TWM583926U - Dehumidifier and photoionization detection device with dehumidification function - Google Patents

Abstract

A photoionization detecting device with a dehumidification function includes a photoionization detector and a dehumidifier. The photoionization detector has an air inlet. The dehumidifier includes an outer casing, a dehumidification pipe, and a moisture absorbing material. The outer casing has a content chamber inside, and the outer casing includes an inlet, an outlet, and a drain valve structure. The outlet is connected to the inlet of the photoionization detector, and the drain valve structure is disposed at the lowest position of the outer casing. The dehumidification tube is accommodated in the content chamber, and the dehumidification tube is connected between the inlet and the outlet in the outer casing. The moisture absorbing material is disposed in the content chamber and is located between the dehumidification pipe and the drain valve structure.

Description

Dehumidifier and photoionization detecting device with dehumidification function

The present invention relates to a dehumidification technology applied to a photoionization detector, and more particularly to a dehumidifier and a photoionization detection device having a dehumidification function.

With the development of the industry, various new materials and products have been invented, but incidentally more and more toxic and harmful substances have been produced, and volatile organic compounds are one of them. Therefore, it is necessary to detect volatile organic compounds, such as detecting volatile organic compounds contained in a specific environment to determine the safety level of the environment.

One method known to the creator is to ionize the gas to be measured by a photoionization detector, and then measure the current intensity value generated by the ionized gas to calculate the concentration of volatile organic compounds in the gas to be tested. However, when the moisture content of the gas to be tested is excessive, the sensitivity of the photoionization detector is affected.

In view of this, an embodiment of the present invention provides a photoionization detecting device having a dehumidification function, including a photoionization detector and a dehumidifier. The photoionization detector has an air inlet. The dehumidifier includes an outer casing, a dehumidification pipe, and a moisture absorbing material. Wherein, the outer casing has a content chamber therein, the outer casing includes an inlet, an outlet and a drain valve structure, the outlet is connected to the inlet of the photoionization detector, and the drain valve structure is disposed at the lowest position of the outer casing. The dehumidification tube is accommodated in the content chamber, and the dehumidification tube is connected between the inlet and the outlet in the outer casing. The moisture absorbing material is disposed in the content chamber and is located between the dehumidification pipe and the drain valve structure.

In one or more embodiments, the dehumidifier further includes a container that is received in the content chamber of the outer casing and houses the moisture absorbing material. Further, the container refers to a replaceable cartridge. In addition, the dehumidifier may further include a fixing bracket received in the content chamber of the outer casing and fixedly supporting the container.

In one or more embodiments, the aforementioned container includes a plurality of venting holes or the container is porous.

In one or more embodiments, the outer casing of the dehumidifier includes an upper cover, a lower cover, and a detachable structure, and the detachable structure detachably combines the upper cover and the lower cover. Furthermore, the detachable structure refers to a screw lock structure, an elastic card structure or a male and female snap structure. In addition, the outer casing may further include a sealing gasket sandwiched between the upper cover and the lower cover.

In one or more embodiments, the drain valve structure includes a drain hole, a water stop washer, a metal gasket, and a drain screw that selectively opens or closes the drain hole.

In one or more embodiments, the photoionization detecting device further includes a filter switching unit connected to the outlet of the outer casing and the air inlet of the photoionization detector. between.

In one or more embodiments, the absorbent material is at least one of magnesium chloride, lithium chloride, and sodium citrate.

Another embodiment of the present invention provides a dehumidifier. The dehumidifier includes an outer casing, a dehumidification pipe, and a moisture absorbing material. The outer body of the outer casing has a content chamber, and the outer casing includes an inlet, an outlet and a drain valve structure, and the drain valve structure is disposed at a lowest position of the outer casing. The dehumidification tube is accommodated in the content chamber, and the dehumidification tube is connected between the inlet and the outlet in the outer casing. The moisture absorbing material is disposed in the content chamber and is located between the dehumidification pipe and the drain valve structure.

In one or more embodiments, the dehumidifier further includes a container housed in the content chamber and containing the moisture absorbing material; the container refers to a replaceable cassette container.

