GAS SUPPLY AND DISCHARGE ADAPTER AND GAS DETECTION DEVICE

A gas supply and discharge adapter has an opening through which a gas flows into and out of a gas sensor, an inflow port through which the gas flows into the opening, and an outflow port through which the gas flows out of the opening. The inflow port and the outflow port are positioned independently of each other. When the inflow port and the opening are viewed in plan through the gas supply and discharge adapter, the inflow port partially overlaps the opening.

CROSS REFERENCE TO RELATED APPLICATION

This application claims the benefit of Japanese Patent Application No. 2019-157329 filed Aug. 29, 2019, which is hereby incorporated by reference herein in its entirety.

TECHNICAL FIELD

The present disclosure relates to a gas supply and discharge adapter and a gas detection device.

BACKGROUND ART

Sensors, such as odor sensors to detect an odor and gas concentration sensors to detect the concentration of a gas, are hitherto known. For example, when a smell of air needs to be measured, known sensors detect odorous substances contained in the air. Such sensors are hereinafter referred to as “gas sensors”.

When a gas sensor is used to detect a gas, a device is also used to cause the target gas to flow into or out of the gas sensor. Various types of such devices have been proposed. For example, PTL1discloses a gas supply adapter that has an inlet duct for feeding a gas into a chamber and an outlet to vent the gas from the chamber.

CITATION LIST

Patent Literature

SUMMARY OF INVENTION

A gas supply and discharge adapter according to one embodiment has an opening through which a gas flows into and out of a gas sensor, an inflow port through which the gas flows into the opening, and an outflow port through which the gas flows out of the opening. The inflow port and the outflow port are positioned independently of each other. When the inflow port and the opening are viewed in plan through the gas supply and discharge adapter, at least a portion of the inflow port overlaps the opening.

A gas detection device according to one embodiment has a gas sensor that detects a gas supplied to an opening, an inflow port through which the gas flows into the opening, and an outflow port through which the gas flows out of the opening. The inflow port and the outflow port are positioned independently of each other. When the inflow port and the opening are viewed in plan through the gas supply and discharge adapter, at least a portion of the inflow port overlaps the opening.

DESCRIPTION OF EMBODIMENTS

In the present disclosure, the “gas detection device” may be a device for detecting a gas flowing through a channel. In the present disclosure, the phrase “to detect a gas” may mean detecting, for example, a type and/or a concentration of a gas. Moreover, in the present disclosure, the phrase “to detect a gas” may also mean detecting, for example, the presence of a specific gas, a specific odor or smell of a gas, or the presence and/or the amount of a specific component of a gas. In the present disclosure, the gas detection device may be a device that detects a gas using an electrically driven gas sensor. In the present disclosure, various sensors may be used for the “gas sensor”, which will be described later.

In addition, in the present disclosure, the “gas supply and discharge adapter” may be an adapter to be attached to the above gas sensor. In particular, in the present disclosure, a gas can be supplied to the gas sensor through the “gas supply and discharge adapter”. In the present disclosure, the gas can be discharged from the gas sensor through the “gas supply and discharge adapter”. In other words, in the present disclosure, the gas flows into the “gas supply and discharge adapter”, which enables the gas to be supplied to the gas sensor. In addition, in the present disclosure, the gas flows out of the “gas supply and discharge adapter”, which enables the gas to be discharged from the gas sensor.

A better flow of a gas into and out of the gas sensor leads to an improvement in gas detection of the gas sensor. An object of the present disclosure is to provide a gas supply and discharge adapter and a gas detection device that lead to an improvement in gas detection of a gas sensor. According to one embodiment, the gas supply and discharge adapter and the gas detection device that lead to an improvement in gas detection of the gas sensor can be provided. The gas supply and discharge adapter according to one embodiment will be described with reference to the drawings.

FIG. 1is a perspective view illustrating the exterior of the gas supply and discharge adapter.FIG. 2is a front view illustrating the exterior of the gas supply and discharge adapter ofFIG. 1.FIG. 3is a plan view illustrating the exterior of the gas supply and discharge adapter ofFIG. 1.FIG. 4is a bottom view illustrating the exterior of the gas supply and discharge adapter ofFIG. 1.FIGS. 1 to 4illustrate substantially the same gas supply and discharge adapter from different viewpoints.

