CN214174228U

CN214174228U - High-performance semiconductor type combustible gas detector

Info

Publication number: CN214174228U
Application number: CN202120249117.9U
Authority: CN
Inventors: 关彤; 任习军; 刘亚飞
Original assignee: Hubei Tiandi Lightning Technology Co ltd
Current assignee: Hubei Tiandi Lightning Technology Co ltd
Priority date: 2021-01-28
Filing date: 2021-01-28
Publication date: 2021-09-10
Anticipated expiration: 2031-01-28

Abstract

The utility model provides a high-performance semiconductor type combustible gas detector, which comprises a shell, a detection part arranged in the shell and a man-machine interaction part arranged on the surface of the shell, wherein the detection part is of a disc-shaped structure and comprises an air supply channel, a semiconductor element and a heater which are sequentially arranged in a circular shape from outside to inside, the air supply channel is provided with an adjacent air inlet pipe and an adjacent air outlet pipe on one side close to the end head of the shell, and the air inlet pipe is also provided with a micro air pump; the utility model enlarges the contact surface between the semiconductor and the air as much as possible under the condition of keeping the volume unchanged through the air supply channel which is arranged annularly, so that the resistance change of the semiconductor material is more accurate, thereby improving the detection precision; the gas detection device is also provided with a plurality of semiconductor rings, so that different gases are detected by using different semiconductor rings respectively, the application range is enlarged, the use convenience is improved, and the cost is saved.

Description

High-performance semiconductor type combustible gas detector

Technical Field

The utility model relates to a combustible gas detects technical field, especially relates to a semiconductor formula combustible gas detector of high performance.

Background

The combustible gas detector is an instrument and meter tool for detecting gas leakage concentration, and mainly refers to a portable/handheld gas detector. The gas sensor is mainly used for detecting the types of gases existing in the environment, and the combustible gas detector is used for detecting the components and the content of the gases. It is generally recognized that the definition of gas sensors is based on the classification of the object to be detected, i.e., all sensors used to detect the composition and concentration of a gas are referred to as gas detectors, whether physically or chemically. For example, sensors that sense gas flow are not considered gas sensors, but thermal conductivity gas analyzers are among the important gas sensors, although they sometimes use a generally consistent sensing principle.

At present, the combustible gas detector mainly comprises three principles of a semiconductor type, a catalytic combustion type and an electrochemical type, wherein the catalytic combustion type combustible gas detector is the most widely used one at present, but the gas detector can only be used for detecting the total content of all combustible gases in a universal manner, but cannot be used for correspondingly detecting the content of a specific gas, so that the gas detector has certain limitation in use. In contrast, semiconductor gas detectors are manufactured using the principle that the electrical conductivity of some metal oxide semiconductor materials changes with the change of the ambient gas composition at a certain temperature. Therefore, the method can be used for detecting the concentration of a certain gas in a targeted manner, such as the detection of many gases, such as methane, ethane, propane, butane, alcohol, formaldehyde, carbon monoxide, carbon dioxide, ethylene, acetylene, vinyl chloride, styrene, acrylic acid and the like. Therefore, the detector has certain market demand and is used in a certain amount.

However, the conventional semiconductor gas detector also has certain problems. Firstly, the detection process of the semiconductor type gas detector needs the contact of the environmental gas and the semiconductor material, the larger the contact area is, the better the detection effect is, the commonly used semiconductor material at present is in the shape of sheet, cambered surface and the like, the contact area of the semiconductor material and the air is not large enough, and the final detection precision is caused to be deficient; secondly, the semiconductor type gas detector can only detect the gas corresponding to the used semiconductor material, and when different gases need to be detected, the detector needs to be replaced, so that the use is troublesome, and the cost is increased.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model provides a high-performance semiconductor type combustible gas detector, which solves the problem that the final detection precision is insufficient due to the fact that the contact area between a semiconductor material and air is not large enough in the semiconductor type combustible gas detector in the prior art; and the problems of troublesome use and high cost caused by detecting only the gas corresponding to the used semiconductor material are also solved.

According to the utility model discloses an embodiment, a high performance semiconductor formula combustible gas detector, including casing, the detection part of setting in the casing and the man-machine interaction part of setting at housing face, detection part is disc structure, and detection part includes from outer gas supply channel, semiconductor element and the heater that is the ring shape and sets gradually to interior, gas supply channel is equipped with adjacent intake pipe and outlet duct in the one side that is close to the casing end, still is provided with miniature air pump in the intake pipe wherein, semiconductor element's lateral surface is located gas supply channel's interior anchor ring, semiconductor element's medial surface and the lateral surface in close contact with of heater, and semiconductor element's length and gas supply channel cooperate.

Furthermore, the semiconductor element comprises a plurality of semiconductor rings with equal diameters, which are arranged in parallel, and the semiconductor rings are made of different semiconductor materials respectively.

Further, the human-computer interaction part comprises a display screen and an operation panel.

Furthermore, the detection part is arranged at one end of the shell, the part of the shell is matched with the detection part and is in a disc-shaped structure, the other part of the shell is in a square structure, and the display screen and the operation panel are sequentially arranged on the surface of the shell.

Further, the number of the semiconductor rings is 2-5.

