Detection device and electronic device

Abstract

To prevent wrong operations of sensors of a detector having a plurality of sensors and reduce the size of the detector.SOLUTION: A detector (110) includes: an inner cover (130) having an entrance port (131) and an exit port (132); a plate-like member (140) located in the inner cover, the member having a first ventilation hole (141) and a second ventilation hole (142); a first sensor (S1) provided in a position of the front surface of the plate-like member and being closer to the exit port than to the first ventilation hole; and a second sensor (S2) provided between the first ventilation hole and the second ventilation hole in the back surface of the plate-like member.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a detection device and an electronic device. [Background technology]

[0002] Particle detection sensors for detecting PM2.5 and the like have been developed. Patent Document 1 discloses a gas detection device equipped with a gas detection module and a particulate detection module. Patent Document 2 discloses a particle detection sensor that suppresses air turbulence in the detection area.

[0003] When creating a multi-sensor unit that incorporates a gas sensor (such as a VOC sensor) and a temperature and humidity sensor in addition to a particle detection sensor as a detection device, the gas sensor and temperature and humidity sensor must be mounted in the flow path of the air that the particle detection sensor is to detect in order to obtain information on the gas concentration and temperature and humidity contained in the air outside the detection device. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2019-215315 [Patent Document 2] Japanese Patent Application Publication No. 2017-181153 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the airflow inside the detection device contains aerosols such as PM2.5 and dust, which can cause dust to accumulate on the surfaces of each sensor, resulting in malfunction.In addition, if a sensor (especially a temperature and humidity sensor) is placed in the air flow path, it will be close to the light-emitting element of the particle detection sensor, and will be affected by the heat generated by the light-emitting element, resulting in malfunction.

[0006] An object of one aspect of the present invention is to prevent malfunction of sensors and achieve miniaturization in a detection device including a plurality of sensors. [Means for solving the problem]

[0007] In order to solve the above problem, a detection device according to one embodiment of the present invention comprises a housing having an intake port and an exhaust port, a plate-shaped member provided within the housing and having a first air vent and a second air vent, a first sensor provided on the surface of the plate-shaped member closer to the intake port than the first air vent, and a second sensor provided on the back surface of the plate-shaped member between the first air vent and the second air vent. [Effects of the Invention]

[0008] According to one aspect of the present invention, in a detection device including a plurality of sensors, malfunction of the sensors can be prevented and miniaturization can be achieved. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is an exploded perspective view of a detection device according to a first embodiment of the present invention. [Figure 2] FIG. 2 is an explanatory diagram of an inner cover according to the first embodiment of the present invention. [Figure 3] FIG. 1 is an explanatory diagram of a plate-shaped member according to a first embodiment of the present invention. [Figure 4] FIG. 3 is a cross-sectional view taken along line AA' in FIG. [Figure 5] FIG. 3 is a cross-sectional view taken along line BB′ in FIG. 2. [Figure 6] FIG. 3 is a cross-sectional view taken along the line CC' in FIG. [Figure 7] FIG. 6 is an explanatory view of a plate-shaped member according to a second embodiment of the present invention. [Figure 8] FIG. 6 is an explanatory view of a plate-shaped member according to a second embodiment of the present invention. [Figure 9] FIG. 10 is an exploded perspective view of a detection device according to a third embodiment of the present invention. [Figure 10] FIG. 5 is a cross-sectional view taken along line AA' corresponding to FIG. 4 according to a third embodiment of the present invention. [Figure 11] FIG. 6 is a cross-sectional view taken along line BB′ corresponding to FIG. 5 according to a third embodiment of the present invention. [Figure 12] FIG. 7 is a cross-sectional view taken along line CC' corresponding to FIG. 6 according to a third embodiment of the present invention. [Figure 13] 10A and 10B are diagrams showing examples of vent holes according to a fourth embodiment of the present invention. [Figure 14] 10A and 10B are diagrams showing examples of vent holes according to a fourth embodiment of the present invention. [Figure 15] 10A and 10B are diagrams showing examples of vent holes according to a fourth embodiment of the present invention. [Figure 16] FIG. 10 is a view showing a partition plate of an inner cover according to a fifth embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0010] [Embodiment 1] Hereinafter, a detailed description will be given of the first embodiment of the present invention. Unless otherwise specified, the long side direction of the detection device is the X direction, the short side direction is the Y direction, and the vertical direction is the Z direction.

