201215874 六、發明說明： 【發明所屬之技術領域】 本發明係種氣體，_於_譬如為二氧化碳等氣體， 特別是-種設計為鸚鴣螺狀之態樣，而可大幅縮小體積之氣體伯測器。 【先前技術】 現在市場上販售的二氧化碳侧器或二氧化碳分析儀，幾乎都是採用 非分散式紅外線（Non-disPersiveInfrared,_R)吸收法來感測。它的_ ' 係運用氣體對紅外線特殊波長的吸收特性以及氣體濃度與吸收量成正比之 •特性，例如一氧化碳對4.7微米（_)波長、二氧化碳對4.3微米（μιη) 波長之紅外線的吸收性最強，得以偵測特定氣體濃度。 典型之氣體偵測器，請參閱美國公告第5，163,332號專利，係為直線型 之態樣，主要利用直線型管道、兩端分別連接有光源與感測器，而可供待 測氣體於管道内吸收由光源所發出之光線中，特定波長之光線，然後，再 由感測器來予以接收、判別。因為是採用直線型的設計，因此整體長度較 長’攜帶、包裝運送都較不方便；同時，直線型管道的設計，也很容易使 ® 光線在沒有經過太多氣體吸收後，即受到感測器的接收，因此，判別氣體 上會遇到較大的問題。 » 另外’如美國公告第7,244,939號專利’係設計為同心圓的態樣，感測 器置放於同心圓的中心’而光源則設置於外圈上，使得光源所發出之光線， 能夠沿著同心圓環繞的方式，來進入感測器内，有效於有限空間内，增加 光線行經的光路路徑。然而，因為此結構較為複雜，且氣體感測器之體積 不大，因此組裝上不太容易，變相增加了工時、提高了製造成本。 201215874 【發明内容】 審於以上的問題，本發明的主要目在於提出一種氣體偵測器，具有足 夠之光路路徑來提供氣體吸收特定波長之光線，同時結構簡單、體積小， 且易於組敦、運送’藉此’可大體上解決前述先前技術之缺失。 因此，為達上述目的，本發明提出一種氣體偵測器，包含有光源件、 光源腔至、感測器、感測腔室、以及連接通道，連接通道於兩端分別連接 光源腔室與感難室，而光聽與感·齡職ϊ於絲腔室以及感測 腔室内，且連接通道係為非同心圓之螺旋狀通道；較佳者，為與兩端之光 源腔室、感測腔室構成鸚鵡螺之態樣。而可提供足夠之光路路徑，給予引 入之待測氣體吸收部份波長之光線，而後供感測賊測光線並予以判別。 且其中，光源腔室乃大於感測腔室，且連接通道之橫截面，係沿著光 源腔室漸縮至感測腔室，而可大幅降低熱污染的可能性。 為使對本發明的目的、特徵及其功能有進-步的了解，兹配合圖式詳 細說明如下： 【實施方式】 根據本發明所揭露之氣體偵·，請參考第i _示，係為本發明之 氣體偵測器的立體分解示意圖，氣__主要包含有基板1(^測器21、 光源件22、基座30、以及上蓋體4〇。 基板10主要是用以承載上述各元件，且其可為一印刷電路板（PCB)， 可供”光源件22、感測器2i形成電性連接，並與外界侧判斷電路連接 (容後詳述而基板H)上具有複數固定孔u，其可為單一尺寸或 是多種尺相混合。感測H 2丨賴跋基板1G之適纽置上，如第2八圖 201215874 所不，承上所述，若基板10為印刷電路板，則感測器2ι可為表面黏著一 件（SMD)或是插人件（DIP)，而可與其構成電性連接。 疋 而基座30之兩端’分別具有第一穿孔S1及安襄件％，安裝件幻具 第二穿孔33，且第二穿孔33是與基座3()的橫截面平行，因此，當基座= 裝設固定於基板H)上時，如第2B圖所示，第一穿孔31可供感測器^ 應穿出’第-穿孔31的孔徑以略大於感測器21為佳。再如第2c圖所示 '光源件22穿設於第二穿孔33中，第二穿孔33的孔徑以略大於光源件不22 籲為佳，且光源件22可為插入件，而可與基板1〇構成電性連接。 接著’請同時參照第3八、3B圖，上蓋體4〇包含有缺口你、感測腔室 43、光源腔室42以及連接通道41，整體上蓋體4q形狀以構成—個譬如鹤 鵡螺（Nautilus)型態之非線性、非同心圓之螺旋狀通道為佳；就其態樣來 說’其向徑和切線的夾角保持一定。當上蓋體4〇結合於基座3〇上時，可 形成密閉空間’感測腔室43恰好罩設於感測器21上，光源腔室42恰好罩 設於光源件22上，而缺口 46之雜恰料設於絲件32上；—般來說， 鲁氣體偵測器用的光源件22 ’常見者為紅外線光源，树免其發光時的熱污 γ染’光源腔室42宜大於_腔室43，且較佳者，連接通道41之橫截面是 沿著光源腔室42漸縮至感測腔室43，其中，光源件22之可發出光線端係 朝向連接通道，且位於感測腔室43内，而光源件22之接腳端係裸露於 缺口 46外’且電性連接至基板1〇。同時，因為需要光線於内部反射，因此 連接通道41之_表面具有反规，來增加光騎射的比率。 而上蓋體40之外侧延伸有複數個延伸部47，每—延伸部47具有一第 二固定孔48，而第二固定孔48係對應基板1〇上的第一固定孔n，上蓋體 201215874 40可透過固定元件70 (譬如為螺絲）穿過基板10之第一固定孔u及第二 固定孔48來予以固定於基板10上。同時，上蓋體4〇上具有至少一個透氣 通槽44，其可為沿著螺旋狀通道之側面開設，在此係以設有三個透氣通槽 44為例，並於其上貼附有不織布49，防止灰塵進入，如第3B圖所示。同 時，光路路徑的末端，換句話說，接近感測器21之上方，於感測腔室43 上具有反射斜面45，較佳者為45度斜角，而能夠有效將光線導引入感測器 請參閱第4圖，顯示光源件22所發出之光線的祕路徑6卜光線於連 接通道41内行進’文到其内側表面之反光膜反射而持續前進同時，連接 通道41内之氣齡吸收特定波長之光線（譬如—氧化碳對4.7微米（叩） 波長、—氧化碳對4.3微米（_)波長之紅外線的吸收性最強》最後光線 透過反射斜© 45之反射統職峨人制^ 2卜㈣分概，即可判別 出特定的待測氣體。 乃利用非線性、非同心圓之螺旋狀通道201215874 VI. Description of the Invention: [Technical Field to Be Invented by the Invention] The present invention relates to a gas, such as a gas such as carbon dioxide, in particular, a species designed to be a parrot snail, and which can greatly reduce the volume of gas. Detector. [Prior Art] Nearly all of the carbon dioxide side devices or carbon dioxide analyzers currently on the market are sensed by a non-distributed infrared (Non-disPersive Infrared, _R) absorption method. Its _ ' is based on the absorption characteristics of the gas to the specific wavelength of the infrared ray and the concentration of the gas is proportional to the absorption. For example, carbon monoxide has the strongest absorption of 4.7 micron (_) wavelength, and carbon dioxide is 4.3 micron (μιη) wavelength of infrared light. To detect specific gas concentrations. For a typical gas detector, please refer to US Patent No. 5,163,332, which is a linear type. It mainly uses a linear pipe with two ends connected to a light source and a sensor, and the gas to be tested is available. The light in the pipe absorbs light of a specific wavelength in the light emitted by the light source, and then is received and discriminated by the sensor. Because it is a straight-line design, the overall length is long, and it is inconvenient to carry and pack. At the same time, the design of the straight-line pipe makes it easy for the light to be sensed without being absorbed by too much gas. The receiver receives, therefore, a large problem is encountered in discriminating the gas. » In addition, 'U.S. Patent No. 7,244,939 is designed to be concentric, the sensor is placed at the center of the concentric circle' and the light source is placed on the outer ring so that the light emitted by the light source can The concentric circle surrounds the sensor and is effective in a limited space to increase the path of the light path. However, since this structure is complicated and the volume of the gas sensor is not large, assembly is not easy, and the disguise increases the man-hour and increases the manufacturing cost. 201215874 SUMMARY OF THE INVENTION In view of the above problems, the main object of the present invention is to provide a gas detector having a sufficient optical path to provide gas absorption of light of a specific wavelength, while having a simple structure, small volume, and easy assembly. Shipping 'by this' can substantially solve the aforementioned lack of prior art. Therefore, in order to achieve the above object, the present invention provides a gas detector comprising a light source member, a light source chamber, a sensor, a sensing chamber, and a connecting passage, and the connecting passage is respectively connected to the light source chamber and the sensing at both ends Difficult room, and light and sense, the age of work in the silk chamber and the sensing chamber, and the connecting channel is a non-concentric spiral channel; preferably, the light source chamber with both ends, sensing The chamber constitutes the nautilus. A sufficient optical path can be provided to allow the introduced gas to absorb a part of the wavelength of the light, and then the sensing thief measures the light and discriminates. Wherein, the light source chamber is larger than the sensing chamber, and the cross section of the connecting passage is tapered along the light source chamber to the sensing chamber, and the possibility of thermal pollution can be greatly reduced. In order to further understand the object, features and functions of the present invention, the following detailed description will be given with reference to the following drawings: [Embodiment] According to the gas detection disclosed in the present invention, please refer to the i- The three-dimensional exploded view of the gas detector of the present invention mainly includes a