JP2024004494A - Portable gas analysis device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a connector provided on a rear part dustproof or drip-proof without impairing heat dissipation.

SOLUTION: A portable gas analysis device 100 includes an analytical device 2 that analyze gas, a casing 3 that accommodates the analytical device 2, is provided with an operating portion 4 for operating the analytical device 2 on a front portion 3F, and is provided with connectors 5, 6, and 8 for piping, wiring, or power supply of the analytical device 2 on a rear part 3R, and a dust-proof or drip-proof rear cover 10 that faces the rear part 3R of the casing 3 and forms a gap S with the rear part 3R and covers the connectors 5, 6, and 8.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to a portable gas analyzer that is portable.

Conventionally, in a portable gas analyzer as shown in Patent Document 1 or Patent Document 2, in a casing in which an analytical device is housed, an operating section for operating the analytical device is provided on the front side, and an operating section for operating the analytical device is provided on the back side. Some parts are equipped with piping, wiring, or power connectors for analytical equipment.

When using this portable gas analyzer outdoors, it is considered to add a dustproof/dripproof structure to protect it from dust and water droplets. For example, parts of portable gas analyzers that require drip-proofing and dust-proofing (for example, power supply connectors, piping, wiring connectors, etc.) are covered with covers, or portable gas analyzers are housed in boxes. There is.

From the viewpoint of portability, portable gas analyzers often house as many analytical instruments as possible in a small casing, and performance depends on how efficiently the heat inside the casing is discharged to the outside. Important for maintenance.

However, if the portable gas analyzer is covered with a cover or housed in a box, exhaust heat from inside the casing is blocked, making it difficult to stabilize the temperature inside the casing within a range that maintains performance.

Japanese Patent Application Publication No. 2005-3470 Japanese Patent Application Publication No. 2012-189549

The present invention has been made in view of the above-mentioned problems, and its main objective is to make the connector provided on the back surface dustproof or drip-proof without impairing heat dissipation. .

That is, the portable gas analyzer according to the present invention is a portable gas analyzer that is portable, and houses an analytical device for analyzing gas and the analytical device, and the front part contains the analytical device. A casing that is provided with an operation section for operating the equipment and has piping, wiring, or a power supply connector for the analysis equipment on the back part, and a casing that faces the back part of the casing and is located between the back part and the back part. It is characterized by comprising a dust-proof or drip-proof rear cover that forms a gap and covers the connector.

Such a portable gas analyzer is equipped with a dust-proof or drip-proof rear cover that faces the back of the casing and covers the connector, making the connector dust-proof or drip-proof. be able to. Here, since the dust-proof or drip-proof rear cover forms a gap with the back surface, heat is exchanged through the gap, so that heat dissipation in the back surface is not impaired.

Since a gap is formed between the dust-proof or drip-proof rear cover and the back surface, there is a risk that water droplets may enter through the gap. For this reason, it is desirable that a gutter portion for receiving water droplets that enters between the back surface portion and the rear cover is provided on the casing side with respect to the rear cover.

As a specific embodiment of the gutter section, the gutter section includes a horizontal gutter section that extends left and right at the upper part of the back surface section, and a horizontal gutter section that is continuous with the horizontal gutter section and extends vertically on at least one of the left and right sides of the back surface section. It is desirable to have a downpipe section. With this configuration, in the gap between the rear cover and the back surface, since the horizontal gutter section is provided at the upper part of the back surface where water droplets such as rain tend to enter, it is possible to suitably prevent water droplets from entering. Furthermore, since the vertical gutter section is provided continuously to the horizontal gutter section, the water flowing from the horizontal gutter section can flow to the lower part of the casing while preventing the back surface from getting wet.

In order to further prevent the casing, such as the back part, from getting wet due to water flowing from the gutter, the rear cover receives the water flowing through the gutter and drains the water below the lower end of the gutter. It is desirable to have a discharge part. Since the water from the gutter is guided to the lower side of the casing by this discharge part, the height of the water bouncing off the ground or the like can be lowered, making it difficult for the casing to get wet.

One or more protrusions extending to the left and right of the back surface are formed on the outer surface of the rear cover opposite to the casing, and the upward surface of the protrusions is an inclined surface having a downward slope. is desirable. With this configuration, water adhering to the outer surface of the rear cover can easily flow off, and the appearance can be improved. Moreover, the mechanical strength of the rear cover can also be increased.

