JP2005257588A - Apparatus for measuring volatile matter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a apparatus for measuring volatile matter for performing work, without removing a non-heat resistant member, when removing a volatile matter adhering to the inside of a test tank, after measuring the volatile matter by loading a sample to the test tank. <P>SOLUTION: The test tank 80 is provided in the volatile matter measuring apparatus 1, and gas is supplied to a prescribed member, such as a moisture sensor T4, provided in the test tank 80 from outside and is sprayed to the prescribed member. Then, this part can be cooled when operating at deposit removal temperature. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a volatile matter measuring apparatus which is an apparatus for measuring volatile substances such as volatile organic compounds.

  In recent years, hypersensitivity due to a chemical substance called sick house syndrome has become a problem. One reason for this is that volatile organic compounds (VOC) such as formaldehyde and toluene are used as building materials, and the volatile organic compounds are released into the house.

  For this reason, it is performed to investigate how much volatile organic compounds are contained in building materials and the like. In addition to building materials, volatile organic compounds are also being investigated for materials used in automobile interiors and furniture.

  The volatile matter measuring apparatus capable of measuring such a volatile organic compound puts a sample in a test tank, causes air of a predetermined temperature and humidity to flow into and out of the test tank at a predetermined flow rate, and discharges the sample. This is done by measuring volatile organic compounds contained in the air.

  And the material which does not have a possibility of generation | occurrence | production of a volatile organic compound under test conditions is used for the member which comprises the inside of the test tank of a volatile matter measuring apparatus. Moreover, since it is necessary to perform a test while controlling the temperature, humidity, and the amount of air replacement per hour, an apparatus capable of performing the test while controlling these is used.

  For this reason, the test tank has an inlet capable of introducing a predetermined flow rate of air having a predetermined humidity, and an outlet capable of discharging the air in the test tank. And a detection unit capable of measuring the amount of the volatile organic compound contained in the air exiting from the outlet.

  Different test conditions (temperature, humidity, flow rate) are adopted depending on the intended use. For example, for building materials, the conditions specified in JIS A1901 (temperature 28 ° C., humidity 50%, 0.5 times / h).

There is a possibility that the volatile organic compound may adhere to the surface in the test tank after measuring the volatile organic compound. For this reason, if the next sample is measured without removing it, the volatile organic compounds generated from the previously measured sample and remaining on the surface in the test tank will volatilize again during the next test, and More volatile organic compounds than the above value would be detected, which could cause errors.
Since the absolute amount of volatile organic compounds is small and the rate of mixing into the air exhausted from the exhaust port is small, even if such an amount adhering to the surface in the test chamber is mixed, a large error will occur. End up. When the amount of the volatile organic compound in the sample to be tested first is large and the amount of the volatile organic compound in the sample to be tested later is small, the error becomes particularly large.

Therefore, in order to remove such deposits of volatile organic compounds, the test tank is forcibly volatilized and discharged at a high temperature. However, the temperature sensor and humidity sensor for controlling the conditions of the test tank, and the seal part provided for sealing in the open / close part of the test tank have low heat resistance, so they are removed each time this volatile organic compound is removed. It was.
However, this removal is troublesome, and if the test chamber is heated to a high temperature without being removed accidentally, the temperature sensor, humidity sensor, and seal portion will be damaged.

  In addition, when the temperature sensor, humidity sensor, and seal are attached after the temperature of the test tank is increased, if the mounting to the test tank is insufficient, the sealing performance of the test tank will be reduced, and this mounting part will be used during measurement. The air in the test chamber was discharged from the test chamber, or air outside the test chamber entered and there was a risk of measurement error.

  In addition, there is a measure to install a damper in the test tank and switch the test tank space between the test and high temperature treatment so that various sensors and other components are not exposed to high temperatures, but the structure becomes complicated and the cost increases End up.

  Then, this invention makes it a subject to provide the volatile matter measuring apparatus with which the removal operation | work of the volatile matter adhering in the test tank after a test is easy.

  The invention described in claim 1 for achieving the above-described object has a test tank, and the test tank has an introduction port for introducing gas into the test tank from the outside, and from the test tank to the outside. A discharge port for discharging gas is provided, and the temperature of the test tank can be operated at the test temperature and the deposit removal temperature higher than the test temperature. The gas is introduced into the test tank from the outside and discharged again for testing. A volatile matter measuring apparatus capable of measuring a volatile matter of a sample in a tank, wherein the introduction port is in the vicinity of a predetermined member, and a position where a gas introduced from the introduction port can be sprayed on the predetermined member The volatile matter measuring device is characterized in that it is possible to reduce the temperature rise of a predetermined member by introducing a gas from the inlet into the test tank during operation at the deposit removal temperature. It is.

  According to the first aspect of the present invention, when operating at the deposit removal temperature, it is possible to blow gas to the predetermined member from the introduction port for introducing gas from the outside into the test tank. The temperature rise can be suppressed, and the operation can be performed at the deposit removal temperature without removing the predetermined member.

