JP3519380B2 - Environmental test equipment with downflow cooler - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises an evaporator constituting a refrigerator as a cooler and a steam humidifier humidifier so that the circulating air cooled by the cooler is humidified by the steam. The present invention relates to an environmental test device, and more particularly to improvement of thermal performance and miniaturization of a refrigerator and a humidifier in a device having high temperature and high humidity conditions.

[0002]

2. Description of the Related Art An environment tester is capable of handling a wide range of temperature and humidity conditions to be tested from high temperature and high humidity conditions to low temperature and low humidity conditions, and has a large cooling capacity. The evaporator of the machine is used as a cooler. On the other hand, a sample including an electric / electronic component such as a semiconductor is often tested in an operating state under a high temperature and high humidity environment. At this time, the sample becomes a heat load. Further, there is a load to be cooled but no load to be dehumidified.

However, when the high-temperature and high-humidity air is cooled by the refrigerator, unnecessary dehumidification is performed, and re-humidification is necessary to make up for it, which causes wasteful energy consumption. However, in the environment test device dedicated to high temperature and high humidity, there is a problem that the refrigerator and the humidifier are large and the device cost is high.

In this case, in addition to the original steam generating type humidifier, a humidifying function and a latent heat cooling function are provided.
An apparatus is also known in which an ultrasonic auxiliary humidifier that sprays and mixes minute water droplets into the circulating air is provided to deal with the above test conditions.

However, the provision of the auxiliary humidifier results in the addition of operating equipment, which complicates the apparatus configuration and
There is a problem that it is difficult to select the number of operating units, combined use with the main humidifier, and operating conditions such as switching timing.

On the other hand, in the environmental test apparatus, as shown in FIG. 7, for example, an air-conditioning room 8 is provided adjacent to the test room 6, and test air whose temperature and humidity are adjusted is circulated between these rooms. In this way, the cooler 2 composed of the evaporator is arranged in the air-conditioning chamber 8 to form an ascending flow type circulation system in which the circulating air flows from the lower side to the upper side of the cooler 2 (for example, Japanese Patent Laid-Open Publication No. H11-111). (See JP-A-141955).

[0007]

The conventional environmental testing apparatus having such a cooler section upflow circulation system does not bring the moisture load dehumidified by the cooler to the upstream side of the cooler.
This is a device particularly suitable for low-humidity operation that places importance on the dehumidifying function of the refrigerator. However, when there are operating conditions that require cooling at high temperature and high humidity, the water that has condensed and dropped during cooling in the cooler is re-evaporated by the circulating air and brought into the cooler, and this water load is included. Therefore, it was found that excessive dehumidification was performed in the cooler and the amount of re-humidification also increased, and this point was also a factor that increased cooling and humidification energy.

Therefore, the present invention solves the above problems in the prior art, optimizes the dehumidifying action of the cooler under high temperature and high humidity operating conditions with a simple structure, and reduces energy consumption during operation, An object of the present invention is to provide an environmental testing device that can also downsize a refrigerator and a humidifier.

[0009]

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention according to claim 1 is provided with an evaporator constituting a refrigerator as a cooler and a steam humidifier humidifier. In an environmental test device configured to humidify circulating air cooled in a cooler with the steam, a downward flow path that allows the circulating air to pass from above the cooler to a lower side, and the downward flow path is reversed. Turned up
Part and out of the cooler in the inverted position
A cloth provided to bring the condensed water into contact with the circulating air.
And a moisture recovery guide made of a porous material .

The invention according to claim 2 is an evaporator which constitutes a refrigerator.
Equipped with a steam generator as a cooler and a steam humidifier
The circulating air cooled by the cooler is added by the steam.
In an environmental testing device that is adapted to be moistened, the circulating air
Downward flow which enables the passage of the cooling water from above the cooler to below.
And wherein the road, the circulating air and a rising flow path to allow passage from below to above the cooler, that the said descending flow path and the upward flow path provided a damper that allows switching To do.

The invention of claim 3 is an evaporator which constitutes a refrigerator.
Equipped with a steam generator as a cooler and a steam humidifier
The circulating air cooled by the cooler is added by the steam.
In an environmental testing device that is adapted to be moistened, the circulating air
Downward flow which enables the passage of the cooling water from above the cooler to below.
A passage, a downstream cooler provided on the downstream side of the downward flow path, and an upward flow path that allows the circulating air to pass from below to above the downstream cooler. .