Some portable gas analyzers have ventilation slits formed in at least one of the left and right side surfaces of the casing. In the case of this configuration, the side cover further includes a dust-proof or drip-proof side cover that covers the ventilation slit, and the side cover covers the upper part of the ventilation slit without any gap and has an opening below the ventilation slit. It is desirable to form a With this configuration, by covering the ventilation slit related to exhaust heat with the minimum portion of the side cover that ensures dustproofness and dripproofness, efficient heat exhaustion and dustproofness or dripproofness can be achieved at the same time.

The operation unit may be a touch panel display. In this configuration, the casing includes a frame member surrounding the touch panel display, and a protective film is provided on the back surface of the frame member so as to close an opening through which the touch panel display is exposed. It is desirable that the

According to the present invention described above, it is possible to make the connector provided on the back surface dust-proof or drip-proof without impairing heat dissipation.

1 is an overall schematic diagram of a portable gas analyzer according to an embodiment of the present invention. FIG. 2 is a rear view schematically showing the portable gas analyzer of the same embodiment. FIG. 3 is a cross-sectional view schematically showing the rear cover of the same embodiment. FIG. 2 is a rear view schematically showing the portable gas analyzer of the same embodiment, excluding the rear cover. FIG. 3 is a cross-sectional view schematically showing a discharge section of the rear cover of the same embodiment. It is a figure which shows typically the side part of the casing of the same embodiment. FIG. 3 is a cross-sectional view schematically showing a casing around the operating section of the same embodiment.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A portable gas analyzer according to an embodiment of the present invention will be described below with reference to the drawings.

The portable gas analyzer 100 of this embodiment can be carried with one hand, for example, and its mass is, for example, 30 kg or less. Moreover, this portable gas analyzer 100 analyzes the concentration of a predetermined component contained in, for example, the atmosphere or exhaust gas such as engine exhaust gas or flue exhaust gas.

<1. Device configuration>
Specifically, as shown in FIG. 1, the portable gas analyzer 100 includes an analytical device 2 for analyzing gas, and a casing 3 that houses the analytical device 2.

The analytical device 2 is capable of simultaneously measuring the concentrations of _NOx , _SO2 , CO, _CO2 , and _O2 in gas, for example. Specifically, the analytical equipment 2 includes an analytical equipment 2a that _uses chemiluminescence ( _CLD ) to measure _NO There are an analytical instrument 2b that uses a type infrared absorption method (NDIR), and an analytical instrument 2c that uses a magnetic force method, a zirconia method, or an electrode method for measuring O ₂ concentration. Note that the components to be measured by the analytical instrument 2 are not limited to those mentioned above, and may be one that measures the concentration of any one component, one that uses other principles, or one that measures the concentration of other components. It may also be a device that measures the concentration of .

The casing 3 has a generally rectangular parallelepiped shape, for example, and accommodates the above-mentioned analytical equipment 2. The front part 3F of this casing 3 is provided with an operation part 4 for operating the analytical equipment 2, and the rear part 3R is provided with connectors 5, 6 for piping, wiring, or power supply of the analytical equipment 2, etc. is provided. The piping connectors 5 include, for example, a connector for a sample gas inlet, a connector for a calibration gas inlet, a connector for other gas inlets, a connector for an exhaust gas outlet, and a connector for a drain water outlet. Furthermore, a handle 3H is provided on the upper surface portion 3T of the casing 3 to facilitate carrying.

The operation unit 4 of this embodiment is a touch panel display, on which operation buttons such as a measurement button and a calibration button are displayed, as well as the concentration of each measurement component. Further, the operating section 4 is provided facing diagonally upward on the front surface 3F of the casing 3, making it easier for the user to operate the operating section 4 and making it easier to visually recognize the displayed content. Note that an input signal from the operation unit 4 is sent to a control unit (not shown), and the control unit controls the analytical device 2, thereby controlling the concentration of the component to be measured in the gas, and controlling the analytical device 2. calibration is performed.

Analytical equipment 2d such as an oxidizing agent, dehumidifier, adsorbent, etc. necessary for measuring the concentration of each component is connected to the connector 5 of the pipe provided on the back surface 3R of the casing 3. Further, a power cable (not shown) from an external power source is connected to the power supply connector 6. In addition, the rear portion 3R is provided with a cooling fan 7 for e.g. electronic cooler heat radiation, a connector 8 for signal transmission (wiring), and a power switch 9 for the portable gas analyzer 100. It is being

As shown in FIGS. 1 to 3, the portable gas analyzer 100 of this embodiment includes a dust-proof or drip-proof rear cover 10 provided on the back surface 3R of the casing 3.

