JP7387576B2 - Fog environment forming device and fog environment forming method - Google Patents

Description

The present invention relates to a fog environment forming device and a fog environment forming method.

Conventionally, as described in Patent Document 1, a device for forming a fog environment indoors is known.

Patent Document 1 describes an environmental test chamber, a two-fluid nozzle that sprays water particles into the environmental test chamber, an air compressor that generates air to be supplied to the two-fluid nozzle, and an air compressor that generates air that is supplied to the two-fluid nozzle. An environmental test device is described that includes a water tank for storing water. In this device, by spraying water particles from a two-fluid nozzle when the humidity in the environmental test chamber is 100%, the water particles are suspended in the air and a mist is formed. In addition, the environmental test chamber is equipped with an air outlet for introducing humidified outside air, and by adjusting the amount of ventilation with the outside air and the amount of water sprayed from the two-fluid nozzle, The fog density is kept constant.

Japanese Patent Application Publication No. 11-51823

In Patent Document 1, the fog concentration in the environmental test chamber is adjusted by introducing outside air, so the fog concentration can be kept constant, but the temperature inside the environmental test chamber fluctuates due to the influence of the outside air temperature. That is inevitable.

The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a fog environment forming device and a fog environment forming method that can adjust indoor fog concentration while suppressing indoor temperature fluctuations. .

A fog environment forming device according to one aspect of the present invention includes: a humidifying unit that humidifies a room; a storage unit that stores correlation data between temperature and humidity in the room; and values related to fog concentration; an input section for inputting a target value of a concentration-related value; a calculation section for calculating a target value for the indoor humidity based on the target value input to the input section and the correlation data; and the calculation section. and a humidification control section that controls the operation of the humidification section based on the target value calculated by.

This fog environment forming device calculates the target value of the indoor humidity corresponding to the target value of the indoor temperature and fog concentration related value based on the correlation data between the indoor temperature and humidity and the fog concentration related value, and By controlling the humidifier based on the target value of , the indoor fog density can be adjusted. Therefore, there is no need to introduce outside air into the room when adjusting the indoor fog density, and the fog density can be adjusted while suppressing indoor temperature fluctuations. Furthermore, since the fog density in the room is indirectly adjusted through humidity control without directly monitoring it, there is no need to install a visibility meter indoors.

As the "fog density related value", indoor visibility distance, illuminance attenuation rate, transmittance, etc. can be adopted. Further, the term "fog" in the present invention includes mist (visibility is 1 km or more and less than 10 km).

In the fog environment forming device, the humidifying section may include a heating type humidifier and a non-heating type humidifier.

According to this configuration, compared to the case where only a heating type humidifier is used, it is possible to suppress the amount of sensible heat generated when increasing indoor humidity, and therefore it is possible to suppress a rise in indoor temperature.

In the fog environment forming device, the humidification control unit controls the non-heating type humidification based on the output of the heating type humidifier or the humidity in the room being equal to or higher than a reference value while the heating type humidifier is in operation. You may activate the device.

If you try to raise the indoor humidity to the target value using only a heating humidifier, the indoor temperature will rise due to the heat generated by the heating humidifier. In this case, it is necessary to increase the capacity of the refrigerator in order to suppress the rise in indoor temperature, and as a result, the dehumidification capacity of the refrigerator also increases, making it difficult to efficiently increase the indoor humidity. On the other hand, by activating both the heating type humidifier and the non-heating type humidifier at the timing when the output of the heating type humidifier or the indoor humidity exceeds the standard value, it is possible to efficiently increase the indoor humidity. It becomes possible.

In the fog environment forming device, the humidification control section may reduce the output of the heating type humidifier after activating the non-heating type humidifier.

According to this configuration, the amount of heat from the heating type humidifier can be suppressed, and the rise in indoor temperature can be suppressed more reliably.

A method for forming a fog environment according to another aspect of the present invention is a method for forming a fog environment indoors, which includes the steps of: setting target values for the indoor temperature and fog concentration-related values; obtaining a target value for the humidity in the room based on a target value for the concentration-related value and correlation data between temperature and humidity in the room and fog density-related values investigated in advance; and a target value for the humidity in the room. controlling the humidity in the room based on the method.

According to this method, a target value of indoor humidity corresponding to the target value of indoor temperature and fog density-related value is obtained based on correlation data between indoor temperature, humidity, and fog density-related value, and By controlling the indoor humidity based on the target value, the indoor fog density can be adjusted. Therefore, there is no need to introduce outside air into the room when adjusting the indoor fog density, and the fog density can be adjusted while suppressing indoor temperature fluctuations. Furthermore, since the fog density in the room is indirectly adjusted through humidity control without directly monitoring it, there is no need to install a visibility meter indoors.

As is clear from the above description, according to the present invention, it is possible to provide a fog environment forming device and a fog environment forming method that can adjust indoor fog concentration while suppressing indoor temperature fluctuations.

