A three-dimensional displacement platform for negative ion generator performance evaluation

Abstract

The present invention belongs to the technical field of analytical chemistry instruments. Specifically, it provides a three-dimensional displacement platform for evaluating the performance of negative ion generators. The platform comprises a semi-enclosed chamber, an X-axis displacement module, a Z-axis displacement module, a Y-axis movable platform, and an air purge pipeline. The X-axis displacement module, the Z-axis displacement module, and the Y-axis movable platform can adjust the distance between the negative ion generator and the mass spectrometer inlet in the front-to-back, top-to-bottom, and left-to-right directions. The air purge pipeline faces the mass spectrometer inlet and can introduce gases of varying humidity, flow rate, temperature, and type. The semi-enclosed chamber facilitates disassembly and reduces external environmental interference. The present invention is applicable to the performance testing of negative ion generators of different specifications and can adjust a variety of test conditions, allowing for a deeper understanding of the factors influencing negative ion production, thus possessing great application value.

Description

Technical Field

[0001] The invention belongs to the technical field of analytical chemical instruments, in particular to a three-dimensional displacement platform for evaluating the performance of a negative ion generator. Background Art

[0002] A negative ion generator uses a high-voltage power supply to create a strong electric field around a brush or needle tip, ionizing air molecules. During the ionization process, neutral gas molecules lose electrons to form positive ions, releasing free electrons that then combine with other air molecules to form negative ions. These negative ions are then released into the air, where they can attach to tiny particles, causing them to settle and purify the air.

[0003] Factors that influence the amount of negative ions produced by a negative ion generator include the voltage and current of the high-voltage power supply, the design and material of the brushes or electrodes, air humidity, ambient temperature, and the cleanliness of the surrounding air. Higher voltage and better conductive materials can effectively increase negative ion production, while appropriate humidity and temperature help improve the diffusion and stability of negative ions.

[0004] As an analytical technique, mass spectrometry can accurately detect the quantity and concentration of negative ions produced and is an effective means to evaluate the performance of negative ion generators. Summary of the Invention

[0005] The present invention aims to provide a three-dimensional displacement platform for evaluating the performance of negative ion generators. The three-dimensional displacement platform is simple to operate, has multiple adjustable variables, and can be used to deeply analyze the ion production patterns of negative ion generators.

[0006] The object of the present invention is achieved through the following technical solutions:

[0007] The present invention includes a semi-enclosed chamber, an X-axis displacement module, a Z-axis displacement module, a Y-axis movable platform and an air blowing pipeline. The X-axis displacement module and the Z-axis displacement module are both located outside the semi-enclosed chamber. The fixed portion of the X-axis displacement module is installed on the semi-enclosed chamber, the fixed portion of the Z-axis displacement module is connected to the output portion of the X-axis displacement module, the output portion of the Z-axis displacement module extends into the semi-enclosed chamber and is connected to the fixed portion of the Y-axis movable platform. The output portion of the Y-axis movable platform is installed with a negative ion generator to be tested; the air blowing pipeline is installed on one surface of the semi-enclosed chamber, one end of the air blowing pipeline is connected to a gas source, and the other end extends into the interior of the semi-enclosed chamber; a mass spectrometer inlet is opened on the other surface of the semi-enclosed chamber opposite to the installation of the air blowing pipeline, and the front-to-back, top-to-bottom, and left-to-right distances between the negative ion generator to be tested and the mass spectrometer inlet are regulated by the X-axis displacement module, the Z-axis displacement module and the Y-axis movable platform.

[0008] Wherein: the fixed part of the Y-axis movable platform is equipped with a motor at one end along the Y-axis moving direction, and a rotating shaft is rotatably installed at the other end; the output shaft of the motor and the rotating shaft are respectively connected to pulleys, and the pulley on the motor output shaft is connected to the pulley on the rotating shaft through a conveyor belt; the output part of the Y-axis movable platform is a fixed plate, which is installed on the conveyor belt, and a fixing groove for fixing the negative ion generator to be tested is fixed on the fixed plate.

[0009] The fixed part of the Y-axis moving platform is a slide rail, and the fixed piece is slidably connected to the slide rail.

[0010] The distance between the air blowing pipeline and the negative ion generator to be tested can be adjusted.