As illustrated inFIGS. 1 to 4, the exterior of a gas supply and discharge adapter1may appear to be, for example, a cuboid. The exterior of the gas supply and discharge adapter1is not limited to the cuboid but may assume any shape insofar as the gas supply and discharge adapter1can function appropriately. The gas supply and discharge adapter1will be described using an example having a substantially rectangular exterior as illustrated inFIGS. 1 to 4.

In the present disclosure, a surface of the gas supply and discharge adapter1that faces toward the positive side of the Z-axis inFIG. 1may be referred to as the “top surface” for convenience's sake. On the other hand, a surface of the gas supply and discharge adapter1that faces toward the positive and negative side of the Z-axis in FIG.1may be referred to as the “bottom surface” for convenience's sake.

As illustrated inFIGS. 1 to 4, the gas supply and discharge adapter1has an inflow port10, an outflow port20, and an opening30. InFIGS. 1 to 4, the inside structure that is not visible from outside the gas supply and discharge adapter1is indicated by dotted lines. As illustrated inFIGS. 1 to 4, the inflow port10and the outflow port20may be formed at the bottom surface of the gas supply and discharge adapter1. As illustrated inFIGS. 1 to 4, the opening30may be formed at the top surface of the gas supply and discharge adapter1. As illustrated inFIGS. 1 and 2, the inflow port10is formed so as to supply a gas. As illustrated inFIGS. 1 and 2, the outflow port20is formed so as to discharge the gas. As illustrated inFIGS. 1 and 2, the opening30is formed so as to be attached to a gas sensor that detects the gas (which will be described later).

In one embodiment, the gas supply and discharge adapter1may be made of various materials. For example, the gas supply and discharge adapter1may be made of a resin such as fluororesin, a metal such as aluminum or titan, or a material such as ceramics or glass. The gas supply and discharge adapter1defines a channel through which the gas flows, which will be described later. Accordingly, the gas supply and discharge adapter1may be made of a material that is durable against deformation or breakage even when a high-temperature or a low-temperature gas flows therethrough.

As described above, the gas sensor is fitted in the opening30formed at the top surface of the gas supply and discharge adapter1. In one embodiment, the gas sensor fitted in the opening30may be an arbitrary sensor that can detect the gas supplied from the opening30. InFIGS. 1 and 2, an illustrations of the gas sensor fitted in the opening30is omitted. InFIGS. 1 and 2, flows of the gas through the opening30are schematically illustrated with arrows. As illustrated inFIGS. 1 and 2, the gas flows through the opening30between the gas supply and discharge adapter1and the gas sensor.

As described above, the inflow port10is formed so as to supply the gas. In other words, the gas is supplied to the inflow port10formed at the bottom surface of the gas supply and discharge adapter1. A member to be used for supplying the gas may be attached to the inflow port10. For example, a member, such as a hose, a pipe, a tube, or a duct, may be attached to the inflow port10to supply the gas. The member to supply the gas may be any arbitrary member that can supply the gas into the inflow port10. Accordingly, an illustration of the member is omitted. InFIGS. 1 and 2, a flow of the gas through the inflow port10is schematically illustrated with an arrow. As illustrated inFIGS. 1 and 2, the gas is supplied to the gas supply and discharge adapter1through the inflow port10.

As described above, the outflow port20is formed so as to discharge the gas. In other words, the gas is discharged from the outflow port20formed at the bottom surface of the gas supply and discharge adapter1. A member to be used for discharging the gas may be attached to the outflow port20. For example, a member, such as a hose, a pipe, a tube, or a duct, may be attached to the outflow port20to discharge the gas. The member to discharge the gas may be any arbitrary member that can discharge the gas from the outflow port20. Accordingly, an illustration of the member is omitted. InFIGS. 1 and 2, a flow of the gas discharged from the outflow port20is schematically illustrated with an arrow. As illustrated inFIGS. 1 and 2, the gas is discharged from the gas supply and discharge adapter1through the outflow port20.