In one or more embodiments, the dehumidifier further includes a fixing bracket that is received in the content chamber of the outer casing and fixedly supports the container.

In one or more embodiments, the container includes a plurality of venting holes or the container is porous.

In one or more embodiments, the outer casing includes an upper cover, a lower cover, and a detachable structure, the detachable structure detachably combining the upper cover and the lower cover. Further, the detachable structure refers to a screw lock structure, an elastic insert structure or a male and female snap structure. Additionally, the outer casing may further include a sealing gasket between the upper cover and the lower cover.

In one or more embodiments, the drain valve structure includes a drain hole, a water stop washer, a metal gasket, and a drain screw that selectively opens or closes the drain hole.

In summary, the dehumidifier of the one or more embodiments and the photoionization detecting device having the dehumidifying function can use the dehumidifying tube to release the moisture in the gas sample to the content chamber, and the relative humidity. The reduced gas sample is more suitable for photoionization detection devices for detection of low concentration volatile organic compounds. Further, in one or more embodiments, the dehumidifier may further include a container, and the container may be a replaceable cassette container. Therefore, when the moisture absorbing material in the dehumidifier is not used and needs to be replaced, the user does not need to replace the entire dehumidifier and only needs to replace the container and the moisture absorbing material therein, which is not only convenient but also saves maintenance cost. .

1 is a perspective view of a photoionization detecting device having a dehumidification function according to a first embodiment of the present invention. FIG. 2 is a perspective exploded view of the photoionization detecting device with dehumidification function according to the first embodiment of the present invention. Referring to FIG. 1 to FIG. 2 , in the embodiment, the photoionization detecting device (hereinafter referred to as the photoionization detecting device 1 ) having the dehumidification function includes a photoionization detector (hereinafter referred to as the detector 10 ). And the dehumidifier 20, the dehumidifier 20 is connected to the detector 10. The photoionization detecting device 1 can be applied to detect a volatile organic compound (VOC) or a gaseous sample having a lower concentration. The photoionization detecting device 1 ionizes the gas molecules to be measured by the vacuum ultraviolet rays generated by the inert gas in the vacuum discharge, and then passes the current intensity value generated by measuring the ionized gas to obtain the concentration of the organic compound in the gas to be tested. . As shown in FIGS. 1 and 2, the detector 10 has an air inlet 101 for allowing a gas sample to enter the detector 10 from the dehumidifier 20. Thereby, before the gas sample enters the detector 10, the moisture in the gas sample can be removed through the dehumidifier 20, thereby improving the sensitivity of the detector 10.

Referring to FIG. 1 and FIG. 2 again, in the embodiment, the photoionization detecting device 1 further includes a filter switching unit 30 for connecting the detector 10 and the dehumidifier 20. In the present embodiment, the filter adapter unit 30 is connected between the outlet 213 of the dehumidifier 20 and the intake port 101 of the detector 10. Through the configuration of the filter switching unit 30, the detector 10 can also be combined with other components, which will be described in the following paragraphs. In addition, in some embodiments, the photoionization detecting device 1 may not have the filter switching unit 30; that is, the detector 10 may be directly connected to the dehumidifier 20 to make the detector 10 The intake port 101 is in direct communication with the outlet 213 of the dehumidifier 20.

FIG. 3 is a partial cross-sectional view showing the photoionization detecting device with dehumidification function according to the first embodiment of the present invention. Referring to FIG. 3 together, the foregoing dehumidifier 20 includes an outer casing 21, a dehumidifying pipe 22, and a moisture absorbing material 23. The interior of the outer casing 21 has a content chamber 211 (closed cavity), and the outer casing 21 includes an inlet 212, an outlet 213, and a drain valve structure 24. The outlet 213 is connected to the intake port 101, and the drain valve structure 24 is disposed at the lowest position of the outer casing 21. The dehumidification tube 22 is housed in the content chamber 211, and the dehumidification tube 22 is connected between the inlet 212 and the outlet 213 in the outer casing 21. The moisture absorbing material 23 is accommodated in the content chamber 211 and is located between the dehumidifying tube 22 and the drain valve structure 24.