[0011] FIG. 1 is an exploded perspective view of a detection device 110 according to this embodiment.

[0012] The detection device 110 is a multi-sensor device that detects the characteristics of gas. Examples of electronic devices that include the detection device 110 include air purifiers and air conditioners.

[0013] As shown in FIG. 1, the detection device 110 includes a housing consisting of a front cover 120, an inner cover 130, and a back cover 160, a plate-shaped member 140, an airflow generating mechanism 150, a first sensor S1, a second sensor S2 (see FIG. 3), and a third sensor S3 (see FIG. 3).

[0014] Front cover 120 is a cover located on the front side, and includes an inlet (air intake port) 121 and an outlet (air exhaust port) 122. Inlet 121 and outlet 122 are provided on the back surface facing plate-like member 140. Inlet 121 is an opening for drawing gas outside detection device 110 into the inside. Outlet 122 is an opening for expelling gas inside detection device 110 to the outside, and has a shape corresponding to the outlet of airflow generating mechanism 150.

[0015] The inner cover 130 is a cover located between the front cover 120 and the back cover 160, and covers the plate-shaped member 140, the first sensor S1, and the airflow generating mechanism 150. The inner cover 130 has an air inlet (intake port) 131 and an air outlet (exhaust port) 132. The air inlet 131 and the air outlet 132 are disposed at positions corresponding to the air inlet 121 and the air outlet 122 of the front cover 120, and are provided on the back surface facing the plate-shaped member 140. The air inlet 131 is an opening for drawing gas outside the detection device 110 into the interior, and the air outlet 132 is an opening for expelling gas inside the detection device 110 to the outside, and they have a shape corresponding to the outer shape of the airflow generating mechanism 150.

[0016] The plate-like member 140 is a base plate on which the first sensor S1 and the like are mounted. The plate-like member 140 may also be a substrate. A substrate is a printed circuit board, which is an insulating plate on which conductive wiring is provided or inside thereof. The first sensor S1 is provided on the surface of the plate-like member 140 closer to the inlet 131 than the first air vent 141.

[0017] Although airflow generating mechanism 150 is shown separated from other components in FIG. 1 for convenience, it is actually integrated with inner cover 130 and generates an airflow from inlet 131 to outlet 132 inside the housing. As a result, airflow generating mechanism 150 exhausts air inside the housing to the outside through outlet 132. Airflow generating mechanism 150 includes a fan, a temperature regulator, a pressure regulator, and the like. Note that airflow generating mechanism 150 does not necessarily have to be built into the housing, and may be attached externally.

[0018] The rear cover 160 is a cover located below the detection device 110. As shown in Fig. 1, the inner cover 130 integrated with the airflow generating mechanism 150 and the rear cover 160 cover the plate-shaped member 140 and the first sensor S1. In detail, the plate-shaped member 140 is supported via screws 170 provided in the rear cover 160, and the inner cover 130 integrated with the airflow generating mechanism 150 covers the plate-shaped member 140.

[0019] Plate-like member 140 is provided with first ventilation holes 141 and second ventilation holes 142. Details will be described later.

[0020] 2 is an explanatory diagram of the inner cover 130 according to this embodiment, which is upside down from FIG. 1. As shown in FIG. 2, the first flow path FP1 is a flow path that passes from the inlet 131 through the first sensor S1 and releases air to the outside by the airflow generating mechanism 150. The first sensor S1 is disposed near the inlet 131.