In one embodiment, when the inflow port10, the outflow port20, and the opening30are formed (bored, for example), the positional relationship and the diameters thereof may be set as follows. As illustrated inFIGS. 3 and 4, the inflow port10and the opening30may be formed (bored, for example) so as to have such diameters and a positional relationship that the inflow port10and the opening30at least partially overlap each other as viewed through the gas supply and discharge adapter1from above the top surface or from below the bottom surface thereof. Similarly, the outflow port20and the opening30may be formed (bored, for example) so as to have such diameters and a positional relationship that the outflow port20and the opening30at least partially overlap each other as viewed through the gas supply and discharge adapter1from above the top surface or from below the bottom surface thereof. On the other hand, the inflow port10and the outflow port20may be formed (bored, for example) so as to have such diameters and a positional relationship that the inflow port10and the outflow port20do not overlap each other as viewed through the gas supply and discharge adapter1from above the top surface or from below the bottom surface thereof. Accordingly, the inflow port10and the outflow port20may be formed independently of each other.

In addition, as illustrated inFIGS. 1 and 2, the opening30may be bored, for example, vertically (in the Z-axis direction) at the top surface of the gas supply and discharge adapter1. The opening30may be bored from the top surface of the gas supply and discharge adapter1in the thickness direction thereof (in the Z-axis direction) without piercing the gas supply and discharge adapter1. For example, as illustrated inFIGS. 1 and 2, the opening30is bored approximately halfway into the gas supply and discharge adapter1from the top surface in the thickness direction (Z-axis direction) thereof.

As illustrateFIGS. 1 and 2, the inflow port10and the outflow port20are bored, for example, vertically (in the Z-axis direction) at the bottom surface of the gas supply and discharge adapter1. The inflow port10and the outflow port20may be bored from the bottom surface of the gas supply and discharge adapter1in the thickness direction thereof (in the Z-axis direction) without piercing the gas supply and discharge adapter1. For example, as illustrated inFIGS. 1 and 2, the inflow port10and the outflow port20are bored approximately halfway into the gas supply and discharge adapter1from the bottom surface in the thickness direction (Z-axis direction) thereof.

When the inflow port10and the opening30are formed (bored, for example) as described above, the inflow port10and the opening30at least partially overlap each other at the connection portion therebetween as illustrated inFIGS. 3 and 4. As illustrated inFIGS. 1 and 2, the inflow port10and the opening30communicate with each other where the inflow port10and the opening30at least partially overlap each other. Similarly, when the outflow port20and the opening30are formed (bored, for example) as described above, the outflow port20and the opening30at least partially overlap each other at the connection portion therebetween as illustrated inFIGS. 3 and 4. As illustrated inFIGS. 1 and 2, the outflow port20and the opening30communicate with each other where the outflow port20and the opening30at least partially overlap each other.

Put another way, as illustrated inFIGS. 1 and 2, when the opening30is viewed from above the top surface of the gas supply and discharge adapter1, the gas supply and discharge adapter1is pierced at the overlapping position between the opening30and the inflow port10. In addition, as illustrated inFIGS. 1 and 2, when the opening30is viewed from above the top surface of the gas supply and discharge adapter1, the gas supply and discharge adapter1is pierced at the overlapping position between the opening30and the outflow port20. On the other hand, as illustrated inFIGS. 1 and 2, when the opening30is viewed from above the top surface of the gas supply and discharge adapter1, a portion of the gas supply and discharge adapter1between the inflow port10and the outflow port20is not pierced. The unpierced portion between the inflow port10and the outflow port20is indicated as a portion A inFIGS. 1 and 2.

FIG. 3is a front view of the gas supply and discharge adapter1as viewed from above the top surface thereof (viewing toward the negative side of the Z-axis). As illustrated inFIG. 3, the portion A, which is the unpierced portion between the inflow port10and the outflow port20, is exposed in the opening30. On the other hand, as illustrated inFIG. 3, the gas supply and discharged adapter1is pierced at positions at which the opening30overlaps the inflow port10and the outflow port20. Accordingly, the gas can flow into and out of the gas sensor through the opening30.

