistance from the next person being tested. During the in-depth testing process, in order to improve the accuracy of the test, the person being tested needs to have their mouth in contact with the filter element 4. However, since the blower head 41, the guide head 42 and the connecting seat 43 are detachable from each other, the blower head 41, the guide head 42 or the entire filter element 4 can be replaced one by one as needed to prevent cross-infection caused by the user coming into contact with the saliva of others.

[0037] See appendix Figure 7 -Appendix Figure 11 In order to avoid frequent replacement of the filter element 4, in this embodiment, the filter element 4 is also detachably fitted with a nozzle tube 5, which extends away from the filter element 4 and is used to connect the air inlet cavity 410 and the outside.

[0038] Specifically, during the in-depth testing process, the mouthpiece 5 can be installed on the filter 4, and the person to be tested can directly hold the mouthpiece 5 in their mouth and blow air; when testing the next person, the mouthpiece 5 can be removed and discarded, and a new mouthpiece 5 can be replaced.

[0039] Furthermore, the mouthpiece 5 can be made of flexible materials such as silicone to facilitate oral contact and ensure comfort for the person being examined.

[0040] See appendix Figure 1 -Appendix Figure 6 Since control units 2 come in various types, and conventional control units 2 have limited functions and poor user experience, in this embodiment, the housing 1 has an internal cavity 10. The control unit 2 includes a circuit board 21 and a developing lens 22. The side wall of the cavity 10 has multiple light-transmitting holes 102, which can be combined to form various patterns / text / numbers. The developing lens 22 is mounted on the housing 1 and covers the multiple light-transmitting holes 102. The circuit board 21 is mounted in the cavity 10 and integrates multiple LED beads 210, which are designed to correspond one-to-one with the multiple light-transmitting holes 102. The alcohol sensor 3 is mounted in the cavity 10 and electrically connected to the circuit board 21.

[0041] Specifically, when the alcohol sensor 3 comes into contact with the oral gas, the circuit board 21 will analyze the signal data of the alcohol sensor 3 to determine the alcohol content in the oral gas. At the same time, the circuit board 21 will control the corresponding LED bead 210 to light up. The light formed passes through the corresponding light-transmitting hole 102 and is projected onto the developing lens 22 for display. This not only makes it convenient for staff and users to view the results, but also has a unique lighting effect, further improving the overall user experience.

[0042] It should be noted that by pre-setting the corresponding control program to the circuit board 21, multiple LED beads 210 can be made to light up in a specific order. When used in conjunction with the developing lens 22, a dynamic running light effect can be presented, making the product more technological. Since the relevant technology is relatively common in the field of electronics, its specific circuit structure will not be described in detail in this utility model.

[0043] Furthermore, the lamp bead 210 can be an LED lamp bead 210 to extend its service life and improve its lighting efficiency.

[0044] See appendix Figure 1 -Appendix Figure 6 The cavity 10 is also provided with a sound hole 103 for connecting to the outside. The control unit 2 also includes a battery (not shown in the figure) and a speaker 23. The battery and speaker 23 are both installed in the cavity 10 and electrically connected to the circuit board 21, and the speaker 23 is set corresponding to the sound hole 103. The circuit board 21 is also provided with an operation button 211 and a charging port 212 that penetrate the housing 1 to the outside.

[0045] Specifically, the battery powers the circuit board 21, enabling the LED 210, speaker 23, and alcohol sensor 3 to operate normally. The operation button 211 controls the power on / off, the charging port 212 charges the battery, and the speaker 23 can play power on / off prompts, test result prompts, etc., so that staff can directly learn about the test results by listening to the sound, further improving the user experience.

[0046] See appendix Figure 1 -Appendix Figure 6The housing 1 includes a top shell 11 and a bottom shell 12. The top shell 11 has at least two first mounting holes 111 and two first support pillars 112, the bottom shell 12 has at least two second support pillars 121, and the circuit board 21 has at least two second mounting holes 213. The two first support pillars 112 can be aligned with the two second mounting holes 213 one by one, and each first support pillar 112 is provided with a first screw (not shown in the figure). One end of the first screw can pass through the second mounting hole 213 and be threaded into the first support pillar 112, while the other end of the first screw can abut against the circuit board 21 to fix the circuit board 21 onto the top shell 11. The two pillars 121 can be aligned with the two first mounting holes 111 one by one, and each of the second pillars 121 is provided with a second screw (not shown in the figure). One end of the second screw can pass through the first mounting hole 111 and be threaded to the second pillar 121. The other end of the second screw can abut against the inner wall of the first mounting hole 111 to connect the top shell 11 and the bottom shell 12 to form a receiving cavity 10. The light-transmitting hole 102 is formed on the top shell 11. The top shell 11 is also provided with a storage groove 104 that connects the light-transmitting hole 102 and the first mounting hole 111. The developing lens 22 is installed in the storage groove 104 and covers the light-transmitting hole 102 and the first mounting hole 111.

[0047] Specifically, the above structural design allows the circuit board 21 to be quickly installed onto the top shell 11 for fixation, and allows the top shell 11 to be quickly installed onto the bottom shell 12 for assembly, which saves assembly time and reduces assembly costs. At the same time, the design of installing the developing lens 22 into the storage slot 104 and covering the light-transmitting hole 102 and the first mounting hole 111 can also hide the second screw, making the overall appearance more aesthetically pleasing.