The rear cover 10 covers the connectors 5, 6, 8, exhaust fan 7, and power switch 9 to protect them from dust or water. In addition, the rear cover 10 also protects the casing component fitting portion (for example, the portion where two sheet metals overlap) on the back surface of the casing from dust or drip. The rear cover 10 faces the back surface 3R of the casing 3, and forms a gap S between the rear cover 10 and the back surface 3R. The rear cover 10 of this embodiment covers the connectors 5, 6, 8, the exhaust fan 7, and the power switch 9 all at once by covering substantially the entire back surface 3R (see FIG. 2). Note that a cutout portion 10k is formed at the lower side of the rear cover 10 for taking out a power cable and the like to the outside.

As shown in FIG. 3, this rear cover 10 is attached to the back surface 3R of the casing 3 by a cover frame 11. The rear cover 10 is rotatably attached to the cover frame 11 by, for example, a hinge, and there are two positions: a cover position P where the rear cover 10 faces and covers the back part 3R, and an open position where the rear cover 10 opens the back part 3R. It is configured to be movable between the position Q and the position Q.

Further, on the casing 3 side (inside the rear cover 10) with respect to the rear cover 10, a gutter portion 12 is provided to receive water droplets that enter between the rear surface portion 3R and the rear cover 10. This gutter portion 12 is formed using the cover frame 11.

Specifically, as shown in FIGS. 3 and 4, the gutter section 12 mainly receives water droplets that enter from the gap between the upper part of the rear surface section 3R and the rear cover 10, and extends left and right at the upper side of the rear surface section 3R. It has a horizontal gutter part 121 and a vertical gutter part 122 that is continuous with the horizontal gutter part 121 and extends up and down on the left and right sides of the back surface part 3R. This gutter portion 12 has, for example, a U-shaped cross section.

Further, on the outer surface of the rear cover 10 on the side opposite to the casing 3, one or more protrusions 101 are formed that extend to the left and right of the back surface portion 3R. The upward surface of this protrusion 101 is an inclined surface 101x having a downward slope, and in this embodiment, the vertical cross-sectional shape of the protrusion 101 is approximately triangular.

Furthermore, as shown in FIG. 5, the rear cover 10 has a discharge section 102 that receives water flowing through the gutter section 12 and drains the water below the lower end of the gutter section 12. Specifically, the discharge part 102 is an inclined surface 102x located below the lower end of the gutter part 12 (specifically, the lower end of the downpipe part 122), and the water from the gutter part 12 is discharged from the inclined surface 102x. The gas flows along the lower end of the rear cover 10 and falls onto the installation surface of the portable gas analyzer 100.

Further, in this embodiment, as shown in FIG. 6, a ventilation slit 31 is formed in at least one (in this embodiment, both) of the left and right side parts of the casing 3, and the portable gas analyzer of this embodiment The device 100 further includes a dust-proof or drip-proof side cover 13 that covers the ventilation slit 31.

This side cover 13 covers the upper part and left and right side parts of the ventilation slit 31 without any gaps, and forms an opening 13h below the ventilation slit 31. In this embodiment, a protective cover (not shown) for imparting impact resistance to the casing 3 is provided further outside the side cover 13. This impact-resistant protective cover is open in the front and rear and top and bottom of the left and right side surfaces of the casing 3. In addition, the casing 3 is dust-proof or drip-proof by providing a sealing member or caulking the inside of the casing 3 in areas where water is expected to enter. In addition, some seal members use hard plastic instead of rubber or other packing. When disassembling the casing 3 for maintenance and reassembling it, there is a possibility that waterproofness cannot be maintained with rubber or other packing if it is not in the correct position, but by using hard plastic, waterproofness can be maintained without this worry. .

Furthermore, as shown in FIG. 7, the casing 3 includes a frame member 301 surrounding the touch panel display 4 and a casing body 302. A protective film 14 made of resin is provided on the back surface of the frame member 301 so as to close the opening through which the touch panel display 4 is exposed. This protective film 14 is in close contact with the surface of the touch panel display 4 while the touch panel display 4 is fixed. Then, the frame member 301 is assembled into the casing body 302 by being fixed to a structural member provided inside the casing body 302. Here, a sealing member 15 made of resin such as urethane is provided on the inner surface of the frame member 301 that faces the outer surface of the casing body 302 . With this configuration, the frame member 301 and the seal member 15 can be attached and detached from the outside of the casing body 302, so that maintainability can be improved while maintaining the performance of the seal member 15.

