JP6404849B2 - Temperature / humidity adjuster and environmental test apparatus equipped with the same - Google Patents

Description

  The present invention relates to a temperature / humidity adjuster and an environmental test apparatus including the same.

  In general, as an environmental test apparatus capable of performing an environmental test for testing the performance of a sample under various temperature and humidity conditions, for example, an environmental test apparatus described in Patent Document 1 is known.

  As shown in FIG. 10, the environmental test apparatus 21 includes a chamber 22 having a test chamber 22 a that houses a sample 50 and an air conditioning chamber 22 b that communicates with the chamber 50, and a refrigerator 23 as a device housed in the air conditioning chamber 22 b. And a heater 24, a humidifier 25, and a blower 26.

  The environmental test apparatus 21 includes a heater 24 and a humidifier 25 separately. The refrigerator 23 cools and dehumidifies the air introduced from the test chamber 22a to the air conditioning chamber 22b. The heater 24 includes a heater for heating, and heats the air cooled by the refrigerator 23 to give sensible heat to the air. The humidifier 25 includes a humidifying heater, generates steam, and applies latent heat to the air sent to the test chamber 22a.

Japanese Patent No. 2928162

  As described above, the environmental test apparatus conventionally used has a heater for heating and a heater for humidification separately. In such a configuration, each capacity of the heater for heating and the heater for humidification (specifically, the heater capacity or the power capacity corresponding thereto) is the total load (that is, the sensible heat load) in the cold heat source device (for example, the refrigerator 23). It is necessary to have a capacity equal to the sum of the latent heat loads). This is because the cold heat source equipment (refrigerator 23) is selected in consideration of the maximum load, and when the capacity of the cold heat source equipment is not variable, in order to cancel the remaining cold heat source capacity when the load is minimized, This is because the heating heater and humidifying heater capabilities corresponding to the capability of the cold heat source device are required. For example, if the cold source device works at a sensible heat ratio of 1 (ie, when the total heat is used for sensible heat change), the capacity of the heater needs to be equal to the cold source equipment capacity to counteract it. On the other hand, if the cold heat source device works at a sensible heat ratio of 0 (all works for dehumidification), the ability of the humidifying heater is required to be equal to the ability of the cold heat source equipment to cancel out this.

  Therefore, the sum of the capacity of the heater for heating and the capacity of the heater for humidification must be double the capacity of the cold heat source device. Therefore, in the configuration of the conventional environmental test apparatus, it is difficult to reduce the combined capacity of the heaters (heating heater and humidifying heater) of the heater 24 and the humidifier 25.

  This invention is made | formed in view of the above situations, and it aims at providing the temperature / humidity regulator which can reduce the capacity | capacitance of the heat generating part which heats and humidifies air.

  In order to solve the above problems, the temperature and humidity controller of the present invention is a temperature and humidity controller that adjusts the temperature and humidity of the target space, and a storage unit capable of storing water, and the storage unit A heat generating part that is housed inside the storage part and generates heat inside the storage part, an adjustment part that adjusts a ratio of a part of the heat generation part that is immersed in water stored inside the storage part, and the ratio of the adjustment part And a control unit that controls to change.

  In this structure, it is possible to adjust the ratio of the part immersed in the water stored inside the storage part among the heat generating parts by the adjustment part. Thereby, one heat generating part has a part that functions as a humidifying heater that generates steam and a part that functions as a heater for heating the steam. Then, by adjusting the ratio of the portion immersed in water, the ratio of the amount of heat generated by the heat generating part, that is, the amount of heat used for latent heat for generating steam and the temperature of the air containing the steam is increased. It is possible to change the ratio of the amount of heat used for sensible heat. As a result, depending on the capacity required for heating and humidifying the air in the target space, the thermal moisture ratio of the air (that is, the ratio of the change in specific enthalpy to the change in absolute humidity) is arbitrarily controlled. Is possible. As a result, it is possible to significantly reduce the capacity of the heat generating portion as compared with the total capacity of the heater and the humidifier used in the conventional environmental test apparatus.

  The adjustment unit preferably has a configuration for adjusting the water level of the storage unit in order to adjust the ratio.

  In such a configuration, the ratio of the portion where the heat generating part is immersed in water can be easily adjusted by the adjustment unit adjusting the water level of the storage unit.

  It is preferable that the control unit controls the heat generating unit so as to change an amount of heat generated by the heat generating unit.