substrate 1 (a detector 21, a light source member 22, a base 30, and an upper cover 4). The substrate 10 is mainly used to carry the above components. And it can be a printed circuit board (PCB), which can be used to form an electrical connection between the light source member 22 and the sensor 2i, and is connected to the external side judging circuit (the substrate H is detailed later) and has a plurality of fixing holes u. It can be a single size or a plurality of scales. It is suitable for sensing the H 2 on the substrate 1G, as shown in Figure 2, 201215874. If the substrate 10 is a printed circuit board, The sensor 21 may be a surface-bonded piece (SMD) or a plug-in piece (DIP), and may be electrically connected thereto. The two ends of the base 30 have a first perforation S1 and an ampoule %, respectively. The mounting member has a second perforation 33 and the second perforation 33 is flat with the cross section of the base 3 () Therefore, when the pedestal=installation is fixed on the substrate H), as shown in FIG. 2B, the first through hole 31 is provided for the sensor to pass through the aperture of the first-perforation 31 to be slightly larger than the sensor. Preferably, as shown in Fig. 2c, the light source member 22 is disposed in the second through hole 33, the aperture of the second through hole 33 is preferably slightly larger than the light source member, and the light source member 22 can be an insert member. It can be electrically connected to the substrate 1 接着. Next, please refer to the 3rd and 3rd drawings, the upper cover 4 〇 includes the notch, the sensing chamber 43, the light source chamber 42 and the connecting channel 41, and the whole upper cover The shape of 4q is preferably a non-concentric spiral channel of the Nautilus type; in its aspect, the angle between the diameter and the tangent is kept constant. When the upper cover 4 is When the cymbal is coupled to the pedestal 3 ,, a closed space can be formed. The sensing chamber 43 is disposed on the sensor 21, and the light source chamber 42 is just placed on the light source member 22, and the gap 46 is mixed. It is disposed on the wire member 32; in general, the light source member 22' used for the Lu gas detector is an infrared light source, and the tree is free from light. The heat gamma dyeing light source chamber 42 is preferably larger than the _ chamber 43 , and preferably, the cross section of the connecting channel 41 is tapered along the light source chamber 42 to the sensing chamber 43 , wherein the light source member 22 can The light emitting end faces the connecting channel and is located in the sensing chamber 43 , and the pin end of the light source member 22 is exposed outside the notch 46 and electrically connected to the substrate 1 . Meanwhile, since light is required to be internally reflected, Therefore, the surface of the connecting channel 41 has an anti-regulation to increase the ratio of light riding. The outer side of the upper cover 40 has a plurality of extending portions 47, each of which has a second fixing hole 48 and a second fixing hole. The 48 series corresponds to the first fixing