CN210168832U

CN210168832U - Plant protection machinery, intelligent medical kit and measurement assembly thereof

Info

Publication number: CN210168832U
Application number: CN201822273946.1U
Authority: CN
Inventors: Zhang Chen; 陈章
Original assignee: Guangzhou Xaircraft Technology Co Ltd
Current assignee: Guangzhou Xaircraft Technology Co Ltd
Priority date: 2018-12-29
Filing date: 2018-12-29
Publication date: 2020-03-24
Anticipated expiration: 2028-12-29

Abstract

The utility model relates to a plant protection equipment field discloses a plant protection machinery, intelligent medical kit and measurement element thereof, and this measurement element has mainboard (302) that hold chamber (301) and install in this chamber (301) that holds, and this mainboard (302) are connected with level sensor (303) electricity that extends to the medical kit originally internally, measurement element be equipped with hold chamber (301) isolated airflow channel, this airflow channel sets up to making the inner chamber and the exterior space intercommunication of medical kit body. The utility model discloses the integrated setting of airflow channel that will be used for ventilating is on measuring assembly to through making this airflow channel and the chamber (301) that holds of installation mainboard (302) isolated and avoid liquid medicine moisture contact mainboard, reduced the complexity of intelligent medical kit.

Description

Plant protection machinery, intelligent medical kit and measurement assembly thereof

Technical Field

The utility model relates to a plant protection equipment field specifically relates to a measuring component of intelligence medical kit. On this basis, the utility model discloses still relate to an intelligence medical kit and have plant protection machinery of this intelligence medical kit.

Background

With the development of agricultural technologies, plant protection machines such as plant protection unmanned aerial vehicles are increasingly applied to scaled operations such as pesticide spraying. Wherein, the plant protection unmanned aerial vehicle who is equipped with intelligent medical kit can real time monitoring current dose to realize rationally planning the operation route, return intelligent operation such as adding medicine in good time.

Chinese utility model patent CN207991649U discloses a liquid reserve tank (intelligent medical kit) that can be used to plant protection machinery is equipped with level sensor, and this level sensor triggers the magnetic switch of different height position departments through making the float along with the change of liquid level to the liquid level in the precision measurement liquid reserve tank. The liquid level sensor is integrated on the liquid storage tank cover, the liquid storage tank cover comprises an upper cover and a lower cover which are limited with an accommodating space, and a processor connected with the liquid level sensor is arranged in the accommodating space, so that the liquid level sensor can be assembled and disassembled along with the cover body.

Chinese utility model patent CN206221748U discloses a medical kit that can be used to plant protection unmanned aerial vehicle, this medical kit have and are used for ventilative valve (ventilation structure), including valve gap, valve body and the breather pipe of connection on this valve body, this valve can keep the inside and outside atmospheric pressure balance of medical kit.

The above prior art has drawbacks. On one hand, under the condition that the liquid level sensor is integrated in the liquid tank cover, in order to open and close a processor electrically connected with the liquid level sensor, an operator needs to open an upper cover of the liquid tank cover, and the integrated liquid level sensor acts together when the liquid tank cover is opened and closed, so that the liquid level sensor is inconvenient to use; on the other hand, in order to achieve air pressure balance inside and outside the medicine box, the liquid level sensing element needs to be arranged separately from the ventilation structure so as to prevent moisture discharged by the ventilation structure from damaging electronic devices required for liquid level sensing, which increases the manufacturing cost and structural complexity of the intelligent medicine box.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the problem that the intelligence medical kit structure is complicated that prior art exists, providing a measuring component of intelligence medical kit, this measuring component is integrated has the medical kit subassembly of ventilating to can avoid liquid medicine moisture and mainboard contact.

In order to achieve the above object, an aspect of the utility model provides a measurement element of intelligence medical kit, this measurement element have hold the chamber and install the mainboard in this holds the chamber, and this mainboard is connected with the level sensor electricity that extends to the medical kit originally internally, measurement element be equipped with hold the isolated air flow channel in chamber, this air flow channel sets up to making the inner chamber and the exterior space intercommunication of medical kit body.