[0011] The air blowing pipeline includes an inner sleeve and an outer sleeve that can move relative to each other. The outer sleeve is fixed on one surface of the semi-enclosed cavity. One end of the inner sleeve is connected to the air source, and the other end of the inner sleeve is inserted into the outer sleeve and extends into the interior of the semi-enclosed cavity. The distance between the inner sleeve and the negative ion generator to be tested can be adjusted by moving the inner sleeve.

[0012] The air blowing pipeline is installed at the center of one surface of the semi-enclosed cavity and is directly facing the mass spectrometer inlet.

[0013] The semi-enclosed cavity is a rectangular parallelepiped, including a front panel, an upper cover, a rear panel, a base and two side panels. The base is provided with a through hole for the output part of the Z-axis displacement module to extend into, and the fixed part of the X-axis displacement module is fixedly connected to the lower surface of the base.

[0014] The front panel and / or upper cover are made of transparent material for easy observation of the internal situation of the cavity, and the base and the two side panels are made of metal material for providing strength.

[0015] The fixed part of the X-axis displacement module is fixedly connected to the semi-enclosed cavity through an L-shaped aluminum plate, and the output part of the Z-axis displacement module is connected to the fixed part of the Y-axis moving platform through a T-shaped aluminum plate.

[0016] The advantages and positive effects of the present invention are:

[0017] The present invention's X-axis displacement module, Z-axis displacement module, and Y-axis motion platform can adjust the distance between the negative ion generator and the mass spectrometer inlet in front, back, top, and left, right, and sides. The air purge line, facing the mass spectrometer inlet, allows for the introduction of gases of varying humidity, flow rates, temperatures, and types. The semi-enclosed chamber facilitates disassembly and reduces external environmental interference. This invention is applicable to performance testing of negative ion generators of varying specifications and allows for a variety of test conditions to be varied, enabling a deeper understanding of the factors influencing negative ion production, thus demonstrating its significant application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Among them: 1 is the front panel, 2 is the motor, 3 is the base, 4 is the slide rail, 5 is the L-shaped aluminum plate, 6 is the X-axis displacement module, 7 is the Z-axis displacement module, 8 is the T-shaped aluminum plate, 9 is the Y-axis moving platform, 10 is the conveyor belt, 11 is the side panel, 12 is the rear panel, 13 is the upper cover, 14 is the fixing slot, 15 is the fixing plate, 16 is the air blowing pipeline, 17 is the rotating shaft, and 18 is the mass spectrometer inlet. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] like Figure 1 As shown, the present invention includes a semi-enclosed cavity, an X-axis displacement module 6, a Z-axis displacement module 7, a Y-axis movable platform 9 and an air blowing pipeline 16. The X-axis displacement module 6 and the Z-axis displacement module 7 are both located outside the semi-enclosed cavity. The fixed part of the X-axis displacement module 6 is installed on the semi-enclosed cavity. The fixed part of the Z-axis displacement module 7 is connected to the output part of the X-axis displacement module 6. The output part of the Z-axis displacement module 7 extends into the semi-enclosed cavity and is connected to the fixed part of the Y-axis movable platform 9. The output part of the Y-axis movable platform 9 is installed with a negative ion generator to be tested; the air blowing pipeline 16 is installed on one surface of the semi-enclosed cavity, one end of the air blowing pipeline 16 is connected to the gas source, and the other end extends into the interior of the semi-enclosed cavity. A mass spectrometer inlet 18 is opened on the other surface of the semi-enclosed cavity opposite to the installation of the air blowing pipeline 16. The front-back, top-bottom, and left-right distances between the negative ion generator to be tested and the mass spectrometer inlet 18 are regulated by the X-axis displacement module 6, the Z-axis displacement module 7 and the Y-axis movable platform 9.