It should be noted that the dehumidification tube 22 provides a function of allowing moisture to penetrate. Further, the wall of the dehumidification tube 22 is made of a special material having a semi-permeable membrane property for allowing moisture to be released from the dehumidification tube 22, and the substance other than the dehumidification tube 22 is It is not possible to re-enter the tube from the tube wall; however, it should be noted that although the dehumidification tube 22 is used here, it should be understood that it is not limited thereto, and may have the same effect as the dehumidification tube 22 and can be selectively used. An equivalent tube that releases water vapor from the tube. Thereby, when the gas sample with moisture is entered into the dehumidifier 20 from the inlet 212, the moisture in the gas sample can be removed through the dehumidification tube 22, so that the gas sample enters the detector 10 from the outlet 213, and is detected. The device 10 can more accurately detect the concentration of specific organic matter in the gas sample. In general, a gas sample can be pumped from the inlet 212 through the dehumidification tube 22 to the outlet 213 by motor pumping, and the gas sample delivered to the outlet 213 can be adjusted by adjusting parameters such as flow rate, tube diameter, tube length, operating temperature, and the like. Specific relative humidity.

Please refer to FIG. 4, which is a schematic diagram of the use state of the photoionization detecting device with dehumidification function according to the first embodiment of the present invention. As shown in FIG. 3 and FIG. 4, when water vapor is released from the gas sample to the content chamber 211 of the outer casing 21 outside the dehumidification tube 22, it can be absorbed by the moisture absorbing material 23 to be present in the content chamber 211. steam. As shown, in the state of use of the photoionization detecting device 1, the detector 10 is located on one side of the dehumidifier 20, and the moisture absorbing material 23 is located below the dehumidification tube 22. Therefore, the moisture released from the dehumidification pipe 22 drops to the moisture absorbing material 23 in the gravity direction W due to gravity. Moreover, after the dehumidifier 20 is used for a period of time, the moisture absorbing material 23 may not continue to absorb moisture due to the moisture content therein, so that the drainage valve structure 214 located at the lowest position of the outer casing 21 will be deposited on The water in the content chamber 211 is discharged to the dehumidifier 20 along the gravity direction W, thereby increasing the performance and life of the dehumidifier 20.

In one or more embodiments, the dehumidifier 20 further includes a container 25 that is received in the content chamber 211 and houses the absorbent material 23. Thereby, the moisture absorbing material 23 can be positioned through the container 25. Further, in one or more embodiments, the container 25 is referred to as a replaceable cartridge. Therefore, when the moisture absorbing material 23 in the dehumidifier 20 is not used and needs to be replaced, the user does not need to replace the entire dehumidifier 20, but only the container 25 and the replacement of the moisture absorbing material 23 accommodated therein are required. In this way, the operation is not only very convenient but also saves maintenance costs.

In one or more embodiments, the dehumidifier 20 further includes a fixing bracket 26 that is received in the content chamber 211 of the outer casing 21 and fixes the supporting container 25. Thereby, the moisture absorbing material 23 can be housed in the container 25, and the support container 25 can be fixed by the fixing bracket 26. In addition, if a certain volume of water has been stored in the content chamber 211, the fixing bracket 26 may also have the function of isolating the container 25 from the water and liquid, preventing the water from entering the moisture absorbing material 23 again and affecting the moisture absorbing material 23 . The moisture absorption capacity can further increase the use efficiency and life of the dehumidifier 20.

In one or more embodiments, the moisture absorbing material 23 may be magnesium chloride, but not limited thereto; the moisture absorbing material 23 may also be lithium chloride. In some embodiments, the absorbent material 23 can also be sodium citrate. Additionally, in one or more embodiments, the container 25 further includes a plurality of venting holes 251 or the container 25 can be porous. Since the moisture absorbing material 23 can be presented in other forms other than powder, such as granules or flakes, the vent holes 251 have a pore diameter smaller than that of the moisture absorbing material 23. Thereby, when the moisture absorbing material 23 is placed in the container 25, moisture can enter the container 25 from the vent hole 251 and be sucked by the moisture absorbing material 23. Also, since the diameter of the vent hole 251 is smaller than the size of the moisture absorbing material 23, the moisture absorbing material 23 does not escape from the vent hole 251. In the present embodiment, the moisture absorbing material 23 is a block having pores of different sizes and placed in the container 25, but not limited thereto; the moisture absorbing material 23 may also be a dispersed granule/powder.