Preferably, the measuring assembly includes an upper housing, a lower housing, and a sensor casing extending from the lower housing, the upper housing being sealingly connected to the lower housing to form the receiving chamber, the level sensor extending through the lower housing into the sensor casing.

Preferably, the lower case is provided with a connecting pipe located outside the accommodating chamber and formed with the air flow passage, and the connecting pipe is connected with a breather pipe communicated to the inside of the medicine box body.

Preferably, an escape groove is formed at a periphery of the upper case, and the connection pipe extends through the escape groove.

Preferably, one end of the vent pipe is connected to the connecting pipe, the other end of the vent pipe is connected to the lower casing and communicates with the inner chamber of the medicine box body, and a middle portion between both ends of the vent pipe extends spirally and has at least one complete spiral.

Preferably, the vent tube is a flexible tube and is connected by a collar to form the complete spiral.

Preferably, a side peripheral edge of the lower housing facing the upper housing is formed with an annular groove, and the upper housing is sealingly connected to the lower housing by a seal ring received in the annular groove.

Preferably, the measuring assembly comprises a float guide rod extending parallel to the sensor cartridge, the float guide rod being sheathed with a float for triggering the level sensor.

The utility model discloses the second aspect provides an intelligent medical kit with above-mentioned measuring component.

The utility model discloses the third aspect provides a plant protection machinery, and this plant protection machinery has above-mentioned intelligent medical kit.

Through the technical scheme, the utility model discloses the airflow channel integration setting that will be used for ventilating is on measuring component to through making this airflow channel and the installation mainboard hold the chamber isolated and avoid liquid medicine moisture contact mainboard, reduced the complexity of intelligent medical kit.

Drawings

Fig. 1 is a schematic disassembled structure diagram of an intelligent medicine chest according to a preferred embodiment of the invention;

FIG. 2 is a schematic view of a cover and a measuring assembly;

FIG. 3 is an exploded view of the mating structure of the cover and the measurement assembly of FIG. 2;

fig. 4 is an enlarged view of a portion a in fig. 3;

FIG. 5 is a perspective view of the cover of FIG. 3;

FIG. 6 is a schematic structural view of a measurement assembly according to a preferred embodiment of the present invention;

FIG. 7 is a schematic view of the measurement assembly of FIG. 6 from another perspective with the vent tube removed;

FIG. 8 is a schematic structural view of an upper housing of the measurement assembly of FIG. 6;

FIG. 9 is a schematic structural view of the lower housing and base shroud segment of the measurement assembly of FIG. 6;

fig. 10 is a schematic structural view of a (spliced) cartridge section of the measuring assembly of fig. 6.

Description of the reference numerals

1-a medicine box body; 11-mounting holes; 2-a cover body; 21-a vent hole; 22-a central through hole; 23-a large diameter section; 231-a recess; 232-a convex part; 24-a small diameter section; 3-a measuring assembly; 301-a containment chamber; 302-a main board; 303-a liquid level sensor; 304-an upper housing; 3041-a boss; 3042-avoidance groove; 3043-sinking the tank; 3044-a cover support; 3045-a housing connection part; 305-a lower housing; 3051-connecting tube; 3052-an annular groove; 3053-a communicating tube; 3053 a-a gap; 306-a sensor cartridge; 3061-protecting the cylinder section; 3062-threaded part; 3063-a retaining groove; 3064-outer teeth; 306 a-a base shroud segment; 306 b-splicing the protective cylinder section; 306 c-a bottom end cartridge guard section; 307-a snorkel; 308-key circuit board; 309-spring thimble connector; 310-a float guide; 311-a float; 312-a sealing ring; 313-waterproof silica gel; 314-a first threaded fastener; 315-key pad pasting; 316-a second threaded fastener; 317-card holder; 318-threaded end cap; 319-limit piece; 3191-internal teeth.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.