[0022] The semi-enclosed cavity of this embodiment is a rectangular parallelepiped, including a front panel 1, an upper cover 13, a rear panel 12, a base 3, and two side panels 11. The base 3 is provided with a through hole for the output portion of the Z-axis displacement module 7 to extend into. The through hole can be a square hole, and the size of the through hole should leave space for the X-axis displacement module 6 to drive the Z-axis displacement module 7 to move along the X-axis. The fixed portion of the X-axis displacement module 6 is fixedly connected to the lower surface of the base 3 via an L-shaped aluminum plate 5. The output portion of the Z-axis displacement module 7 is connected to the fixed portion of the Y-axis moving platform 9 via a T-shaped aluminum plate 8. The vertical side of the T-shaped aluminum plate 8 passes through the through hole and is connected to the output portion of the Z-axis displacement module 7. The horizontal side of the T-shaped aluminum plate 8 is located in the semi-enclosed cavity and is fixed to the fixed portion of the Y-axis moving platform 9. The front panel 1 and / or the upper cover 13 are made of transparent materials such as PMMA (polymethyl methacrylate), PC (polycarbonate) or transparent ABS plastic to facilitate observation of the internal conditions of the cavity; the base 3 and the two side panels 11 are made of metal materials such as aluminum or stainless steel to provide the required strength.

[0023] In this embodiment, the air blowing line 16 is mounted centrally on the front panel 1 , and the mass spectrometer inlet 18 is located on the rear panel 12 . Air blowing line 16 faces the mass spectrometer inlet 18 , allowing for the introduction of gases of varying humidity, flow rates, temperatures, and types. The distance between air blowing line 16 and the negative ion generator under test is adjustable. Specifically, air blowing line 16 comprises an inner sleeve and an outer sleeve that are movable relative to each other. The outer sleeve is fixed to the front panel 1 , with one end of the inner sleeve connected to the gas source and the other end of the inner sleeve inserted through the outer sleeve and extending into the semi-enclosed cavity. The distance between the inner sleeve and the negative ion generator under test can be adjusted by moving the inner sleeve.

[0024] In this embodiment, the fixed portion of the Y-axis movable platform 9 can be a slide rail 4. A motor 2 is mounted on one end of the slide rail 4 along the Y-axis movement direction, and a rotating shaft 17 is rotatably mounted on the other end. Pulleys are respectively connected to the output shaft of the motor 2 and the rotating shaft 17. The pulley on the output shaft of the motor 2 is connected to the pulley on the rotating shaft 17 via a conveyor belt 10, and the surface of the conveyor belt 10 has teeth. The output portion of the Y-axis movable platform 9 is a fixed plate 15. The fixed plate 15 is mounted on the conveyor belt 10 and is slidably connected to the slide rail 4. A fixed groove 14 for fixing the negative ion generator to be tested is fixed to the fixed plate 15. Therefore, the fixed groove 14 will move with the conveyor belt 10, and the movement speed of the conveyor belt 10 can be controlled by adjusting the speed of the motor 2. The fixed groove 14 of this embodiment can fix a negative ion generator with a width of 10 to 40 mm.

[0025] The X-axis displacement module 6 and the Z-axis displacement module 7 of the present invention are both prior arts and will not be described in detail here.

[0026] Experimental example

[0027] The front panel 1 and the upper cover 13 of the semi-enclosed cavity are both made of PMMA, which facilitates observation of the internal situation of the cavity; the rear panel 12, the base 3 and the two side panels 11 are all made of aluminum, which can provide the required strength.

[0028] The negative ion generator to be tested is fixed on the fixing groove 14 by screws. The air blowing pipe 16 is fed with air of 50% RH, flow rate 3 m / s and temperature 25°C.

[0029] The X-axis displacement module 6 and the Z-axis displacement module 7 are fixed together, and then the other side of the X-axis displacement module 6 is fixed to the lower surface of the base 3 through an L-shaped aluminum plate 5; the Z-axis displacement module 7 is fixed to the Y-axis moving platform 9 through a T-shaped aluminum plate 8, thereby realizing the linkage between the platforms.

[0030] The fixing groove 14 fixes the negative ion generator with a width of 25 mm.

[0031] The air blowing pipeline 16 is fixed at the center of the front panel 1 , and the distance between the air blowing pipeline 16 and the negative ion generator is 10 mm.

[0032] The mass spectrometer used to connect the three-dimensional displacement platform is a positive-negative switching time-of-flight mass spectrometer, which can be purchased from the TRACE 8000 chemical ionization time-of-flight mass spectrometer of Juguan Technology (Hangzhou) Co., Ltd.