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT FIG. 1 has a downflow path of the present invention.
1 shows an example of the overall configuration of an environmental testing device to which the structure described above is applied.
The environment test apparatus of this example includes an evaporator constituting the refrigerator 1 as a cooler 2 and a humidifier 3, and the circulating air cooled by the cooler 2 is humidified by the humidifier 3 with a humidifying nozzle 31.
It is a device that humidifies by releasing water vapor from
As a structure having a downward flow path that allows circulating air to pass from above the cooler 2 to below, in the present example, a dedicated downward air passage 4 is provided as shown by the arrow in the figure. .

This environmental testing device includes, as usual components, an insulating wall 5, a test chamber 6, an air conditioning chamber 8 arranged adjacent to the test chamber 6 by a partition plate 7, the cooler 2 and the like. It is provided with a heater 9, a blower 10, temperature and humidity sensors 11 and 12, an operation control panel 14 which is provided with a temperature and humidity setting unit 13 and only a part of which is illustrated, and the like. Refrigerant having a temperature of, for example, about −20 ° C. is supplied to the cooler 2 from a refrigerating circuit (not shown) including a compressor, a condenser, an electronic expansion valve, and the like.

The above-mentioned environmental test device is operated in the following manner and exhibits its effects. A sample W such as an electric / electronic component that generates a heat load is placed in the test chamber 6, the refrigerator 1, the humidifier 3, the heater 9, the blower 10 and the like are operated, and the temperature ts to be tested and the relative humidity φs (hereinafter Simply "humidity"
Is set by the setting unit 13 of the operation control panel 14, the temperature and humidity sensors 11 and 12 detect the actual temperature tp and the humidity φp of the circulating air, and the detected value becomes the set value. Controlled ts and φs
Is circulated and supplied to the sample W.

In such an operation, when the circulating air is subjected to a high temperature and high humidity condition and a test is performed in which a driving power source is applied to the sample W to operate it, the sample W gives a heat generation load to the air conditioner. However, even under such operating conditions, according to the device of the present example to which the present invention is applied, energy-saving operation in which the capacity of the refrigerator is reduced and the humidification amount of the humidifier is reduced compared to the conventional device. You can

That is, the cooler 2 using the evaporator of the refrigerator
However, the sensible heat cannot be simply removed and the dehumidifying action is inevitably performed. However, according to the apparatus of this example, the heating load of the sample W is applied in the test chamber 6 and the temperature rises to the same absolute value. Since the circulating air whose relative humidity has dropped below the temperature flows into the cooler 2 as it is, in the cooler 2, the dehumidifying load added to the cooler at the inlet side of the cooler in the conventional device is applied. Since the amount of dehumidification of the cooler is reduced, part of the condensed water that is dehumidified and drops downward due to the action of gravity is added to the circulating air on the downstream side of the cooler 2 and conveyed, so Contrary to the device, this moisture is made available for humidification and the amount of steam for re-humidification by the humidifier 3 can be reduced. As a result, it is possible to reduce the generation capacity of the cooler and the humidifier, enable downsizing of the device, and save energy during operation.

FIG. 2 is a diagram showing a part of a moist air diagram showing changes in the state of circulating air in the apparatus of this example and the conventional apparatus. 3 and 8 schematically show the states of the moisture dehumidified by the respective coolers and the air flow. With reference to these drawings, the above-described effects of the present invention will be described in more detail by giving a concrete numerical example and comparing with a conventional device.

In the setting unit 13, for example, ts = t ₁ = 60
High-temperature and high-humidity conditions of ° C and φs = φ ₁ = 95% are given, and the circulating air under these conditions is blown out to the test chamber 6 by the blower as a test chamber inlet state and applied to the sample W. Figure 2
This position is shown on the moist air diagram of. Sample W
When the power is supplied to the
The temperature rises by 0 ° C., the relative humidity decreases, and the circulating air is discharged from the test chamber 6 at the test chamber outlet state of t ₂ = 70 ° C. and φ ₂ = about 52%. Since there is no moisture load in and out between and, the absolute humidity x is constant. Therefore, the temperature is 10 ° C. higher with a constant absolute humidity.

In the cooler section circulating air downflow type apparatus shown in FIG. 1 to which the present invention is applied, the circulating air is immediately cooled and dehumidified as it is from the above position, as indicated by the solid line in FIG. The state changes according to the high-temperature and low-humidity cooling line A to reach the cooler outlet state. At this time, as shown in FIG. 3, the condensed water droplets cooled by the cooler 2 and attached to the cooling pipes or fins thereof or the water droplets p formed by minute water droplets condensed in the air and having a certain size fall by gravity. At the same time, it is sent out from the cooler 2 to the lower side and the downstream side by the carrying force of the circulating air flow indicated by the arrow.