  The invention described in claim 2 has a test tank, and the test tank has a test inlet for introducing gas into the test tank from the outside, and a discharge port for discharging gas from the test tank to the outside. It is possible to operate the test tank at the test temperature and the deposit removal temperature higher than the test temperature, introduce gas from the outside into the test tank, discharge it again, and remove the sample volatiles in the test tank. A volatile matter measuring apparatus capable of measurement, further comprising a cooling inlet, the cooling inlet being located in the vicinity of a predetermined member and disposed at a position where the introduced gas can be sprayed onto the predetermined member When operating at the test temperature, external gas can be introduced from the test inlet, and when operating at the deposit removal temperature, external gas can be introduced from the cooling inlet. This is a volatile matter measuring device.

  According to the second aspect of the invention, when operating at the test temperature, the external gas is introduced from the test inlet, so that the gas can be introduced from a position suitable for the test conditions, and the deposits are removed. When operating at temperature, it is possible to blow gas to a predetermined member from the cooling inlet that introduces gas into the test chamber from the outside, so that the temperature rise of the predetermined member can be suppressed and removed. Operation at the deposit removal temperature is possible without this.

  The invention according to claim 3 is provided with an air intake port through which external air can be taken in, and an air treatment device capable of performing a predetermined treatment of the air taken in from the air intake port. The volatile matter measuring device according to claim 2, wherein the air of the device can be supplied to both the test inlet and the cooling inlet.

  According to invention of Claim 3, the air intake port which can take in external air, and the air processing apparatus which can perform the predetermined process of the air taken in from the said air intake port are provided, Since the air of the air treatment device can be supplied to both the test introduction port and the cooling introduction port, a supply circuit to the test introduction port and the cooling introduction port can also be used.

  According to a fourth aspect of the present invention, the shape of the predetermined member is a rod, and the flow of air introduced from the outside in the vicinity of the predetermined member flows in the longitudinal direction of the predetermined member. It is a volatile matter measuring device according to any one of claims 1 to 3 characterized by things.

  According to the invention described in claim 4, since the air introduced from the outside flows in the longitudinal direction of the predetermined member, the temperature rise can be efficiently suppressed.

  The predetermined member may be a temperature sensor or a humidity sensor.

  The invention according to claim 6 is characterized in that the predetermined member is disposed in the cooling cylinder, and the tip of the predetermined member is exposed from the cooling cylinder. Device.

  According to the sixth aspect of the present invention, since the predetermined member is disposed in the cooling cylinder, and the tip of the predetermined member is exposed from the cooling cylinder, the test temperature is obtained when the predetermined member is a sensor. When using the sensor, the tip of the sensor etc. is exposed and the temperature, humidity, etc. can be detected, and when the deposit removal temperature is reached, cooling is performed by flowing air from the cooling cylinder in the longitudinal direction. Can do.

  According to a seventh aspect of the present invention, the test tank includes a main body having an opening / closing door and an opening, and at least one of the opening / closing door and the main body is provided with a seal member, and the opening of the main body is opened when the opening / closing door is closed. Any one of 1 to 6, wherein the opening can be sealed by closely contacting the door and the open / close door via a seal member, and the cooling inlet is provided in the vicinity of the seal member The volatile matter measuring device according to.

  According to the seventh aspect of the present invention, when the opening / closing door is closed, the sealing member is provided in the test tank that can close the opening by bringing the opening of the main body portion and the opening / closing door into close contact with each other via the sealing member. Since the introduction port is provided in the vicinity of the seal member, the operation can be performed at the deposit removal temperature without removing the seal member.

  The invention according to claim 8 is characterized in that when the door is closed, a groove is formed by the door, the seal member, and the main body, and air introduced from the outside flows through the groove. 7. The volatile matter measuring device according to 7.

  According to the eighth aspect of the present invention, when the open / close door is closed, a groove is formed by the open / close door, the seal member, and the main body, and the air introduced from the cooling introduction port flows through the groove. The flow of the generated gas is easy to stabilize, and the temperature rise can be efficiently suppressed.

  A temperature control space capable of conducting heat with the test tank is provided outside the test tank, and external gas is introduced into the temperature control space when operating at the deposit removal temperature in the temperature control space. It is also possible to provide an inlet for cooling that is possible (claims 9 and 10).

  In the invention according to claim 11, a partition plate is provided in the temperature adjustment space, and the partition plate divides the heat conduction space in which the test tank is arranged and the heating / cooling space capable of heating / cooling, The partition plate is provided with an introduction portion and a discharge portion, and can form a series of flow paths that lead from the heating and cooling space to the heating and cooling space again through the discharge portion, the heat conduction space, and the introduction portion. The heating / cooling space is provided with a cooling inlet, and gas can be introduced into the heating / cooling space from the cooling inlet during operation at the deposit removal temperature. Or it is a volatile matter measuring apparatus of 10.