[0021] 3 is an explanatory diagram of the back surface of the plate-shaped member 140 according to this embodiment. As shown in FIG. 3, the first air vent 141, which is shown as a substantially rectangular shape, is arranged at the upper center with its major axis aligned in the Y direction. The second air vent 142, which is shown as a substantially rectangular shape, is arranged at the center left with its major axis aligned in the X direction. The first air vent 141 and the second air vent 142 are arranged between the first sensor S1 and the outlet 132, and more specifically, are provided downstream of the first sensor S1 and upstream of the airflow generating mechanism 150 in the first flow path FP1 (see FIG. 2). The second air vent 142 is provided below the airflow generating mechanism 150.

[0022] In FIG. 3, both the first ventilation hole 141 and the second ventilation hole 142 are shown to have a substantially rectangular shape, but they may also have a substantially elliptical shape and can be set appropriately.

[0023] The first air vent 141 is provided near the first sensor S1. The second air vent 142 is provided near the air flow generating mechanism 150. As a result, air that has entered the underside of the plate-shaped member 140 from the first air vent 141 flows from the second air vent 142 into the air flow generating mechanism 150 above the plate-shaped member 140 due to the suction force of the air flow generating mechanism 150, and is released from the outlet 122 to the outside of the detection device 110. The second flow path FP2 is a flow path that flows along the underside of the plate-shaped member 140 from the first air vent 141 to the second air vent 142.

[0024] The detection device 110 further includes a second sensor S2 and a third sensor S3.

[0025] The second sensor S2 is disposed on the rear surface of the plate-like member 140, which is the surface opposite to the surface on which the first sensor S1 is disposed. The second sensor S2 is disposed in the second flow path FP2, downstream of the first air hole 141 (between the first air hole 141 and the second air hole 142).

[0026] The third sensor S3 is installed on the back surface of the plate-shaped member 140, which is the surface opposite to the surface on which the first sensor S1 is installed, so as to be adjacent to the second air hole 142. The second air hole 142 is installed near the third sensor S3. In FIG. 3, the third sensor S3 is provided on the upstream side of the second air hole 142 in the second flow path FP2.

[0027] According to the above, the second sensor S2 and the third sensor S3 are provided on the same surface of the plate-shaped member 140 and are disposed between the first air hole 141 and the second air hole 142.

[0028] The first sensor S1 is the first sensor to come into contact with air inside the housing and is located furthest upstream of the three sensors, detecting particles such as dust and PM2.5, for example. The second sensor S2 and the third sensor S3 may be gas sensors (O2, O3, CO, CO2, NOx, etc.), VOC sensors (volatile organic compound sensors), temperature sensors, humidity sensors, temperature and humidity sensors, air pressure sensors, wind speed sensors, etc. Also, the configuration may include both the second sensor S2 and the third sensor S3, or only one of them. In either case, the first sensor S1, the second sensor S2, and the third sensor S3 may be different sensors, and may be set appropriately.

[0029] In this embodiment, the second sensor S2 and the third sensor S3 are arranged on the same surface, but the first sensor S1 and the third sensor S3 may be arranged on the same surface, and only the second sensor S2 may be arranged on a different surface, and this can be set as appropriate.

[0030] Fig. 4 is a cross-sectional view taken along line AA' in Fig. 2. Fig. 5 is a cross-sectional view taken along line BB' in Fig. 2. FIG. 6 is a cross-sectional view taken along line CC' in FIG.

[0031] As shown in Figures 4 to 6, air that enters the inner cover 130 through the inlet 131 (see Figure 1) passes through a first flow path FP1 that flows over the surface of the plate-shaped member 140 and a second flow path FP2 that flows under the back surface of the plate-shaped member 140, and is released to the outside through the outlet 132 by the airflow generating mechanism 150.

[0032] The inner cover 130 includes a partition plate 133 having a third air hole (air vent) 190 between the outlet 132 and the first sensor S1.

[0033] The first flow path FP1 is a flow path through which air that has passed through the first sensor S1 passes between the inner cover 130 and the surface of the plate-shaped member 140, flows into the airflow generating mechanism 150 through the third air vent (air vent) 190 formed in the partition plate 133, and is then released by the airflow generating mechanism 150 from the outlet 132 to the outside of the detection device 110.