The direction of the state change line such as the high temperature and low humidity cooling line A in the cooler composed of the evaporator of the refrigerator is determined by the ratio of the latent heat load and the sensible heat load. That is, if the humidity is low and the latent heat load is relatively small, the sensible heat load is easy to take, and therefore the temperature is likely to drop, and there is a tendency for the state to change in the direction of a gentle slope on the wet air diagram, and conversely Is higher, the inclination tends to be larger. It is generally known that this state change is almost in the direction of drawing a tangent line to the illustrated saturation line L from the start point of the change. In this case, since the high-temperature low-humidity cooling line A changes from the initial position of, the line becomes a line with a moderate inclination and a slight inclination. And the position on this line is decided. It should be noted that the line L is a curve in which the inclination gradually decreases downward in the figure.

When the circulating air changes its state from the cooler 2 to the cooler 2, as described above, it is cooled and dehumidified, and the absolute humidity and the enthalpy decrease by xa and ha. Of these, the amount of decrease in absolute humidity xa is the amount of 0 minutes discharged from the cooler 2 as water droplets, where water vapor contained in the circulating air is partially cooled and condensed.

In this case, according to the apparatus of FIG. 1, as described above, the above-mentioned water content dropped by gravity from the cooler 2 is mixed into the circulating air, and a part of the water content is particularly small in diameter and lightweight. It will be transported with the circulating air. If the added water has the same temperature as the circulating air and exchanges heat with the circulating air during transport to re-evaporate, the circulating air will have an absolute humidity and a relative humidity from the cooler outlet state. As the temperature increases, the temperature decreases and the intermediate state is reached. This state change, since there is no out of heat, enthalpy constant, i.e. h ₄ = under h _3, x ₄ and phi ₄ are x ₃
And φ ₃ and t ₄ become smaller than t ₃ .

Due to the change from this, a moisture cooling effect and an intermediate humidifying effect on the circulating air are generated, and dehumidification for cooling in the cooler 2 is interrupted, so that the cooling amount in the cooler will be described later. Also, the amount of re-humidification in the humidifier will be reduced.

From the intermediate state, the humidifying nozzle 3 of the humidifier 3
When steam is added to the circulating air at 1, the temperature and humidity of the circulating air is readjusted to the final state and to the initial chamber inlet state. In this case, the humidifier 3 is usually 100
Since saturated steam having a calorific value of internal energy u = 640 kcal / kg at ℃ is generated, this steam imposes a moisture load on the circulating air and reheats it, so that the circulating air in the state of is brought to the state of. The amount of water entrained in the circulating air is finally 6 due to the superheat of the humidified steam.
The water vapor becomes 0 ° C., and the humidity condition together with the humidified water vapor is realized.

The change line B for humidifying and reheating until the state of is changed to the state of changing the amount of water vapor of u = 640 added to the circulating air having the constant temperature and humidity condition X at a constant amount. State X when circulating air reaches the final state
Is determined by the position of and the steam condition of u = 640, which is a humidified steam condition, and a slope parallel to the line M of U = 640 on the moist air diagram is taken as a constant direction from It is the line I have. Therefore, this curve B
Is a line that tends to decrease the humidity and temperature from the state of, and its direction is fixed.

From the above, the position of is the high temperature low humidity cooling line A
The position of being up is determined by the amount of associated water on the isenthalpic line from, that is, the line from to is of fixed direction and length, and the curve B
Since it became clear that the direction from the point is fixed, move the position on the curve A, slide the line segment-, and if the position of is on the curve B, the position of will be decided. Become. As a result, all the states of the circulating air of ----- are established.

Since the curve A is originally a line for cooling, it changes in the direction of lowering the temperature, and the curve B is a line for humidifying with steam having a high temperature, so it changes in the direction of increasing temperature. Therefore, the curves A and B are lines oriented in a direction toward each other. Therefore, the point is always present regardless of the size of the line segment.

In order to show a concrete example of the above-defined conditions and, it is necessary to estimate the amount of water taken in at the outlet of the cooler corresponding to the line segment. When the circulating air is in the condition of, the moisture content is about 0.3% of the absolute humidity, that is, Δx = 3 g / kg '(dry air), from the various measurement and calculation results in the actual device so far. It is estimated to be an amount that raises.

