CN219495439U - Air quality demonstration instrument - Google Patents

Abstract

The utility model discloses an air quality demonstration instrument which comprises an electric air charging device, an air container, an electronic scale and a protective cover, wherein the air container is a rigid piece and is communicated with the electric air charging device, the air container and the electric air charging device are both arranged on the electronic scale, the protective cover is made of transparent materials, the electric air charging device, the air container and the electronic scale are all arranged in the protective cover, the demonstration instrument starts the electric air charging device to charge air into the air container through a remote controller, and students can recognize that the air is of quality by observing the change of the numerical value of the electronic scale after the air is continuously charged. The operation is simple and convenient, the inflation process is rapid and time-saving, the volume of the air container cannot be changed, and the influence of air buoyancy on the test can be effectively avoided; the electronic scale and the transparent protective cover are adopted to facilitate the observation of the experimental process; the protection cover can avoid damage or injury of a tester caused by accidents.

Description

Air quality demonstration instrument

Technical Field

The utility model relates to the technical field of teaching experiment devices, in particular to an air quality demonstration instrument.

Background

The fifth lesson of the second unit of the new university edition science for three years proposes "what is the quality of a bag of air? "during teaching, students are required to test to measure the change of the container along with the inflation amount of the air in the container, the weight of the container is changed along with the change of the container, and the fact that the air is of quality is further confirmed. The existing air quality measurement test uses a ball, an inflator and a balance, when in use, the balls with different 'cylinder numbers' of air are driven into the ball, the balls are put on a hanging type simple balance for measurement in a separated mode, and mung beans are used as weights to sense the air quality change in the ball. First, the air mass is small, and it takes a long time to inject more air to significantly observe the change in the weight of the container. Secondly, the rubber ball is used as an air container, the air quantity which can be stored is limited, the limited inflation quantity possibly causes no obvious change of the weight of the container, the volume of the rubber ball is greatly changed during inflation, and the rubber ball is more difficult to observe the obvious change of the weight of the container under the influence of air buoyancy or the influence of factors such as the flow of surrounding air and friction at the rotating shaft of a balance beam. The test operation process is tedious and time-consuming, and the test effect is not intuitively obvious.

Disclosure of Invention

The utility model aims to provide an air quality demonstration instrument which is simple to operate and visual in test effect and aims at the defects in the prior art.

In order to achieve the aim of the utility model, the utility model adopts the following technical scheme:

the electronic scale comprises an electric inflating device, an air container, an electronic scale and a protective cover, wherein the air container is a rigid piece and is communicated with the electric inflating device, the air container and the electric inflating device are both arranged on the electronic scale, the protective cover is made of transparent materials, and the electric inflating device, the air container and the electronic scale are all arranged in the protective cover.

Compared with the prior art, the utility model has the advantages that:

the utility model comprises an electric air charging device, an air container, an electronic scale and a protective cover, wherein the electric air charging device is arranged on the electronic scale when in use, the electric air charging device and the electronic scale are arranged in the protective cover, the protective cover is closed after the electronic scale is zeroed, the electric air charging device is started to charge air to the air container through a remote controller, and the change of the numerical value of the electronic scale along with the continuous charging of air is observed, so that students can recognize that the air is of quality. The utility model uses the electric inflating device, has simple and convenient operation, quick and time-saving inflating process, and the volume of the air container can not change, thereby effectively avoiding the influence of air buoyancy on the test; the electronic scale and the transparent protective cover are adopted to facilitate the observation of the experimental process; the protection cover can avoid damage or injury of a tester caused by accidents.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following description will briefly introduce the drawings that are needed in the embodiments or related technical descriptions, and it is obvious that the drawings in the following description relate only to some embodiments of the present utility model and are not limiting to the present utility model.

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a schematic bottom view of the connection plate of the present utility model.

Fig. 3 is a schematic view of the structure of the air path of the present utility model.

Fig. 4 is a schematic circuit configuration of the present utility model.

Reference numerals in the drawings: 1. an electric inflator; 11. an inflator pump; 12. a battery; 13. a switch; 14. a controller; 141. a control main board; 142. a remote controller; 2. an air container; 21. a bottle body; 22. sealing cover; 221. an exhaust valve; 3. an electronic scale; 4. a protective cover; 41. a door; 5. a non-return valve; 6. a connector; 7. an air pressure gauge; 8. an air pressure safety valve; 9. a connecting plate; 91. support legs; 92. placing a cylinder; 10. and (5) an inflation tube.