  In such a configuration, it is possible not only to adjust the ratio of the portion where the heat generating portion is immersed in water by the adjusting portion, but also to adjust the heat-moisture ratio of the air more finely by changing the amount of heat generated by the heat generating portion. . As a result, the temperature and humidity of the air can be adjusted so as to reach the target temperature and humidity at an early stage.

  It is preferable that the apparatus further includes a temperature detection unit that detects the temperature of air in the target space, and the control unit controls the heat generation unit to change the amount of heat generated by the heat generation unit based on the temperature of the air. .

  In such a configuration, it becomes possible to change the amount of heat generated by the heat generation unit based on the temperature of the air detected by the temperature detection unit, and to adjust the air temperature to reach the target temperature accurately. Is possible.

  The apparatus further includes a humidity detection unit that detects the humidity of the air in the target space, and the control unit controls the adjustment unit so that the ratio changes based on the humidity of the air detected by the humidity detection unit. Is preferred.

  In such a configuration, based on the humidity of the air detected by the humidity detection unit, it is possible to change the rate at which the heating unit is immersed in water by the adjustment unit, so that the humidity of the air accurately reaches the target humidity. It is possible to adjust as follows.

  A temperature detection unit that detects the temperature of the air in the target space and a humidity detection unit that detects the humidity of the air in the target space, and for heating the air based on the temperature detected by the temperature detection unit For the humidification of the air based on the heating output D% and the humidity detected by the humidity detection part, the ratio of the output of the part not immersed in water in the heating part required for the maximum output of the whole heating part In the case where the ratio of the required output of the heat generating part in the heat generating part to the maximum output of the heat generating part is the humidified output W%, the output H% of the heat generating part is D + W ≦ 100. , H = (D + W)%, D + W> 100, the control unit may control the output H of the heat generating unit so that H = 100%.

  With this configuration, it is possible to optimally adjust the output of the heat generating portion according to the output required for heating and humidification so that the maximum output is within 100%. Therefore, it is possible to reliably reduce the overall capacity of the heat generating part.

  The environmental test apparatus of the present invention is the target space, a test chamber in which a sample is accommodated, an air conditioning unit that adjusts the temperature of air in the test chamber, and the temperature and humidity of air that is temperature-adjusted in the air conditioning unit The temperature / humidity regulator is provided for adjusting the temperature.

  In such a configuration, after adjusting the temperature of the air in the test chamber in which the sample is stored in the air conditioning unit, both the temperature and humidity of the air are adjusted to the target temperature and humidity by one temperature and humidity controller. Is possible. Therefore, there is no need to separately provide a heater and a humidifier corresponding to the capacity of the air conditioning unit as in the conventional environmental test device, and the capacity of the heat generating unit for heating and humidifying air can be greatly reduced. become. As a result, it is possible to reduce the facility power of the entire environmental test apparatus.

  As described above, according to the temperature / humidity adjuster of the present invention, the capacity of the heat generating unit that heats and humidifies the air can be reduced.

  According to the environmental test apparatus of the present invention, the facility power of the entire environmental test apparatus can be reduced by providing the temperature and humidity regulator.

1 is a system configuration diagram illustrating an overall configuration of an environmental test apparatus including a temperature / humidity adjuster according to an embodiment of the present invention. It is a figure which shows the structure of the temperature / humidity regulator of FIG. It is explanatory drawing which represented the increase / decrease in the heating output by the temperature / humidity regulator of FIG. 2 and the increase / decrease in the humidification output typically on the air diagram. It is explanatory drawing which represented the heat | fever moisture ratio vector with the sum of the heating vector and the humidification vector. The temperature and humidity adjuster shown in FIG. 2 moves the temperature and humidity from the initial state P ₀ (dry bulb temperature T ₁ ° C, relative humidity Y ₁ %) toward the target P ₆ (dry bulb temperature T ₂ , relative humidity Y ₂ %). It is explanatory drawing explaining the operation | movement which adjusts on an air diagram. FIG. 3 is an explanatory diagram for explaining the operation of adjusting the temperature and humidity by the temperature / humidity adjuster when the entire amount of air cooled by the refrigerator in the environmental test apparatus of FIG. 1 flows into the temperature / humidity adjuster. is there. Explanatory drawing explaining the operation | movement which adjusts the temperature and humidity by the said temperature / humidity regulator in case some air cooled with the refrigerator in the environmental test apparatus of FIG. 1 flows in into a temperature / humidity regulator on an air diagram. It is. It is a figure which shows the modification of the temperature / humidity regulator of this invention. It is a figure which shows the other modification of the temperature / humidity regulator of this invention. It is a block diagram of the conventional environmental test apparatus.