From the points thus determined, the cooling heat quantity of the cooler 2 and the humidification heat quantity of the humidifier 3 are calculated as follows: Enthalpy of each part (kcal / kg) Test chamber inlet state; .0 Same outlet state; 107.5 Cooler inlet state; 107.5 Cooler outlet state; 96.5 Humidifier inlet state; 96.5 Humidifier outlet state; 103.0 (Test chamber inlet state) Cooler 2 Cooling heat quantity ha =-= 107.5-96.5 = 11 Humidification heat quantity hb of humidifier 3 =-= 104.0-96.5 = 7.5 On the other hand, in the conventional device shown in FIG. The circulating air changes from the inlet state to the outlet state of the test chamber as shown by the solid line in FIG. 2, which is the same as in the apparatus of this example, but when it reaches the lower position on the inlet side of the cooler 2, it is shown in FIG. as,
The water drops p that are dehumidified by the cooler 2 and fall are brought into contact.
At this time, since the circulating air is heated by the heat of the sample, a part of the water droplets is re-evaporated and brought into the cooler 2 to increase the dehumidifying load.

Since the evaporation of water drops at this time is caused by the heat retained by the circulating air itself, it is carried out under isoenthalpy. Further, the increase in absolute humidity of the circulating air due to the evaporation of water droplets at this time is almost the same as that at the cooler outlet side in the apparatus of FIG. 1 though the conditions are different, and it is estimated that Δx ′ = 3 g / kg ′. . As a result, the circulating air enters the cooler 2 after undergoing an extra state change as indicated by 'in FIG.

In the cooler 2, the solid high temperature and low humidity cooling line A
Although the state change is similar to, but the state before change is different, that is, since the temperature is lower and the humidity is higher in the state of ′ than in the state of ′, the latent heat load is larger and the sensible heat is larger than that of line A. It becomes a line that tends to be difficult to take the load. Then, the temperature changes according to the low-temperature high-humidity cooling line C, which is a line having a larger inclination than the line A on the moist air diagram, and reaches the cooler outlet state '. Line C
Similarly to the line A, the tangent line is drawn to the saturation line L.

Since the circulating air discharged from the cooler 2 flows upward, it is not possible to add the condensing water droplets which fall like the device of FIG. 1 as a moisture load, and the humidifier 3 immediately starts. It will be humidified. That is, there is no change from to the intermediate state as shown by the solid line. As a result, the humidifying and cooling effects using condensed water droplets cannot be obtained,
The amount of dehumidification for cooling in the cooler 2 increases, and the amount of re-humidification increases accordingly. And in the humidifier 3,
As in the case of the solid line, the circulating air reaches the desired initial state on the humidifying and reheating change line B extending in the direction from ', but the amount of heat for humidification is large.

Calculation of the cooling heat amount of the cooler 2 and the humidification heat amount of the humidifier 3 in the conventional apparatus shown in FIG. 7 is as follows: Enthalpy of each part (kcal / kg) test chamber inlet state; .0 Same outlet state; 107.5 Cooler inlet state '; 107.5 Cooler outlet state'; 91.8 Humidifier inlet state '; 91.8 Humidifier outlet state; 103.0 (Test chamber inlet state) Cooling heat quantity of cooler 2 = '-' = 107.5-91.8 = 15.7 Humidification heat quantity of humidifier 3 =-'= 104.0-91.8 = 12.2 The result of this conventional device is It is as follows when compared with the above result of the apparatus of this example to which the present invention is applied: Conventional apparatus Apparatus of the present invention Energy saving rate Cooling heat amount of cooler 2 = 15.7 11 4.7 30% Humidification of humidifier 3 Heat quantity = 12.2 7.5 4.7 39% Total 27.9 8.5 9.4 34% As described above, if the present invention is applied, by using the condensed water generated in the cooler in combination with the characteristics on the moist air diagram, it is possible to significantly reduce energy consumption in the operation of the environmental test device. If the maximum capacity of the cooler and the humidifier is determined by the operating conditions such as the generation of heat load under high temperature and high humidity conditions, reduce the capacity of the refrigerator, the cooler and the humidifier, and The cost can be reduced.

As is clear from the above description, the difference in energy consumption between the device of the present invention and the conventional device is 3 g / kg ', and the values of Δx and Δx' are It depends on the inclination angle of the cooling / dehumidifying lines A and B in FIG. 2 based on the difference in the position of ′ changed by Δx ′. In this case, for example, in a device such as the device shown in FIG. 1 in which the downward air length of the outlet air passage of the cooler is long and condensed water is easily transported, Δx becomes large and the energy saving effect becomes large. Further, as will be described later, if the water recovery guide 41 is provided in the apparatus of FIG. 4A, Δx becomes large and the energy saving effect becomes large as well.