[0034] The second flow path FP2 is a flow path through which a portion of the air passing through the first flow path FP1 flows from the first air vent 141 to the back side of the plate-shaped member 140, passes through that back side, and passes through the second air vent 142 before joining the air passing through the first flow path FP1.

[0035] The third air vent (vent) 190 may be larger than the first air vent 141 and the second air vent 142. In other words, the first air vent 141 and the second air vent 142 may be smaller than the third air vent (vent) 190. This makes it possible to adjust the air flow velocity. That is, if the size of the first air vent 141 and the second air vent 142 is made smaller than the third air vent (vent) 190, the fluid resistance increases, and the flow velocity in the second flow path FP2 becomes slower than that in the first flow path FP1.

[0036] [Effects of the First Embodiment] (1) As described above, measurement by the second sensor S2 and the third sensor S3 is possible without degrading the measurement performance of the first sensor S1, and response performance can be improved. In the detection device 110, the air flow path is divided into a first flow path FP1 and a second flow path FP2, and the flow velocity of the second flow path FP2 is reduced. This prevents dust from accumulating on the surfaces of the second sensor S2 and the third sensor S3, and prevents malfunction of the second sensor S2 and the third sensor S3 due to dust accumulation on the surfaces of the second sensor S2 and the third sensor S3.

[0037] Specifically, by making the hole sizes of the first ventilation hole 141 and the second ventilation hole 142 smaller than the size of the third ventilation hole (vent) 190 of the first flow path FP1, the flow rate of the second flow path FP2 is slowed down, thereby making it possible to suppress the intrusion of dust into the second flow path FP2. Note that, because the second ventilation hole 142 serves as an exhaust port, the hole size may be made as large as possible to the extent that dust does not enter through a reverse flow.

[0038] (2) When the plate-shaped member 140 is a substrate, the second sensor S2 and the third sensor S3 can be easily mounted by using the back surface of the plate-shaped member 140 as the mounting surface for circuit elements of the substrate. Since the substrate of the plate-shaped member 140 is mounted on one side, this leads to reductions in substrate costs and processing costs, leading to lower product costs. This is an effect when the second flow path FP2 is formed of a substrate on the back surface of the plate-shaped member 140.

[0039] (3) By providing the first ventilation hole 141 between the heat-generating element (particularly the light-emitting element of the first sensor S1) and the second and third sensors S2 and S3, it is possible to block heat (thermal conduction) transmitted from the heat-generating element via the substrate. Therefore, it is possible to suppress malfunctions of the second and third sensors S2 and S3 due to the influence of the heat-generating element (heat).

[0040] (4) A branch is created in the flow path of the first sensor S1, and the second sensor S2 and the third sensor S3 are installed on the branch, so that the inlet 131, the outlet 132, and the airflow generating mechanism 150 can be made common, thereby reducing the product size and costs.

[0041] [Embodiment 2] A second embodiment of the present invention will be described below. For ease of explanation, the same reference numerals will be used to designate components having the same functions as those described in the first embodiment, and the description thereof will not be repeated.

[0042] FIG. 7 is an explanatory diagram of a plate-shaped member 240 included in the detection device 210 according to this embodiment. FIG. 7 shows the back surface of the plate-shaped member 240. On the back surface of the plate-shaped member 240, a plurality of second air vents 242a are provided around the third sensor S3. As shown in FIG. 7, the second air vents 242a include, for example, three air vents 242a1, 242a2, and 242a3. The air vent 242a1 is disposed on the Y-direction side of the third sensor S3. The air vent 242a2 is disposed on the opposite side of the third sensor S3 in the X-direction. The air vent 242a3 is disposed on the opposite side of the third sensor S3 in the Y-direction. That is, the three air vents 242a1, 242a2, and 242a3 are disposed in a U-shape around the third sensor S3.

[0043] In addition, when there are three ventilation holes provided in the plate-like member 240, in addition to the aligned U-shape shown in Figure 7, they may be approximately U-shaped (i.e., an arrangement in which at least one of the three ventilation holes 242a1, 242a2, and 242a3 in Figure 7 is shifted in position), or an arrangement in which at least one ventilation hole faces a different direction, etc., can be set as appropriate.