  Hereinafter, embodiments of the temperature and humidity controller and the environmental test apparatus of the present invention will be described in more detail with reference to the drawings.

  The environmental test apparatus 1 shown in FIG. 1 includes a chamber 2, a refrigerator 3, a temperature / humidity adjuster 4, and a blower 8.

  The chamber 2 includes a test chamber 2a that houses a sample 50 for an environmental test, and an air-conditioning chamber 2b that communicates with the test chamber 2a through two openings. The test chamber 2 a is a target space in which the temperature and humidity are adjusted by the temperature and humidity adjuster 4. The blower 8 generates an air flow that circulates between the test chamber 2a and the air conditioning chamber 2b. The outer wall of the chamber 2 is composed of a heat insulating wall.

  In this embodiment, the partition wall 12 is provided inside the air conditioning room 2b. The partition wall 12 is divided into a space in which the refrigerator 3 is accommodated and a space in which the blower 8 is accommodated. The two spaces communicate with each other so that air can flow through the suction pipe 10, the temperature / humidity adjuster 4 (specifically, the storage section 5), and the discharge pipe 11.

  The refrigerator 3 cools and dehumidifies the air introduced from the test chamber 2a to the air conditioning chamber 2b. The refrigerator 3 functions as an air conditioning unit that adjusts the temperature of air introduced from the air conditioning chamber 2b to the test chamber 2a. In addition, the air-conditioning part of this invention should just be able to adjust the temperature of air, and may be not only the refrigerator 3 but another cooling device, and may be an air-conditioner which can heat and cool air.

  The temperature / humidity adjuster 4 has a configuration for adjusting the temperature and humidity of the air cooled and dehumidified by the refrigerator 3.

  Specifically, as shown in FIGS. 1 and 2, the temperature / humidity adjuster 4 controls the storage unit 5 that stores the water W, the heat generating unit 6 that generates heat inside the storage unit 5, and the water level of the storage unit 5. The adjustment part 7 to adjust, the temperature detection part 13, the humidity detection part 14, and the control part 15 are provided.

  The storage part 5 has a space part in which the water W can be stored. The space is a columnar or rectangular parallelepiped space that is longer in the vertical direction and has a height greater than the maximum amount of change in the water level. The reservoir 5 is connected to a suction pipe 10 and a discharge pipe 11 that communicate with the two spaces of the air conditioning chamber 2b. The outlet on the storage unit 5 side of the suction pipe 10 is disposed above the height of the maximum change in water level so that water inside the storage unit 5 does not flow in.

  The heat generating unit 6 is housed inside the storage unit 5 and generates heat inside the storage unit 5. Specifically, the heating unit 6 includes an electric heating element 6a that generates heat when energized, and a current supply unit 6b that supplies current to the electric heating element 6a. The electric heating element 6 a is housed inside the storage unit 5. The current supply unit 6b is disposed outside the storage unit 5, and is electrically connected to the electric heating element 6a.

  The electric heating element 6a has a bar-like or coil-like shape that is long in the vertical direction. The electric heating element 6 a is arranged in a state where it stands inside the storage unit 5. In FIGS. 1 and 2, the electric heating element 6 a is arranged so as not to be attached to the bottom of the storage unit 5, but may be arranged to be attached to the bottom.

  The electric heating element 6a only needs to generate heat when energized, and has a heating wire such as a nichrome wire. The heating wire may be protected with a ceramic or metal sheath. In this case, not only the heating wire is protected, but also damage to the wall of the storage portion 5 around the electric heating element 6a can be prevented.

  The adjusting unit 7 is configured such that the ratio R (specifically, water relative to the height of the electric heating element 6a) of the portion where the heating element 6 (specifically, the electric heating element 6a) is immersed in the water W stored in the storage unit 5 is used. In order to adjust the ratio of the portion 6a1 immersed in W), the water level of the reservoir 5 that stores the water W is adjusted.