In the present invention, without being stated to the contrary, the use of the terms of orientation such as "top, bottom" and the like generally refer to the orientation shown with reference to fig. 1, for example, the top of the measuring assembly 3 is the portion of the measuring assembly 3 close to the cover 2; the bottom of the measuring component 3 is a part of the measuring component 3, which extends into the medicine box body 1 and is close to the bottom of the medicine box (in an installation state). Similarly, use of the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

In the following description, reference will be made to a number of technical improvements to intelligent medicine boxes and their components, which may be used in combination, in whole or in part, in an appropriate manner. It is understood that although the following description will mainly be developed around a preferred embodiment intelligent medicine chest, these descriptions will help to better understand the technical solution of the present invention, but are not intended to limit the scope of the present invention, and the related structure and connection relationship can be simply modified to obtain other modified technical solutions without departing from the technical idea of the present invention. For example, in order to solve the problem of the complicated structure caused by the separate arrangement of the liquid level sensing element and the vent structure, the cover body referred to in the following description may be omitted, which falls within the scope of the present invention.

Fig. 1 shows that can be used to like plant protection machinery's such as plant protection unmanned aerial vehicle intelligent medical kit, including medical kit body 1, lid 2 and measuring component 3. The medicine box body 1 may be formed into a structure having a substantially inverted L-shaped cross section to have a relatively large volume and be able to be conveniently mounted to the unmanned aerial vehicle body. The lid body 2 and the measurement assembly 3 can be attached to the attachment hole 11 formed on the medicine box body 1. The attachment hole 11 is generally formed in the top wall of the medicine box body 1 as a liquid inlet for injecting the liquid medicine. When the chemical liquid in the medicine box body 1 is completely sprayed or less than a predetermined amount, the lid body 2 and the measuring unit 3 can be detached, and the chemical liquid can be injected through the mounting hole 11.

As shown in fig. 1 and 2, in the mounted state, the measurement component 3 may extend into the medicine box body 1 through the mounting hole 11, so as to measure parameters such as the liquid level and the temperature of the liquid medicine in the medicine box body in real time. The lid body 2 is connected to the mounting hole 11 and press-fixes the measurement assembly 3 to (in the mounting hole 11 of) the medicine-box body 1. Typically, the outer peripheral wall of the mounting hole 11 of the medicine-box body 1 may be formed with an external thread, and the inner peripheral wall of the lid body 2 may be formed with an internal thread, whereby the measurement member 3 can be press-fixed and close the mounting hole 11 by screwing the lid body 2 to the mounting hole 11. In other alternative embodiments, the cover 2 may be connected to the mounting hole 11 by snapping or the like.

In this preferred embodiment, the present invention makes the cover body 2 of the intelligent medicine box and the measuring unit 3 set relatively independently (the measuring unit 3 is not integrated in the medicine box cover), so that the measuring unit 3 can be inserted or pulled out along the axial direction of the mounting hole 11 when being detached, and then the cover body 2 is pressed and fixed. This can prevent the measuring unit 3 from rotating together with the cover 2 when the cover is tightened, and can easily attach and detach the respective members. Simultaneously, at the dismouting in-process, can avoid measuring set 3 to stir the liquid medicine in medical kit body 1 along with the lid 2 rotates to reduce this measuring set 3 because of the liquid medicine impact causes the possibility of deformation, damage, measurement scheduling problem inaccurate.

Referring to fig. 2 to 10, the measurement unit 3 of the intelligent medicine box may be roughly divided into a liquid level sensing module (which protrudes into the medicine box body 1) for sensing information on the medicine liquid and a data processing module for receiving and processing the information on the medicine liquid, the liquid level sensing module may include a liquid level sensor 303 extending into the medicine box body 1, and the data processing module may be provided with a main board 302 and the like electrically connected to the liquid level sensor 303. Since the level sensor 303 needs to be energized during operation, the main board 302 and the level sensor 303 should be prevented from contacting the chemical solution.