<2. Effects of this embodiment>
According to the portable gas analyzer 100 of the present embodiment configured in this way, a dustproof or waterproof structure is provided so as to cover the connectors 5, 6, 8, the cooling fan 7, and the power switch 9, facing the rear surface 3R of the casing 3. Since the rear cover 10 for dripping is provided, the connectors 5, 6, 8, the cooling fan 7, and the power switch 9 can be made dustproof or dripproof. Here, since the dust-proof or drip-proof rear cover 10 forms a gap S with the back part 3R, heat is exchanged through the gap S, so the heat dissipation in the back part 3R is improved. It won't cause any damage.

Regarding the gutter section 12, in the gap S between the rear cover 10 and the rear surface section 3R, the horizontal gutter section 121 is provided at the upper part of the rear surface section 3R where water droplets such as rain tend to enter, so that the intrusion of water droplets is suitably prevented. be able to. Moreover, since the vertical gutter part 122 is provided continuously to the horizontal gutter part 121, the water flowing from the horizontal gutter part 121 can flow to the lower part of the casing 3 while preventing the back surface part 3R from getting wet.

In addition, since the rear cover 10 has a discharge portion 102 that receives water flowing through the gutter portion 12 and drains the water below the lower end of the gutter portion 12, the water flowing from the gutter portion 12 causes the back surface portion 3R, etc. The casing 3 can be further prevented from getting wet. Since the water from the gutter section 12 is guided to the lower side of the casing 3 by the discharge section 102, the height of the water bouncing off the ground or the like can be lowered, making it difficult for the casing 3 to get wet.

Since one or more protrusions 101 are formed on the outer surface of the rear cover 10, and the upward surface of the protrusions 101 is an inclined surface 101x having a downward slope, water adhering to the outer surface of the rear cover 10 can be easily removed. Appearance can be improved. Moreover, the mechanical strength of the rear cover can also be increased.

<3. Other embodiments>
For example, the gutter section 12 provided on the inner surface of the rear cover 10 has a structure having one horizontal gutter section 121 and two vertical gutter sections 122, but one horizontal gutter section 121 and one end of the one horizontal gutter section 121 The configuration may include one vertical gutter section 122 that is continuous with the vertical gutter section 122 .

Moreover, although the rear cover 10 of the embodiment has a configuration in which the protrusion 101 extends from side to side, it may have a configuration in which the protrusion 101 is not provided. Furthermore, the outer surface of the rear cover 10 may be treated to be water repellent. In order to further improve heat dissipation, it may have protrusions made of a material such as aluminum.

In addition, various modifications and combinations of the embodiments may be made as long as they do not go against the spirit of the present invention.

100... Portable gas analyzer 2... Analysis equipment 3... Casing 3F... Front part 3R... Back part 31... Ventilation slit 301... Frame member 301h... Opening Section 4...Operation section (touch panel display)
5... Piping connector 6... Power supply connector 10... Rear cover S... Gap 101... Convex strip 101x... Upward surface (slanted surface)
102...Discharge part 12...Gutter part 121...Horizontal gutter part 122...Vertical gutter part 13...Side cover 14...Protective film

Claims (7)

A portable gas analyzer that is portable,
Analytical equipment for analyzing gas;
a casing that accommodates the analytical device, has an operating section for operating the analytical device on the front side, and has connectors for piping, wiring, or power supply for the analytical device on the back side;
A portable gas analyzer comprising: a dust-proof or drip-proof rear cover that faces the back surface of the casing, forms a gap with the back surface, and covers the connector. The portable gas analyzer according to claim 1, further comprising a gutter section provided on the casing side with respect to the rear cover to receive water droplets that enter between the back surface section and the rear cover. The gutter section has a horizontal gutter section extending left and right in the upper part of the back surface section, and a vertical gutter section continuous with the horizontal gutter section and extending vertically on at least one of the left and right sides of the back surface section, according to claim 2. Portable gas analyzer. 4. The portable gas analyzer according to claim 2, wherein the rear cover has a discharge section that receives water flowing through the gutter section and drains the water below a lower end of the gutter section. On the outer surface of the rear cover opposite to the casing, one or more protrusions extending from left to right of the back surface are formed;
The portable gas analyzer according to any one of claims 1 to 4, wherein the upward surface of the protrusion is an inclined surface having a downward slope. A ventilation slit is formed in at least one of the left and right side parts of the casing,
further comprising a dust-proof or drip-proof side cover that covers the ventilation slit;
The portable gas analyzer according to any one of claims 1 to 5, wherein the side cover covers the upper part and left and right side parts of the ventilation slit without a gap, and forms an opening below the ventilation slit. Device. The operation unit is a touch panel display,
The casing has a frame member surrounding the touch panel display,
The portable gas analyzer according to any one of claims 1 to 6, wherein a protective film is provided on the back surface of the frame member so as to close an opening through which the touch panel display is exposed.