  Specifically, the adjustment unit 7 includes a water level adjustment tank 7a, a pair of pressure equalizing pipes 7b and 7c that connect the storage unit 5 and the water level adjustment tank, a water supply control valve 7d, a drainage control valve 7e, and a water level adjustment tank. 7a and a level sensor 7f for detecting the water level inside.

  The reservoir 5 and the water level adjusting tank 7a communicate with each other through a pair of pressure equalizing pipes 7b and 7c at the upper end and the lower end, respectively. Thereby, the water head pressure (head) of the storage part 5 and the water level adjustment tank 7a is equalized, and the water level of the water level adjustment tank 7a is always kept the same as the water level of the storage part 5. In addition, you may make it the structure which adjusts a water level by supply and discharge | emission of the water in the storage part 5, without providing the water level adjustment tank 7a.

  The water supply control valve 7d adjusts the amount of water supplied into the water level adjusting tank 7a. The drainage control valve 7e adjusts the amount of water discharged from the water level adjusting tank 7a to the outside. The water supply control valve 7d and the drainage control valve 7e may be provided in the storage unit 5. Moreover, you may make it the structure which collects water supply and waste_water | drain together and controls a water level as one system.

  The level sensor 7f can monitor the water level (particularly, the highest water level and the lowest water level) of the reservoir 5 by detecting the water level of the water level adjusting tank 7a. Further, the level sensor 7f can monitor the water level at every predetermined height (so-called division monitoring).

  The temperature detector 13 detects the temperature of the air in the test chamber 2a. The humidity detector 14 detects the humidity of the air in the test chamber 2a. For example, the temperature detection unit 13 and the humidity detection unit 14 are provided in the vicinity of the outlet on the upper side of the air conditioning chamber 2b in the test chamber 2a, but may be provided in other locations in the test chamber 2a.

  The control unit 15 controls the adjustment unit 7 so that the ratio R of the portion in which the heat generating unit 6 (specifically, the electric heating element 6a) is immersed in the water W stored in the storage unit 5 changes, and the heat generating unit 6 The heat generating unit 6 is controlled so as to change the amount of heat generated.

When the adjustment unit 7 changes the water level of the storage unit 5 to L ₁ (that is, the position of the water level below the electric heating element 6a of the heating unit 6), all of the heating unit 6 is not immersed in the water W. The ratio R becomes zero. In this case, the temperature / humidity adjuster 4 functions as a heater that heats air (in other words, functions as a sensible heat ratio 1 (that is, uses the total amount of heat of the heat generating portion 6 for sensible heat change)). . On the other hand, when the water level is changed to L ₂ (that is, the position above the electric heating element 6a of the heat generating portion 6), the ratio R is 1. In this case, the heat generating part 6 acts as a humidifier that generates steam (in other words, the temperature / humidity adjuster 4 uses the sensible heat ratio 0 (that is, uses the total heat quantity of the heat generating part 6 for latent heat change). )Function).

  Therefore, when the ratio R of the portion immersed in the water W is in the range of 0 <R <1, the temperature / humidity adjuster 4 can exhibit both functions of the heater and the humidifier.

  Specifically, when the ratio R of the portion immersed in the water W of the heat generating unit 6 is changed by the adjusting unit 7, only the steam exiting the storage unit 5 is applied and the thermal moisture ratio is changed. The heat / moisture ratio is the ratio of the amount of change in specific enthalpy to the amount of change in absolute humidity, and specifically corresponds to the amount of heat required to evaporate 1 kg of water.

For example, in the air diagram shown in FIG. 3 (the dry bulb temperature x on the horizontal axis and the absolute humidity z on the vertical axis), the water level is changed by the adjusting unit 7 to thereby change the direction of the thermal moisture ratio vector B _{0 in} the initial state. Changes. Here, as shown in FIG. 4, the heat / moisture ratio vector B ₀ is a heating vector Bx (a vector that moves on an equal vapor amount line in an air diagram) and a humidification vector Bh (in an atmospheric pressure environment). 640 kcal / kg), which means a vector obtained by synthesizing.

For example, when the humidification output of the temperature / humidity adjuster 4 is increased, the adjustment unit 7 raises the water level. At this time, the tip Q of the heat and moisture ratios vector B _0, by displacing the upper left along the isenthalpic line E (the direction of arrow B _1), the direction of the heat and moisture ratios vector B ₀ is more upward change. On the other hand, the water level is lowered when reducing the humidification output. At this time, the tip Q of the heat and moisture ratios vector B _0, by displacing the lower right side (direction of arrow B ₂₎ along the isenthalpic line E, the direction of the heat and moisture ratios vector B ₀ is the more downward change.