  In the invention described in claim 11, the temperature adjustment space is divided into a heat conduction space and a heating / cooling space by a partition plate, and a series of flow paths are formed by the discharge portion and the introduction portion, thereby controlling the temperature of the test chamber. To do. In the case of such a device, the temperature of the device provided in the heating / cooling space by transferring the heat in the test tank from the heat conduction space to the heating / cooling space during operation at the deposit removal temperature. According to the invention described in claim 11, the gas can be introduced into the heating and cooling space from the cooling inlet, and the cooling gas is blown into the discharge part and the introduction part in the form of an air curtain. For example, high temperature gas can be prevented from entering from the discharge part and the introduction part. And the temperature rise of a heating / cooling space can be prevented, and the damage of the apparatus in a heating / cooling space can be prevented.

  The invention described in claim 12 has a heat conduction space capable of conducting heat between the test tank and a heating / cooling space connected to the heat conduction space by two connecting pipes. Can be formed with a series of flow paths that lead to the heating and cooling space again through one connecting pipe, the heat conduction space, and the other connecting pipe, and the heating and cooling space is provided with a cooling inlet. The volatile matter measuring device according to 9 or 10, wherein the gas can be introduced into the heating and cooling space from the cooling inlet during the operation at the deposit removal temperature.

  According to the twelfth aspect of the present invention, a heat conduction space and a heating / cooling space are provided, and a series of flow paths are formed by a connecting pipe. In the case of such a device, the temperature of the device provided in the heating / cooling space by transferring the heat in the test tank from the heat conduction space to the heating / cooling space during operation at the deposit removal temperature. Although there is a risk of rising, according to the inventions of claims 12 and 13, the gas can be introduced into the heating and cooling space from the cooling inlet and connected by blowing the cooling gas in the form of an air curtain. It is possible to prevent the hot gas from entering from the pipe. And the temperature rise of a heating / cooling space can be prevented, and the damage of the apparatus in a heating / cooling space can be prevented.

  A thirteenth aspect of the present invention is the volatile matter measuring apparatus according to the eleventh or twelfth aspect, wherein the test tank is disposed inside the heat conduction space.

  According to the thirteenth aspect of the present invention, since the test tank is disposed inside the heat conduction space, a large area for conducting heat conduction can be taken, and the efficiency is high.

  According to the volatile matter measuring apparatus of the present invention, it is easy to remove volatile matter adhering to the test tank after the test.

  Hereinafter, specific examples of the present invention will be described. FIG. 1 is a perspective view of a volatile matter measuring apparatus according to an embodiment of the present invention. Drawing 2 is a mimetic diagram showing piping and a member of a volatile matter measuring device in an embodiment of the present invention. FIG. 3 is a front view showing the inside of the chamber in the embodiment of the present invention. FIG. 4 is a perspective view showing a humidity sensor and a cooling pipe in the embodiment of the present invention. FIG. 5 is a cross-sectional view showing a humidity sensor and a cooling pipe in the embodiment of the present invention. FIG. 6 is a partially cutaway perspective view showing the vicinity of the seal cooling member of the inner chamber in the embodiment of the present invention. FIG. 7 is a view showing the vicinity of the seal cooling member of the inner chamber in the embodiment of the present invention, where (a) is a front view and (b) is a side view. FIGS. 8-10 is the modification which changed arrangement | positioning of the test tank and temperature control space in embodiment of this invention.

A volatile matter measuring apparatus 1 according to a first embodiment of the present invention is shown in FIGS. 1 and 2.
The volatile matter measuring apparatus 1 is provided with an inner chamber 10 and an outer chamber 11. The inner chamber 10 and the outer chamber 11 have a rectangular parallelepiped shape, and spaces 10e and 11e are provided therein.

  The inner chamber 10 is provided with a main body portion 10c having a space 10e and an opening 10f connected to the space 10e, and an opening / closing door 10a capable of sealing the opening 10f. Further, the outer chamber 11 is provided with a main body portion 11c having a space 11e and an opening 11f connected to the space 11e, and an opening / closing door 11a capable of sealing the opening 11f.

  The inner chamber 10 is smaller than the outer chamber 11 and is inside the outer chamber 11. As shown in FIG. 1, the open / close doors 10 a and 11 a are provided on the same side, and the open / close door 10 a can be opened by opening the open / close door 11 a of the outer chamber 11.

  A seal member 10b as shown in FIG. 3 is provided between the opening / closing door 10a and the main body 10c in a state where the inner chamber 10 is closed. The seal member 10b is held by the main body portion 10c. When the inner chamber 10 is closed, the opening 10f of the main body portion 10c can be sealed by the open / close door 10a via the seal member 10b. The seal member 10b can be held on the door 10a side. As shown in FIG. 3, the seal member 10 b is provided outside the opening 10 f, and is rectangular when viewed from the opening / closing door 10 a side, and has a slightly curved corner.

  When the door 10a is closed, a gap 10d is formed between the main body 10c and the door 10a as shown in FIG.

  The space 10 e inside the inner chamber 10 becomes the test tank 80, and the space formed inside the space 11 e of the outer chamber 11 and outside the inner chamber 10 becomes the temperature adjustment space 81. The surfaces of the test tank 80 that can conduct heat with the temperature adjustment space 81 are provided on all six surfaces of the inner chamber 10 in the front, rear, left, right, upper, and lower sides.

