CN110082479B - Air suction type smoke detection air chamber structure and method - Google Patents
Air suction type smoke detection air chamber structure and method Download PDFInfo
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- CN110082479B CN110082479B CN201910222147.8A CN201910222147A CN110082479B CN 110082479 B CN110082479 B CN 110082479B CN 201910222147 A CN201910222147 A CN 201910222147A CN 110082479 B CN110082479 B CN 110082479B
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- 238000001514 detection method Methods 0.000 title claims abstract description 73
- 239000000779 smoke Substances 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 6
- 229920000742 Cotton Polymers 0.000 claims description 13
- 238000005259 measurement Methods 0.000 claims 1
- 239000000428 dust Substances 0.000 description 8
- 238000001914 filtration Methods 0.000 description 7
- 230000035945 sensitivity Effects 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0011—Sample conditioning
- G01N33/0016—Sample conditioning by regulating a physical variable, e.g. pressure or temperature
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Abstract
本发明公开了一种吸气式烟雾探测气室结构及方法，包括一个本体，在本体内部设有进气通道、出气通道、取气支路、出气支路、吸气风机和探测暗室，所述的进气通道一端与设置在本体侧壁上的进气口相通，另一端与吸气风机的吸气口相通；所述的出气通道的一端与设置在本体上的所述的出气口相通，另一端与吸气风机的排气口相连通；所述的取气支路一端与出气通道相连通，另一端与探测暗室的入口相连通，探测暗室的出口与出气支路的一端相连通，出气支路的另一端与进气通道相连；所述的吸气风机的排气口的压力大于吸气口的压力。
The invention discloses a structure and method of an air-breathing smoke detection air chamber, comprising a body, and an air inlet channel, an air outlet channel, an air intake branch, an air outlet branch, an air suction fan and a detection darkroom are arranged inside the main body. One end of the air inlet passage is communicated with the air inlet arranged on the side wall of the body, and the other end is communicated with the air inlet of the suction fan; one end of the air outlet passage is communicated with the air outlet arranged on the body , the other end is communicated with the exhaust port of the suction fan; one end of the air intake branch is communicated with the air outlet channel, the other end is communicated with the entrance of the detection darkroom, and the outlet of the detection darkroom is communicated with one end of the air outlet branch. , the other end of the air outlet branch is connected with the air inlet passage; the pressure of the air outlet of the air suction fan is greater than the pressure of the air inlet.
Description
Technical Field
The invention belongs to the technical field of fire smoke detection, and particularly relates to a structure and a method of an air suction type smoke detection air chamber.
Background
The traditional air suction type smoke detection product mainly comprises two air suction modes, wherein one mode is to suck all the detected gas into a detection cavity for detection; the other is that a branch is arranged from the air inlet to lead a part of the gas to be detected to enter the detection cavity and then to be discharged from the position of the air inlet close to the air suction fan, and the airflow inlet and the airflow outlet of the detection cavity are both arranged at the front section of the air suction fan.
The inventor finds that the first way is to let all the gas to be detected flow through the detection chamber, which is easy to aggravate the dust accumulation in the detection chamber. If a filtering device is additionally arranged at the air inlet, the filter needs to be frequently replaced, and the maintenance cost is increased. In the second mode, because the airflow inlet and the airflow outlet of the detection cavity are both arranged at the front section of the air suction fan, the pressure difference between the inlet and the outlet is small, the airflow flowing through the detection cavity is small, and the response time and the sensitivity of detection can be reduced.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a gas suction type smoke detection gas chamber structure, gas is taken from a gas outlet of a gas chamber and enters a detection cavity, gas is exhausted from a gas inlet of the gas chamber, the amount of the gas to be detected flowing through the detection cavity is increased by utilizing the gas pressure difference between the gas outlet and the gas inlet, and the response time and the sensitivity of detection are provided.