[0044] FIG. 8 is an explanatory diagram of another example of the plate-shaped member 240 included in the detection device 210 according to this embodiment. FIG. 8 shows the back surface of the plate-shaped member 240. As shown in FIG. 8, on the back surface of the plate-shaped member 240, the second air vents 242b are, for example, two air vents 242b1 and 242b2. The air vent 242b1 is arranged in an L-shape on the left center side along the X direction. The air vent 242b2 is arranged in an inverted L-shape on the left center side along the X direction. In other words, the two air vents 242b1 and 242b2 are arranged in a U-shape around the third sensor S3.

[0045] In addition, when there are two ventilation holes provided in the plate-like member 240, in addition to the L-shape and inverted L-shape shown in Figure 8, they may be approximately L-shaped (i.e., an arrangement in which one ventilation hole is removed from the three ventilation holes 242a1, 242a2, and 242a3 in Figure 7), or they may be arranged parallel to each other, or other suitable arrangements may be used.

[0046] [Effects of the Second Embodiment] (1) As described above, the presence of the second ventilation holes 242a, 242b can block or suppress the heat conduction from the heat generating element transmitted through the plate-like member 240, thereby suppressing malfunction and characteristic fluctuation (drift) of the second sensor S2 due to the influence of heat generation.

[0047] (2) The second sensor S2 and the third sensor S3 are not identical but are intended to be sensors with completely different purposes. For example, the second sensor S2 is a gas sensor, and the third sensor S3 is a temperature and humidity sensor. Temperature and humidity sensors are sensitive to fluctuations in the surrounding temperature. Therefore, as shown in FIG. 7, by providing three slits as second ventilation holes 242a in the plate-shaped member 240, it is possible to reduce the influence of heat from other elements and sensors. Furthermore, as shown in FIG. 8, by providing two slits as second ventilation holes 242b in the plate-shaped member 240, it is possible to reduce the influence of heat from other elements and sensors.

[0048] (3) The feature here is that the slits and the ventilation holes are used in common. In other words, by using the slits as ventilation holes, there is no need to provide new slits for heat dissipation.

[0049] [Embodiment 3] A third embodiment of the present invention will be described below. For ease of explanation, the same reference numerals will be used to designate components having the same functions as those described in the first and second embodiments, and the description thereof will not be repeated.

[0050] FIG. 9 is an exploded perspective view of a detection device 310 according to this embodiment. As shown in FIG. 9, the detection device 310 includes a first plate-shaped member 340a and a second plate-shaped member 340b stacked within a housing. The first plate-shaped member 340a is a base plate on which the airflow generating mechanism 350, the first sensor S1, and the like are mounted. The first plate-shaped member 340a includes a first air vent 341a and a second air vent 342a. The second plate-shaped member 340b is provided on the rear surface side of the first plate-shaped member 340a. The second plate-shaped member 340b includes a first air vent 341b and a second air vent 342b. The second plate-shaped member 340b is supported via screws 370 provided within the rear cover 360.

[0051] Fig. 10 is a cross-sectional view taken along line A-A' corresponding to Fig. 4 according to this embodiment. Fig. 11 is a cross-sectional view taken along line B-B' corresponding to Fig. 5 according to this embodiment. Fig. 12 is a cross-sectional view taken along line C-C' corresponding to Fig. 6 according to this embodiment.

[0052] 10 to 12, first plate-shaped member 340a and second plate-shaped member 340b are arranged so as to be in contact with each other. Air entering inner cover 330 through inlets 321 and 331 is divided into a first flow path FP1 that flows over first plate-shaped member 340a and a second flow path FP2 that flows through first air vents 341a and 341b and along the back surface of second plate-shaped member 340b. Air that has passed through first flow path FP1 and second flow path FP2 is discharged from detection device 310 through outlet 332 by airflow generating mechanism 350.

[0053] The second sensor S2 is provided on the surface of the second plate member 340b opposite to the surface facing the first plate member 340a, and between the first air hole 341b and the second air hole 342b.

