JP2016001147A - Dew condensation testing device and dew condensation testing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dew condensation testing device that is able to quickly generate a large quantity of dew condensation in a test chamber and is able to reduce difference between the water temperature of a humidifier and the air temperature in the test chamber.SOLUTION: A dew condensation testing device 1 comprises: a test tank 2 including a test chamber 11 where a test piece S is accommodated; an air conditioning unit 3 for adjusting at least the temperature of air inside the test chamber 11; and a dew condensation humidifier 4 arranged inside the test chamber 11 for generating dew condensation on the surface of the test piece S by generating steam inside the test chamber 11. The dew condensation humidifier 4 includes a reservoir unit 21 for reserving water W2 and a heating unit 22 for heating the water W2.

Description

  The present invention relates to a dew condensation test apparatus and a dew condensation test method.

  Conventionally, as a dew condensation test apparatus capable of performing a dew condensation test on a sample, for example, a thermo-hygrostat described in Patent Document 1 is known.

  This apparatus includes a test chamber having a test chamber in which a specimen is accommodated and an air-conditioning passage communicating with the test chamber. A humidifier, a cooling dehumidifier, a heater, and a blower are disposed in the air conditioning passage. The humidifier has a humidifying tray for storing water and an electric heater for heating water.

  When performing a dew condensation test using the above-mentioned constant temperature and humidity chamber, first, steam is generated from a humidifier inside the air conditioning passage, and the steam is introduced into the test chamber to increase the relative humidity in the test chamber. In this state, the temperature of the air in the test chamber is raised with a heater, and the dew condensation test is performed by using the temperature difference between the air and the surface of the specimen to cause condensation on the surface of the specimen.

JP 2014-20777 A

  In the constant temperature and humidity chamber described in Patent Document 1, it may be possible to control condensation by controlling the water temperature of the humidifier. However, in this configuration, the humidifier is housed inside the air conditioning passage, which is a separate space from the test chamber, so even if steam is generated from the humidifier, the steam is introduced into the test chamber from the air conditioning passage. It takes time to be done. For this reason, it becomes difficult to quickly generate condensation on the surface of the specimen in the test chamber. Moreover, since steam is dehumidified inside the air conditioning passage and the amount of water vapor may be reduced, it is difficult to generate a large amount of dew condensation on the surface of the specimen.

  Further, since the humidifier is accommodated in the air conditioning passage which is a space different from the test chamber, a temperature difference between the water temperature of the humidifier in the air conditioning passage and the temperature of the air in the test chamber is likely to occur. Therefore, there is a problem that it is difficult to adjust the temperature of the air in the test chamber by controlling the water temperature.

  The present invention has been made in view of the circumstances as described above, and can rapidly generate a large amount of dew condensation in the test chamber, and the difference between the water temperature of the humidifier and the air temperature in the test chamber can be determined. An object of the present invention is to provide a dew condensation test apparatus that can be made small.

  In order to solve the above problems, the dew condensation test apparatus of the present invention includes a test tank having a test chamber in which a specimen is accommodated, and an air-conditioning unit for adjusting at least the temperature of air inside the test chamber. And a dehumidifying humidifier that is disposed inside the test chamber and generates steam on the surface of the specimen by generating steam inside the test chamber, and the dehumidifying humidifier stores water. It has a storage part and the heating part which heats the said water.

  According to this configuration, since the dehumidifying humidifier is disposed inside the test chamber, the vapor is dehumidified through the air conditioning passage when the vapor is generated by the dehumidifying humidifier. In addition, it is possible to quickly reach the surface of the specimen accommodated in the inside of the test chamber. Therefore, it is possible to quickly generate a large amount of condensation on the surface of the specimen.

  In addition, since the dehumidifying humidifier is arranged inside the test chamber, the heat of the water stored in the storage section of the dehumidifying humidifier is transferred to the air inside the test chamber via the storage section. Easy to be transmitted. Therefore, when condensation occurs, even if there is a difference between the water temperature of the humidifier for condensation and the air temperature in the test chamber, the difference can be reduced. Therefore, it becomes easy to adjust the temperature of the air in the test chamber by controlling the water temperature, and the test accuracy of the dew condensation test can be improved.