The first invention of the invention aims to provide a gas suction type smoke detection chamber structure, and the technical scheme adopted for realizing the purpose is as follows:
an air suction type smoke detection air chamber structure comprises a body, wherein an air inlet channel, an air outlet channel, an air taking branch, an air outlet branch, an air suction fan and a detection darkroom are arranged in the body, one end of the air inlet channel is communicated with an air inlet arranged on the side wall of the body, and the other end of the air inlet channel is communicated with an air suction port of the air suction fan; one end of the air outlet channel is communicated with the air outlet arranged on the body, and the other end of the air outlet channel is communicated with an air outlet of the air suction fan; one end of the gas taking branch is communicated with the gas outlet channel, the other end of the gas taking branch is communicated with the inlet of the detection darkroom, the outlet of the detection darkroom is communicated with one end of the gas outlet branch, and the other end of the gas outlet branch is connected with the gas inlet channel; the pressure of the exhaust port of the air suction fan is greater than that of the air suction port.
Furthermore, a gas filtering device is arranged on the gas taking branch.
Further, the body comprises a shell and an upper cover, and the shell and the upper cover are detachably connected together.
Furthermore, the air flow channels on the two sides of the filter cotton are arranged diagonally, so that more air flows can pass through the filter cotton.
Furthermore, the air inlet channel, the air outlet channel, the air taking branch and the air outlet branch in the body are formed by the partition plates arranged in the body.
The second invention of the invention aims to provide an air suction method based on an air suction type smoke detection chamber structure, and the technical scheme adopted for realizing the purpose is as follows:
the tested gas enters from the gas inlet, then enters the gas inlet channel, enters the gas suction fan after the gas suction of the gas suction fan, is discharged from the gas outlet of the gas suction fan, and enters the gas outlet channel; the air outlet channel is provided with an air taking branch, and an air outlet branch is arranged at the position of the air inlet close to the air suction fan. Because the pressure of the air outlet of the air suction fan is high, and the pressure of the air inlet is low, the pressure of the inlet of the air taking branch is high, the pressure of the outlet of the air outlet branch is low, and partial gas to be detected enters from the inlet of the air taking branch through the air pressure difference and enters the detection darkroom through the filtering device; the detected gas is detected by the detection darkroom, returns to the air inlet channel from the air outlet branch and is exhausted from the air outlet chamber through the air suction fan.
The invention has the following beneficial effects:
1. according to the invention, by arranging the integral structure, the gas taking branch is arranged on the gas outlet channel, and only a small part of gas is detected, so that dust accumulation in the detection darkroom is reduced; the pressure difference between the air suction port and the air exhaust port of the air suction fan is utilized, so that more air flows pass through the detection cavity, and the response time and the sensitivity of gas detection are improved.
2. The large granule dust that filter equipment surveyed the influence filters, and the dust of avoiding daily cleaning or the large granule thing that non-early fire arouses on the one hand get into to survey the chamber and cause the wrong report, and on the other hand has also avoided surveying the chamber and has been polluted by the dust.
3. The filter device is arranged on the gas taking branch, only part of gas entering the detection darkroom is filtered, and most of gas and large-particle dust are directly discharged from the gas outlet due to inertia. The filtering air quantity of the filtering device is less, the replacement period can be prolonged, and the maintenance cost is saved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is an exploded view of a gas-breathing smoke detection chamber according to the present invention;
FIG. 2 is a perspective view of the air chamber of the present invention without the upper cover;
FIG. 3 is a top view of the air chamber of the present invention without the upper cover;
FIG. 4 is a perspective view of the housing of the present invention;
in the figure: 1, a shell, 2, an upper cover, 3, a detection darkroom, 4, an air suction fan, 5, 6, a filter cotton cover, 11, 12, 41, an air suction port, 42, 31, an inlet and 32 outlets; 15, a cavity; 16 wire outlet holes; 17 inlet channels and 18 outlet channels.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "up", "down", "left" and "right" in the present invention, if any, merely indicate correspondence with up, down, left and right directions of the drawings themselves, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, rather than indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
As described in the background art, the conventional inhalation type smoke detection products mainly have two inhalation modes, one is to inhale all the gas to be detected into the detection cavity for detection; the other is that a branch is arranged from the air inlet to lead a part of the gas to be detected to enter the detection cavity and then to be discharged from the position of the air inlet close to the air suction fan, and the airflow inlet and the airflow outlet of the detection cavity are both arranged at the front section of the air suction fan. The inventor finds that the first way is to let all the gas to be detected flow through the detection chamber, which is easy to aggravate the dust accumulation in the detection chamber. If a filtering device is additionally arranged at the air inlet, the filter needs to be frequently replaced, and the maintenance cost is increased. In the second mode, because the airflow inlet and the airflow outlet of the detection cavity are both arranged at the front section of the air suction fan, the pressure difference between the inlet and the outlet is small, the airflow flowing through the detection cavity is small, and the response time and the sensitivity of detection can be reduced.