[0054] [Effects of the Third Embodiment] When the second plate-shaped member 340b is used as the substrate, the first plate-shaped member 340a and the second plate-shaped member 340b are arranged so that they are in contact with each other, so that the first plate-shaped member 340a covers the second plate-shaped member 340b, which is the substrate. This prevents dust from accumulating on the surface of the second plate-shaped member 340b. Furthermore, because the first plate-shaped member 340a covers the second plate-shaped member 340b, maintenance of the second plate-shaped member 340b, which is the substrate, is also easier.

[0055] It should be noted that multiple plate-like members may be stacked, and not only two plate-like members as described above, but also three or more plate-like members may be stacked. In this case, dust can be prevented from accumulating on the plate-like members in each layer except the top layer, in other words, on the plate-like members in the second-highest layer and below, making maintenance easier.

[0056] [Embodiment 4] A fourth embodiment of the present invention will be described below. For ease of explanation, the same reference numerals will be used to designate components having the same functions as those described in the first to third embodiments, and the description thereof will not be repeated. In this embodiment, a modified example of the ventilation hole will be described.

[0057] Fig. 13 is a diagram showing Example 1 of a ventilation hole according to this embodiment. As shown in Fig. 13, ventilation hole 501 according to Example 1 is composed of one hole. Ventilation hole 501 is a representative example of a ventilation hole.

[0058] 14 is a diagram showing Example 2 of a ventilation hole according to this embodiment. As shown in FIG. 14, ventilation hole 502 according to Example 2 is composed of a plurality of micropores 5021. Ventilation hole 502 is a representative example of a ventilation hole. At least one of first ventilation holes 141, 341a, 341b and third ventilation holes 190, 390 may have the same configuration as ventilation hole 502.

[0059] 15 is a diagram showing Example 3 of a vent hole according to the present embodiment. As shown in FIG. 15, vent hole 503 according to Example 3 has filter 5031. Ventilation hole 503 is a representative example of a vent hole. At least one of first vent holes 141, 341a, 341b and third vent holes 190, 390 may have the same configuration as vent hole 503.

[0060] It should be noted that Examples 1, 2 and 3 may be used in combination, or each may be used alone.

[0061] According to the second and third embodiments, it is possible to prevent dust from passing through.

[0062] [Embodiment 5] A fifth embodiment of the present invention will be described below. For ease of explanation, the same reference numerals will be used to designate components having the same functions as those described in the first to fourth embodiments, and the description thereof will not be repeated. In this embodiment, a modified example of the partition plate 433 of the inner cover 430 will be described.

[0063] 16 is a diagram showing a partition plate 433 of an inner cover 430 included in a detection device 410 according to this embodiment. As shown in FIG. 16, a third air vent (vent hole) 490 of the partition plate 433 of the inner cover 430 is closer to the center of the partition plate 433 than in the first to third embodiments. An airflow generating mechanism (not shown) is disposed on the plate-shaped member 440 side, but provides the same effect. The third air vent (vent hole) 490 may be located on the plate-shaped member 440 side of the partition plate 433, or may be located near the center of the partition plate 433.

[0064] 〔summary〕 A detection device according to aspect 1 of the present invention comprises a housing having an intake port and an exhaust port, a plate-shaped member provided within the housing and having a first air vent and a second air vent, a first sensor provided on the surface of the plate-shaped member closer to the intake port than the first air vent, and a second sensor provided on the back surface of the plate-shaped member between the first air vent and the second air vent.

[0065] With the above configuration, it is possible to measure gas using the second sensor without degrading the measurement performance of the first sensor, and it is possible to improve response performance. In addition, it is possible to share the air intake and exhaust ports for supplying air to the two sensors, which reduces the product size and costs.

[0066] A detection device according to aspect 2 of the present invention may be configured such that, in the above-mentioned aspect 1, the housing further has a partition plate having a third air vent between the exhaust port and the first sensor, and the third air vent is larger than the first air vent and the second air vent.

[0067] According to the above configuration, the flow rate of the gas can be adjusted. That is, by making the third vent larger than the first and second vents, the flow resistance of the first and second vents, which are smaller than the third vent, is increased, thereby preventing dust from entering the second sensor.