  The inner chamber 10 is made of stainless steel and can conduct heat between the test tank 80 and the temperature adjustment space 81. The outer chamber 11 has a heat insulating layer (not shown), and has a structure that reduces heat conduction with the outside.

  As shown in FIG. 2, the test tank 80 is provided with a test introduction port 60 for introducing air from the outside, cooling introduction ports 62 and 63, and a discharge port 70 for discharging air to the outside. The temperature adjustment space 81 is provided with an introduction port 65 for introducing air from the outside and a discharge port 75 for discharging air to the outside.

  The test chamber 80 is almost sealed when the inner chamber 10 is closed by the open / close door 10a, and air is introduced from either the test introduction port 60 or the cooling introduction ports 62 and 63, and is discharged from the discharge port 70. Can be made. Further, the temperature adjustment space 81 is almost sealed when the outer chamber 11 is closed by the open / close door 11 a, and air can be introduced from the cooling inlet 65 and discharged from the outlet 75.

  As shown in FIG. 2, the test inlet 60 and the cooling inlets 62, 63, 65 can supply air taken in from the compressed air inlet R <b> 1 and processed by the air treatment device 19 through a pipe. is there. In the present embodiment, the air treatment device 19 is a purifier 21 and a dehumidifier 23, and the air taken in from the compressed air intake port R <b> 1 passes through the electromagnetic valve B <b> 1 and the dehumidifier 23 and is given a predetermined pressure by the regulator 22. The impurities are further removed by the cleaner 21.

And it branches at the tip of the cleaner 21, and one leads to the test inlet 60 through the flow rate controller 20a. The other is further branched, and piping is connected to the solenoid valve B2 and the solenoid valve B3. The solenoid valve B2 side is connected to the cooling inlets 62 and 63 and can be supplied to the test tank 80, and the solenoid valve B3 side is introduced for cooling. It can be connected to the port 65 and supplied to the heating / cooling space 85 of the temperature adjustment space 81.
Further, as will be described later, a cooling cylinder 47 and a seal cooling member 48 are connected to the tip of the electromagnetic valve B2.

  A branch is provided between the flow controller 20a and the test introduction port 60, and the air supplied from the test introduction port 60 is humidified with the humidified air introduced from the branch and has a predetermined humidity. It can be.

  Moreover, the discharge port 70 provided in the test tank 80 is connected to the outside through piping.

  The discharge port 75 provided in the heating / cooling space 85 of the temperature adjustment space 81 is connected to the discharge part H1 via the electromagnetic valve B6.

As shown in FIGS. 2 and 3, the temperature adjustment space 81 is provided with a heat conduction space 84 and a heating / cooling space 85. A partition plate 86 having an introduction portion 86a and a discharge portion 86b is provided between the heat conduction space 84 and the heating / cooling space 85. The heating / cooling space 85 is provided with a blower fan 87, a heater 88, and a cooler 89.
The introduction part 86 a and the discharge part 86 b are open and connect the heat conduction space 84 and the heating and cooling space 85. Then, a series of flow paths can be formed that lead from the heating / cooling space 85 to the heating / cooling space 85 again through the discharge portion 86b, the heat conduction space 84, and the introduction portion 86a.

The blower fan 87 is disposed in the vicinity of the discharge portion 86b. When the blower fan 87 is activated, the air in the heating / cooling space 85 is discharged from the discharge portion 86b to the heat conduction space 84, and the air in the heat conduction space 84 is discharged by this discharge. Can be introduced into the heating / cooling space 85 from the introduction portion 86a.
Moreover, the capability of the heater 88 and the cooler 89 can be adjusted by a control unit (not shown), and heating / cooling is performed before the air that has entered from the introduction unit 86a is discharged from the discharge unit 86b to the heat conduction space 84. Can be made.
The heat conduction space 84 is provided with a temperature sensor T1 that can measure the temperature.

  Further, as shown in FIG. 3, a baking heater 32, a stirring fan 33, a temperature sensor T3, and a humidity sensor T4 are provided in the test tank 80. The baking heater 32 can be heated up to a deposit removal temperature (about 250 to 300 ° C.) that can volatilize and remove the volatile organic compound. By operating the baking heater 32 and the stirring fan 33, the baking heater 32 will be described later. A heating removal step can be performed.

  As shown in FIG. 3, the baking heater 32 and the stirring fan 33 are disposed on the inner side of the inner chamber 10 (the side facing the opening / closing door 10 a). In addition, arrangement | positioning, capability, etc. of the baking heater 32 and the stirring fan 33 are selected by the magnitude | size of the test tank 80, the kind of volatile organic compound, etc.

  The member used for the inner chamber 10 such as the seal member 10b is made of a material that does not cause the generation of a volatile organic compound under the test conditions. As the material specifically used, stainless steel, glass, and Teflon (registered trademark) are used.

  Further, the humidity sensor T4 and the seal member 10b have a structure that can be cooled when the operation is performed at the deposit removal temperature as will be described later. This is because the heat resistance of the humidity sensor T4 and the seal member 10b is low with respect to the deposit removal temperature and is damaged when operated at the deposit removal temperature without cooling. In addition, since the temperature sensor T3 of this embodiment has heat resistance, the structure for cooling is not provided.