  It is preferable that the air-conditioning unit further includes an air-conditioning humidifier that adjusts humidity inside the test chamber.

  According to such a configuration, after the dew condensation is generated on the specimen, when the drying step of adjusting the temperature inside the test chamber by the air conditioning unit to dry the air in the test chamber is performed, the inside of the test chamber is performed by the air conditioning humidifier. It is possible to adjust the humidity.

  The test tank further includes an air conditioning passage communicating with the test chamber, and the air conditioning unit is preferably accommodated in the air conditioning passage.

  According to such a configuration, it is possible to quickly send the air adjusted by the air conditioning unit in the air conditioning passage to the test room.

  It is preferable that the dehumidifying humidifier is detachably attached to an inner wall constituting the test chamber in the test tank.

  According to such a configuration, since the dehumidifying humidifier is detachably attached to the inner wall of the test chamber, the existing constant temperature / humidifier or the constant temperature test chamber and the air conditioner are used as the test tank and the air conditioner. Is possible. Therefore, it is not necessary to prepare an apparatus dedicated to the dew condensation test in which a dehumidifying humidifier is permanently installed in the test chamber only for the dew condensation test, and the dew condensation test can be performed at low cost.

  It is preferable that the dehumidifying humidifier further includes a support that supports the storage unit in a state of being separated from the inner wall of the test chamber.

  According to such a configuration, the support body supports the storage unit apart from the inner wall of the test chamber, so that a gap is formed between the storage unit and the inner wall of the test chamber. Therefore, when the heating unit heats the water inside the storage unit to generate steam and generate condensation, heat conduction from the storage unit to the inner wall of the test chamber can be suppressed by the gap. It is possible to efficiently heat the water inside the reservoir. Furthermore, after the dew condensation is generated, when the air lower than the temperature of the water inside the reservoir passes through this gap, the water inside the reservoir can be quickly cooled.

  It is preferable that the support has a heat sink part that functions as a heat radiating part that contacts the air passing through a gap between the storage part and the inner wall of the test chamber and radiates heat from the storage part to the air.

  According to such a configuration, the support body can contact the air passing through the gap and dissipate heat from the storage portion to the air.

  The dew condensation test method of the present invention is a dew condensation test method using the above dew condensation test apparatus, and generates dew on the surface of the specimen by generating steam inside the test chamber by the dehumidifier humidifier. A dew condensation step; and a drying step of drying the air by adjusting at least the temperature of the air in the test chamber by the air conditioning unit in a state where the dehumidifying humidifier is stopped.

  According to this feature, in the dew condensation process, it is possible to quickly generate a large amount of dew condensation on the surface of the specimen by the dehumidifying humidifier disposed inside the test chamber. Further, in the drying process, it is possible to evaporate the condensation by adjusting the temperature of the air in the test chamber by the air conditioning unit and drying the air. Thereby, it is possible to perform a dew condensation test of a desired cycle by alternately generating and evaporating dew condensation.

  As described above, according to the dew condensation test apparatus of the present invention, a large amount of dew condensation can be quickly generated in the test chamber. In addition, the difference between the water temperature of the humidifier and the air temperature in the test chamber can be reduced.

  According to the dew condensation test method of the present invention, a large amount of dew condensation can be quickly generated on the surface of the specimen. The condensation test of a desired cycle can be performed by alternately generating and evaporating condensation.

It is a figure showing roughly the whole composition of the condensation test device concerning the embodiment of the present invention. It is an expansion perspective view which shows the storage part and support body in the humidifier for condensation of FIG. It is a graph which shows the time change of the set water temperature of the humidifier for dew condensation in the dew condensation test using the dew condensation test apparatus of FIG. 1, the set temperature of the air in a test chamber, and the relative humidity which the said air set. It is explanatory drawing which shows the flow of the air at the time of the preparation stage and drying process in a dew condensation test using the dew condensation test apparatus of FIG. It is a graph which shows the control action of the heater for air heating in the dew condensation test using the dew condensation test apparatus of FIG. It is a graph which shows the control operation | movement of the humidifier for an air conditioning in the dew condensation test using the dew condensation test apparatus of FIG. It is a graph which shows the control operation | movement of the humidifier for dew condensation in the dew condensation test using the dew condensation test apparatus of FIG. It is explanatory drawing which shows the flow of the vapor | steam in the dew condensation process in the dew condensation test using the dew condensation test apparatus of FIG. It is a graph which shows the time change of the water temperature of the humidifier for dew condensation, and the temperature of the air in a test chamber as a test result of the dew condensation test using the dew condensation test apparatus of FIG. It is an expansion perspective view which shows the support body which consists of a resin board as a modification of the support body in the humidifier for condensation of FIG. It is an expansion perspective view which shows the support body which consists of a metal plate which expanded the area which contacts the air which passes along the clearance gap between a storage part and the inner wall of a test tank as another modification of the support body in the humidifier for condensation of FIG. .