Meanwhile, in order to enable the liquid medicine in the medicine box body 1 to be smoothly sprayed outwards, a medicine box ventilation structure can be arranged and used for keeping the pressure balance between the inner cavity of the medicine box body 1 and the external space. In the prior art, the liquid level sensing element and the medicine box ventilation structure are separately arranged, so that the situation that liquid medicine moisture carried by the medicine box ventilation structure exhausts damages electronic devices such as the main board 302 can be well avoided, and the manufacturing cost and the structural complexity of the intelligent medicine box are increased.

For this reason, in a preferred embodiment of the present invention, the medicine box ventilation structure can be integrally disposed on the measurement component 3, and the medicine liquid moisture is prevented from contacting the main board 302 by disposing the main board 302 and the airflow channel on the premise of reducing the structural complexity. Specifically, the measurement block 3 may have an upper case 304 and a lower case 305, the upper case 304 being hermetically connected to the lower case 305 to form a housing chamber 301, and the main board 302 being mounted in the housing chamber 301. The medicine box ventilating structure may have an air flow passage for ventilation, and as long as the air flow passage is isolated from the accommodating chamber 301, the medicine liquid moisture is prevented from contacting the main board 302. Through will be used for the air current channel integration setting of ventilating on measuring component 3 to avoid liquid medicine moisture to contact the mainboard through making this air current channel and the chamber 301 that holds of installation mainboard 302 isolated, reduced the complexity of intelligent medical kit.

In the illustrated embodiment, as shown in fig. 3, 6 to 9, the lower case 305 may have an edge portion for seating on the mounting hole 11 of the medicine-box body 1, the edge portion forming a cavity around, constituting a main body portion of the accommodating chamber 301. This lower casing 305 is equipped with connecting pipe 3051, and this connecting pipe 3051 has and holds the isolated air current passageway in chamber 301 to make the inner chamber and the exterior space intercommunication of medical kit body 1, keep medical kit body 1's inner chamber and exterior space pressure balance from this, the liquid medicine can smoothly be discharged. Simultaneously, through setting up the integration of medical kit ventilation structure on measuring subassembly 3, need not to set up the bleeder vent in addition on the medical kit body, can will realize annotating liquid, measure and ventilative structure and set up in the mounting hole 11 as annotating the liquid hole jointly, reduced the structural complexity of intelligent medical kit.

However, when the air is introduced through the connection pipe 3051 of the lower case 305 to maintain the air pressure balance between the inside and the outside of the medicine-box body 1, the medicine liquid in the medicine-box body 1 may overflow from the connection pipe 3051 due to vibration or the like. Therefore, the vent pipe 307 may be connected to the side of the connection pipe 3051 facing the inside of the medicine box body 1, so that even if the medicine liquid in the medicine box body 1 is splashed during operation, the medicine liquid cannot directly overflow to the outside space through the connection pipe 3051. In a preferred embodiment of the present invention, the vent tube 307 has at least one complete spiral. As shown in fig. 6 and 7, the lower case 305 may be provided with the aforementioned nipple 3051 and a communicating tube 3053 spaced from the nipple 3051, one end of the breather tube 307 is connected to the nipple 3051, the other end is connected to the communicating tube 3053 and communicates with the inner chamber of the medicine box body 1 through the communicating tube 3053, and a middle portion between the both ends extends spirally and is provided with at least one complete spiral. Therefore, if the liquid medicine splashes into the vent pipe 307 at the communication pipe 3053, the liquid medicine may overflow from the connection pipe 3051 by further passing through the spiral top against gravity, and this arrangement can effectively reduce the possibility of the liquid medicine overflowing. The vent pipe 307 may be a flexible pipe made of, for example, rubber, and connected by a collar to form a complete spiral. By a tie is herein meant a connecting element capable of bundling two or more pipe sections together.