  Specifically, as shown in FIGS. 4 and 5, air can be blown to these members in the vicinity of the humidity sensor T4 and the seal member 10b. When removing the substances adhering to the test tank 80, low temperature air can be blown to prevent the temperature sensor T4 and the seal member 10b from rising in temperature.

  The humidity sensor T4 is shown in FIGS. 4 and 5, and the humidity sensor T4 has a rod shape. And the front-end | tip part T4a of humidity sensor T4 is arrange | positioned so that it may become the test tank 80 side which is the inner side of the inner chamber 10. FIG. And humidity sensor T4 can detect the temperature of front-end | tip part T4a, and can output a predetermined signal to the control part which is not shown in figure.

  The humidity sensor T4 is installed in a state where it is placed in the cooling cylinder 47. The cooling cylinder 47 is cylindrical and has an air discharge port 47b provided at the end of the humidity sensor T4 on the tip end portion T4a side and an insertion fixing portion 47d provided at the end opposite to the air discharge port 47b. And an air introduction port 47a provided in a body part near the opposite side to the air discharge port 47b. Further, the cooling pipe 47 is arranged with the through direction of the cylinder in the horizontal direction.

  In addition, a mounting portion 47 c is provided in the vicinity of the air discharge port 47 b side of the cooling cylinder 47. The placement portion 47c is positioned near the center of the cooling cylinder 47 when the humidity sensor T4 is placed.

  When the humidity sensor T4 is inserted into the cooling cylinder 47, the humidity sensor T4 is supported by the mounting portion 47c and the insertion fixing portion 47d, and the insertion fixing portion 47d is blocked by the cable of the humidity sensor T4. Portions communicating with the outside of the cylinder 47 are an air inlet 47a and an air outlet 47b. Therefore, the air that has entered the cooling cylinder 47 from the air inlet 47a is discharged from the air outlet 47b.

The cooling cylinder 47 is disposed so as to pass through the temperature adjustment space 81 from the test tank 80 and reach the outside, the air inlet 47 a is located outside the outer chamber 11, and the air outlet 47 b is located in the test tank 80. ing.
In addition, the temperature sensor T3 is arrange | positioned in the same direction in the position different from the humidity sensor T4, as FIG. 3 shows.

  The air discharge port 47b of the cooling cylinder 47 into which the humidity sensor T4 is inserted serves as the cooling introduction port 62. The air inlet 47a of the cooling cylinder 47 is connected to the electromagnetic valve B2 side.

  Further, the seal cooling member 48 for cooling the seal member 10b is attached to the main body portion 10c of the inner chamber 10, as shown in FIG. The seal cooling member 48 is provided at four locations at the corners of the four corners of the rectangular shape that is the outer side of the portion surrounded by the seal member 10b and is the arrangement shape of the seal member 10b.

  As shown in FIGS. 6 and 7, the seal cooling member 48 has a cylindrical shape, and the vicinity of the tip protrudes to the outside, and the other part is embedded. Each seal cooling member 48 is provided with two blowing portions 48a. As shown in FIGS. 6 and 7, the direction blown from the blowing portion 48a is a direction toward two adjacent sides of the seal member 10b, and the air blown from the blowing portion 48a flows as indicated by an arrow. Thus, the seal member 10b can be cooled.

  The blowing portion 48 a of the seal cooling member 48 becomes the cooling inlet 63. Further, the seal cooling member 48 is connected to the electromagnetic valve B2.

Next, the usage method of the volatile matter measuring apparatus 1 is demonstrated.
First, in order to measure the amount of volatile matter in the sample, the sample is placed in the space 10 e inside the inner chamber 10, that is, in the test tank 80. Then, the open / close door 10a of the inner chamber 10 is closed, and the open / close door 11a of the outer chamber 11 is closed.

  Then, the blower fan 87, the heater 88, and the cooler 89 provided in the heating / cooling space 85 of the temperature adjustment space 81 are operated to control the temperature of the heat conduction space 84 of the temperature adjustment space 81, and the heat Heat conduction is performed between the conduction space 84 and the test tank 80 so that the inside of the test tank 80 is controlled to a predetermined test temperature. Since the temperature control of the test tank 80 is performed in this manner, it is not necessary to put the blower fan 87, the heater 88, and the cooler 89 in the test tank 80, so that impurities generated from these devices are sampled. Measurement accuracy can be increased without being detected by the collection tube of the pump 26.

  This temperature control is performed using a temperature sensor T1 provided in the heat conduction space 84 and a temperature sensor T3 in the test tank 80. In addition, this test temperature is 100 degrees C or less normally.

Further, the electromagnetic valve B1 is opened, and clean air having a predetermined humidity is introduced from the test inlet 60 by a predetermined flow rate. As described above, this is taken in from the air intake port R1, and the humidity is adjusted by drying with the dehumidifier 23 to adjust the inflow of water vapor from the humidifier 24. The purification is performed by the purifier 21.
At this time, the humidity is controlled based on the measured value of the humidity sensor T4. The humidity sensor T4 is in the cooling pipe 47, but the tip end T4a is out of the cooling pipe 47, so that humidity detection is not hindered.