  By changing the water level as described above, the ratio R of the portion 6a1 of the electric heating element 6a immersed in the water W can be changed, and the electric heating element 6a is immersed in the water W. It is possible to use the part 6a1 as a part for humidification (latent heat) and use the part 6a2 which is not immersed as a part for heating (sensible heat).

  Therefore, inside the reservoir 5, it is possible to heat the steam generated by evaporating the water W by the portion 6a1 immersed in the water W of the electric heating element 6a by the portion 6a2 not immersed in the water W. is there. Thereby, it becomes possible to change the thermal moisture ratio of the air discharged from the temperature / humidity adjuster 4.

On the other hand, when the control unit 15 controls the heat generating unit 6 to change the amount of heat generated by the heat generating unit 6, the length of the heat / moisture ratio vector B ₀ changes in the air diagram shown in FIG.

For example, when the heating output of the temperature / humidity adjuster 4 is increased, the output of the heat generating unit 6 is increased. At this time, the tip Q of the heat and moisture ratios vector B _0, by moving on a line along the vector B ₀ forward (direction of arrow B _3), heat moisture ratio vector B ₀ becomes longer. On the other hand, when reducing the heating output, the output of the heat generating part 6 is lowered. At this time, the tip Q of the heat and moisture ratios vector B _0, by moving on a line along the vector B ₀ backward (direction of arrow B _4), heat moisture ratio vector B ₀ is shortened.

  As described above, as shown in FIG. 3, the control unit 15 controls the water level adjustment by the adjustment unit 7 and the output of the heat generation unit 6, thereby arbitrarily setting the direction and length of the thermal moisture ratio vector B. It is possible to change. Thereby, according to the capability requested | required for the heating and humidification of the air of the test chamber 2a, it becomes possible to adjust the thermal moisture ratio of air accurately.

  Specifically, the control unit 15 controls the output H of the heat generating unit 6 as follows in accordance with the output required for air heating (heating output) and the output required for humidification (humidification output). .

  Here, based on the temperature detected by the temperature detection unit 13, the ratio of the output of the portion 6a2 not immersed in the water W in the heating unit 6 required for heating the air to the maximum output of the entire heating unit 6 is heated. The output is D%. The ratio of the output of the part 6a1 immersed in the water W in the heat generating part 6 required for humidifying the air based on the humidity detected by the humidity detecting part 14 to the maximum output of the heat generating part 6 is the humidified output W%. To do.

In this case, the output H% of the heat generating part 6 is
When D + W ≦ 100, H = (D + W)%
When D + W> 100, H = 100%
Thus, the control unit 15 controls the output H of the heat generating unit 6. Thereby, according to the output (namely, heating output D and humidification output W) requested | required for heating and humidification, it is possible to adjust optimally so that the output H of the heat generating part 6 may be kept below 100% of maximum output. is there. Therefore, it is possible to reliably reduce the entire capacity of the heat generating portion 6.

  When output control is performed with temperature priority, when D + W> 100, the heating output D is maintained and the humidification output W is changed to W = 100−D (D and W are 0 or more) Within 100 or less). That is, heating may be performed with priority over humidification, and control may be performed to reach the target humidity after reaching the target temperature.

  Further, the control unit 15 controls the water level L% as L = {W / (D + W)} × 100% according to the heating output D and the humidification output W. Here, the water level L is, for example, the closest height that does not touch the lower end of the heat generating portion 6 (specifically, the electric heating element 6a) is 0%, and the height of the upper end of the heat generating portion 6 is 100%.

  When the water level L is 0%, steam is not generated and air is only heated (that is, sensible heat rises). Therefore, the air introduced into the storage unit 5 by the blower 8 is used to store the storage unit 5. It is possible to convey (heat transfer) the sensible heat rising inside to the test chamber 2a.

  Next, a method for adjusting the temperature and humidity of the air inside the test chamber 2a using the temperature / humidity adjuster 4 of the present embodiment will be described.

As shown in FIG. 5, the initial temperature of the air inside the test chamber 2 a is T ₁ ° C., the relative humidity is Y ₁ % (point P ₀ position), and the temperature and humidity regulator 4 is used to set the target temperature. Consider the case of adjusting to T ₂ ° C and relative humidity Y ₂ % (position of point P ₆ ) (temperatures T ₁ and T ₂ are both dry bulb temperatures).