The breather pipe 307 can communicate with the inner cavity of the medicine tank body 1 at the communication pipe 3053 in various existing manners. In the configuration shown in fig. 7, a notch 3053a is formed in the side wall of the communication pipe 3053, and the vent pipe 307 is inserted into the communication pipe 3053 and supported by a projection structure (not shown) at the root position of the communication pipe 3053, so that the inner chamber of the medicine box body 1 can be communicated through the notch 3053 a.

At the other end of the connection pipe 3051, the outside space can be communicated through the vent hole 21 in the lid body 2. As shown in fig. 5, the lid body 2 may have a large diameter portion 23 and a small diameter portion 24 that are axially connected, an internal thread that is screwed into the mounting hole 11 of the medicine-box body 1 may be formed on an inner peripheral wall of the large diameter portion 23, and a recessed portion 231 and a protruding portion 232 that are alternately arranged may be formed on an outer peripheral wall, and an operator may screw the lid body 2 by the protruding portion 232 to attach and detach it. The vent hole 21 is formed in the small diameter portion 24. Thus, when the liquid medicine overflows through the vent hole 21, since the large diameter portion 23 is larger than the outer diameter of the small diameter portion 24, the liquid medicine can be prevented from flowing to the radial surface of the convex portion 232 to some extent, thereby reducing the possibility of the operator contacting the liquid medicine.

Fig. 8 shows the upper housing 304 of a preferred embodiment of the measuring assembly 3. The upper housing 304 has a cover supporting portion 3044, a housing connecting portion 3045 and a protruding portion 3041, and the protruding portion 3041 is formed with a sinking groove 3043 for mounting the key circuit board 308.

As shown in fig. 3, 6, 8 and 9, the upper housing 304 is detachably and hermetically connected to the lower housing 305 so as to maintain the sealing performance of the accommodating chamber 301 and to enable replacement of components such as batteries and the like in the accommodating chamber 301. Specifically, the circumferential edge of the side of the lower case 305 facing the upper case 304 may be formed with an annular groove 3052, a sealing ring 312 is disposed in the annular groove 3052, and the upper case 304 is pressed against the sealing ring 312 and fixed to the lower case 305 by a second threaded fastener 316 penetrating through the case coupling portion 3045.

The case coupling portion 3045 of the upper case 304 may be formed with an escape groove 3042, and the connection pipe 3051 on the lower case 305 may extend through the escape groove 3042. By providing the escape groove 3042, it is possible to facilitate the connection pipe 3051 to pass through the upper case 304 to ventilate the external space. In some embodiments, the relief groove 3042 may be replaced with a through hole formed in the upper housing 304, but because it is located near the edge, it is weak and easily damaged. In addition, during installation, the avoiding groove 3042 and the connecting pipe 3051 can quickly determine the circumferential relative position of the upper shell 304 and the lower shell 305, which is convenient for improving installation efficiency.

The cover 2 may have a central through hole 22 at a position corresponding to the boss 3041 of the upper case 304. In the installed state, the cover 2 covers the upper housing 304 such that the protruding portion 3041 extends into the central through hole 22, and the inner side of the end wall of the cover 2 is supported by the cover supporting portion 3044 to press and fix the measuring assembly 3.

The key circuit board 308 may be secured within the countersunk recess 3043 by a first threaded fastener 314. In order to ensure the sealing of the accommodating cavity 301, a waterproof silicone rubber 313 may be disposed on a side of the key circuit board 308 facing the accommodating cavity 301. The key circuit board 308 can be electrically connected to the main board 302 through the spring pin connector 309, so that the key can be operated through the central through hole 22 of the cover 2, and the start-stop operation of the measuring assembly 3 can be realized without detaching the cover 2. The side of the key circuit board 308 away from the accommodating cavity 301 may also be provided with a waterproof silicone 313, and the top surface of the protruding portion 3041 is provided with a key film 315 to improve the aesthetic property and the operation feel.