[0068] A detection device according to aspect 3 of the present invention may be configured such that, in aspect 1 or 2 above, the housing further includes an airflow generating mechanism that exhausts air from inside the housing to the outside of the housing through the exhaust port, and the second air vent is provided below the airflow generating mechanism.

[0069] According to the above configuration, the airflow generating mechanism can efficiently exhaust air.

[0070] A fourth aspect of the present invention provides a detection device in any one of the first to third aspects, wherein the plate-like members are stacked in multiple layers.

[0071] According to the above configuration, since multiple plate-shaped members are stacked, dust accumulation on plate-shaped members other than the top layer (layers below the second from the top) can be prevented, making maintenance easy.

[0072] A detection device according to a fifth aspect of the present invention may be configured in the above-mentioned fourth aspect further including a third sensor provided on the same plane as the second sensor, and the second air vent may be positioned near the third sensor.

[0073] According to the above configuration, the second vent hole is disposed near the third sensor, so that gas can be reliably measured by the third sensor.

[0074] A sixth aspect of the present invention relates to the detection device of the fifth aspect, and may be configured such that a plurality of the second vent holes are provided around the third sensor.

[0075] According to the above configuration, a plurality of second vent holes are provided around the third sensor, so that gas measurement by the third sensor can be performed reliably.

[0076] A seventh aspect of the present invention relates to the detection device of the second aspect, and at least one of the first air hole and the third air hole may be formed from a plurality of micropores.

[0077] According to the above configuration, it is possible to prevent dust from passing through.

[0078] A detection device according to an eighth aspect of the present invention is the detection device of the second aspect, wherein at least one of the first air hole and the third air hole may further include a filter.

[0079] According to the above configuration, the passage of dust can be further suppressed.

[0080] An electronic device according to a ninth aspect of the present invention includes the detection device according to any one of the first to eighth aspects.

[0081] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. Furthermore, new technical features can be formed by combining the technical means disclosed in each embodiment. [Explanation of symbols]

[0082] 110, 210, 310, 410 Detection device 120 Front cover (housing) 121, 131 Inlet (intake) 122, 132 Outlet (exhaust port) 130, 330, 430 Inner cover (housing) 133 Partition 140, 240, 440 Plate-shaped members 340a First plate-shaped member 340b Second plate-shaped member 141, 241, 341a, 341b First ventilation hole 142, 242a1, 242a2, 242a3, 242b1, 242b2, 342a, 342b Second ventilation hole 150 Airflow generation mechanism 160 Back cover 190, 390, 490 3rd vent 501, 502, 503 Ventilation holes 5021 Micropore 5031 Filter

Claims

1. A housing having an intake port and an exhaust port; a plate-like member provided in the housing and having a first ventilation hole and a second ventilation hole; a first sensor provided on the surface of the plate-like member closer to the intake port than the first air vent; a second sensor provided on a rear surface of the plate-like member between the first air vent and the second air vent, the housing further includes a partition plate having a third air hole between the exhaust port and the first sensor, The third vent is larger than the first vent and the second vent. A detection device characterized by:

2. the housing further includes an airflow generating mechanism that exhausts air inside the housing to the outside of the housing through the exhaust port, The second air vent is provided below the airflow generating mechanism.

2. The detection device according to claim 1.

3. The plate-like members are stacked in plurality.

3. The detection device according to claim 1 or 2.

4. Further, a third sensor is provided on the same plane as the second sensor, The second vent is disposed near the third sensor.

4. The detection device according to claim 1, wherein the detection device is a semiconductor laser.

5. The second ventilation holes are provided in plurality around the third sensor.

5. The detection device according to claim 4.

6. At least one of the first ventilation hole and the third ventilation hole is formed from a plurality of micropores.

2. The detection device according to claim 1.

7. At least one of the first ventilation hole and the third ventilation hole further includes a filter.

2. The detection device according to claim 1.

8. An electronic device comprising the detection device according to any one of claims 1 to 7.

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