In addition, as illustrated inFIGS. 1 and 2, when the inflow port10and the outflow port20are viewed from below the bottom surface of the gas supply and discharge adapter1, the gas supply and discharge adapter1is pierced at the overlapping positions with the opening30. Accordingly, the gas can flow into the opening30through the inflow port10. The gas can flow out of the opening30through the outflow port20. On the other hand, as illustrated inFIGS. 1 and 2, when the inflow port10and the outflow port20are viewed from below the bottom surface of the gas supply and discharge adapter1, portions of the gas supply and discharge adapter1where the inflow port10and the outflow port20do not overlap the opening30are not pierced. The unpierced portion in the inflow port10, at which the inflow port10does not overlap the opening30, is indicated as a portion B inFIG. 2. In addition, the unpierced portion in the outflow port20, at which the outflow port20does not overlap the opening30, is indicated as a portion C inFIG. 2.

FIG. 4is a bottom view of the gas supply and discharge adapter1as viewed from below the bottom surface thereof (viewing toward the positive side of the Z-axis). As illustrated inFIG. 4, the portion B, which is the unpierced portion at which the inflow port10does not overlap the opening30, is exposed in the inflow port10. Similarly, as illustrated inFIG. 4, the portion C, which is the unpierced portion at which the outflow port20does not overlap the opening30, is exposed in the outflow port20.

In the example illustrated inFIGS. 1 and 2, the connection portion at which the inflow port10and the outflow port20are connected to the opening30is positioned approximately at the middle of the gas supply and discharge adapter1in the thickness direction thereof (in the Z-axis direction). In one embodiment, however, the connection portion at which the inflow port10and the outflow port20are connected to the opening30may be formed at an arbitrary position in the thickness direction (Z-axis direction) of the gas supply and discharge adapter1.

In the above example, it is described that the inflow port10, the outflow port20, and the opening30are bored in the gas supply and discharge adapter1. The inflow port10, the outflow port20, and the opening30, however, may be formed in the gas supply and discharge adapter1using an arbitrary method. For example, the inflow port10, the outflow port20, and the opening30are not bored in the gas supply and discharge adapter1using a drill but may be formed using a mold.

As described above, the gas supply and discharge adapter1may have the inflow port10, the outflow port20, and the opening30. The gas flows into the opening30through the inflow port10. The gas flows out of the opening30through the outflow port20. The gas flows into and out of the gas sensor through the opening30. The inflow port10and the opening30may be formed such that the inflow port10and the opening30at least partially overlap each other at the connection portion therebetween and the gas supply and discharge adapter1is pierced through the overlapping portion. The outflow port20and the opening30may be formed such that the outflow port20and the opening30at least partially overlap each other at the connection portion therebetween and the gas supply and discharge adapter1is also pierced through the overlapping portion.

It may be desired to minimize the supply of a sample gas and/or a purge gas into a gas sensor, such as an odor sensor module or a gas concentration sensor module. It may also be desired to minimize the supply of the sample gas and/or the purge gas, for example, when the size of the module is desired to be reduced. In addition, it is desired to minimize the supply of the sample gas, for example, when the amount of the sample gas is limited. On the other hand, the sensor may be desired to respond quickly even when the supply of the sample gas is small as in the above cases. If the sensor does not respond quickly, the time lag may cause a user, for example, to receive sensing results too late. In addition, in the case where the sensor module that performs waveform analysis is desired to reduce the amount of the gas to be used, the sensor is required to respond to an introduced gas quickly.

In order to reduce the supply of the gas, the following measures may be taken with the gas supply and discharge adapter1. The gas supply and discharge adapter1may be disposed around the portion of the gas sensor that detects the gas, which thereby reduces the volume of a space in which the gas can be diffused compared with the case where the gas sensor is used alone. The gas supply and discharge adapter1according to one embodiment is configured to control the velocity of inflow of the gas by adjusting the area of the pierced portion of the opening30. The gas supply and discharge adapter1thereby enables the gas sensor to respond quickly or slowly. In order to retard the gas sensor's response, for example, the opening30may be made small, which increases the velocity of inflow of the gas and causes the gas sensor to respond quickly. On the other hand, in order to accelerate the gas sensor's response, for example, the opening30may be made large, which decreases the velocity of inflow of the gas and thereby suppresses an abrupt intrusion of the gas into the gas sensor.

