Dust particle counter

Abstract

The utility model discloses a dust particle counter which comprises a counting sensor, a power component, a first valve, a second valve, a third valve, a first filter and a second filter, the counting sensor comprises an air inlet nozzle and an air outlet nozzle; the power part comprises an air inlet and an air outlet; the third valve comprises a first passage and a second passage which can be communicated with the air outlet; the air outlet nozzle, the first valve, the air inlet, the air outlet, a first passage of the third valve and the first filter are sequentially communicated; the second valve is respectively communicated with the atmosphere and the air inlet; the second filter is respectively communicated with the second passage of the third valve and the air outlet nozzle; the dust particle counter disclosed by the utility model can solve the problems of pollution, blockage and dust accumulation of a duckbilled air inlet nozzle of a current sensor under the conditions of not influencing the sensor, a flow meter and environmental pollution, ensures that the flow of an instrument is stable and accurate, improves the airflow trafficability of a pipeline and the sensor, and improves the working efficiency. And the operation quality of the dust particle counter is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to environmental monitoring technical field especially for preventing dust particle in high -level purification environment from blocking the self -cleaning purging system of air sampling, concretely relates to a novel dust particle counter. BACKGROUND

[0002] Dust particle counter is the instrument for detecting dust concentration and size in clean workshop or clean room, thereby providing the basis for the identification of gas cleanliness level. The medical clean room, semiconductor workshop, different clean environment have higher requirements for detection precision and particle size, and there are more measurement points. Especially, the large particle dust, cotton and other sundries in the environment can be sucked into the sensor through the dust particle counter, causing blockage and dust accumulation, thereby affecting the measurement precision. In particular, the sensor air path design usually uses a flat rectangular duckbill-shaped air inlet nozzle at the front end as a common structure for air flow collection. The purpose of this structure is to prevent turbulence and backflow. However, under the influence of the above environment during long-term use, blockage and dust accumulation will inevitably occur at the flat duckbill, making it difficult for air flow to pass through and causing inaccurate flow readings. This leads to increased resistance of the air pump or fan until it is damaged. Dust and dirt will accumulate in the sensor and pipeline, ultimately affecting the counting efficiency, requiring replacement and repair of parts in the factory, and increasing maintenance costs. SUMMARY

[0003] The utility model aims at overcoming one or more deficiencies in the prior art, providing an improved dust particle counter that can solve the problems of sensor duckbill-shaped air inlet nozzle pollution, blockage and dust accumulation in current dust particle counters, and can freely switch between counting detection state and cleaning and purging state.

[0004] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of:

[0005] A dust particle counter, comprising a counting sensor, at least a power component for sucking air flow, a first valve, a second valve, a third valve, a first filter and a second filter;

[0006] The counting sensor comprises an air inlet and an air outlet;

[0007] The power component comprises an air inlet and an air outlet;

[0008] The third valve comprises a first passage and a second passage, and the first passage and the second passage can communicate with the air outlet;

[0009] The air outlet, the first valve, the air inlet, the air outlet, the first passage of the third valve and the first filter are sequentially communicated;

[0010] The second valve is communicated with the atmosphere and the air inlet respectively, and the second filter is communicated with the second passage of the third valve and the air outlet respectively.

[0011] According to the utility model, the dust particle counter comprises a counting detection working state and a backwashing purging state,

[0012] When the dust particle counter is in the counting detection working state, the first valve is in an open state, the second valve is in a closed state, the first passage of the third valve is in an open state and the second passage is in a closed state,

[0013] When the dust particle counter is in the backwashing purging state, the first valve is in a closed state, the second valve is in an open state, the first passage of the third valve is in a closed state and the second passage is in an open state.

[0014] In some embodiments of the utility model, the first valve, the second valve and the third valve are all electromagnetic valves.

[0015] In some embodiments of the utility model, the first valve is a one-way normally open electromagnetic valve, the second valve is a one-way normally closed electromagnetic valve, and the third valve is a two-position five-way electromagnetic valve.

[0016] In some embodiments of the utility model, the dust particle counter further comprises a control system, and the control system is communicatively connected with the first valve, the second valve and the third valve respectively.

[0017] In some embodiments of the utility model, the power component is a fan or an air pump.

[0018] In some embodiments of the utility model, the dust particle counter further comprises a flow meter, and the flow meter is communicated with the first filter.

[0019] In some embodiments of the utility model, the dust particle counter further comprises a plurality of anti-static rubber pipes, and each component is communicated through the anti-static rubber pipe.

[0020] In some embodiments of the utility model, the dust particle counter further comprises a plurality of three-way valves, the air outlet is communicated with the air inlet end of the first valve and the air outlet end of the second filter through a three-way valve respectively, and the air outlet end of the first valve is communicated with the air outlet end of the second valve and the air inlet through a three-way valve respectively.

[0021] In some embodiments of the utility model, the counting sensor, the first valve and the power component are sequentially arranged along a first track.

[0022] The third valve and the first filter are arranged along a second track in sequence, respectively.

[0023] The second valve and the second filter are arranged along a third track in sequence, respectively.

[0024] The third track is located between the first track and the second track.