In order to solve the technical problems, the application provides an air suction type smoke detection air chamber structure which comprises a body, wherein an air inlet channel, an air outlet channel, an air taking branch, an air outlet branch, an air suction fan and a detection darkroom are arranged in the body; one end of the air outlet channel is communicated with the air outlet arranged on the body, and the other end of the air outlet channel is communicated with an air outlet of the air suction fan; one end of the gas taking branch is communicated with the gas outlet channel, the other end of the gas taking branch is communicated with the inlet of the detection darkroom, the outlet of the detection darkroom is communicated with one end of the gas outlet branch, and the other end of the gas outlet branch is connected with the gas inlet channel; the pressure of the exhaust port of the air suction fan is greater than that of the air suction port. According to the invention, through the design of the integral structure, the gas taking branch is arranged on the gas outlet channel, and only a small part of gas is detected, so that the dust accumulation in the detection darkroom is reduced; the pressure difference between the air suction port and the air exhaust port of the air suction fan is utilized, so that more air flows pass through the detection cavity, and the response time and the sensitivity of gas detection are improved.
In a typical embodiment of the present application, as shown in fig. 1, the air-breathing smoke detection air chamber structure of the present invention includes a housing 1, an upper cover 2, a detection dark room 3, an air-breathing fan 4, filter cotton 5, and a filter cotton cover 6.
As shown in fig. 1, the housing 1 and the upper cover 2 are fixed by four screws and nuts, and a sealing strip is arranged between the housing 1 and the upper cover 2, and the housing 1 and the upper cover 2 are combined together to form the body structure; and the air suction fan 4 in this embodiment is fixed to the bottom surface of the housing by two screws and nuts. The detection darkroom 3 is fixed on the bottom surface of the shell through four screws and nuts. The filter cotton cover 6 fixes the filter cotton 5 through two screws.
An air inlet channel 17, an air outlet channel 18, an air taking branch 13, an air outlet branch 14, an air suction fan 4 and a detection darkroom 3 are arranged in the shell 1, one end of the air inlet channel 17 is communicated with an air inlet arranged on the side wall of the body, and the other end of the air inlet channel 17 is communicated with an air suction port of the air suction fan 4; one end of the air outlet channel 18 is communicated with the air outlet arranged on the body, and the other end is communicated with the air outlet of the air suction fan 4; one end of the gas taking branch is communicated with the gas outlet channel, the other end of the gas taking branch is communicated with the inlet of the detection darkroom, the outlet of the detection darkroom is communicated with one end of the gas outlet branch, and the other end of the gas outlet branch is connected with the gas inlet channel; the pressure of the exhaust port of the air suction fan is greater than that of the air suction port.
As shown in fig. 2 and 3, the suction fan 4 is a selected existing centrifugal blower, and the gas to be measured enters the air chamber through the gas inlet 11, and the air flow is sucked by the suction fan 4, enters the air inlet 41 of the suction fan, is discharged from the air outlet 42, and is discharged out of the air chamber through the air outlet 12.
As shown in fig. 2 and 3, the air pressure at the air outlet 12 of the air cell is large, and the air pressure at the air inlet 11 is small. Under the action of the pressure difference, part of the gas to be detected enters from the gas taking branch 13, passes through the filter cotton 5 and enters the detection dark room 3 from the inlet 31. The detected air flow passes through the chamber 15 from the outlet 32 to the outlet branch 14, from where it is merged into the air flow entering the air inlet 11, sucked by the suction fan 4 and finally discharged out of the air chamber.