hole n on the substrate 1 , and the upper cover 201215874 40 can be fixed to the substrate 10 through the fixing hole 70 (for example, a screw) through the first fixing hole u and the second fixing hole 48 of the substrate 10 . on. At the same time, the upper cover 4 has at least one venting groove 44 which can be opened along the side of the spiral passage. Here, three venting grooves 44 are provided as an example, and a non-woven fabric 49 is attached thereto. To prevent dust from entering, as shown in Figure 3B. At the same time, the end of the optical path, in other words, above the proximity sensor 21, has a reflective bevel 45 on the sensing chamber 43, preferably a 45 degree bevel, which effectively introduces the light guide into the sensing Referring to FIG. 4, the secret path of the light emitted by the light source member 22 is shown. The light is reflected in the connecting channel 41 and continues to advance by the reflective film on the inner side surface thereof. Light of a specific wavelength (for example, carbon monoxide has a strong absorption of 4.7 micron (叩) wavelength, and carbon oxide has the strongest absorption of infrared light of 4.3 micron (_) wavelength.) The last light is transmitted through the reflection oblique © 45 reflection system. Bu (four) general, you can identify the specific gas to be tested. Is the use of nonlinear, non-concentric spiral channel
長之光線，提高偵測的正確性。 本發明揭露一種氣體偵測器，乃5 (譬如為鸚鵡螺之型態），不僅體積小 大幅降低組紅時與成本。同時，光$Long light, improve the accuracy of detection. The invention discloses a gas detector, which is 5 (for example, a nautilus type), which not only has a small volume, but also greatly reduces the group red time and cost. At the same time, light $
曼靶圍。關於本發明所界定 【圖式簡單說明】 爛藝如上，然其並非用·定本發明。在 1内’所為之更動與潤飾’均屬本發明之專利保 之保護範圍請參考所附之t請專利範圍。 201215874 第1圖係為本發明氣體偵測器之立體分解示意圖。 第2A〜2C圖係為本發明氣體偵測器之底部部件組裝之示意圖。 第3A〜3B圖係為本發明氣體偵測器之組裝完成之立體示意圖。 第4圖係為本發明氣體偵測器之光路路徑示意圖。 【主要元件符號說明】 10基板 11第一固定孔 21感測器 22光源件 30基座 31第一穿孔 32安裝件 33第二穿孔 40上蓋體 41連接通道 42光源腔室 43感測腔室 44透氣通槽 45反光斜面 46缺口 47延伸部 48第二固定孔 201215874 49 不織布 61 光路路徑 70 固定元件Mann target. Regarding the definition of the present invention [Simplified description of the drawings] The rotten art is as above, but it is not intended to be the invention. The scope of protection of the patents of the present invention is the scope of protection of the invention. 201215874 Fig. 1 is a perspective exploded view of the gas detector of the present invention. 2A to 2C are schematic views showing the assembly of the bottom member of the gas detector of the present invention. 3A to 3B are perspective views of the assembly of the gas detector of the present invention. Figure 4 is a schematic view of the optical path of the gas detector of the present invention. [Main component symbol description] 10 substrate 11 first fixing hole 21 sensor 22 light source member 30 base 31 first perforation 32 mounting member 33 second perforation 40 upper cover 41 connecting passage 42 light source chamber 43 sensing chamber 44 Breathable channel 45 reflective slope 46 notch 47 extension 48 second fixing hole 201215874 49 non-woven fabric 61 optical path 70 fixed component