FIG. 4 (a) shows an example of an environment test apparatus to which the present invention is applied. In this device, a downward air passage 4 which is a downward flow path is provided at a lower position of the device, and is extended up to a reversed and upward portion. As a result, the circulating air can be blown into the test chamber 6 from above, as in the case of the conventional normal environment testing device. The inversion-type downward air passage 4 is provided with a water recovery guide 41 as shown, which is made of cloth or a suitable porous material . By doing so, the dew condensation water can be retained on the surface of the water content recovery guide 41 and efficiently contacted with the circulating air. as a result,
Promotes the cooling effect by re-humidification of water and vaporization of water,
The energy saving effect can be further improved. Also, the flow of wind can be made smooth and the flow resistance can be reduced.

FIG . 4 (b) shows an environmental test equipment to which the present invention is applied.
Another example of the arrangement will be shown. This equipment, in addition to the downward air passage 4 of the device of FIG. 1, have the upward air path 15 indicated by the two-dot chain line in FIG circulating air upflow paths to allow passage from below of the cooler 2 above However, a structure is provided in which dampers 16 and 17 for switching the upward air passage 15 and the downward air passage 4 are provided. The dampers 16 and 17 are usually manually or remotely operated, but are automatically operated in an apparatus for performing a temperature / humidity cycle test.

In the apparatus of this example, the dampers 16 and 17 are set to the positions indicated by the solid lines during the high humidity operation, and the downward path 4 is
To open. As a result, the energy saving operation described above can be performed. On the other hand, under the low-humidity operating condition, the dampers 16 and 17 are respectively set to the positions indicated by the two-dot chain line to open the upward air passage 15. As a result, no moisture load is brought into the circulating air after dehumidifying with the cooler 2,
The humidification control by the humidifier 3 ensures that the low humidity condition can be maintained.

FIG. 5 shows still another example of the air conditioner portion of the environment test apparatus to which the present invention is applied. The air conditioner portion of this example includes a downward air passage 4 and an upward air passage 15, which are configured to be switchable by four dampers 18 to 21. The air conditioner portion of the present example is disposed, for example, above or below the test chamber of the environmental test device. These dampers are also manually, remotely or manually operated.

In the apparatus of this embodiment, during high humidity operation, the dampers 18 and 21 are opened, the dampers 19 and 20 are closed, and the downward air passage 4 indicated by the solid arrow is opened. Further, at the time of low humidity operation, although not shown, the dampers 18 and 21 are closed and the dampers 19 and 20 are opened, and the upward air passage 1 indicated by the two-dot chain line arrow.
5 opens. As in the device of FIG. 5, energy saving operation can be performed under high humidity conditions, and this can be reliably controlled under low humidity conditions.

FIG. 6 shows still another example of the environment test apparatus to which the present invention is applied. The device of this example is in addition to the device of FIG.
Downstream cooler 2 provided downstream of the downward air passage 4
_2, and a upward-only air duct 22 upflow path that can pass through the circulating air from the bottom to the top of the cooler 2 _2. In this device, the cooler 2 of the device of FIG.
_It is provided as ₁ .

According to the apparatus of this example, the energy saving effect is obtained by using the cooler 2 ₁ during the high humidity operation, and the humidity control is performed by using the cooler 2 ₂ during the intermediate or low humidity operation. It is possible to effectively utilize as a cooler having a large cooling area by using both coolers 2 ₁ and 2 ₂ during the operation that secures the property and does not control the humidity. In the device of this example, the number of coolers is increased by one, but operating parts such as dampers are unnecessary.

[0042]

As described above , according to the present invention, the environment test apparatus has the downward flow path that allows the circulating air to pass from the upper side to the lower side of the cooler composed of the evaporator constituting the refrigerator,
Since the circulating air cooled by the cooler is humidified by the steam of the humidifier, when cooling the circulating air under high humidity conditions, it is condensed in the cooler in the same direction as the water dropped by gravity. Since the circulating air flows, the circulating air does not re-evaporate water and bring it into the cooler to increase the dehumidification load in the cooler.

Further, after the circulating air exits the cooler, a part of the condensed water falling from the cooler can be taken in and re-evaporated to give the circulating air a humidifying and cooling effect. Then, the circulating air is effectively sensible cooled, the dehumidifying amount for cooling in the cooler is reduced, and the humidifying amount for rehumidifying the circulating air that is inevitably excessively dehumidified in the cooler is also reduced. be able to.