As shown in FIGS. 1 through 4, in one or more embodiments, the outer casing 21 further includes an upper cover 21a, a lower cover 21b, and a detachable structure. The detachable structure detachably combines the upper cover 21a and the lower cover 21b. In the present embodiment, the inlet 212 and the outlet 213 are located in the upper cover 21a, the drain valve structure 241 is located in the lower cover 21b, and the content chamber 211 is located between the upper cover 21a and the lower cover 21b. That is, the upper cover 21a and the lower cover 21b collectively define the aforementioned content chamber 211. For example, the detachable structure refers to an upper screw lock structure 21d (as shown in the figure, the thread located on the upper cover 21a) and a lower screw lock structure 21e (as shown, the thread of the lower cover 21b), such that The upper cover 21a and the lower cover 21b can be interlocked with each other to increase the adhesion of the outer casing 21. In some embodiments, the detachable structure may also be a resilient card structure or a male and female snap structure. For example, in a case where the detachable structure is an elastic card-locking structure, the upper cover 21a and the lower cover 21b may respectively have an elastic engaging portion and a corresponding engaging portion of the elastic engaging portion, and the elastic engaging portion may be elastically buckled The entrance portions are engaged with each other, and the upper cover 21a and the lower cover 21b can be detachably assembled. On the other hand, in the case that the detachable structure is a male and female fastening structure, the upper cover and the lower cover respectively have positioning grooves of the lugs and the corresponding lugs, and the lugs can be engaged with the positioning grooves, and The upper cover 21a and the lower cover 21b can be detachably assembled. In one or more embodiments, the outer casing 21 may further include a sealing gasket 21c interposed between the upper cover 21a and the lower cover 21b to further improve the adhesion of the outer casing 21. It should be noted that, in the embodiment, the upper cover 21a and the lower cover 21b are combined by a detachable structure, but are not limited thereto; in some embodiments, the upper cover 21a and the lower cover 21b are also The non-removable structures can be combined, for example, by fusion, adhesion, tight fitting, and the like.

In one or more embodiments, the drain valve structure 24 includes a drain hole 241 and a drain screw 242 that selectively opens or closes the drain hole 241. In this embodiment, the front end of the drain screw 242 has an external thread 2421, and the outer screw 2421 is correspondingly locked into the inner screw of the fixing nut 2411 in the drain hole 241, so that the drain hole 241 can be selectively opened or closed. . In one or more embodiments, the drain valve structure 24 further includes a water stop washer 244; when the drain valve structure 24 is in the locked position, the water stop washer 244 is positioned and maintained in a flat surface by the metal washer 243, and is attached to the drain screw When 242 selectively closes the drain hole 241, it is possible to more effectively prevent leakage of water and liquid. Thereby, when it is necessary to discharge the excess water in the content chamber 211 using the drain valve structure 24, the drain screw 242 can be loosened.

As shown in FIG. 1 to FIG. 4 , in one or more embodiments, the photoionization detecting device 1 further includes a filter 40 and a scrubber 50 . The filter 40 and the scrubber 50 are disposed on both sides of the dehumidifier 20, respectively. Specifically, in the present embodiment, the filter 40 is coupled to the upper cover 21a of the outer casing 21 to communicate with the inlet 212. Thereby, the function of automatically cleaning and auto-zeroing of the photoionization detecting device 1 can be provided. On the other hand, the scrubber 50 is connected to the filter transfer unit 30 to communicate with the transfer inlet 301, and the treated toner particles are stored in the scrubber 50 to enter the ionization chamber of the detector 10 in the gas sample. The gas sample was previously scrubbed. In addition, the filter 40 and the scrubber 50 can be connected to the outer casing 21 and the filter adapter unit 30 via a connector fitting.