1 is a diagram schematically showing the configuration of a fog environment forming device according to Embodiment 1 of the present invention. It is a graph showing the relationship between relative humidity and illuminance attenuation rate. 1 is a flowchart for explaining a fog environment forming method according to Embodiment 1 of the present invention. It is a flowchart for explaining the fog environment formation method concerning Embodiment 2 of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a fog environment forming device and a fog environment forming method according to an embodiment of the present invention will be described in detail based on the drawings.

(Embodiment 1)
<Fog environment forming device>
First, the configuration of a fog environment forming apparatus 100 according to Embodiment 1 of the present invention will be described based on FIGS. 1 and 2. The fog environment forming device 100 is a device that generates fog within the test chamber 11, and controls the fog density within the test chamber 11 by controlling the relative humidity within the test chamber 11. As shown in FIG. 1, the fog environment forming device 100 includes a test chamber 18, a blower 13, a heater 1, a refrigerator including an evaporator 17 and a compressor 16, a humidifier 2, and a controller 4. Equipped with.

The test chamber 18 consists of a heat insulating wall, and its inner surface is covered with a stainless steel plate or the like. Inside the test chamber 18, a test chamber 11 and an air-conditioned room 12 are provided. The test chamber 11 is a space in which a specimen (not shown) is installed, and is partitioned from the air-conditioned room 12 by a wall 18a. Note that since a hole (not shown) is formed in the wall of the test tank 18 to communicate the internal space and the external space, the inside of the test tank 18 is at atmospheric pressure.

As shown in FIG. 1, an air outlet 11b for blowing out conditioned air from the air-conditioned room 12 to the test chamber 11 is provided at the top of the wall 18a, and a blow-off port 11b is provided at the bottom of the wall 18a for blowing out conditioned air from the test chamber 11 to the test chamber 11. 12 is provided with a suction port 11a for sucking conditioned air. In the test chamber 11, an outlet temperature sensor 14A and an outlet humidity sensor 15A are installed near the outlet 11b, respectively. Further, in the test chamber 11, a suction side temperature sensor 14B and a suction side humidity sensor 15B are installed near the suction port 11a, respectively. The blowout side temperature sensor 14A detects the temperature of the conditioned air blown out from the blowout port 11b, while the suction side temperature sensor 14B detects the temperature of the conditioned air sucked in from the suction port 11a. The blowout side humidity sensor 15A detects the relative humidity of the conditioned air blown out from the blowout port 11b, while the suction side humidity sensor 15B detects the relative humidity of the conditioned air sucked in from the suction port 11a. These detection data are transmitted from each sensor to the control unit 4.

The blower 13 is a fan for circulating conditioned air between the test chamber 11 and the air conditioned room 12, and is installed in the upper part of the air conditioned room 12 (at a position facing the air outlet 11b). By operating the blower 13, a circulating flow is formed in which conditioned air flows downward in the test chamber 11 and conditioned air flows upward in the air conditioned room 12.

The heater 1 is a heater for heating conditioned air, and is installed upstream of the blower 13 in the air conditioned room 12 . Note that upstream and downstream in this specification are based on the flow direction of conditioned air (the direction indicated by the arrow in FIG. 1).

In addition to the evaporator 17 and compressor 16, the refrigerator further includes a condenser and an expansion valve (not shown), and these devices are connected by a refrigerant circuit. The evaporator 17 is a heat exchanger (cooler) that cools the conditioned air by exchanging heat between the refrigerant and the conditioned air and evaporating the refrigerant. is set up.

The humidifier 2 is for humidifying the inside of the test chamber 11. The humidifier 2 in this embodiment includes a heating type humidifier 3 and a non-heating type humidifier 5. The heating type humidifier 3 generates heat when humidifying conditioned air, while the non-heating type humidifier 5 does not generate heat when humidifying conditioned air. As shown in FIG. 1, in this embodiment, a heating type humidifier 3 is installed in the lower part of the air conditioned room 12 (upstream of the evaporator 17), and a non-heating type humidifier 5 is installed in the air conditioned room 12. It is installed upstream of the blower 13 and downstream of the heater 1. However, the arrangement of the humidifier 2 is not limited to this, and the heating type humidifier 3 may be installed downstream of the evaporator 17, for example.

The heating type humidifier 3 is, for example, a bread-dish type humidifier, and includes an evaporating dish 3b in which humidifying water is collected, and a humidifying heater 3a installed in the evaporating dish 3b. By heating and evaporating the humidifying water by the humidifying heater 3a, the conditioned air sucked into the air-conditioned room 12 from the suction port 11a is humidified. At this time, the temperature of the conditioned air increases due to the heat generated from the humidifying heater 3a. Note that the heating type humidifier 3 may be of a boiler type.

The non-heating type humidifier 5 is, for example, an ultrasonic humidifier, and further humidifies the conditioned air after being humidified by the heating type humidifier 3. The non-heating type humidifier 5 emits atomized water droplets toward the conditioned air, and the conditioned air is cooled by the heat of vaporization when the water droplets evaporate. Note that, unlike the heating type humidifier 3, the output of the non-heating type humidifier 5 is not controlled. That is, the output of the non-heating humidifier 5 is constant, and a constant amount of water droplets are emitted toward the conditioned air.