First, as step S1, the control unit 15 causes the heating unit 6 to output 100% in a state where the water level L is 0% until the temperature of the air in the test chamber 2a detected by the temperature detection unit 13 reaches the target T ₂ ° C. The heat generating portion 6 is controlled so as to heat the air at (maximum output) (transition from point P _{0 to} point P _{1 in} FIG. 5).

When the target T ₂ ° C is reached, as step S2, the control unit 15 controls the output of the heat generating unit 6 to decrease, and also adjusts the adjustment unit 7 to increase the water level of the storage unit 5 in order to increase the humidity. Control (shift from point P _{1 to} point P _{2 in} FIG. 5). At this time, since the amount of heat used for heating the air in the heat generating portion 6 is reduced, the temperature of the air is lowered. This movement corresponds to the tip P ₁ of the heat / moisture ratio vector P ₀ P ₁ on the air diagram moving to the upper left along the isenthalpy line E1.

Then, in step S3, the control unit 15, in order to regain the amount that the temperature of the air drops when moving to the point P ₁ → point P _2, unabated as when the water level of the point P _2, the heat generating portion 6 Is controlled so that the air is heated until the target T ₂ ° C. is reached again (transition from point P _{2 to} point P _{3 in} FIG. 5).

Thereafter, the control unit 15 repeats the above steps S1 to S3 until the target temperature T ₂ ° C. and the relative humidity Y ₂ % (position of the point P ₆ ) are reached. After reaching the target temperature and humidity, the temperature and humidity regulator 4 continues to operate so as to maintain the temperature and humidity.

  When the temperature / humidity adjuster 4 performs temperature / humidity operation with temperature priority as in steps S1 to S3 described above, control is performed to reduce the heating output when the target temperature is reached. There is no risk of exceeding the temperature and it is safe. On the other hand, when temperature / humidity operation is performed with priority on humidity, humidification is continued unless the target relative humidity is reached, and heating is continued along with humidification based on the heat-moisture ratio. There is a concern that the pawl will not be able to stop. Therefore, the temperature / humidity adjuster 4 is safer to perform temperature-priority operation than humidity-priority operation.

  Here, the temperature and humidity inside the test chamber 2a of the environmental test apparatus 1 change not only due to the temperature / humidity adjustment by the temperature / humidity adjuster 4 but also due to various factors. For example, the factors include temperature rise due to heat generation of the sample 50 in the test chamber 2a, temperature rise due to shaft power in the blower 8, and cooling by the refrigerator 3 for suppressing these temperature rises.

Therefore, in normal operation of the environmental test apparatus 1, it is necessary to operate the temperature / humidity adjuster 4 in consideration of these factors. Specifically, when the temperature / humidity adjuster 4 is operated so as to maintain the target state C (the state where the temperature of the test chamber 2a is at the target temperature and humidity) as shown in the air diagram of FIG. Includes a heat / moisture ratio vector J ₄ (from state A to state C ′) that cancels the combined vector of the temperature increase vector J ₁ in the blower 8, the temperature increase vector J ₂ due to the sample 50 and the cooling vector J ₃ due to the refrigerator 3. The control unit 15 controls the output of the heat generating unit 6 and the water level of the storage unit 5 so that a return vector) is obtained. As a result, the state A in which the load of the vectors J _{1 to} J ₃ on the isoenthalpy line E _A is loaded is shifted to the state C ′ in front of the fan in the target state C on the isoenthalpy line E _C ′. Is possible. In particular, the control of changing the direction of the heat / moisture ratio vector J ₄ so as to approach the state C ′ along the isoenthalpy line E _C ′ can be easily performed by controlling the water level. Here, when the heater and the humidifier are separately provided as in the conventional environmental test apparatus, the humidification vector K1 by the humidifier and the heating vector by the heater are compared with the output control by the temperature and humidity regulator 4 described above. Output control for combining K2 and returning from state A to state C is required, and this control may take time.