  Hereinafter, embodiments of the dew condensation test apparatus of the present invention will be described in more detail with reference to the drawings.

  As shown in FIG. 1, a dew condensation test apparatus 1 according to this embodiment includes a test tank 2 having a test chamber 11 in which a specimen S that is a test object of a dew condensation test is accommodated, and the temperature of the air inside the test chamber 11. And an air conditioning unit 3 for adjusting the humidity, and a dehumidifying humidifier 4 which is disposed inside the test chamber 11 and causes dew condensation on the surface of the specimen S.

  The test tank 2 is a housing formed of a wall having heat insulation properties. The space inside the test chamber 2 is partitioned by a partition plate 17 that is a partition member into a test chamber 11 in which the specimen S is accommodated and an air conditioning passage 12 that communicates with the test chamber 11. A suction port 13 through which air is sucked from the test chamber 11 to the air conditioning passage 12 is formed below the partition plate 17. An air outlet 14 through which air is blown out from the air conditioning passage 12 to the test chamber 11 is formed on the upper side of the partition plate 17.

  Inside the test chamber 11, a dehumidifying humidifier 4 is detachably attached to the inner wall constituting the test chamber 2, and is specifically placed on the floor 15 of the test chamber 2. . An air conditioning unit 3 is arranged inside the air conditioning passage 12.

  Further, a net-like member 16 having a large number of holes is disposed at a position spaced upward from the floor 15 in the test chamber 11. Both ends of the mesh member 16 are fixed to the partition plate 17 and the side wall 18 of the test chamber 2. A specimen S is placed on the mesh member 16.

  In addition, if the air blown into the test chamber 11 through the air outlet 14 directly hits the specimen S, the result of the dew condensation test may be affected. In order to suppress this influence, a windshield may be provided in the test chamber 11.

  Specifically, the air conditioning unit 3 includes an air conditioning humidifier 5, a cooling dehumidifier 6, a heater 7, and a blower 8. The air conditioning humidifier 5, the cooling dehumidifier 6, the heater 7, and the blower 8 are arranged in series along the direction of the air flow B 0 inside the air conditioning passage 12.

  The air conditioning humidifier 5 adjusts the humidity inside the test chamber 11, for example, the relative humidity in this embodiment, by humidifying the air sucked into the air conditioning passage 12 from the suction port 13. The absolute humidity may be adjusted by the air conditioning humidifier 5. The air conditioning humidifier 5 includes a storage unit 19 that stores the water W1 and a heating unit 20 that heats the water. The storage part 19 is a saucer-like member that stores the water W1, and has an upper opening 19a. The heating unit 20 is disposed inside the storage unit 19. The heating unit 20 includes an electric heater or the like, and heats the water W1 inside the storage unit 19 to generate steam. The humidifier 5 for air conditioning is fixed to the floor 15 of the test tank 2.

  The cooling dehumidifier 6 cools and dehumidifies the air drawn into the air conditioning passage 12 from the suction port 13.

  The heater 7 heats the air flowing through the air conditioning passage 12. Thereby, the air sent to the inside of the test chamber 11 is heated.

  The blower 8 sends the air adjusted by the air conditioning humidifier 5, the cooling dehumidifier 6, and the heater 7 inside the air conditioning passage 12 to the test chamber 11 through the air outlet 14. Thereby, the air blower 8 produces | generates the air flow B (refer FIG. 4) which flows through the test chamber 11, the suction inlet 13, the air-conditioning channel | path 12, and the blower outlet 14 in order.

