Split type optical particle counter

Abstract

The utility model relates to a split type optical particle counter in the technical field of optical particle counting. The split type optical particle counter comprises a measuring unit and a driving unit, the measuring unit is separated from the driving unit; the driving unit comprises a first shell, a power supply, a control circuit board, a fan and a display screen; the measuring unit comprises a second shell, a sampling head, a photoelectric assembly and a signal processing circuit board; the driving unit and the measuring unit are connected through a sample conveying pipe and a communication line. According to the utility model, the measuring unit can be made to be small enough, so that the measuring unit can be conveniently placed in a narrow measured space; the particulate matters sucked by the sampling head directly enter a measuring area, so that the problem that the current particulate matters are missed due to pipeline deposition or adhesion does not exist; particles adhered to the inner wall of the pipeline in the past measurement cannot enter a measurement area even if falling off in the measurement process, so that the measurement is not influenced; the measuring assembly is close to the open space and is easy to clean.

Description

Technical Field

[0001] This utility model relates to the field of optical particle counting technology, and in particular to a split-type optical particle counter. Background Technology

[0002] Optical particle counters, based on their counting principles, can be divided into two categories: optical obscuration (extinction) method and light scattering method. The former calculates the particle size based on the attenuation of transmitted light as the particle passes through the measurement area, while the latter calculates the particle size based on the intensity of scattered light generated by the particle as it passes through the measurement area. In terms of application scenarios, they are divided into two media environments: gaseous and liquid. These refer to particulate matter in the air and particulate matter in liquids. The former are called airborne particles, and the latter are called liquidborne particles. In some applications, the observed location (e.g., inside some machinery) is in a confined space. Current optical particle counters are all integrated; see appendix. Figure 1 The instrument's housing 1 houses a photoelectric unit 4 (with the measurement area inside), a fan 3, and a circuit board 2. A display screen 7 is mounted on the inclined surface of the housing, resulting in a relatively large size (approximately 300mm in all dimensions), making it unsuitable for confined spaces. To address this issue, the current solution involves extending a sample delivery tube 5 from the instrument's main unit, with a sampling head 6 attached to its tip. Negative pressure generated by the internal fan 3 collects gas or liquid near the sampling head 6 into the sampling head, which is then delivered to the photoelectric component 4 via the sample delivery tube 5. When the gas or liquid passing through the photoelectric component 4 contains particulate matter, it can be detected by the component. However, this solution has a problem: as the particulate matter moves with the fluid, some may deposit or adhere to the inner walls of the sampling head 6, the sample delivery tube 5, or the photoelectric component 4's internal flow channels (collectively referred to as "channel inner walls"). This deposition and adhesion can lead to missed detections of currently measured particles. Furthermore, particles previously adhered to the channel inner walls may fall off during the measurement process and be counted as part of the current measurement, resulting in false counts. Both of these scenarios can introduce measurement errors. During routine maintenance, the sampling head is located near an open space, making it relatively easy to clean; however, the inner walls of the sample delivery tube and photoelectric components are not easy to clean.

[0003] To address the aforementioned problems, this invention proposes a split-type optical particle counter. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model proposes a split-type optical particle counter.

[0005] The technical solution of this utility model is implemented as follows:

[0006] A split-type optical particle counter includes a measurement unit and a driving unit;

[0007] The measuring unit and the driving unit are separated;

[0008] The drive unit includes a first housing, a power supply and control circuit board, a fan, and a display screen;

[0009] The measurement unit includes a second housing, a sampling head, an optoelectronic component, and a signal processing circuit board;

[0010] The driving unit and the measuring unit are connected via a sample delivery tube and a communication line;

[0011] The power supply and control circuit board is located inside the first housing and connected to the first end of the communication line; the fan is located inside the first housing and connected to the first end of the sample delivery tube; the display screen is embedded in the outer surface of the first housing and connected to the power supply and control circuit board.

[0012] The sampling head is connected to the second end of the sample delivery tube. The sampling head is at least partially disposed inside the second housing. The photoelectric component is disposed at the lower end of the sampling head. The signal processing circuit board is disposed inside the second housing and connected to the second end of the communication line.

[0013] Preferably, the sampling head is funnel-shaped.

[0014] Preferably, the display screen is a touch display screen.

[0015] Preferably, the sampling head is detachably connected to the second end of the sample delivery tube.

[0016] The advantages of this utility model are as follows:

[0017] The measuring unit in this invention can be made small enough to be placed in a small measuring space; the particles sucked in by the sampling head directly enter the measuring area, and there is no problem of missed particle counting caused by pipe deposition or adhesion;

[0018] In previous measurements, even if particles adhering to the inner wall of the pipe fell off during the measurement process, they would not enter the measurement area and would not affect the measurement.

[0019] The measuring components are close to the open space, making them easy to clean.

[0020] Compared with traditional technologies, the technical solution of this utility model reduces measurement errors and is easier to maintain in daily life. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one embodiment of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific part, respectively.

[0023] Figure 1 This is a schematic diagram of a traditional optical particle counter;

[0024] Figure 2 This is a structural schematic diagram of an embodiment of the present utility model.