[0025] Further, the first track, the second track and the third track are arranged in parallel.

[0026] Compared with the prior art, the utility model has the following advantages due to the above technical scheme:

[0027] The utility model discloses a dust particle counter, which is characterized by the following: a first valve, a second valve, a third valve, a first filter, a second filter and a third filter are arranged in sequence along a first track, a second track and a third track. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without the creative labor.

[0029] Fig. 1 It is a structure schematic view of dust particle counter in the embodiment of the utility model;

[0030] Fig. 2 It is a structure schematic view of dust particle counter in the embodiment of the utility model;

[0031] Fig. 3 It is a structure schematic view of dust particle counter in the embodiment of the utility model;

[0032] In the attached diagram, the following are the reference numerals: 1. Counting sensor; 11. Air inlet; 12. Air outlet; 2. Power unit; 21. Air inlet; 22. Air outlet; 3. First valve; 4. Second valve; 5. Third valve; 6. First filter; 7. Second filter; 8. Flow meter; 9. Three-way valve. Detailed Implementation

[0033] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments. Many specific details are set forth in the following description to provide a full understanding of the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present utility model. Therefore, the present utility model is not limited to the specific embodiments disclosed below.

[0034] In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0036] like Figs. 1 to 3 As shown, this example provides a dust particle counter, which includes a counting sensor 1, a power component 2 for at least drawing airflow, a first valve 3, a second valve 4, a third valve 5, a first filter 6, and a second filter 7.

[0037] The counting sensor 1 includes an air inlet 11 and an air outlet 12. The power unit 2 includes an air inlet and an air outlet. The third valve 5 includes a first passage and a second passage, both of which can be connected to the air outlet of the power unit 2. The air outlet 12, the first valve 3, the air inlet of the power unit 2, the air outlet of the power unit 2, the first passage of the third valve 5, and the first filter 6 are connected in sequence. The second valve 4 is connected to the atmosphere and the air inlet of the power unit 2, respectively. The second filter 7 is connected to the second passage of the third valve 5 and the air outlet 12, respectively.

[0038] In this example, valve 3, valve 4, and valve 5 are all solenoid valves. Furthermore, valve 3 is a normally open one-way solenoid valve, valve 4 is a normally closed one-way solenoid valve, and valve 5 is a two-position five-way solenoid valve.

[0039] The power component 2 is a fan or air pump. The dust particle counter also includes a flow meter 8 and a control system. The flow meter 8 is connected to the first filter 6. The control system is communicatively connected to the first valve 3, the second valve 4, the third valve 5, the flow meter 6, and the fan or air pump.

[0040] In the example, the dust particle counter further comprises a plurality of anti-static rubber tubes, a plurality of three-way valves 9, each component is connected through an anti-static rubber tube, the air outlet 12 is connected with the air inlet of the first valve 3 and the air outlet of the second filter 7 through a three-way valve 9, and the air outlet of the first valve 3 is connected with the air outlet of the second valve 4 and the air inlet of the power component 2 through a three-way valve 9. Further, in the example, the dust particle counter further comprises a plurality of quick connectors, which are used to connect and communicate between some components, and can be connected faster when connected, have excellent air tightness, are convenient and fast, and have good effects; meanwhile, the components can be easily disassembled and replaced.

[0041] In the example, the counting sensor 1, the first valve 3 and the power component 2 are sequentially arranged along a first track; the third valve 5 and the first filter 6 are sequentially arranged along a second track; the second valve 4 and the second filter 7 are sequentially arranged along a third track; and the third track is located between the first track and the second track. Further, the first track, the second track and the third track are arranged in parallel. The above arrangement is beneficial to compact structure layout and reduces the volume and space ratio.

[0042] The dust particle counter comprises a counting detection working state and a backwashing blowing state; when the dust particle counter is in the counting detection working state, the first valve 3 is in an open state, the second valve 4 is in a closed state, and the first passage of the third valve 5 is in an open state and the second passage is in a closed state; when the dust particle counter is in the backwashing blowing state, the first valve 3 is in a closed state, the second valve 4 is in an open state, and the first passage of the third valve 5 is in a closed state and the second passage is in an open state.

[0043] Further, in the normal counting detection working state, the air flow enters from the duckbill-shaped air inlet 11, is collected by the counting sensor 1 through light scattering method, the air inlet of the third valve 5, i.e. a two-position five-way electromagnetic valve, is connected with the power component 2 such as a fan, the air outlet, i.e. the first passage, is connected with the first filter 6, at this time, the pipeline connected with the second filter 7 of the other air outlet, i.e. the second passage, is in a normally closed state, and the second valve 4, i.e. a one-way normally closed electromagnetic valve, is also in a non-working state, the detected gas flows through the air outlet 12, the three-way valve 9, the first valve 3, i.e. a one-way normally open electromagnetic valve, the air inlet of the power component 2, the air outlet of the power component 2, under the suction of the power component 2 such as a fan, the gas flows through the third valve 5, i.e. a two-position five-way electromagnetic valve, passes through the first filter 6, and finally enters the detection link of the flow meter 8, and after the detection of the flow is completed, the gas is discharged, wherein the first filter 6 filters the oil particles, impurities and pollution particles in the electromagnetic valve and the environment gas before the flow detection, so as to prevent the pollution of the flow meter 8 and the detection environment.