Further, when the opening 12a is formed in the partition wall 12 of the air conditioning room 2b in FIG. 1, the air passing through the temperature / humidity adjuster 4 and the air passing through the opening 12a without passing through the temperature / humidity adjuster 4 are The mixture is discharged to the test chamber 2a. When it is assumed that the temperature / humidity regulator 4 is operated so as to maintain the target state C as shown in the air diagram of FIG. 7 under such conditions, the air passing through the opening 12a (isoenthalpy line) a state a) the load of the vector J ₁ through J ₃ is applied in the E _a, mixed air of air (equal state B is on the enthalpy E _B) through the temperature and humidity regulator 4 is in the state C ' Thus, the control unit 15 may control the output of the heat generating unit 6 and the water level of the storage unit 5. Moreover, when it has the opening 12a, you may comprise so that the control period which does not flow air to the temperature / humidity regulator 4 may be provided for the whole quantity.

  As described above, in the temperature / humidity adjuster 4 of the present embodiment, the adjustment unit 7 can adjust the ratio R of the portion where the heat generating unit 6 is immersed in the water W stored in the storage unit 5. Thereby, one heat generating part 6 has a part that functions as a humidifying heater that generates steam and a part that functions as a heater for heating the steam. Then, by adjusting the ratio R of the portion immersed in water, the ratio of the amount of heat generated by the heat generating unit 6, that is, the amount of heat used for latent heat for generating steam and the temperature of the air containing the steam is determined. It is possible to change the ratio of the amount of heat used for increasing the sensible heat. Thereby, according to the capability requested | required for the heating and humidification of the air of the test chamber 2a, it is possible to arbitrarily control the thermal moisture ratio of the air. As a result, the capacity of the heat generating unit 6 can be significantly reduced (at most, halved) compared to the total capacity of the heaters of the heater and the humidifier used in the conventional environmental test apparatus.

  Moreover, since the capacity | capacitance of the heat generating part 6 can be reduced, it becomes possible to suppress the maximum load current and rated output of the product specification of the environmental test apparatus 1 including the temperature / humidity adjuster 4, and the energy saving effect is high. In addition, it is possible to reduce the primary side equipment (for example, power transformer capacity) and the electrical wiring construction cost of the environmental test apparatus 1.

  In the temperature / humidity adjuster 4 of the present embodiment, the ratio R of the portion where the heat generating unit 6 is immersed in the water W can be easily adjusted by adjusting the water level of the storage unit 5 in which the adjustment unit 7 stores the water W. Is possible.

  In the temperature / humidity adjuster 4 of the present embodiment, the control unit 15 controls the heat generating unit 6 so as to change the amount of heat generated by the heat generating unit 6, so that the heat generating unit 6 is immersed in the water W by the adjusting unit 7. In addition to adjusting the ratio R, it is also possible to change the amount of heat generated by the heat generating portion 6. Thereby, it is possible to adjust the thermal moisture ratio of air more finely, and as a result, it is possible to adjust the temperature and humidity of air to reach the target temperature and humidity at an early stage.

  In the temperature / humidity adjuster 4 of the present embodiment, the amount of heat generated by the heat generating unit 6 can be changed based on the temperature of the air detected by the temperature detecting unit 13, so that the temperature of the air is accurately set to the target temperature. Can be adjusted to reach.

  In the temperature / humidity adjuster 4 of the present embodiment, the ratio R at which the heat generating unit 6 is immersed in the water W can be changed by the adjusting unit 7 based on the humidity of the air detected by the humidity detecting unit 14. It is possible to adjust the air humidity to reach the target humidity accurately.

  The environmental test apparatus 1 according to the present embodiment includes the temperature / humidity adjuster 4 that adjusts the temperature and humidity of the air that has been temperature-adjusted by the refrigerator 3, so that the air in the test chamber 2a in which the sample 50 is stored. It is possible to adjust both the temperature and humidity of the air to the target temperature and humidity by one temperature / humidity adjuster 4 after performing the temperature adjustment in the refrigerator 3 (air conditioning unit). Accordingly, it is not necessary to separately provide a heater and a humidifier corresponding to the capacity of the refrigerator 3 (air conditioning unit) as in the conventional environmental test apparatus, and the capacity of the heating unit 6 for heating and humidifying air is greatly increased. Can be reduced. As a result, it is possible to reduce the facility power of the entire environmental test apparatus.