FIG. 5 is a partial cross-sectional view showing the photoionization detecting device with dehumidification function according to the second embodiment of the present invention. Referring to FIG. 5, in the embodiment, the fixing bracket 26' further includes a plurality of elastic arms 261', and the elastic arms 261' respectively elastically clamp the container 25'. Further, in the present embodiment, the outer wall of the container 25' is provided with a plurality of fitting portions 251', and the fitting portions 251' respectively correspond to the elastic arms 261', and are received by the elastic arms 261'. solid. It should be noted that, in this embodiment, the fitting portion 251' is concave and the protruding portion of the elastic arm 261' is correspondingly engaged, but it should not be limited thereto; the outer wall of the container 25' is embedded. The hinge portion 251' may also be a protruding structure for the elastic arms 261' of the fixing bracket 26' to be correspondingly engaged.

It should be noted that, in the foregoing embodiment, the outer shape of the outer casing 21 is a cylinder, but it should not be limited thereto; the shape of the outer casing 21 may also be other three-dimensional geometric configuration or irregular configuration. .

Please refer to Table 1 and Figure 6, Table 1 is the experimental value of the relative humidity change before and after the dehumidifier 20, and Figure 6 is the experimental result of the relative humidity change before and after the dehumidifier 20 according to the following Table 1. Figure. In this experiment, the flow rate of the gas sample in the dehumidification tube 22 was less than 0.5 liter/min, and the measurement time was 12 hours. It can be seen from the experimental data that the relative humidity of the gas sample measured after the dehumidifier 20 is significantly reduced relative to the relative humidity of the gas sample measured when the dehumidifier 20 is not used, thereby The photoionization detecting device 1 can be made more suitable for measurement of low concentration volatile organic compounds.

[Table 1]  Time (unit: hour)  Relative humidity measured without dehumidifier (unit: relative humidity percentage)  Relative humidity measured under dehumidifier (unit: relative humidity percentage)  0.0  39.2  12.3  1.0  37.8  11.1  2.0  34.9  9.4  3.0  36.6  9.7  4.0  33.9  9.3  5.0  39.4  9.4  6.0  42.9  11.3  7.0  43.5  11.7  8.0  43.9  12.0  9.0  43.6  12.3  10.0  41.2  13.9  11.0  42.2  12.8  12.0  42.1  13.0  

In summary, the dehumidifier of the one or more embodiments and the photoionization detecting device having the dehumidifying function can use the dehumidifying tube to release the moisture in the gas sample to the content chamber, and the relative humidity. The reduced gas sample is more suitable for photoionization detection devices for detection of low concentration volatile organic compounds. Further, in one or more embodiments, the dehumidifier may further include a container, and the container may be a replaceable cassette container. Therefore, when the moisture absorbing material in the dehumidifier is not used and needs to be replaced, the user does not need to replace the entire dehumidifier and only needs to replace the container and the moisture absorbing material therein, which is not only convenient but also saves maintenance cost. .

1‧‧‧Photoionization detection device  10‧‧‧Detector  101‧‧‧air inlet  20‧‧‧Dehumidifier  21‧‧‧Outer casing  211‧‧‧Content Room  212‧‧‧ entrance  213‧‧‧Export  21a‧‧‧上盖  21b‧‧‧Under the cover  21c‧‧‧Sealing washer  21d‧‧‧Upper screw structure  21e‧‧‧low screw structure  22‧‧‧Dehumidification tube  23‧‧‧Hydraulic materials  24‧‧‧Drain valve structure  241‧‧‧Drainage holes  2411‧‧‧ fixing nut  242‧‧‧ drain screw  2421‧‧‧ External thread  243‧‧‧Metal gasket  244‧‧‧ water stop washer  25, 25' ‧ ‧ container  251'‧‧‧Mate  251‧‧‧ venting holes  26, 26'‧‧‧Fixed bracket  261'‧‧‧Flexible arm  W‧‧‧Gravity direction  30‧‧‧Filter adapter unit  301‧‧‧Transfer entrance  40‧‧‧Filter  50‧‧‧ scrubber  

1 is a perspective view of a photoionization detecting device having a dehumidification function according to a first embodiment of the present invention.  FIG. 2 is a perspective exploded view of the photoionization detecting device with dehumidification function according to the first embodiment of the present invention.  FIG. 3 is a partial cross-sectional view showing the photoionization detecting device with dehumidification function according to the first embodiment of the present invention.  FIG. 4 is a schematic view showing the use state of the photoionization detecting device with dehumidification function according to the first embodiment of the present invention.  FIG. 5 is a partial cross-sectional view showing the photoionization detecting device with dehumidification function according to the second embodiment of the present invention.  Fig. 6 is a graph showing experimental results of changes in relative humidity before and after the dehumidifier.  

