Airborne particle counter convenient to disassemble and clean

Abstract

The utility model relates to an airborne particle counter convenient to disassemble and clean in the technical field of particle counting. The airborne particle counter comprises a fixing assembly, a measuring chamber assembly and a sampling hopper, the measuring chamber assembly is arranged inside the fixing assembly, and the sampling hopper is arranged above the measuring chamber assembly and is at least partially embedded in the measuring chamber; the measuring chamber assembly comprises a measuring chamber; the measuring chamber comprises a leading-in section, a measuring section and a leading-out section; the guide-out section is connected with a discharge channel; the discharge channel is connected with a fan; the measuring chamber assembly further comprises a collimating lens and a convergent lens; the collimating lens and the convergent lens are installed at the two ends of the inner side of the measuring section respectively. A light source and a photoelectric detector are arranged in the fixing assembly and are arranged on the left side of the collimating lens and the right side of the convergent lens respectively. The sampling hopper and the measuring chamber are independent units, easily-damaged parts are convenient to disassemble, clean or replace due to the detachable design, the structure is simple, and operation is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of particle counting, especially to a gas-borne particle counter convenient to dismount and clean. BACKGROUND

[0002] The conventional optical method (including light scattering method and light blocking method) particle counter for measuring the particle size and number of particulate matters in gas is integrated, that is, the measuring system, fan, power supply and the like are placed in one shell, resulting in a large volume and being difficult to place in a narrow space. In order to measure the content of particulate matters in a narrow space, a duct is led out, the free end of the duct is provided with a sampling bucket, and the sampling bucket is extended into the small space during measurement. The problems of this scheme are that a part of the particulate matters may deposit or adhere to the inner wall of the sampling bucket, duct and measuring assembly during the movement of the particulate matters with the fluid, thereby causing part of the measured particulate matters to be missed, and the particulate matters adhering to the inner wall of the channel may fall off and be regarded as the particulate matters of this measurement, thereby causing false counting. Both of the above situations will cause errors in measurement. In daily maintenance, the sampling head is close to the open space and is relatively easy to clean, but the inner wall of the sample delivery pipe and the photoelectric assembly is not easy to clean. The latest design combines the measuring assembly and the sampling bucket to form a relatively independent measuring unit, and the remaining part is wrapped by a shell to form a driving unit of the instrument. The measuring unit and the driving unit are connected by a duct and a communication line, so that the duct is arranged behind the measuring unit, and even if the inner wall of the duct adheres to the particulate matters, it has no effect on the measurement result.

[0003] Although the new technology eliminates the influence of the pollution inside the duct on the measurement of the particulate matters, the inner wall of the flow channel of the measuring unit is inevitably polluted. The measuring unit is composed of the sampling bucket, measuring assembly, fixing assembly and the like, and the measuring assembly is placed in the fixing assembly below the sampling bucket, so that it is very troublesome to clean if it is polluted by the particulate matters. To solve this problem, the application provides an optical method particle counter convenient to dismount and clean. UTILITY MODEL CONTENT

[0004] To solve the above technical problem, the application provides a gas-borne particle counter convenient to dismount and clean, and the technical scheme is as follows:

[0005] The gas-borne particle counter convenient to dismount and clean comprises a fixing assembly, a measuring chamber assembly and a sampling bucket.

[0006] The measuring chamber assembly is arranged in the fixing assembly, and the sampling bucket is arranged above the measuring chamber assembly and at least partially embedded in the fixing assembly.

[0007] The measuring chamber assembly comprises a measuring chamber.

[0008] The measuring chamber comprises an import section, a measuring section and an export section;

[0009] The export section is connected with an exhaust channel;

[0010] The exhaust channel is connected with a fan;

[0011] The measuring chamber assembly further comprises a collimating lens and a converging lens;

[0012] The collimating lens and the converging lens are respectively installed at the inner two ends of the measuring section.

[0013] The fixing assembly is provided with a photoelectric detector;

[0014] The fixing assembly is provided with a light source.

[0015] Preferably, the measuring chamber assembly is detachably connected with the fixing assembly.

[0016] Preferably, the measuring chamber assembly is fixedly connected with the fixing assembly through two measuring chamber fixing screws.

[0017] Preferably, the sampling hopper is detachably connected with the fixing assembly.

[0018] Preferably, the sampling hopper is fixedly connected with the fixing assembly through a sampling hopper fixing screw.

[0019] The advantages of the present application are as follows:

[0020] When the measuring chamber needs to be cleaned or replaced, the sampling hopper fixing screw is loosened first, and then the sampling hopper is removed; then the two measuring chamber fixing screws are loosened, and the measuring chamber assembly can be pulled out from bottom to top. After disassembly, the sampling hopper can be completely cleaned inside and outside, and the interior of the measuring chamber can also be cleaned. If it is found that the surface of the two lenses of the measuring chamber assembly is scratched by particles, a new measuring chamber assembly can also be replaced. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings described below are only one embodiment of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0022] Wherein the same parts are indicated by the same reference numerals. It should be noted that the words "front", "back", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings, and the words "bottom surface" and "top surface", "inner" and "outer" refer to the directions towards or away from the geometric center of a particular part.

[0023] Figure 1 Figure 1 is a schematic diagram of the structure of an embodiment of an airborne particle counter which is easy to disassemble and clean; wherein, Figure 1 (a) in Figure 1 is an operating state, Figure 1 (b) in Figure 1 is a disassembled state.