  The pressure of the air supplied to the test introduction port 60 is adjusted by the regulator 22, and the adjusted pressure is higher than the atmospheric pressure, and the air is introduced into the test tank 80 from the test introduction port 60. The

  At this time, the electromagnetic valves B2 and B3 are closed, and the introduction of air into the test tank 80 and the temperature adjustment space 81 is performed only from the test inlet 60. Therefore, the flow rate set by the flow rate regulator 20 a is introduced into the test tank 80.

A volatile organic compound such as formaldehyde generated from the sample is mixed with air in the test tank 80 and discharged from the discharge port 70.
The air discharged from the discharge port 70 is discharged to the outside from the discharge portion H3 via the flow rate regulator 20b. In addition, the sampling pump 26 is operated, and a part of the air discharged from the discharge port 70 is taken into the collection tube to sample the volatile organic compound.

  Measurement of the amount of volatiles in the sample is performed in accordance with predetermined conditions such as test temperature, test humidity, replacement amount of air per hour (air flow rate), test time, and the like.

  When another sample is tested after the test is completed, in order to remove the volatile organic compound adhering in the test tank 80, the inside of the test tank 80 is heated to the adhering substance removal temperature to remove the adhering matter. Perform removal.

Specifically, the baking heater 32 and the stirring fan 33 are operated. If it does so, the inside of the test tank 80 will be in a high temperature state (about 250-300 degreeC), and the volatile organic compound adhering in the test tank 80 will volatilize reliably.
At this time, the blower fan 87, the heater 88, and the cooler 89 in the temperature adjustment space 81 are stopped.

Further, the electromagnetic valves B1, B2, B3, B6 are opened. Then, the air cleaned in the test tank 80 or the temperature adjustment space 81 is taken in from the air inlet R1 from the test inlet 60 and the cooling inlets 62, 63, 65, and discharged from the discharge part H2. Can do.
Note that the air introduced from the test inlet 60 and the cooling inlets 62, 63, 65 is all supplied from the same place, taken in from the compressed air intake R1, and electromagnetic valves B1, Air that has passed through the dehumidifier 23, reduced in pressure to a predetermined pressure by the regulator 22, and impurities removed by the purifier 21.

As shown in FIG. 4, the blowing direction of air from the cooling inlet 62 (the air outlet 47b of the cooling pipe 47) is the longitudinal direction of the humidity sensor T4, and the air intake opening around the humidity sensor T4. Low-temperature air taken in from R1 and flowing near normal temperature will flow. Therefore, even if the inside of the test tank 80 becomes high temperature, the temperature rise of the humidity sensor T4 can be suppressed.
Further, the tip portion T4a of the humidity sensor T4 is exposed from the cooling pipe 47, but the air blown out from the cooling introduction port 62 keeps in contact with the jet from the cooling introduction port 62. Can also be suppressed.

Further, as shown in FIG. 6 and FIG. 7, the low temperature air around the normal temperature taken in from the air inlet R1 from the cooling inlet 63 (the blowing portion 48a of the seal cooling member 48) is the seal member 10b. Is sprayed on. And since this air flow flows along the seal member 10b, the temperature rise can be reduced more efficiently.
In the present embodiment, there is a gap 10d between the main body portion 10c and the open / close door 10a, and a substantially “U” -shaped groove is formed by the main body portion 10c, the open / close door 10a, and the seal member 10b. Since the air flow taken in from the air intake port R1 ejected from the introduction port 63 is not easily disturbed by the external flow, it is easy to suppress the temperature rise.

  The volatile organic compound adhering to the test tank 80 is mixed with the air that has entered the test tank 80 from the test inlet 60 and the cooling inlets 62 and 63, and is discharged from the discharge port 70.

  The temperature adjustment space 81 is introduced with air having a low temperature around room temperature taken from the cooling inlet 65 through the air inlet R1, passes through the temperature adjustment space 81, and is discharged from the discharge portion H1. . Therefore, the temperature rise in the temperature adjustment space 81 can be suppressed, and in particular, the temperature rise of the cooler 89 having low heat resistance can be prevented. Moreover, this air can be made into an air curtain shape by the introduction part 86a and the discharge part 86b, and a temperature rise can be suppressed efficiently.

Further, the arrangement and structure of the test tank 80 and the temperature adjustment space 81 (the heat conduction space 84 and the heating / cooling space 85) are not limited to those described above, and the structures shown in FIGS. Can be adopted.
The volatile matter measuring devices 2, 3, and 4 shown in FIGS. 8 to 10 include a blower fan 87, a heater 88, and a cooler 89 in the heating / cooling space 85, as in the volatile matter measuring device 1. In addition, although the cooling inlet 85 and the outlet 75 are provided in the heating / cooling space 85, the illustration is omitted.