  Next, a specific configuration of the dehumidifying humidifier 4 will be described. The dehumidifying humidifier 4 generates water vapor inside the test chamber 11 to generate dew condensation on the surface of the specimen S. As described above, the dehumidifying humidifier 4 is removably attached to the inside of the test chamber 2 by being placed on the floor 15 inside the test chamber 11.

  The dehumidifying humidifier 4 includes a storage unit 21 that stores the water W2, a heating unit 22 that heats the water, a temperature sensor 23 that detects the temperature of the water, and a support 24 that supports the storage unit 21 from below. And. Since the dehumidifying humidifier 4 is disposed immediately below the specimen S, the vapor generated from the dehumidifying humidifier 4 can quickly reach the specimen S and cause dew condensation.

  The storage part 21 is a saucer-like member that stores the water W2, and has an upper opening 21a. The heating unit 22 is disposed inside the storage unit 21. The heating unit 22 includes an electric heater and the like, and heats the water W2 stored in the storage unit 21 to generate steam.

  As shown in FIGS. 1 and 2, the support 24 is a plurality of metal round bars protruding downward from the lower surface 21 b of the storage unit 21, and is separated from the floor 15 of the test chamber 11. The storage unit 21 is supported. Thereby, a gap 25 is formed between the lower surface 21 b of the storage unit 21 and the floor 15 of the test chamber 11. Thus, when the water W2 inside the storage unit 21 is heated by the heating unit 22 to cause dew condensation on the specimen S, heat conduction from the storage unit 21 to the floor 15 of the test chamber 11 is caused by the gap 25. It is possible to suppress. Furthermore, when air having a temperature lower than the temperature of the water W2 inside the reservoir 21 passes through the gap 25 after dew condensation occurs, the air between the air passing through the gap 25 and the water W2 inside the reservoir 21 By performing the heat exchange, it is possible to quickly cool the water W2 inside the reservoir 21. Thus, in the dehumidifying humidifier 4 having the support 24, for example, when the air temperature inside the test chamber 11 is changed by the air conditioner 3, the water inside the reservoir 21 follows the temperature change of the air. It is possible to change the temperature of W2. Therefore, the temperature difference between the air inside the test chamber 11 and the water inside the reservoir 21 can be reduced.

  The dew condensation test apparatus 1 includes two sensors arranged at the air outlet 14 in the test tank 2, that is, a temperature sensor 10a that detects the temperature of air blown out to the test chamber 11 through the air outlet 14, and the humidity of the air. And a humidity sensor 10b.

  Further, the dew condensation test apparatus 1 includes a controller 9 that controls the air conditioning unit 3 and the dehumidifying humidifier 4. Specifically, based on the temperature and humidity of the air detected by the temperature sensor 10a and the humidity sensor 10b arranged at the air outlet 14, the controller 9 is configured to use the heating unit 20 and the cooling dehumidifier 6 of the humidifier 5 for air conditioning. The heater 7 and the blower 8 are controlled. Furthermore, the controller 9 controls the temperature of the water W2 inside the reservoir 21 based on the control of the humidifier 4 for dew condensation, specifically, the temperature of the water W2 inside the reservoir 21 detected by the temperature sensor 23. The heater 22 is controlled so as to reach a predetermined water temperature, for example, feedback control (PID control or the like) is performed.

  The dew condensation test method using the dew condensation test apparatus 1 configured as described above has two steps, that is, condensation is generated on the surface of the specimen S by generating steam inside the test chamber 11 by the dehumidifying humidifier 4. A dew condensation process for generating air and a drying process for adjusting the temperature and humidity of the air inside the test chamber 11 by the air conditioning unit 3 to dry the air.