In the gas supply and discharge adapter1, as described above, the inflow port10and the outflow port20are formed near the opening30so as to have partial overlaps with the opening30that is connected to the gas sensor. In other words, the inflow port10and the outflow port20are formed so as to overlap the opening30at least partially as viewed in plan through the gas supply and discharge adapter1from above the top surface or from below the bottom surface thereof. When the inflow port10and the opening30are viewed in plan through the gas supply and discharge adapter1, at least a portion of the inflow port10may overlap the opening30. In particular, when the inflow port10and the opening30are viewed in plan through the gas supply and discharge adapter1, a portion of the inflow port10may overlap the opening30. In addition, when the outflow port20and the opening30are viewed in plan through the gas supply and discharge adapter1, at least a portion of the outflow port20may overlap the opening30. In particular, when the outflow port20and the opening30are viewed in plan through the gas supply and discharge adapter1, a portion of the outflow port20may overlap the opening30. In addition, the inflow port10and the outflow port20may be disposed closely, for example, so as to be adjacent to each other. This leads to a reduction in the size of the gas supply and discharge adapter1, which further leads to an reduction in the supply of the sample gas.

In addition, in the gas supply and discharge adapter1, the size (area) of the partially overlapping portion, which is the pierced portion, between the inflow port10and the opening30may be changed appropriately. Moreover, in the example illustrated inFIGS. 1 and 2, reducing the size of the opening30can increase the velocity of the gas flowing into the gas sensor through the opening30. With this configuration, the gas sensor's response can be accelerated due to the velocity increase of the sample gas flowing into the gas sensor through the opening30.

On the other hand, in the example illustrated inFIGS. 1 and 2, increasing the size of the opening30can decrease the velocity of the gas flowing into the gas sensor through the opening30. With this configuration, the gas sensor's response can be retarded due to the velocity decrease of the sample gas flowing into the gas sensor through the opening30. This can suppress an overreaction of the gas sensor, for example, in an early stage of the gas sensor's response.

As described above, the gas supply and discharge adapter1enables the gas to flow favorably into and out of the gas sensor. Thus, a gas supply and discharge adapter that leads to an improvement in gas detection of the gas sensor can be provided in accordance with the gas supply and discharge adapter1.

Next, gas supply and discharge adapters according to other embodiments will be described.

FIG. 5is a front view of a gas supply and discharge adapter according to one embodiment as viewed from above the top surface thereof (viewing toward the negative side of the Z-axis) as is the case forFIG. 3.

As illustrated inFIG. 5, the inflow port10and the opening30may be formed (bored, for example) so as to have such diameters and a positional relationship that the inflow port10entirely overlaps the opening30as viewed through a gas supply and discharge adapter2from above the top surface thereof. As illustrated inFIG. 5, the outflow port20and the opening30may be also formed (bored, for example) so as to have such diameters and a positional relationship that the outflow port20entirely overlaps the opening30as viewed through the gas supply and discharge adapter2from above the top surface thereof. As illustrated inFIG. 5, the inflow port10and the outflow port20may be formed adjacent to each other in the gas supply and discharge adapter2.

With the configuration illustrated inFIG. 5, the gas flowing through the inflow port10and the outflow port20does not tend to be obstructed. Accordingly, the gas supply and discharge adapter2having the configuration illustrated inFIG. 5is especially beneficial in the case where the response of the sensor needs to be expedited by reducing the size of the opening30.

FIG. 6is a front view of a gas supply and discharge adapter according to one embodiment as viewed from above the top surface thereof (viewing toward the negative side of the Z-axis) as are the cases forFIGS. 3 and 5. InFIG. 6, the inside structure that is not visible from outside is indicated by dotted lines.