As shown in fig. 2, the air flow channels on both sides of the filter cotton 5 in this embodiment are diagonally arranged (specifically, see the channels diagonally arranged on the left and right sides of the filter cotton 5), which is beneficial for more air flow passing through the filter cotton.
As shown in fig. 2, the signal lines of the circuit board in the air chamber are connected to the external circuit board through the sealed joint from the outlet holes 16. The gas detection sensor is installed in the detection darkroom 3, and the specific installation mode is completely the same as that in the prior art, which is not described herein again.
As shown in fig. 4, the exhaust port 42 of the suction fan 4 is located below the air outlet branch 14, and the two paths are independent and not communicated with each other.
According to the invention, a measured gas enters from a gas inlet, then enters into a gas inlet channel, enters into a gas suction fan after being sucked by a gas suction fan, then is discharged from a gas outlet of the gas suction fan, and enters into a gas outlet channel; the air outlet channel is provided with an air taking branch, and an air outlet branch is arranged at the position of the air inlet close to the air suction fan. Because the pressure of the air outlet of the air suction fan is high, and the pressure of the air inlet is low, the pressure of the inlet of the air taking branch is high, the pressure of the outlet of the air outlet branch is low, and partial gas to be detected enters from the inlet of the air taking branch through the air pressure difference and enters the detection darkroom through the filtering device; the detected gas is detected by the detection darkroom, returns to the air inlet channel from the air outlet branch and is exhausted from the air outlet chamber through the air suction fan.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910222147.8A CN110082479B (en) | 2019-03-22 | 2019-03-22 | Air suction type smoke detection air chamber structure and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910222147.8A CN110082479B (en) | 2019-03-22 | 2019-03-22 | Air suction type smoke detection air chamber structure and method |
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| CN110082479A CN110082479A (en) | 2019-08-02 |
| CN110082479B true CN110082479B (en) | 2021-11-23 |
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| CN201910222147.8A Active CN110082479B (en) | 2019-03-22 | 2019-03-22 | Air suction type smoke detection air chamber structure and method |
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| CN112649558B (en) * | 2019-10-09 | 2023-08-04 | 研能科技股份有限公司 | Gas detection module |
| CN112233363A (en) * | 2020-09-28 | 2021-01-15 | 上海嘉筠通信技术有限公司 | Method for preventing water vapor interference from interfering with alarm accuracy of smoke alarm |
| CN115078640A (en) * | 2022-06-10 | 2022-09-20 | 南昌攀藤科技有限公司 | Air detector |
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| MY165167A (en) * | 2010-03-05 | 2018-02-28 | Xtralis Technologies Ltd | Improved dust discrimination for sensing systems |
| CN106124259A (en) * | 2016-06-15 | 2016-11-16 | 安徽省绿巨人环境技术有限公司 | A kind of device testing air quality |
| CN205845239U (en) * | 2016-07-27 | 2016-12-28 | 郑州森鹏电子技术有限公司 | A kind of active inspiration formula smoke detector |
| CN106781205A (en) * | 2017-02-15 | 2017-05-31 | 西安硅光电子科技有限公司 | A kind of pole early stage air suction type gas fire detector and detection method |
| CN206906345U (en) * | 2017-07-10 | 2018-01-19 | 九江中船消防自动化有限公司 | A kind of aspirating smoke detector |
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Effective date of registration: 20230104 Address after: 1206, Floor 12, Hanyu Jingu Artificial Intelligence Building, Jinan Area, China (Shandong) Pilot Free Trade Zone, 250000 Shandong Province Patentee after: Shandong Shanke Safety Technology Co.,Ltd. Address before: 250014 No. 19, ASTRI Road, Lixia District, Shandong, Ji'nan Patentee before: INSTITUTE OF AUTOMATION, SHANDONG ACADEMY OF SCIENCES |