[0024] In the above figures, the respective figure reference numerals represent:

[0025] 1, flow line;

[0026] 2, sampling hopper;

[0027] 3, fixed assembly;

[0028] 4, measurement chamber assembly;

[0029] 5, measurement chamber fixing screw;

[0030] 6, collimator;

[0031] 7, light source;

[0032] 8, discharge channel;

[0033] 9, photodetector;

[0034] 10, converging lens

[0035] 11, lead-out section;

[0036] 12, measurement section;

[0037] 13, lead-in section;

[0038] 14, sampling hopper fixing screw. DETAILED DESCRIPTION

[0039] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0040] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the specific embodiments are only for the purpose of describing the specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of the drawings are intended to cover non-exclusive inclusion.

[0041] In the description of the specific embodiments of the utility model, the technical terms "first", "second" and the like are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the utility model, the meaning of "a plurality of" is more than two, unless otherwise explicitly specified.

[0042] In the utility model, the "embodiment" means that the specific features, structures or characteristics described in combination with the embodiment can be included in at least one embodiment of the utility model. The phrase appears at various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is not mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in the utility model can be combined with other embodiments.

[0043] In the description of the embodiments of the utility model, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can mean that there are three cases of A alone, A and B together, and B alone. In addition, the character " / " in the utility model generally represents an "or" relationship between the front and rear associated objects.

[0044] The existing particle counter excludes the influence of the pollution inside the pipe on the particle measurement, but the inner wall of the flow channel of the measurement unit is inevitably polluted. The measurement unit is composed of a sampling bucket, a measurement assembly, a fixing assembly and the like, and the measurement assembly is placed in the fixing assembly below the sampling bucket, which is very troublesome to clean if it is polluted by particles. To solve this problem, the application provides an optical particle counter which is convenient to disassemble and clean.

[0045] The embodiments of the utility model will be described more specifically through the following examples. It should be noted that the embodiments of the utility model are not limited to these examples only.

[0046] In a specific embodiment, as shown in Figure 1 A gas-borne particle counter convenient to disassemble and clean, comprising a fixing assembly, a measurement chamber assembly and a sampling bucket; the measurement chamber assembly is arranged inside the fixing assembly, and the sampling bucket is arranged above the measurement chamber assembly and at least partially embedded in the fixing assembly; the measurement chamber assembly comprises a measurement chamber; the measurement chamber comprises an inlet section, a measurement section and an outlet section; the outlet section is connected to an exhaust channel; the exhaust channel is connected to a fan; the measurement chamber assembly further comprises a collimating lens and a converging lens; the collimating lens and the converging lens are respectively installed at the left and right ends of the inner side of the measurement section.

[0047] The embodiment mainly consists of a fixed component 3, a measuring chamber component 4 and a sampling bucket 2. The measuring chamber component 4 is installed inside the fixed component 3 and is tightly combined with the fixed component 3 by two measuring chamber fixing screws 5. The sampling bucket 2 is installed above the measuring chamber component 4 and is tightly contacted with the measuring chamber and is half-buried in the fixed component 3. The sampling bucket 2 is fastened with the fixed component 3 by a sampling bucket fixing screw 14 to prevent loosening. In the working state, the fan is started and the connected exhaust channel 8 exhausts air outward to form a negative pressure area. The gas (carrying particulate matter) in the measured space around the sampling bucket 2 is sucked into the sampling bucket 2 (see flow line 1) and passes through the inlet section 13, the measuring section 12 and the outlet section 11 of the measuring chamber in sequence and then is discharged from the measuring unit of the instrument through the exhaust channel 8. When the particulate matter carried by the fluid flows through the measuring section 12, the particle size is measured and counted. The fixed component 3 contains a light source 7, a photoelectric detector 9, an exhaust channel 8 and a shell 3. The measuring chamber component 4 contains a collimating lens 6 and a converging lens 10 which are respectively installed at the left and right ends of the measuring section 12 of the measuring chamber. When the measuring chamber needs to be cleaned or replaced, the sampling bucket fixing screw 14 is loosened first, the sampling bucket is removed, then the two measuring chamber fixing screws 5 are loosened, and the measuring chamber component 4 can be pulled out from bottom to top. After disassembly, the inside and outside of the sampling bucket can be thoroughly cleaned, and the inside of the measuring chamber can also be cleaned. If it is found that the surfaces of the two lenses of the measuring chamber component are scratched by particles, a new measuring chamber component can also be replaced. Reference is made to the attached drawings. Figure 1 Fig. (a) shows the working state of the measuring unit components combined together, and Fig. (b) shows the state of the measuring unit components disassembled.

[0048] It should be noted that the above only describes the preferred embodiment of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An airborne particle counter that facilitates disassembly for cleaning, characterized by, The fixed assembly, the measuring chamber assembly and the sampling bucket are included. The measuring chamber assembly is arranged inside the fixed assembly, and the sampling bucket is arranged above the measuring chamber assembly and at least partially embedded in the fixed assembly. The measuring chamber assembly includes a measuring chamber. The measuring chamber includes an inlet section, a measuring section and an outlet section. The outlet section is connected with an exhaust channel. The exhaust channel is connected with a fan. The measuring chamber assembly further includes a collimating lens and a converging lens. The collimating lens and the converging lens are respectively arranged at the two ends of the inner side of the measuring section. A photoelectric detector is arranged in the fixed assembly. A light source is arranged in the fixed assembly.

2. The airborne particle counter of claim 1, wherein, The measuring chamber assembly and the fixed assembly are detachably connected.

3. The airborne particle counter of easy disassembly and cleaning according to claim 2, characterized in that, The measuring chamber assembly and the fixed assembly are fixedly connected by two measuring chamber fixing screws.

4. The airborne particle counter of claim 1, wherein, The sampling bucket and the fixed assembly are detachably connected.

5. The airborne particle counter of claim 4, wherein, The sampling bucket and the fixed assembly are fixedly connected by a sampling bucket fixing screw.

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