[0025] In the above figures, the figure numbers indicate the following:

[0026] 1. First shell;

[0027] 2. Circuit board;

[0028] 3. Fan;

[0029] 4. Optoelectronic components;

[0030] 5. Sample delivery tube;

[0031] 6. Sampling head;

[0032] 7. Display screen;

[0033] 8. Power supply and control circuit board;

[0034] 9. Second shell;

[0035] 10. Signal processing circuit board;

[0036] 11. Communication line. Detailed Implementation

[0037] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0038] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used in the detailed description is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms “comprising” and “having” and any variations thereof in the specification, claims and foregoing description of the invention are intended to cover non-exclusive inclusion.

[0039] In the description of the specific embodiments of this utility model, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this utility model, "multiple" means two or more, unless otherwise explicitly defined.

[0040] In this invention, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this invention can be combined with other embodiments.

[0041] In the description of this utility model embodiment, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this utility model, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0042] The embodiments of the present invention will be described in more detail below through examples. It should be noted that the embodiments of the present invention are not limited to these examples.

[0043] In one specific embodiment, such as Figure 2 As shown, a split-type optical particle counter includes a measurement unit and a driving unit.

[0044] The measurement unit and the drive unit are separated.

[0045] The drive unit includes a first housing 1, a power supply and control circuit board 8, a fan 3, and a display screen 7.

[0046] The measurement unit includes a second housing 9, a sampling head 6, an optoelectronic component 4, and a signal processing circuit board 10.

[0047] The drive unit and the measurement unit are connected via the sample delivery tube 5 and the communication line 11.

[0048] The power supply and control circuit board 8 is located inside the first housing and connected to the first end of the communication line 11. The fan 3 is located inside the first housing and connected to the first end of the sample delivery tube 5. The display screen 7 is embedded in the outer surface of the first housing and connected to the power supply and control circuit board 8.

[0049] The sampling head 6 is connected to the second end of the sample delivery tube 5. The sampling head 6 is at least partially disposed inside the second housing 9. The photoelectric component 4 is disposed at the lower end of the sampling head 6. The signal processing circuit board 10 is disposed inside the second housing 9 and connected to the second end of the communication line 11.

[0050] This embodiment divides the instrument into two parts: a drive unit and a measurement unit. The drive unit mainly includes larger components such as a housing 1, a power supply and control circuit board 8, a fan 3, and a display screen 7; the measurement unit includes components such as a housing 9, a sampling head 6, a photoelectric component 4, and a signal processing circuit board 10. The power supply and control circuit board 8 and the signal processing circuit board 10 are derived from existing technologies such as... Figure 1 The circuit board 2 shown is obtained by disassembly. The signal processing circuit board 10 only contains electronic components and corresponding circuits that must be close to the photoelectric component 4. The measurement unit and the drive unit are connected by the sample delivery tube 5 and the communication line 11. During measurement, the fan 3 is turned on, and negative pressure is transmitted to the sampling head 6 through the sample delivery tube 5. The fluid around the sampling head 6, along with the particulate matter, is sucked into the sampling head 6 and then flows through the measurement area in the photoelectric component 4. With the assistance of the signal processing circuit board 10, the photoelectric component 4 obtains information on the size and number of particulate matter. This information is transmitted to the power supply and control circuit board 8 through the communication line 11. The power supply and control circuit board 8 calculates the size and number of particulate matter and the fluid flow rate measured within a certain period and finally displays a measurement report on the display screen 7.

[0051] This allows the measuring unit to be made small enough to be placed in a confined space.

[0052] In some implementations, the sampling head 6 is funnel-shaped.

[0053] The funnel-shaped structure makes it easier to draw in gas around the sampling port.

[0054] In some implementations, the display screen 7 is a touch display screen 7.

[0055] In addition to displaying information, the touch screen 7 also allows staff to perform control operations.

[0056] In some implementations, the sampling head 6 is detachably connected to the second end of the sample delivery tube 5.

[0057] The detachable design makes it easy to clean and replace the sampling head 6. It can be adapted to different sizes of sampling heads 6 in different environments, making it suitable for more working conditions.

[0058] In some embodiments, the first housing and the second housing 9 are made of metal.

[0059] It should be noted that 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, improvements, etc., 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 split optical particle counter, comprising a measuring unit and a driving unit; characterized in that The measuring unit and the driving unit are separated; The driving unit comprises a first shell, a power supply and control circuit board, a fan and a display screen; The measuring unit comprises a second shell, a sampling head, a photoelectric assembly and a signal processing circuit board; The driving unit and the measuring unit are connected by a sample pipe and a communication line; The power supply and control circuit board are arranged in the interior of the first shell and connected to the first end of the communication line, the fan is arranged in the interior of the first shell and connected to the first end of the sample pipe, and the display screen is embedded on the outer surface of the first shell and connected to the power supply and control circuit board; The sampling head is connected to the second end of the sample pipe, the sampling head is at least partially arranged in the second shell, the photoelectric assembly is arranged at the lower end of the sampling head, and the signal processing circuit board is arranged in the interior of the second shell and connected to the second end of the communication line.

2. The split optical particle counter of claim 1, wherein, The sampling head is funnel-shaped.

3. The split optical particle counter of claim 1, wherein, The display screen is a touch display screen.

4. The split optical particle counter of claim 1, wherein, The sampling head is detachably connected to the second end of the sample pipe.

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