Detailed Description

In order that the above-recited objects, features and advantages of the present utility model will be more clearly understood, a more particular and non-limiting detailed description of the utility model will be rendered by reference to the appended drawings and appended detailed description.

As shown in fig. 1 to 4, the air quality demonstration instrument of the present embodiment includes an electric inflator 1, an air container 2, an electronic scale 3, a protection cover 4 and a connection board 9, wherein the electric inflator 1 is connected with the air container 2 for inflating the air container 2, the electronic scale 3 is used for weighing the inflated weight of the device, the protection cover is arranged outside the electronic scale 3 and the air container 2 for protecting the test device, and the connection board 9 is used for connecting with the electric inflator 1.

The connecting plate 9 is a square plate body and is used for being connected with the electric inflator 1. The lower end of the connection plate 9 is provided with four supporting legs 91 so that the lower end of the connection plate 9 has a receiving space. The connection plate 9 is provided with a placement cylinder 92 for placing the air container 2. The electronic scale 3 is placed under the connecting plate 9, when in use, the electronic scale 3 is zeroed, and the numerical value displayed on the electronic scale 3 in the inflation process is the weight of the inflated air. The electric inflating device 1 and the air container 2 are placed on the electronic scale 3 as a whole to be measured, so that the air container 2 is prevented from being pulled by the inflating tube 10, the inflating quantity and the numerical value of the electronic scale 3 are changed linearly as much as possible, and the fact that the air has quality is intuitively and scientifically shown in front of students.

The electric inflator 1 includes an inflator 11, a battery 12, a switch 13, and a controller 14, the controller 14 includes a control main board 141 and a remote controller 142, and the remote controller 142 controls the control main board 141 by radio waves. The inflation port of the inflator 11 is connected with a check valve 5, and the check valve 5 prevents air from flowing back and ensures air tightness. The air outlet of the check valve 5 is connected with a four-way connector 6 with four connectors, and the check valve 5 is connected with one of the connectors; the other three connectors of the connector 6 are respectively connected with the air container 2, the barometer 7 and the air pressure safety valve 8, and an inflation tube 10 is arranged at the connector of the connector 6 connected with the air container 2. The barometer 7 is used for monitoring the air pressure change in the inflation process and is matched with the electronic scale 3 to finish the measurement of air quality. The air pressure safety valve 8 is connected with the control main board 141, the air pressure safety valve 8 adopts an adjustable air pressure safety valve 8 with the adjusting range of 0-0.75 MPa, the air pressure safety valve 8 is used for setting the maximum air pressure, the air pressure safety valve 8 sends a control signal to the control main board 141 when the air pressure is exceeded, and the control main board 141 receives the signal and then automatically cuts off the circuit to stop the air charging. The battery 12 is a 12V rechargeable battery pack, as shown in fig. 4, the battery 12 is connected in series with the switch 13, the air pressure safety valve 8 and the control main board 141, and then connected in parallel with the inflator 11, and the battery 12 is used for supplying power to the inflator 11 and the control main board 141. When the inflation device is used, the inflation can be started by opening the switch 13 and pressing the remote controller 142, and then the inflation is stopped by pressing the remote controller 142 once.

The air container 2 includes a bottle body 21 and a sealing cap 22. The bottle body 21 adopts a thick-wall pressure-resistant bottle, and the thick-wall pressure-resistant bottle of the embodiment can bear six times of standard air pressure at maximum, which is higher than the highest air pressure of the inflator 11 in the embodiment, so that the pressure-resistant bottle cannot be broken. The sealing cover 22 is provided with an air charging hole which is connected with the air charging pipe 10 on the connector 6. The sealing cover 22 is provided with an exhaust valve 221, and when the exhaust valve 221 is unscrewed, the compressed air in the air container 2 can be released

The electronic scale 3 is 1000g in measuring range and 0.01g in precision, and a display screen and a control button are arranged on the electronic scale 3. The high-precision electronic scale 3 can still have numerical value change when a small amount of air is filled, so that the test can more intuitively show that the measured numerical value changes along with the change of the air filling amount. The electronic scale 3 can be accurate to 0.01g, the measured value of the electronic scale 3 changes obviously along with the change of the air filling amount, and the remote control starting and stopping air charging device is simple to operate, and saves time and labor.