As shown in FIG. 8, the test tank 80 and the temperature adjustment space 81 are arranged next to each other, and a heat conduction space 84 is disposed between the test tank 80 and the heating / cooling space 85 to insulate the whole. The volatile matter measuring device 2 in which the material 90 is arranged can be used.
A boundary plate 91 is provided between the test tank 80 and the heat conduction space 84, and a partition plate 86 having an introduction portion 86 a and a discharge portion 86 b is provided between the heat conduction space 84 and the heating / cooling space 85. ing. As the boundary plate 91, a plate made of stainless steel or the like having excellent thermal conductivity is used.

  Similarly to the volatile matter measuring device described above, the volatile matter measuring device 2 passes through the discharge portion 86b, the heat conduction space 84, and the introduction portion 86a from the heating / cooling space 85, and reaches the heating / cooling space 85 again. It has the flow path.

When using the volatile matter measuring device 2, the gas heated and cooled in the heating / cooling space 85 moves to the heat conduction space 84 and conducts heat between the test tank 80 and the heat conduction space 84, The temperature in the test tank 80 can be adjusted.
In the operation at the deposit removal temperature, gas can be introduced into the heating / cooling space 85 from the cooling inlet 65 to reduce the temperature rise in the heating / cooling space 85.

  Furthermore, in the volatile matter measuring device 2, the boundary plate 91 is a single surface. However, like the volatile matter measuring device 3 shown in FIG. 9, the boundary plate 91 provided between the test tank 80 and the heat conduction space 84 is provided. , A bottom surface 91a, a right side surface 91b, and a back side surface 91c.

Thus, as long as the heat conduction between the test tank 80 and the heat conduction space 84 of the temperature adjustment space 81 can be conducted, what is the arrangement of the portion capable of conducting heat in the test tank 80, such as the boundary plate 91, etc. It may be a place.
In addition, from the viewpoint of preventing variation in the temperature distribution in the test tank 80, it is desirable that the portions capable of conducting heat be provided on both sides of the test tank 80 in a balanced manner, and the amount of heat per hour entering and leaving the test tank 80. The larger the area, the better.

Further, like the volatile matter measuring device 4 shown in FIG. 10, the heating / cooling space 85 and the heat conduction space 84 of the temperature adjustment space 81 are arranged in different places and connected by connecting pipes 92 and 93. Can be used.
In the volatile matter measuring device 4, a first tank 67 and a second tank 68 are provided, and the first tank 67 and the second tank 68 are connected by two connecting pipes 92 and 93. A test tank 80 is provided inside the first tank 67 and has a double structure.

  Inside the first tank 67 and outside the test tank 80 is a heat conduction space 84, and inside the second tank 68 is a heating and cooling space 85. Then, the heat conduction space 84 and the heating / cooling space 85 are connected by two connecting pipes 92 and 93, and again from the heating / cooling space 85 through one connecting pipe 92, the heat conducting space 84, and the other connecting pipe 93. A series of flow paths connected to the heating / cooling space 85 is formed.

When using the volatile matter measuring device 4, the gas heated / cooled in the heating / cooling space 85 moves from one of the connection pipes 92 to the heat conduction space 84, and the test tank 80 and the heat conduction space 84. The temperature in the test tank 80 can be adjusted by conducting heat between them.
In the operation at the deposit removal temperature, gas can be introduced into the heating / cooling space 85 from the cooling inlet 65 to reduce the temperature rise in the heating / cooling space 85.

  Although air is used as the gas used in the above embodiment, other gases such as nitrogen gas may be used.

  In the embodiment described above, the cooling inlets 62 and 63 are provided in the vicinity of the humidity sensor T4 and the seal member 10b, but may be provided in the vicinity of other members. For example, the seal member of the outer chamber 11 can also have the same structure as the seal member 10b of the inner chamber 10.

It is a perspective view of the volatile matter measuring apparatus in the embodiment of the present invention. It is the schematic diagram which showed the piping and member of the volatile matter measuring apparatus in embodiment of this invention. It is the front view which showed the inside of the chamber in embodiment of this invention. It is the perspective view which showed the humidity sensor and cooling tube in embodiment of this invention. It is sectional drawing which showed the humidity sensor and the cooling pipe in embodiment of this invention. It is a partially cutaway perspective view showing the vicinity of the seal cooling member of the inner chamber in the embodiment of the present invention. It is the figure which showed the seal cooling member vicinity of the inner chamber in embodiment of this invention, (a) is a front view, (b) is a side view. It is the modification which changed arrangement | positioning of the test tank and temperature control space in embodiment of this invention. It is the modification which changed arrangement | positioning of the test tank and temperature control space in embodiment of this invention. It is the modification which changed arrangement | positioning of the test tank and temperature control space in embodiment of this invention.