The measurement unit 3 senses a liquid level change in the medicine tank body 1 by a liquid level sensor 303 electrically connected to the main board 302. The level sensor 303 may be formed in a variety of suitable forms. Typically, the level sensor 303 may include a circuit board and a plurality of magnetic switches disposed on the circuit board that may be triggered by a float 311, described later, to obtain a corresponding level signal. In order to avoid the liquid medicine contact in energization element and the medical kit body 1, the utility model discloses utilize the sensor to protect a 306 with level sensor 303 isolated with the liquid medicine, level sensor 303 can set up in this sensor protects a 306. For example, the circuit board provided with the magnetic switch may be a bar shape and extend into the sensor casing 306.

For the elongated structure of the sensor casing 306, the integral molding may result in high mold opening cost. In a preferred embodiment of the present invention, the sensor cartridge 306 is configured to include a plurality of cartridge sections 3061, as shown in fig. 3 and 10. Thus, each shroud segment 3061 can be separately formed and interconnected to form the desired sensor shroud 306. With this arrangement, the length of the sensor casing 306 formed by the connection can be selected according to the size (depth) of the fitted medicine box body 1, and the adaptability is high.

The plurality of shroud segments 3061 can have the same or different lengths. In the illustrated preferred embodiment, the sensor shroud 306 includes a base shroud segment 306a, a transition shroud segment 306b, and a bottom shroud segment 306 c. The base cylinder protecting section 306a and the lower shell form a whole, the bottom end of the base cylinder protecting section 306a is connected with one or more continuous cylinder protecting sections 306b, and the section 306a far away from the base cylinder protecting section 306b of the continuous cylinder protecting section 306b is connected with a bottom end cylinder protecting section 306 c. To facilitate connection and ensure good sealing, the end of each of the cylindrical guard sections 3061 may be formed with a threaded portion 3062, for example, the continuous cylindrical guard section 306b may have an internal thread at one end and an external thread at the other end, so as to prevent the liquid medicine from entering the sensor cylindrical guard 306 through the connection site by the sealing property of the threaded connection itself.

The level sensor 303 in the sensor casing 306 can be triggered by a float 311 which rises and falls with the amount of the liquid medicine, and the float 311 can be kept spaced from the level sensor 303 in a proper manner to ensure the measurement accuracy. In the illustrated embodiment, the measuring assembly 3 comprises a float guide 310 extending parallel to the sensor cartridge 306, the float 311 being slidingly sleeved on the float guide 310.

The float guide rod 310 may be a stainless steel hollow tube to reduce the rate of erosion of the liquid medicine. One end of the float guide rod 310 is provided with a clamp 317, and the other end is provided with a limit piece 319 with a circumferential limit structure, so that the float guide rod can have better assembly performance and measurement accuracy. A stop groove 3063 is provided at a position of the base cylinder protecting section 306a corresponding to the top end portion of the float guide rod 310, and the clip can be stopped in the stop groove 3063; a circumferential limiting structure matched with the limiting piece 319 is formed on the outer circumferential wall of the bottom end cylinder protecting section 306c, so that the circumferential relative position of the float guide rod 310 and the sensor cylinder protecting 306 can be limited, the bottom end of the float guide rod 310 is prevented from rotating around the central axis of the sensor cylinder protecting 306, the float 311 is kept floating up and down in the direction parallel to the central axis of the sensor cylinder protecting 306, and high measurement accuracy is guaranteed.

The circumferential limiting structure of the bottom end protecting cylinder segment 306c and the limiting member 319 can be an external tooth portion 3064 formed on the outer circumferential surface of the bottom end protecting cylinder segment 306c and an internal tooth portion 3191 formed on the limiting member 319, as shown in fig. 4. Thus, for convenience of assembly, a through hole and a blind hole may be formed in the stopper 319 to extend in parallel at a distance from each other, the internal tooth portion 3191 is formed in the through hole, the float guide 310 is inserted into the blind hole, and the stopper 319 may be fixed by a screw cap 318 connected to the bottom end of the sensor casing 306. During assembly, the plurality of cylinder protecting sections 3061 may be connected to form the sensor cylinder protecting 306, the limiting member 319 is sleeved on the bottom cylinder protecting section 306c, the circumferential limiting structures are matched with each other, and then the threaded end cap 318 is screwed to the bottom end of the sensor cylinder protecting 306 to clamp and fix the limiting member and close the bottom opening (if any) of the sensor cylinder protecting 306. Then, the bottom end of the float guide 310 to which the clip 317 is connected is inserted into the blind hole of the stopper 319, and the clip 317 is held by the locking groove 3063 on the sensor sheath 306.