Claims (19)

A photoionization detecting device with dehumidification function, comprising:
a photo ionization detector having an air inlet; and a dehumidifier comprising an outer casing, a dehumidification tube and a moisture absorbing material;
The outer casing has a content chamber therein, and the outer casing includes an inlet, an outlet, and a drain valve structure, the outlet is connected to the air inlet of the photoionization detector, and the drain valve structure is disposed on the The lowest position of the outer casing;
Wherein the dehumidification tube is accommodated in the content chamber, and the dehumidification tube is connected between the inlet and the outlet;
Wherein, the moisture absorbing material is accommodated in the content chamber and located between the dehumidification pipe and the drain valve structure. The photoionization detecting device with dehumidification function according to claim 1, wherein the dehumidifier further comprises a container, the container is accommodated in the content chamber of the outer casing, and the moisture absorbing material is accommodated. . A photoionization detecting device having a dehumidifying function according to claim 2, wherein the container refers to a replaceable cartridge container. The photoionization detecting device with dehumidification function according to claim 2, wherein the dehumidifier further comprises a fixing bracket, the fixing bracket is accommodated in the content chamber of the outer casing and fixedly supports the container. A photoionization detecting device having a dehumidifying function according to claim 2, wherein the container comprises a plurality of vent holes or the container has porosity. The photoionization detecting device with dehumidification function according to claim 1, wherein the outer casing of the dehumidifier comprises an upper cover, a lower cover and a detachable structure, the detachable structure is provided with the upper cover The lower covers are detachably combined. The photoionization detecting device with dehumidification function according to claim 6, wherein the detachable structure refers to a screw lock structure, an elastic card structure or a male and female snap structure. The photoionization detecting device with dehumidification function according to claim 6, wherein the outer casing further comprises a sealing gasket sandwiched between the upper cover and the lower cover. The photoionization detecting device with dehumidification function according to claim 1, wherein the drain valve structure comprises a drain hole, a water stop washer, a metal gasket, a fixing nut and a drain screw. The water screw selectively opens or closes the drain hole. The photoionization detecting device with dehumidification function according to claim 1, further comprising a filter switching unit connected to the outlet of the outer casing and the photoionization detector Between the air inlets. A photoionization detecting device having a dehumidifying function according to claim 1, wherein the moisture absorbing material is at least one of magnesium chloride, lithium chloride and sodium citrate. A dehumidifier includes:
An outer casing having a content chamber therein, wherein the outer casing includes an inlet, an outlet, and a drain valve structure, the drain valve structure being disposed at a lowest position of the outer casing;
a dehumidification tube is disposed in the content chamber, and the dehumidification tube is connected between the inlet and the outlet in the outer casing; and a moisture absorbing material is received in the content chamber and located in the dehumidification tube The drain valve structure is between. The dehumidifier of claim 12, further comprising a container housed in the content chamber and containing the absorbent material; wherein the container refers to a replaceable cartridge container. The dehumidifier of claim 13, further comprising a fixing bracket, the fixing bracket being received in the content chamber of the outer casing and fixedly supporting the container. A dehumidifier as claimed in claim 13 wherein the container comprises a plurality of venting holes or the container is porous. A dehumidifier as claimed in claim 12, wherein the outer casing comprises an upper cover, a lower cover and a detachable structure, the detachable structure detachably combining the upper cover and the lower cover. The dehumidifier of claim 16, wherein the detachable structure refers to a screw-locking structure, an elastic snap-in structure or a male-female fastening structure. The dehumidifier of claim 16, wherein the outer casing further comprises a sealing gasket between the upper cover and the lower cover. The dehumidifier of claim 12, wherein the drain valve structure comprises a drain hole, a water stop washer, a metal gasket, a fixing nut and a drain screw, the drain screw being selectively opened or closed The drain hole.