Specifically, the condensation test method is performed as follows. First, as shown in the graph of FIG. 3, the air conditioning unit 3 is operated without operating the dehumidifying humidifier 4 in the preparation stage A ₀ (the range of t1 (min) from the start) before performing the dew condensation process. Then, the temperature and humidity inside the test chamber 11 are adjusted in advance to be a predetermined temperature and humidity (for example, a low temperature and high humidity state). Specifically, the controller 9 controls the blower 8 of the air conditioning unit 3 so as to send air from the outlet 14 to the test chamber 11. Thereby, air circulates between the test chamber 11 and the air conditioning passage 12 as indicated by an arrow B in FIG. At the same time, as shown in the graph of FIG. 5, the controller 9 controls the heater 7 to be ON (flag 1) and heats the air circulating to the heater 7. Specifically, the controller 9 controls the heater 7 so that the air temperature becomes a predetermined temperature (in this embodiment, the temperature indicated by the curve II indicating the air temperature in the graph of FIG. 3). Further, similarly to the heater 7, the controller 9 sets the heating unit 20 of the air conditioning humidifier 5 to the ON (flag 1) state as shown in the graph of FIG. Control to heat water W1. Thereby, the humidifier 5 for air conditioning generates steam, and the relative humidity of the circulating air becomes a predetermined relative humidity (in this embodiment, the relative humidity indicated by the curve III indicating the relative humidity in the graph of FIG. 3). Adjust as follows. In the preparatory phase A _0, it is not necessary to operate the air-conditioning humidifier 5.

Next, in the dew condensation process A ₁ (range from t1 to t2 (minutes)) in FIG. 3, the dew condensation test apparatus 1 operates the dehumidifier humidifier 4 without operating the air conditioning unit 3 and causes dew condensation on the specimen S. The operation of the dew condensation process that generates water is performed. Specifically, as shown in the graph of FIG. 5, the controller 9 turns off the heater 7 (flag 0) and stops the operation of the heater 7. Similar to the heater 7, the controller 9 further turns off the heating unit 20 of the air conditioning humidifier 5 as shown in the graph of FIG. 6 and stops the operation of the heating unit 20. Let At the same time, the controller 9 stops the blower 8 and stops the circulation of air between the test chamber 11 and the air conditioning passage 12. Then, the controller 9 turns on the heating unit 22 of the dehumidifying humidifier 4 as shown in the graph of FIG. 7 and heats the water W2 to the steam V by heating the water W2 to the heating unit 22. (See FIG. 8). At this time, the controller 9 is based on the water temperature detected by the temperature sensor 23 so that the water temperature of the dehumidifying humidifier 4 rises along the curve I indicating the set water temperature of the dehumidifying humidifier 4 in the graph of FIG. Then, the heating unit 22 is feedback-controlled. Specifically, the controller 9 sets the predetermined first temperature (time t1) during a predetermined time (the set times t1 to t2 shown in the graph of FIG. 3) in which the water temperature of the dehumidifying humidifier 4 is set in advance. The amount of heat by the heating unit 22 is controlled so as to increase at a constant rate from the heating start temperature in step 2) to a predetermined second temperature (temperature after completion of heating at time t2). Thus, the actual water temperature T _W of condensation humidifier 4, as shown in the graph of FIG. 9 are elevated in dew step A1 in a similar slope and curve I showing the set water temperature of the graph of FIG. Along with this, the air in the test chamber 11 is also gradually warmed by the water W2 whose temperature has risen. Therefore, the temperature T _A of the air rises to follow the water temperature T _W.

  As shown in FIG. 8, when the heating unit 22 heats the water W <b> 2 stored in the storage unit 21 to generate the steam V, the steam V rises and reaches the specimen S through the mesh member 16. . Thereby, it is possible to cause the specimen S to be condensed quickly and in a large amount.

After the condensation process is completed, in the drying process A ₂ (range t2 to t3 (minutes)) in FIG. 3, the condensation test apparatus 1 operates the air conditioning unit 3 without operating the condensation humidifier 4. The temperature and humidity of the air inside the test chamber 11 are adjusted to dry the air, and at the same time, the drying step is performed to cool the water W2 in the storage unit 21 of the dehumidifying humidifier 4. Specifically, the controller 9 stops the operation of the heating unit 22 of the dehumidifying humidifier 4 as shown in the graph of FIG. On the other hand, the controller 9 restarts the operation of the heater 7 as shown in the graph of FIG. 5, and further restarts the operation of the heating unit 20 of the humidifier 5 for air conditioning as shown in the graph of FIG. Let At the same time, the controller 9 restarts the blower 8 and restarts the air circulation between the test chamber 11 and the air conditioning passage 12 as indicated by an arrow B in FIG. At this time, a part of the air B1 passes through the gap 25 between the bottom 21b of the storage unit 21 and the floor 15 of the dehumidifying humidifier 4, so that the water W2 inside the storage unit 21 is separated from the air B1 passing through the gap 25. It is cooled rapidly by heat exchange. Thus, the bottom 21b of the storage unit 21 can be actively used as a heat exchange unit.