In order to perform the plant protection work more favorably, the liquid level in the medicine box body 1 may be monitored, and the temperature of the liquid medicine may be monitored by the measuring unit 3. To this end, a temperature sensor may be provided at a location of the bottom end of the sensor casing 306, for example, the temperature sensor may be provided at the bottom casing section 306 c.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto. Within the technical concept of the present invention, the present invention can be modified in a variety of ways, for example, the housing for forming the accommodating chamber 301 is not necessarily split into the upper housing 304 and the lower housing 305, the setting position of the connecting pipe 3051 can also be passed through the accommodating chamber 301 to extend, and the like, and these simple modifications further include each specific technical feature to be combined in any suitable manner. In order to avoid unnecessary repetition, the present invention does not separately describe various possible combinations. These simple variations and combinations should also be considered as disclosed in the present invention, all falling within the scope of protection of the present invention.

Claims

1. A measurement assembly of an intelligent medicine box, the measurement assembly having a containing cavity (301) and a main board (302) installed in the containing cavity (301), the main board (302) being electrically connected with a liquid level sensor (303) extending into a medicine box body, characterized in that the measurement assembly is provided with an air flow channel isolated from the containing cavity (301), the air flow channel being arranged to enable an inner cavity of the medicine box body to communicate with an external space,

the measuring assembly comprises an upper shell (304), a lower shell (305) and a sensor protective cylinder (306) extending from the lower shell (305), wherein the upper shell (304) is connected to the lower shell (305) in a sealing mode to form the accommodating cavity (301), the liquid level sensor (303) penetrates through the lower shell (305) to extend into the sensor protective cylinder (306), and the lower shell (305) is provided with a connecting pipe (3051) which is located outside the accommodating cavity (301) and is formed with the airflow channel.

2. A measurement assembly of a smart medicine box according to claim 1, characterized in that a snorkel (307) communicating into the medicine box body is connected to the connection tube (3051).

3. The measurement assembly of a smart medicine box according to claim 1, wherein the periphery of the upper housing (304) is formed with an avoidance slot (3042), the connection tube (3051) extending through the avoidance slot (3042).

4. A measurement assembly for a smart medicine box according to claim 2, wherein the vent pipe (307) is connected at one end to the connection pipe (3051) and at the other end to the lower housing (305) and communicates with the inner cavity of the medicine box body, and the middle portion between the two ends of the vent pipe (307) extends spirally and has at least one complete spiral.

5. A measurement assembly for a smart medicine box according to claim 4, wherein the ventilation tube (307) is a flexible tube and is connected by a collar to form the complete spiral.

6. The measurement assembly of a smart medicine box according to any one of claims 1 to 5, characterized in that a side peripheral edge of the lower case (305) facing the upper case (304) is formed with an annular groove (3052), and the upper case (304) is sealingly connected to the lower case (305) by a seal ring (312) received in the annular groove (3052).

7. A measuring assembly of a smart medicine box according to any one of claims 1 to 5, characterized in that the measuring assembly comprises a float guide rod (310) extending in parallel with the sensor pod (306), the float guide rod (310) being sleeved with a float (311) for triggering the level sensor (303).

8. An intelligent medicine kit, characterized in that it is provided with a measuring assembly according to any one of claims 1 to 7.

9. A plant protection machine, characterized in that it has a smart medicine chest according to claim 8.