Claims

1. A three-dimensional displacement platform for negative ion generator performance evaluation, characterized by: The invention comprises a semi-enclosed cavity, an X-axis displacement module (6), a Z-axis displacement module (7), a Y-axis moving platform (9) and an air blowing pipeline (16), wherein the X-axis displacement module (6) and the Z-axis displacement module (7) are both located outside the semi-enclosed cavity, the fixed portion of the X-axis displacement module (6) is installed on the semi-enclosed cavity, the fixed portion of the Z-axis displacement module (7) is connected to the output portion of the X-axis displacement module (6), the output portion of the Z-axis displacement module (7) extends into the semi-enclosed cavity and is connected to the fixed portion of the Y-axis moving platform (9), and the Y-axis moving platform The negative ion generator to be tested is installed at the output portion of the platform (9); the air blowing pipeline (16) is installed on one surface of the semi-enclosed cavity, one end of the air blowing pipeline (16) is connected to the gas source, and the other end extends into the interior of the semi-enclosed cavity, and a mass spectrometer injection port (18) is provided on the other surface of the semi-enclosed cavity opposite to the installation of the air blowing pipeline (16), and the distance between the negative ion generator to be tested and the mass spectrometer injection port (18) is regulated in front and back, up and down, and left and right directions by the X-axis displacement module (6), the Z-axis displacement module (7) and the Y-axis moving platform (9).

2. The three-dimensional displacement platform for negative ion generator performance evaluation according to claim 1, characterized in that: A motor (2) is installed at one end of the fixed portion of the Y-axis moving platform (9) along the Y-axis moving direction, and a rotating shaft (17) is rotatably installed at the other end. The output shaft of the motor (2) and the rotating shaft (17) are respectively connected to pulleys, and the pulley on the output shaft of the motor (2) is connected to the pulley on the rotating shaft (17) through a conveyor belt (10). The output portion of the Y-axis moving platform (9) is a fixed plate (15), and the fixed plate (15) is installed on the conveyor belt (10). A fixing groove (14) for fixing the negative ion generator to be tested is fixed on the fixed plate (15).

3. The three-dimensional displacement platform for negative ion generator performance evaluation according to claim 2, characterized in that: The fixed part of the Y-axis moving platform (9) is a slide rail (4), and the fixed plate (15) is slidably connected to the slide rail (4).

4. The three-dimensional displacement platform for negative ion generator performance evaluation according to claim 1, characterized in that: The distance between the air blowing pipeline (16) and the negative ion generator to be tested can be adjusted.

5. The three-dimensional displacement platform for negative ion generator performance evaluation according to claim 4, characterized in that: The air blowing pipeline (16) comprises an inner sleeve and an outer sleeve that can move relative to each other, the outer sleeve being fixed on one surface of a semi-enclosed cavity, one end of the inner sleeve being connected to a gas source, and the other end of the inner sleeve being inserted through the outer sleeve and extending into the interior of the semi-enclosed cavity, and the distance between the inner sleeve and the negative ion generator to be tested can be adjusted by moving the inner sleeve.

6. The three-dimensional displacement platform for negative ion generator performance evaluation according to claim 1, characterized in that: The air blowing pipeline (16) is installed at the center of one surface of the semi-enclosed cavity and is directly opposite to the mass spectrometer injection port (18).

7. The three-dimensional displacement platform for negative ion generator performance evaluation according to claim 1, characterized in that: The semi-enclosed cavity is a rectangular parallelepiped, comprising a front panel (1), an upper cover (13), a rear panel (12), a base (3) and two side panels (11); a through hole for the output portion of the Z-axis displacement module (7) to extend into is provided on the base (3); and a fixed portion of the X-axis displacement module (6) is fixedly connected to the lower surface of the base (3).

8. The three-dimensional displacement platform for negative ion generator performance evaluation according to claim 7, characterized in that: The front panel (1) and / or the upper cover (13) are made of a transparent material for facilitating observation of the internal conditions of the cavity, and the base (3) and the two side panels (11) are made of a metal material for providing strength.

9. The three-dimensional displacement platform for negative ion generator performance evaluation according to claim 1, characterized in that: The fixed portion of the X-axis displacement module (6) is fixedly connected to the semi-enclosed cavity via an L-shaped aluminum plate (5), and the output portion of the Z-axis displacement module (7) is connected to the fixed portion of the Y-axis moving platform (9) via a T-shaped aluminum plate (8).

Images