At this time, the controller 9 feedback-controls the air conditioning humidifier 5, the cooling dehumidifier 6, and the heater 7 based on the temperature and humidity of the air inside the test chamber 11 detected by the temperature sensor 10 a and the humidity sensor 10 b. To do. Therefore, the temperature of the air inside the test chamber 11 is controlled so as to gradually decrease along the curve II indicating the set temperature of the air in the graph of FIG. Thus, the temperature T _A of the test chamber 11 inside the air, as shown in the graph of FIG. 9 gradually in the drying step A ₂ in the same slope and curve II showing the set temperature of the air in the graph of FIG. 3 Descend. Along with this, the water W2 condensation humidifier 4 by the air in the test chamber 11 is gradually cooled, the water temperature T _W is also lowered following the temperature T _A of the air. Note that, in this drying step A _2, air-conditioning humidifier 5 may not be operated.

In this way, it is possible to condensation quickly and in large quantities specimen S by raising the water temperature of the test chamber 11 inside the condensation humidifier 4 to generate steam in the condensation step A _1. Further, in the subsequent drying process A _2, by adjusting the temperature and humidity in the test chamber 11 inside the air can be lowered temperature of condensation humidifier 4 with drying quickly test chamber 11 inside the air It is.

After the end of the drying step A ₂ again, as described above, performing preliminary stage A _0, condensation step A _1, and a series of cycles of drying A ₂ in order. After the predetermined number of cycles, all the condensation tests are completed.

(Feature)
(1)
In the dew condensation test apparatus 1 of the present embodiment, the dehumidifying humidifier 4 is disposed inside the test chamber 11. Therefore, when the steam is generated by raising the water temperature with the dehumidifying humidifier 4, the vapor is not dehumidified through the air conditioning passage 12 or the like, and the specimen S accommodated inside the test chamber 11. It is possible to reach the surface quickly. Therefore, it is possible to quickly generate a large amount of condensation on the surface of the specimen S.

  Moreover, since the dehumidifying humidifier 4 is arranged inside the test chamber 11, the heat of the water W2 stored in the storage unit 21 of the dehumidifying humidifier 4 is tested via the storage unit 21 and the like. Since it is easily transmitted to the air inside the chamber 11, when the dew condensation occurs, the difference between the water temperature of the dehumidifying humidifier 4 and the air temperature in the test chamber 11 may be reduced. Is possible. Therefore, it becomes easy to adjust the temperature of the air in the test chamber 11 by controlling the water temperature, and the test accuracy of the dew condensation test can be improved.

(2)
In the dew condensation test apparatus 1 of the present embodiment, the air conditioning unit 3 for adjusting the air inside the test chamber 11 includes an air conditioning humidifier 5 that adjusts the relative humidity inside the test chamber 11. Thus, after the condensation is generated on the specimen S, the air conditioning unit 3 adjusts the temperature inside the test chamber 11 to dry the air inside the test chamber 11. It is possible to adjust the relative humidity inside the chamber 11.

  In the drying process, the dehumidifying humidifier 4 is not operated, so that the water temperature of the dehumidifying humidifier 4 does not rise. As a result, the water temperature of the dehumidifying humidifier 4 can be lowered more quickly, and the water temperature can be stabilized at the start temperature of the dew condensation process. Thereby, the test accuracy of the dew condensation test and the reproducibility of the test are improved.

(3)
In the dew condensation test apparatus 1 of this embodiment, the test tank 2 further includes an air conditioning passage 12 communicating with the test chamber 11, and the air conditioning unit 3 is accommodated in the air conditioning passage 12. Thereby, the air adjusted by the air conditioning unit 3 in the air conditioning passage 12 can be quickly sent to the test chamber 11.