[0044] In the backflushing and purging state, the valve core of the first valve 3, i.e., the normally open electromagnetic valve, enters the closed state after being powered on, the valve core of the second valve 4, i.e., the normally closed electromagnetic valve, enters the open state after being powered on, and the valve core of the third valve 5, i.e., the two-position five-way electromagnetic valve, connects the second filter 7 in the gas outlet position after being powered on. Therefore, the gas path of backflushing and purging is as follows: the power component 2, e.g., the fan, in the normal operation state, draws air, the air inlet of the second valve 4, i.e., the normally closed electromagnetic valve, draws air, the air passes through the three-way valve 9, the air inlet of the fan, the fan, the air outlet of the fan, enters the other air outlet of the third valve 5, i.e., the two-position five-way electromagnetic valve, the valve core of which is powered on, the air flows through the second filter 7 and the air outlet 12, returns to the counting sensor 1, and performs the backflushing and purging action on the duck-billed air inlet 11 which is blocked or accumulated with dust, wherein the purpose of passing through the second filter 7 is to filter the gas in the environment and the oil particles and impurities in the two-position five-way electromagnetic valve, and the counting sensor 1 is not secondarily polluted. The number and time of backflushing can be programmed according to the pollution of the actual environment to realize automatic cleaning in different sampling periods and different conditions.

[0045] In summary, the dust particle counter of the utility model has the counting detection working state and the backflushing and purging state at the same time, and can be freely switched between the two states, thereby solving the problems of pollution, blockage and dust accumulation of the duck-billed air inlet of the sensor of the dust particle counter, and without affecting the sensor, the flow meter and the environmental pollution, the flow stability and accuracy of the instrument are ensured, the air flow passing property of the pipeline and the sensor is improved, the service life and reliability of the power component, e.g., the fan, are guaranteed, the after-sales cost of the customer is reduced, and the operation quality of the dust particle counter is improved.

[0046] The above embodiments are only for describing the technical concept and characteristics of the utility model, the purpose is to enable people skilled in the art to understand the content of the utility model and implement it, and cannot limit the protection scope of the utility model, any equivalent change or modification according to the spirit and essence of the utility model should be covered in the protection scope of the utility model.

Claims

1. A dust particle counter, characterized by, The dust particle counter comprises a counting sensor, a power component for at least suction air flow, a first valve, a second valve, a third valve, a first filter and a second filter; The counting sensor comprises an air inlet nozzle and an air outlet nozzle; The power component comprises an air inlet and an air outlet; The third valve comprises a first passage and a second passage, both of which can communicate with the air outlet; The air outlet nozzle, the first valve, the air inlet, the air outlet, the first passage of the third valve and the first filter are sequentially communicated; The second valve respectively communicates with the atmosphere and the air inlet, and the second filter respectively communicates with the second passage of the third valve and the air outlet nozzle.

2. The dust particle counter according to claim 1, characterized in that The dust particle counter comprises a counting detection working state and a backwashing purge state; When the dust particle counter is in the counting detection working state, the first valve is in an open state, the second valve is in a closed state, the first passage of the third valve is in an open state and the second passage is in a closed state; When the dust particle counter is in the backwashing purge state, the first valve is in a closed state, the second valve is in an open state, the first passage of the third valve is in a closed state and the second passage is in an open state.

3. The dust particle counter according to claim 1, characterized in that, The first valve, the second valve and the third valve are all electromagnetic valves.

4. The dust particle counter according to claim 3, characterized in that The first valve is a one-way normally open electromagnetic valve, the second valve is a one-way normally closed electromagnetic valve, and the third valve is a two-position five-way electromagnetic valve.

5. The dust particle counter according to claim 3 or 4, characterized in that The dust particle counter further comprises a control system, which is in communication connection with the first valve, the second valve and the third valve respectively.

6. The dust particle counter according to claim 1, characterized in that, The power component is a fan or an air pump; and / or, the dust particle counter further comprises a flow meter, which is in communication with the first filter.

7. The dust particle counter according to claim 1, characterized in that, The dust particle counter further comprises a plurality of anti-static rubber pipes, each component being in communication through the anti-static rubber pipes respectively.

8. The dust particle counter according to claim 1, characterized in that, The dust particle counter further comprises a plurality of three-way valves, the air outlet nozzle being in communication with the air inlet end of the first valve and the air outlet end of the second filter through one three-way valve, and the air outlet end of the first valve being in communication with the air outlet end of the second valve and the air inlet through one three-way valve.

9. The dust particle counter according to claim 1, characterized in that, The counting sensor, the first valve and the power component are sequentially arranged along a first track respectively; The third valve and the first filter are sequentially arranged along a second track respectively; The second valve and the second filter are sequentially arranged along a third track respectively; The third track is located between the first track and the second track.

10. The dust particle counter according to claim 9, characterized in that The first track, the second track and the third track are arranged in parallel with each other.

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