Explanation of symbols

1, 2, 3, 4 Volatile matter measuring device 10 Inner chamber 10a Opening / closing door 10b Seal member 10c Main body portion 10d Gap 10f Opening 19 Air treatment device 47 Cooling cylinder 47b Air discharge port 48 Seal cooling member 48a Outlet portion 60 Test introduction port 62, 63, 65 Cooling introduction port 70 Discharge port 80 Test tank 81 Temperature adjustment space 84 Heat conduction space 85 Heating / cooling space 86 Partition plate 86a Introduction part 86b Discharge part R1 Air intake T3 Temperature sensor T4 Humidity sensor T4a Tip Part

Claims (13)

The test tank has an introduction port for introducing gas into the test tank from the outside and an exhaust port for discharging gas from the test tank to the outside. The temperature of the test tank is set to the test temperature. And a deposit removing temperature higher than the test temperature, a volatile matter measuring apparatus capable of measuring the sample volatiles in the test tank by introducing gas into the test tank from the outside and discharging it again.
The introduction port is located in the vicinity of a predetermined member and is disposed at a position where the gas introduced from the introduction port can be sprayed onto the predetermined member, and from the introduction port during operation at the deposit removal temperature. A volatile matter measuring apparatus characterized by being capable of reducing a temperature rise of a predetermined member by introducing gas into a test tank. The test tank has a test inlet for introducing gas into the test tank from the outside, and a discharge port for discharging gas from the test tank to the outside. It is a volatile matter measuring device that can be operated at the test temperature and the deposit removal temperature higher than the test temperature, and can measure the volatile matter of the sample in the test tank by introducing gas into the test tank from the outside and discharging it again. And
Further, a cooling inlet is provided, and the cooling inlet is disposed in the vicinity of the predetermined member at a position where the introduced gas can be sprayed onto the predetermined member, and when operating at the test temperature. The volatile matter measuring apparatus is characterized in that external gas can be introduced from the test inlet and external gas can be introduced from the cooling inlet when operating at the deposit removal temperature. An air intake port through which external air can be taken in, and an air treatment device capable of performing a predetermined treatment of the air taken in from the air intake port are provided, and the air from the air treatment device is introduced into the test inlet and The volatile matter measuring device according to claim 2, wherein the volatile matter measuring device can be supplied to both of the cooling inlets. The shape of the predetermined member is rod-shaped, and the flow of air introduced from the outside in the vicinity of the predetermined member flows in the longitudinal direction of the predetermined member. The volatile matter measuring device according to any one of the above. The volatile matter measuring apparatus according to claim 4, wherein the predetermined member is a temperature sensor or a humidity sensor. 6. The volatile matter measuring apparatus according to claim 4, wherein the predetermined member is disposed in the cooling cylinder, and a tip of the predetermined member is exposed from the cooling cylinder. The test tank is composed of a main body having an opening / closing door and an opening, and at least one of the opening / closing door and the main body is provided with a seal member, and when the opening / closing door is closed, a seal member is provided between the opening of the main body and the opening / closing door. The volatile matter measuring device according to any one of claims 1 to 6, wherein the opening can be sealed by close contact with each other, and the cooling inlet is provided in the vicinity of the seal member. The volatile matter according to claim 7, wherein when the open / close door is closed, a groove is formed by the open / close door, the seal member, and the main body, and the air introduced from the cooling introduction port flows through the groove. measuring device. A temperature adjustment space capable of conducting heat with the test vessel is provided outside the test vessel, and a cooling inlet is provided in the temperature adjustment space. When operating at the deposit removal temperature, The volatile matter measuring apparatus according to any one of 1 to 8, wherein an external gas can be introduced from the cooling inlet into the temperature adjustment space. The test tank has an introduction port for introducing gas into the test tank from the outside and an exhaust port for discharging gas from the test tank to the outside. The temperature of the test tank is set to the test temperature. And a deposit removing temperature higher than the test temperature, a volatile matter measuring apparatus capable of measuring the sample volatiles in the test tank by introducing gas into the test tank from the outside and discharging it again.
A temperature adjustment space capable of conducting heat with the test vessel is provided outside the test vessel, and a cooling inlet is provided in the temperature adjustment space. When operating at the deposit removal temperature, A volatile matter measuring apparatus characterized in that an external gas can be introduced from a cooling inlet into a temperature control space. A partition plate is provided in the temperature adjustment space, and the partition plate divides into a heat conduction space in which a test tank is arranged and a heating / cooling space capable of heating / cooling. A series of flow paths that lead from the heating / cooling space to the heating / cooling space through the discharge part, the heat conduction space, and the introduction part can be formed. The volatile matter measuring device according to claim 9 or 10, wherein an introduction port is provided, and gas can be introduced into the heating and cooling space from the cooling introduction port during operation at the deposit removal temperature. . The temperature adjustment space is composed of a heat conduction space capable of conducting heat with the test chamber, and a heating / cooling space connected to the heat conduction space by two connecting pipes. A series of flow paths that can be connected to the heating / cooling space again through the pipe, the heat conduction space, and the other connecting pipe can be formed, and the heating / cooling space is provided with a cooling inlet. The volatile matter measuring device according to 9 or 10, wherein a gas can be introduced into the heating and cooling space from the cooling inlet during the operation at the kimono removal temperature. The volatile matter measuring apparatus according to claim 11 or 12, wherein the test tank is disposed inside the heat conduction space.

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