(4)
In the dew condensation test apparatus 1 of the present embodiment, the dehumidifying humidifier 4 is detachably attached to the inner wall such as the floor 15 of the test chamber 11, so that the existing constant temperature and constant temperature can be used as the test tank 2 and the air conditioning unit 3. It is possible to use a test chamber 2 and an air conditioning unit 3 of a humidifier or a thermostatic chamber. Therefore, it is not necessary to prepare a device dedicated to the dew condensation test in which the humidifier is permanently installed inside the test chamber 11 only for the dew condensation test, and the dew condensation test can be performed at low cost.

  In other words, it is possible to constitute the dew condensation test apparatus 1 of the above embodiment by attaching the dehumidifying humidifier 4 to a test chamber of an existing constant temperature and humidity chamber.

  In the present invention, the air conditioning unit 3 may be a mechanism that adjusts at least the temperature of the air inside the test chamber 11, and the air conditioning humidifier 5 may be omitted. Therefore, when the humidifier 5 for air conditioning described above is unnecessary, it is possible to configure the dew condensation test apparatus 1 of the present invention by attaching the dehumidifier humidifier 4 to the conventional test chamber of the constant temperature bath.

(5)
In the dew condensation test apparatus 1 of the present embodiment, the support 24 supports the storage unit 21 separately from the inner wall such as the floor 15 of the test chamber 11, so that the space between the storage unit 21 and the inner wall of the test chamber 11 is supported. A gap 25 is formed. Therefore, when the heating unit 22 heats the water W <b> 2 inside the storage unit 21 to generate steam and generate condensation, heat conduction from the storage unit 21 to the inner wall of the test chamber 11 is caused by the gap 25. Therefore, it is possible to efficiently heat the water W2 inside the storage unit 21. Furthermore, when air having a temperature lower than the temperature of the water W2 inside the reservoir 21 passes through the gap 25 after dew condensation occurs, the air between the air passing through the gap 25 and the water W2 inside the reservoir 21 By performing the heat exchange, it is possible to quickly cool the water W2 inside the reservoir 21.

(6)
In the dew condensation test method of the present embodiment, a large amount of dew condensation can be quickly generated on the surface of the specimen S by the dehumidifying humidifier 4 disposed inside the test chamber 11 in the dew condensation process. Further, in the drying process, it is possible to evaporate condensation by adjusting the temperature of the air inside the test chamber 11 and drying the air by the air conditioning unit 3. Thereby, it is possible to perform a dew condensation test of a desired cycle by alternately generating and evaporating dew condensation.

  In the present invention, the following modifications are also included in the scope of the present invention.

(Modification)
(A)
In the dehumidifying humidifier 4 of the above embodiment, as shown in FIG. 2, a metal round bar is taken as an example of the support 24 that supports the storage portion 21, but in the present invention, the support is used. There is no particular limitation on the material and shape.

  For example, as in the modification shown in FIG. 10, the support 24 may be formed of a resin plate. In this case, compared to the metal support 24, when the water W2 stored in the storage unit 21 is heated, heat is transferred from the storage unit 21 via the support 24 to the floor 15 of the test tank 2, etc. It becomes difficult to conduct to the inner wall, and the water W2 can be quickly heated to moisten the air.

(B)
Further, as in the modification shown in FIG. 11, the support 24 comes into contact with the air passing through the gap 25 between the storage portion 21 and the inner wall such as the floor portion 15 of the test chamber 11 and radiates heat from the storage portion 21 to the air. You may make it have the heat sink part 24a which functions as a thermal radiation part to perform. The support 24 is made of a thin metal plate or the like. In such a configuration, the heat sink portion 24a of the support 24 has a flat plate shape so that an area where the support 24 and the air passing through the gap 25 come into contact with each other is enlarged. When the heat sink part 24a comes into contact with air over a wide range, it becomes easy to radiate heat from the storage part 21 to the air, and the heat of the water W2 inside the storage part 21 is quickly transmitted to the air via the support 24. Is possible. As a result, the water W2 inside the reservoir 21 can be cooled more quickly by the air passing through the gap 25.