Accordingly, when the inflow port10and the opening30are viewed in plan through the gas supply and discharge adapter, at least a portion of the inflow port10, or especially the entirety of the inflow port10, may overlap the opening30. In addition, when the outflow port20and the opening30are viewed in plan through the gas supply and discharge adapter, at least a portion of the outflow port20, or especially the entirety of the outflow port20, may overlap the opening30.

As illustrated inFIG. 6, the inflow port10and the opening30may be formed (bored, for example) so as to have such diameters and a positional relationship that the inflow port10and the opening30overlap each other only slightly as viewed through a gas supply and discharge adapter3from above the top surface thereof. In addition, the outflow port20and the opening30may be formed (bored, for example) so as to have such diameters and a positional relationship that the outflow port20and the opening30overlap each other only slightly as viewed through the gas supply and discharge adapter3from above the top surface thereof.

With the configuration illustrated inFIG. 6, the gas flowing through the inflow port10and the outflow port20tends to be obstructed. Accordingly, the gas supply and discharge adapter3having the configuration illustrated inFIG. 6is especially beneficial in the case where the overresponse of the sensor needs to be controlled by increasing the size of the opening30.

In the gas supply and discharge adapter2ofFIG. 5, the sizes of the inflow port10and the outflow port20are set to be smaller than the size of the opening30. In the gas supply and discharge adapter3ofFIG. 6, the sizes of the inflow port10and the outflow port20are also set to be smaller than the size of the opening30. On the other hand, in the gas supply and discharge adapter1ofFIG. 1, the sizes of the inflow port10and the outflow port20are set to be substantially equal to the size of the opening30. Accordingly, in one embodiment, the sizes of the inflow port10and the outflow port20may be set to be equal to, or smaller than, the size of the opening30.

In one embodiment, the inflow port10and the outflow port20may be formed adjacent to each other. In one embodiment, the size of at least one of the inflow port10and the outflow port20may be equal to or smaller than the size of the opening30.

FIG. 7is a front view of a gas supply and discharge adapter according to one embodiment as viewed from above the top surface thereof (viewing toward the negative side of the Z-axis) as is the case forFIG. 1.

As illustrated inFIG. 7, a gas supply and discharge adapter4may have a groove40formed at the unpierced portion A in the opening30between the inflow port10and the outflow port20. The groove40may have an appropriate size so that the gas can flow appropriately from the inflow port10toward the outflow port20. For example, the groove40may have a depth of 0.2 mm in the Z-axis direction. The width in the Y-axis direction of the groove40may be substantially equal to the radius of the inflow port10and/or the outflow port20. The depth of the groove40in the Z-axis direction may be set to be greater or smaller than 0.2 mm depending on the necessity. The width of the groove40in the Y-axis direction may be set to be larger or smaller than the radius of the inflow port10and/or the outflow port20. The groove40, however, may be sized so as to enable the gas to flow appropriately from the inflow port10toward the outflow port20. The shape of the groove40is not limited to that illustrated inFIG. 7. The groove40may be shaped arbitrarily insofar as the gas flows appropriately from the inflow port10toward the outflow port20.

As described above, the gas supply and discharge adapter4may have the groove40formed from the inflow port10to the outflow port20at the connection portion at which the inflow port10and the outflow port20are connected to the opening30. In this case, the groove40may be formed so as to ensure gas communication therebetween.

For example, when the gas sensor is fitted in the opening30of the gas supply and discharge adapter, a filter, such as a filter for removing an unneeded gas, a dust trap filter, or a wire net, may be installed between the gas sensor and the opening30. In the case of the above filter being installed so as to be exposed directly to the inflow port10and the outflow port20, the filter may cause pressure drop. In such a case, the groove40formed as described above may mitigate the pressure drop. In addition, the above groove40may also facilitate the flow of the gas supplied from the opening30to the gas sensor and/or discharged from the gas sensor to the opening30.

FIG. 8is a front view of the gas supply and discharge adapter according to one embodiment as viewed from above the top surface thereof (viewing toward the negative side of the Z-axis) as are the cases forFIGS. 3 and 5.