The technical principle of the utility model is that: through the air supply channel that the annular set up, enlarge the contact surface of semiconductor and air as far as possible under the unchangeable circumstances of keeping the volume to promote and detect the precision.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the contact surface between the semiconductor and air is enlarged as much as possible under the condition of keeping the volume unchanged through the annularly arranged air supply channel, so that the resistance change of the semiconductor material is more accurate, and the detection precision is improved;

2. the utility model continuously pumps air into the air supply channel through the micro air pump to form stable air flow, so that the contact between the semiconductor material and the air is more uniform, and the semiconductor material is prevented from contacting local air only to generate errors;

3. the utility model discloses in be provided with a plurality of semiconductor rings to use different semiconductor rings to detect different gases respectively, enlarged application scope, thereby improved the convenience in use, practiced thrift the cost.

Drawings

Fig. 1 is a schematic front view of an embodiment of the present invention.

Fig. 2 is a schematic cross-sectional view of the detecting member of the present invention.

Fig. 3 is a schematic view of a middle semiconductor ring according to the present invention.

In the above drawings: 1. a housing; 2. a detection section; 3. an air inlet pipe; 4. an air outlet pipe; 5. a display screen; 6. an operation panel; 21. a gas supply channel; 22. a semiconductor element; 23. a heater; 31. a micro air pump; 221. a semiconductor ring.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and embodiments.

As shown in FIG. 1, the embodiment of the utility model provides a high performance semiconductor formula combustible gas detector, including casing 1, the detection part 2 of setting in casing 1 and the human-computer interaction part of setting on casing 1 surface, detection part 2 is disc structure, and the human-computer interaction part includes display screen 5 and operating panel 6. Specifically, the detection part 2 sets up in casing 1 one end wherein, and this part casing 1 cooperation detection part 2 is disc structure, 1 another part of casing is square structure and sets up display screen 5 and operating panel 6 on the surface, and when using, detection part 2 is located 1 tops of casing, and the below is display screen 5 and operating panel 6 in proper order to convenient to use person's operation and observation data.

As shown in fig. 2, in the present invention, the detecting part 2 includes a gas supply channel 21, a semiconductor element 22 and a heater 23, which are sequentially arranged in a circular shape from outside to inside, the gas supply channel 21 is provided with an adjacent gas inlet pipe 3 and a gas outlet pipe 4 at one side close to the end of the housing 1, wherein the gas inlet pipe 3 is further provided with a micro air pump 31, so that the external air is pumped into the gas supply channel 21 to form a stable airflow. The outer side surface of the semiconductor element 22 is located on the inner ring surface of the air supply channel 21, so that air entering the air supply channel is always in contact with the outer surface of the semiconductor element 22 in the flowing process, and the semiconductor element 22 is subjected to resistance change to achieve a detection function. In addition, the inner side surface of the semiconductor element 22 is closely contacted with the outer side surface of the heater 23, and the length of the semiconductor element 22 is matched with the air supply channel 21, so that the temperature of the semiconductor element 22 can be controlled at any time by the heater 23, preferably in a heating wire mode, and the semiconductor element is in a state of being sensitive to the specific gas.

As shown in fig. 3, in a further embodiment of the present invention, the semiconductor element 22 includes a plurality of semiconductor rings 221 with equal diameters, which are arranged in parallel, and the semiconductor rings 221 are made of different semiconductor materials. The number of the semiconductor rings 221 is 2-5, four parallel semiconductor rings 221 are preferably used in the embodiment, and different gases are detected through the semiconductor rings 221 made of different materials, so that the application range is expanded, the use convenience is improved, and the cost is saved.

The utility model discloses when using, introduce the outside air through the miniature air pump 31 in the intake pipe 3, then flow in air feed channel 21 and finally discharge from outlet duct 4, in the contact of flow in-process air and the semiconductor ring 221 that is heated to appropriate temperature, the specific gas that wherein contains makes semiconductor ring 221 on the semiconductor material's resistance change to calculate the reaction on display screen 5 through a series of electronic component with it. By connecting different semiconductor rings 221 to a circuit and adjusting the use temperatures of the different semiconductor rings 221, detection can be performed for different gases.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. The utility model provides a high performance semiconductor formula combustible gas detector which characterized in that: including casing, the detection part of setting in the casing and the human-computer interaction part of setting at housing face, detection part is disc structure, and detection part includes from outer gas supply channel, semiconductor element and the heater that is the ring shape and sets gradually to interior, gas supply channel is equipped with adjacent intake pipe and outlet duct in the one side that is close to the casing end, wherein still is provided with miniature air pump in the intake pipe, semiconductor element's lateral surface is located gas supply channel's interior anchor ring, semiconductor element's medial surface and the lateral surface in close contact with of heater, and semiconductor element's length and gas supply channel cooperate.

2. The high performance semiconductor type combustible gas detector according to claim 1, wherein: the semiconductor element comprises a plurality of semiconductor rings with equal diameters, which are arranged in parallel, and the semiconductor rings are made of different semiconductor materials respectively.

3. The high performance semiconductor type combustible gas detector according to claim 1, wherein: the human-computer interaction component comprises a display screen and an operation panel.

4. A high performance semiconductor type combustible gas detector according to claim 3, wherein: the detection part is arranged at one end of the shell, the shell of the detection part is matched with the detection part and is of a disc-shaped structure, the other part of the shell is of a square structure, and the display screen and the operation panel are sequentially arranged on the surface of the shell.

5. The high-performance semiconductor type combustible gas detector according to claim 2, wherein: the number of the semiconductor rings is 2-5.