  A heat insulating member may be installed below the heat sink portion 24a (that is, between the heat sink portion 24a and the floor portion 15 of the test chamber 11). Thus, when the water W2 stored in the storage unit 21 is heated, the heat is less likely to be transferred from the storage unit 21 to the inner wall such as the floor 15 of the test tank 2 through the heat sink unit 24a. Can be heated to moisten the air. For example, a member made of a material such as a resin plate or silicone rubber can be used as the heat insulating member, but the present invention is not particularly limited to the material. The shape of the heat insulating member may be, for example, the shape of a single large plate that can be laid under the plurality of heat sink portions 24a, or the shape of a cap that covers and protects the lower end portion of each heat sink portion 24a. Although it can be employed, the present invention is not particularly limited in shape.

  As described above, various forms can be adopted for the support 24 that supports the storage portion 21, but the present invention is not limited to having the support 24, and the support 24. May be omitted.

(C)
In the above embodiment, the dehumidifying humidifier 4 is mounted on the floor 15 of the test chamber 11 so as to be removable from the inner wall of the test chamber 11, but the present invention is limited to this. Is not to be done. As a modification, the dehumidifying humidifier 4 may be detachably attached to the side wall 18 constituting the test chamber 11 in the test tank 2. Alternatively, the dehumidifying humidifier 4 may be fixed to the floor 15 or the side wall 18.

(D)
In the said embodiment, although the air-conditioning part 3 is arrange | positioned inside the air-conditioning channel | path 12 of the test tank 2, this invention is not limited to this, The air-conditioning part 3 is arrange | positioned outside the test tank 2 May be.

(E)
In addition, in the said embodiment, although the air blower 8 is stopped during a dew condensation process, this invention is not limited to this. That is, it is preferable to stop the blower 8 during the dew condensation process, but the blower 8 may be operated during the dew condensation process. For example, you may operate the air blower 8 so that it may become a ventilation volume lower than the ventilation volume in a drying process during a condensation process. Or you may always operate the air blower 8 in all the processes including a dew condensation process, without controlling the ventilation volume.

(F)
In the above embodiment, the air blowing direction to the test chamber 11 is a direction in which air is blown out from the air outlet 14 on the upper side of the test chamber 11 and air is sucked in from the suction port 13 on the lower side of the test chamber 11. Is not limited to this. That is, the air blowing direction opposite to that of the above embodiment, specifically, the air blowing direction in which air is sucked in from the upper side of the test chamber 11 and air is blown out from the lower side may be used.

DESCRIPTION OF SYMBOLS 1 Condensation test apparatus 2 Test tank 3 Air-conditioning part 4 Condensation humidifier 7 Air-conditioning humidifier 11 Test chamber 21 Humidification dish 22 Heater 24 Support body 24a Heat sink part 25 Clearance S Specimen W1, W2 Water

Claims (7)

A test chamber having a test chamber in which a specimen is stored;
An air conditioning unit for adjusting at least the temperature of air inside the test chamber;
A dehumidifying humidifier that is disposed inside the test chamber and generates steam on the surface of the specimen by generating steam inside the test chamber;
The dehumidifying humidifier has a storage unit that stores water and a heating unit that heats the water.
Condensation test equipment. The air-conditioning unit further includes an air-conditioning humidifier that adjusts the humidity inside the test chamber.
The dew condensation test apparatus according to claim 1. The test tank further includes an air conditioning passage communicating with the test chamber,
The air conditioning unit is housed in the air conditioning passage.
The dew condensation test apparatus according to claim 1 or 2. The dehumidifying humidifier is detachably attached to an inner wall constituting the test chamber in the test tank.
The dew condensation test apparatus according to any one of claims 1 to 3. The dehumidifying humidifier further includes a support that supports the storage unit in a state of being separated from the inner wall of the test chamber.
The dew condensation test apparatus according to any one of claims 1 to 4. The support has a heat sink part that functions as a heat radiating part that contacts the air passing through the gap between the storage part and the inner wall of the test chamber and radiates heat from the storage part to the air.
The dew condensation test apparatus according to any one of claims 1 to 5. A dew condensation test method using the dew condensation test apparatus according to claim 1,
A dew condensation step for generating dew on the surface of the specimen by generating steam inside the test chamber by the dehumidifying humidifier;
In a state where the dehumidifying humidifier is stopped, the air conditioning unit adjusts at least the temperature of the air in the test chamber to dry the air,
Condensation test method characterized by including.

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