A gas supply and discharge adapter5illustrated inFIG. 8may have two inflow ports, in other words, an inflow port10aand an inflow port10b.In addition, as illustrated inFIG. 8, the inflow port10a,the inflow port10b,and the opening30may be formed (bored, for example) so as to have such diameters and a positional relationship that the inflow port10aand the inflow port10bentirely overlap the opening30as viewed through the gas supply and discharge adapter5from above the top surface thereof. As illustrated inFIG. 8, the gas supply and discharge adapter5may have one outflow port20. In addition, as illustrated inFIG. 8, the outflow port20and the opening30may be formed (bored, for example) so as to have such diameters and a positional relationship that the outflow port20and the opening30partially overlap each other as viewed through the gas supply and discharge adapter5from above the top surface thereof.

As described above, in one embodiment, a plurality of inflow ports10may be formed. In one embodiment, three or more inflow ports10may be formed. When the inflow ports10and the opening30are viewed in plan through the gas supply and discharge adapter, at least a portion of each inflow port10, or especially the entirety of each inflow port10, may overlap the opening30. In this case, only one outflow port20may be formed. When the outflow port20and the opening30are viewed in plan through the gas supply and discharge adapter, at least a portion of the outflow port20may overlap the opening30. In particular, when the outflow port20and the opening30are viewed in plan through the gas supply and discharge adapter1, a portion of the outflow port20may overlap the opening30.

Next, a gas detection device according to one embodiment will be described.

As illustrated inFIG. 9, a gas detection device100includes the gas supply and discharge adapter1and a gas sensor50. The gas detection device100according to one embodiment may also include a filter60. The gas supply and discharge adapter1may be the same one as described in relation toFIGS. 1 to 4. In one embodiment, any one of the gas supply and discharge adapters2to5described in relation toFIGS. 5 to 8may be adopted here in place of the gas supply and discharge adapter1. Since the gas supply and discharge adapter1and others have already been described, detailed descriptions will be omitted.

The gas sensor50may be an arbitrary gas sensor to be fitted in the gas supply and discharge adapter1or the like. More specifically, the gas sensor50is fitted in the opening30of the gas supply and discharge adapter1or the like. In other words, the gas detection device100may be formed by attaching the gas sensor50to the above-described gas supply and discharge adapter1or the like.

As illustrated inFIG. 9, the gas sensor50may be configured to be appropriately fitted in the opening30. As illustrated inFIG. 9, a sensing portion (or a filter60) of the gas sensor50is desirably disposed, for example, so as to be in contact with (or in proximity with) the portion A as illustrated inFIG. 7in an aim to reduce the supply of the gas. For example, a filter or a mesh or the like is present at an end portion of the gas sensor50that is in contact with the portion A. In this configuration, the filter60or a material (for example, a wire mesh or the like) for protecting the sensing portion of the gas sensor50causes pressure drop. The provision of the groove40, however, can reduce the likelihood of the pressure drop.

As described above, the gas detection device100has the inflow port10, the outflow port20, and the opening30, and also includes the gas sensor50. The gas sensor50detects the gas supplied to the opening30. The gas flows into the opening30through the inflow port10. The gas flows out of the opening30through the outflow port20. In the gas detection device100, the inflow port10, the outflow port20, and the opening30may be formed in the same manner as those described in the gas supply and discharge adapter1or the like.

The present disclosure has been described with reference to the drawings and examples. It should be noted that one skilled in the art can easily make various modifications and alterations on the basis of the present disclosure. Accordingly, such modifications and alterations are to be included in the scope of the present disclosure. For example, functions contained in functional parts may be reallocated insofar as such reallocation does not lead to a logical inconsistency. Multiple functional parts or the like may be combined into one or may be further divided. The above-described embodiments of the present disclosure are not meant to be implemented precisely in accordance with the description but can be implemented while features contained in the embodiments are combined with one another or some features are omitted in an appropriate manner.

REFERENCE SIGNS LIST

1,2,3,4,5gas supply and discharge adapter

100gas detection device