[0048] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-precision alcohol tester, comprising a housing, a control unit and an alcohol sensor electrically connected to each other and installed within the housing, wherein the housing has an air inlet corresponding to the alcohol sensor, characterized in that, Also includes: The filter element is installed on the housing and has an air inlet chamber, a flow channel and an air supply chamber connected in sequence. The filter element also has partitions and baffles in the air inlet chamber and the air supply chamber to block the beginning and end of the flow channel. The air supply chamber is connected to the air outlet and the outside. In this process, the oral gas entering the air inlet cavity contacts the partition to separate saliva. The oral gas after saliva separation enters the guide channel and contacts the baffle to be buffered and stabilized. The stabilized oral gas enters the air supply cavity and is discharged to the air outlet or discharged to the outside through the air supply cavity.

2. The high-precision alcohol tester according to claim 1, characterized in that, The filter element includes a blower head, a guide head, and a connecting seat; the air inlet cavity is formed inside the blower head, the partition is disposed inside the air inlet cavity and fixed to the blower head, the guide channel is formed inside the guide head, the partition is fixed to the guide head, and the air supply cavity is formed inside the connecting seat, and the side wall of the air supply cavity is provided with an exhaust hole connecting to the air outlet and a vent hole connecting to the outside; the blower head is detachably connected to the guide head to connect the air inlet cavity and the guide channel, the guide head is detachably connected to the connecting seat to connect the guide channel and the air supply cavity, and the connecting seat is installed on the housing so that the air supply cavity connects to the air outlet.

3. A high-precision alcohol tester according to claim 2, characterized in that, The blower head has a fixed column in the air inlet cavity, the partition is fixedly installed at the head end of the fixed column, the fixed column also has an air inlet channel that connects to the guide channel, and the side wall of the air inlet channel has an air inlet hole that is offset from the partition and connects to the air inlet cavity; the guide head has a guide column inside, the baffle is fixedly installed at the tail end of the guide column, the guide channel is formed inside the guide column, and the side wall of the guide channel has a guide hole that is offset from the baffle and connects to the air supply cavity; the air inlet channel, the partition, the guide channel and the baffle are coaxially arranged.

4. A high-precision alcohol tester according to claim 3, characterized in that, The air inlet is provided with multiple holes arranged in a circular array around the fixed column, the guide hole is provided with multiple holes arranged in a circular array around the guide column, and the exhaust hole is provided with multiple holes evenly arranged on the inner wall of the air supply chamber, and the multiple exhaust holes are synchronously corresponding to the air blowing port.

5. A high-precision alcohol tester according to claim 3, characterized in that, The blower head is provided with a first insert, and the guide head is provided with a first slot that surrounds the guide column. The first insert can be inserted into the first slot and the guide column is sleeved thereon. The first insert and the first slot are press-fitted to detachably install the blower head on the guide head. The guide head is provided with a second insert, and the connecting seat is provided with a second slot that connects to the air supply chamber. The second insert can be inserted into the second slot, and the second insert and the second slot are press-fitted to detachably install the guide head on the connecting seat.

6. A high-precision alcohol tester according to claim 2, characterized in that, The connector is provided with a cylindrical third insert, and the housing is provided with a third slot at the air outlet. The third insert can be inserted into the third slot and interference fit, so as to detachably install the connector onto the housing.

7. A high-precision alcohol tester according to claim 1, characterized in that, The filter element is also detachably fitted with a nozzle tube, which extends away from the filter element and is used to connect the air inlet chamber to the outside.

8. A high-precision alcohol tester according to claim 1, characterized in that, The housing has an internal cavity, and the control unit includes a circuit board and a developing lens. The sidewall of the cavity has multiple light-transmitting holes, which can be combined to form various patterns, text, or numbers. The developing lens is mounted on the housing and covers the multiple light-transmitting holes. The circuit board is installed inside the cavity and integrates multiple LEDs, each corresponding to one of the multiple light-transmitting holes. The alcohol sensor is installed inside the cavity and electrically connected to the circuit board.

9. A high-precision alcohol tester according to claim 8, characterized in that, The side wall of the cavity is also provided with a sound-emitting hole for connecting to the outside. The control unit also includes a battery and a speaker. The battery and the speaker are both installed in the cavity and electrically connected to the circuit board, and the speaker is set corresponding to the sound-emitting hole. The circuit board is also provided with operation buttons and a charging port that penetrate through the housing to the outside.

10. A high-precision alcohol tester according to claim 8, characterized in that, The housing includes a top shell and a bottom shell; the top shell has at least two first mounting holes and two first support columns, the bottom shell has at least two second support columns, and the circuit board has at least two second mounting holes; The two first pillars are aligned one-to-one with the two second mounting holes, and each first pillar is provided with a first screw. One end of the first screw can pass through the second mounting hole and be threaded to the first pillar, and the other end of the first screw can abut against the circuit board to fix the circuit board to the top shell. The two second pillars are aligned one-to-one with the two first mounting holes, and each second pillar is provided with a second screw. One end of the second screw can pass through the first mounting hole and be threaded to the second pillar, and the other end of the second screw can abut against the inner wall of the first mounting hole to connect the top shell and the bottom shell to each other and enclose them to form the receiving cavity. The light-transmitting hole is formed on the top shell, and the top shell is also provided with a storage groove that connects the light-transmitting hole and the first mounting hole. The developing lens is installed in the storage groove and covers the light-transmitting hole and the first mounting hole.

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