  In the said embodiment, although the adjustment part 7 has the structure provided with the water supply control valve 7d and the waste_water | drain control valve 7e in order to adjust the water level of the storage part 5 which stores the water W, this invention corresponds to this. It is not limited. As a modification of the temperature / humidity adjuster of the present invention, as shown in FIG. 8, the adjustment unit 16 penetrates the bottom wall of the storage unit 5 and moves up and down as a configuration for adjusting the water level of the storage unit 5. An overflow pipe 16 a that is slidably attached, a drive section 16 b that moves up and down the overflow pipe 16 a, and a supply section 16 c that supplies water to the storage section 5 may be provided. In this configuration, the position of the upper end opening of the overflow pipe 16a can be displaced by the drive unit 16b moving the overflow pipe 16a upward or downward. The maximum water level of the reservoir 5 is limited by the position of the upper end opening of the overflow pipe 16a. Therefore, by moving the overflow pipe 16a downward, it is possible to accurately lower the water level to a desired level. On the other hand, when raising the water level, the overflow pipe 16a is raised so that the position of the upper end opening of the overflow pipe 16a is higher than the target water level, and then water is supplied from the supply section 16c to the storage section 5. Good.

  In the said embodiment, the adjustment part 7 has the structure which adjusts the water level of the storage part 5 in order to adjust the ratio R of the part in which the heat generating part 6 is immersed in the water W stored in the storage part 5 inside. However, the present invention is not limited to this. The adjustment part should just be the structure which can adjust the said ratio R. FIG.

  For example, as another modified example of the present invention, as shown in FIG. 9, the heating unit elevating unit 18 that moves the electric heating element 6 a of the heating unit 6 inside the storage unit 5 up and down may be provided. In this case, even if the water level of the storage unit 5 is constant, the electric heating element 6 a is moved up and down by the heating unit elevating unit 18, so that the electric heating element 6 a is immersed in the water W stored in the storage unit 5. It is possible to adjust the proportion R of the part.

  The heat generating unit 6 may be configured to generate heat inside the storage unit 5, and may be configured by a plurality of electric heating elements 6a.

1 Environmental Test Equipment 2 Chamber 2a Test Room 3 Refrigerator (Air Conditioning Unit)
4 Temperature / Humidity Adjuster 6 Heating Unit 6a Electric Heating Element 7, 16 Adjustment Unit 13 Temperature Detection Unit 14 Humidity Detection Unit 15 Control Unit

Claims (7)

A temperature and humidity controller that adjusts the temperature and humidity of the target space,
A reservoir capable of storing water; and
A heat generating part that is housed inside the storage part and generates heat inside the storage part,
An adjusting unit that adjusts a ratio of a portion of the heat generating unit that is immersed in water stored in the storing unit;
A control unit that controls the adjustment unit so that the ratio changes;
The temperature and humidity controller equipped with. The adjustment unit has a configuration for adjusting the water level of the storage unit to adjust the ratio,
The temperature / humidity regulator according to claim 1. The control unit controls the heat generating unit to change the amount of heat generated by the heat generating unit.
The temperature / humidity adjuster according to claim 1 or 2. A temperature detection unit for detecting the temperature of air in the target space;
The control unit controls the heat generating unit to change the amount of heat generated by the heat generating unit based on the temperature of the air.
The temperature / humidity adjuster according to claim 3. A humidity detector for detecting the humidity of the air in the target space;
The control unit controls the adjustment unit to change the ratio based on the humidity of the air detected by the humidity detection unit.
The temperature / humidity adjuster according to any one of claims 1 to 4. A temperature detector for detecting the temperature of air in the target space;
A humidity detector for detecting the humidity of the air in the target space,
The ratio of the output of the part not immersed in water in the heat generating part required for heating the air based on the temperature detected by the temperature detecting part to the maximum output of the whole heat generating part is the heating output D%, In the case where the ratio of the output of the part immersed in water in the heat generating part required for air humidification based on the humidity detected by the humidity detecting part to the maximum output of the heat generating part is the humidified output W% ,
The output H% of the heating part is
When D + W ≦ 100, H = (D + W)%
When D + W> 100, H = 100%
The control unit controls the output H of the heat generating unit,
The temperature / humidity regulator according to claim 1 or 2. A test chamber in which the sample is stored, the target space;
An air conditioning unit for adjusting the temperature of the air in the test chamber;
The temperature and humidity regulator according to any one of claims 1 to 6, which adjusts the temperature and humidity of air that has been temperature-adjusted in the air conditioning unit;
Environmental testing equipment equipped with.

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