[0044] As a result, reduces the driving energy of the cooler refrigerator comprising a normal power, it is possible to reduce the energy consumption for humidification. Therefore,
According to the first aspect of the present invention, by using the condensed water generated in the cooler in combination with the characteristics on the wet air diagram, it is possible to significantly save energy in the operation of the environmental test device. In addition, the capacity of the cooler and the refrigerator and the humidifier including the cooler can be reduced to reduce the device cost. In the invention of claim 1, the above basic
In addition to the mechanical effect, a moisture recovery guide with a predetermined configuration is provided.
Since it is provided, the condensed water is brought into contact with the circulating air to re-add moisture.
Energy-saving effect by promoting the cooling effect by humidification and moisture vaporization
Can be further improved. In addition, smooth the flow of wind
However, the flow resistance can be reduced.

According to the invention of claim 2, the above-mentioned basic
In addition to the effect , an ascending flow path that allows the circulating air to pass from the lower side to the upper side of the cooler is provided, and a damper that allows switching between this path and the descending flow path is provided. The above energy-saving operation effect can be obtained by opening the valve.On the other hand, under intermediate or low humidity operating conditions, the damper opens the upward flow path and brings the condensed water into the circulating air after exiting the cooler. By eliminating the above, it is possible to surely realize the middle and low humidity conditions by the humidification control by the humidifier 3.

According to the invention of claim 3, the above-mentioned basic
In addition to the effect , a downstream cooler is installed on the downstream side of the downward flow path, and an upward flow path that allows circulating air to pass through from below is provided, so a cooler in the downward flow path is used during high humidity operation. Energy saving effect is obtained, the humidity controllability is secured by using the downstream side cooler and the upflow path during the operation with intermediate humidity or low humidity, and the downflow path and the upflow path are provided during the operation without the humidity control. It is possible to use both of the above coolers and effectively use them as a cooler having a large cooling area. In this case, the number of coolers is increased by one, but the damper is not necessary and the number of operating parts can be reduced.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an example of the overall configuration of an environment test apparatus to which the present invention has been applied.

FIG. 2 is an explanatory diagram showing a state of circulating air during high-temperature and high-humidity operation of the above apparatus, in a moist air diagram.

FIG. 3 is an explanatory diagram showing a state in which condensed water generated by a cooler falls and a flow direction of circulating air.

4A and 4B are explanatory views showing another example of the environment test apparatus to which the present invention is applied.

FIG. 5 is an explanatory diagram showing still another example of the air conditioner portion of the environment test apparatus to which the present invention is applied.

FIG. 6 is an explanatory diagram showing still another example of the environment test apparatus to which the present invention is applied.

FIG. 7 is an explanatory diagram showing an example of the overall configuration of a conventional environment test apparatus.

FIG. 8 is an explanatory diagram showing a state in which condensed water generated by a cooler in the above apparatus falls and a flow direction of circulating air.

[Explanation of symbols]

1 refrigerator 2 cooler 3 humidifier 4 Downward air path (downward flow path) 15 Upward wind path (upflow path) 16-21 damper 22 Upward dedicated wind path (upstream flow path)

Claims (3)

(57) [Claims] 1. An environmental test apparatus comprising an evaporator constituting a refrigerator as a cooler and a steam humidifier humidifier to humidify the circulating air cooled by the cooler with the steam. A downward flow path that allows circulating air to pass downward from above the cooler, and an upward direction by reversing the downward flow path.
The part that has been
Is provided to bring the condensed water that has formed into contact with the circulating air.
And a moisture recovery guide made of a porous material, and an environmental testing device. 2. An evaporator constituting a refrigerator as a cooler
In addition to being equipped with a steam humidifier humidifier
The cooled circulating air was humidified with the steam.
In the environmental testing device, the circulating air can pass from above the cooler to below
A downward flow path for, the circulating air and a rising flow path to allow passage from below to above the cooler, to the said descending flow path and the upward flow path provided a damper that allows switching Environmental testing equipment characterized by. 3. An evaporator constituting a refrigerator as a cooler
In addition to being equipped with a steam humidifier humidifier
The cooled circulating air was humidified with the steam.
In the environmental testing device, the circulating air can pass from above the cooler to below
A downstream flow cooler provided downstream of the downstream flow cooler, and an upward flow flow path that allows the circulating air to pass from below to above the downstream cooler. Characteristic environmental test equipment.