The protection cover 4 is made of transparent materials, so that the display of the electronic scale 3 and the indication of the barometer 7 can be conveniently observed, and the protection cover 4 is provided with a door 41 capable of being opened and closed, so that the operation is convenient. The protective cover 4 can prevent the test device from being damaged by artificial accidents during the test or injuring people caused by the accidental damage of the test device.

The experimental steps are as follows: setting the maximum air pressure by adjusting a knob on the air pressure safety valve 8, placing the electric inflating device 1 on the electronic scale 3, placing the electronic scale 3 into the protective cover 4, then screwing an air outlet valve 221 on the air container 2, connecting the air inflation tube 10 with an inflating hole on the sealing cover 22, placing the air container 2 into the placing cylinder 92 after the connection is completed, opening the switch 13, zeroing the electronic scale 3, and closing a door 41 of the protective cover 4; the remote controller 142 is used for remotely starting the inflator pump 11 to inflate, and the numerical value of the electronic scale 3 is also changed along with the change of the inflated air quantity, so that students can intuitively know that the air is of quality. To repeat the test, the air in the air container 2 is released by opening the air release valve 221, and then the test is performed again.

It should be noted that the foregoing description of the preferred embodiments is merely illustrative of the technical concept and features of the present utility model, and is not intended to limit the scope of the utility model, as long as the scope of the utility model is defined by the claims and their equivalents. All equivalent changes or modifications made in accordance with the spirit of the present utility model should be construed to be included in the scope of the present utility model.

Claims (9)

1. The utility model provides an air quality demonstration appearance, its characterized in that, including electric aerating device (1), air container (2), electronic scale (3) and safety cover (4), air container (2) are the rigidity piece, and communicate with electric aerating device (1), and electronic scale (3) are all arranged in to air container (2) and electric aerating device (1), and safety cover (4) are transparent material, and electric aerating device (1), air container (2) and electronic scale (3) are all located in safety cover (4).

2. The air quality demonstration instrument according to claim 1, wherein the electric inflating device (1) comprises an inflating pump (11), a controller (14), a battery (12) and a switch (13), the inflating pump (11) is communicated with the air container (2), the controller (14) is electrically connected with the inflating pump (11) and can control the starting and stopping of the inflating pump (11), the battery (12) is used for supplying power to the inflating pump (11) and the controller (14), and the switch (13) is used for controlling the on-off of a circuit.

3. The air quality demonstration instrument according to claim 2, wherein the controller (14) comprises a control main board (141) and a remote controller (142), the control main board (141) is electrically connected with the inflator (11), the air pressure safety valve (8) and the battery (12), and the remote controller (142) controls the control main board (141) through radio waves.

4. An air quality demonstration instrument according to claim 3 characterized in that a non-return valve (5) is provided between the inflator (11) and the air container (2).

5. The air quality demonstration instrument according to claim 4, wherein the check valve (5) is connected with the air container (2) through a connector (6), and a barometer (7) is connected to the connector (6).

6. The air quality demonstration instrument according to claim 5, wherein the connector (6) is connected with an air pressure safety valve (8), and the air pressure safety valve (8) is electrically connected with the controller (14).

7. The air quality demonstration instrument according to claim 6, further comprising a connecting plate (9), wherein a placing barrel (92) is arranged on the connecting plate (9), a supporting leg (91) is arranged at the lower end of the connecting plate (9), the battery (12), the control main board (141), the inflator pump (11), the check valve (5) and the air pressure safety valve (8) are fixedly connected to the lower end face of the connecting plate (9), the connecting head (6), the air pressure gauge (7) and the switch (13) are fixedly arranged on the upper end face of the connecting plate (9), and the electronic scale (3) is arranged below the connecting plate (9).

8. The air quality demonstration instrument according to any one of claims 1 to 7, wherein the air container (2) comprises a transparent glass bottle body (21) and a sealing cover (22) arranged at the top of the bottle body (21), the sealing cover (22) is connected with the electric inflating device (1) through an inflating tube (10), and an exhaust valve (221) is arranged on the sealing cover (22).

9. The air quality demonstration instrument according to claim 1, wherein an openable door (41) is provided on a side wall of the protective cover (4).