The control unit 4 is a computer that controls various operations of the fog environment forming device 100 (operations of the blower 13, heater 1, refrigerator, humidifier 2, etc.), and includes a reception unit 21, an input unit 22, and a storage unit. 24, a calculation section 23, a determination section 25, and a humidification control section 26. The reception unit 21, the calculation unit 23, the determination unit 25, and the humidification control unit 26 are functions executed by a central processing unit (CPU) of the computer that constitutes the control unit 4. The input unit 22 is configured by an input device such as a touch panel, for example. The storage unit 24 is composed of a storage device such as a memory.

The receiving unit 21 receives detection data transmitted from each sensor (the blowout side temperature sensor 14A, the blowout side humidity sensor 15A, the suction side temperature sensor 14B, and the suction side humidity sensor 15B). The input unit 22 is for inputting target values of temperature and fog concentration related values in the test chamber 11. In this embodiment, the fog density related value is the visibility distance within the test chamber 11.

The storage unit 24 stores correlation data between the temperature and relative humidity in the test chamber 11 and fog density related values (for example, illuminance attenuation rate). The graph in FIG. 2 is an example of this correlation data, and shows the relationship between relative humidity (horizontal axis) and illuminance attenuation rate (vertical axis) at a given temperature. The illuminance attenuation rate is expressed as 1 minus the transmittance, and the transmittance is the ratio of the received light intensity to the projected light intensity in measurement using a transmittance meter (visibility meter). Illumination attenuation rate or transmittance can be converted into visibility distance. That is, as the illumination attenuation rate increases, the visibility distance decreases, and as the transmittance decreases, the visibility distance decreases.

As shown in FIG. 2, as the relative humidity increases, the illuminance attenuation rate increases (the visibility distance decreases). The correlation between relative humidity and illuminance attenuation rate differs depending on the temperature. For this reason, graphs and data tables showing the correlation between relative humidity and illuminance attenuation rate are prepared for each temperature, and these data are stored in the storage unit 24.

The calculation unit 23 calculates a target value of the relative humidity in the test chamber 11 based on the target values of the temperature and visibility distance in the test chamber 11 input to the input unit 22 and the correlation data stored in the storage unit 24. Calculate. Specifically, the calculation unit 23 first selects data corresponding to the target value of the temperature in the test chamber 11 from among the data stored in the storage unit 24 . That is, data indicating the correlation between the relative humidity and the illuminance attenuation rate at the target temperature value is selected. Next, the calculation unit 23 converts the target value of the visibility distance within the test chamber 11 into a target value of the relative humidity within the test chamber 11 based on the selected data. Specifically, the target value of visibility distance is first converted into an illumination attenuation rate, and the target value of relative humidity is obtained based on the converted illuminance attenuation rate and the selected correlation data.

Further, the calculation unit 23 calculates the estimated value of the relative humidity in the central part of the test chamber 11 in the following manner. First, the calculation unit 23 calculates the amount of moisture in the conditioned air in the test chamber 11 based on the detection data of the outlet temperature sensor 14A and the outlet humidity sensor 15A received by the reception unit 21. On the other hand, the calculation unit 23 calculates the estimated value of the temperature in the central part of the test chamber 11 as an average value based on the detection data of the blowout side temperature sensor 14A and the suction side temperature sensor 14B. Then, the calculation unit 23 calculates the estimated value of the relative humidity in the central part of the test chamber 11 based on the calculated moisture content and the estimated temperature value. Hereinafter, this estimated value will be explained as a measured value of the relative humidity in the test chamber 11.

The determination unit 25 compares the target value of relative humidity calculated by the calculation unit 23 with the measured value of relative humidity in the test chamber 11, and determines the magnitude relationship between them. Information on this determination result is transmitted to the humidification control section 26.

The humidification control section 26 controls the operation of the humidification section 2 based on the target value of the relative humidity in the test chamber 11 calculated by the calculation section 23 . Specifically, the humidification control unit 26 adjusts the output of the humidification heater 3a of the heating type humidifier 3 so that the measured value of relative humidity in the test chamber 11 approaches its target value.

<Fog environment formation method>
Next, the fog environment forming method according to this embodiment will be explained according to the flowchart of FIG. 3. This method is a method of forming a fog environment within the test chamber 11, and is performed using the control unit 4.

First, target values for the temperature and visibility distance in the test chamber 11 are set (step S10). In step S<b>10 , target values for the temperature in the test chamber 11 and the visibility distance are input to the input unit 22 . The temperature target value is set, for example, in the range of 5 to 25° C., and the visibility distance target value is set, for example, to 10 m.

Next, a target value of relative humidity in the test chamber 11 is set (step S20). In this step S20, the target values of the temperature and visibility distance in the test chamber 11 set in step S10 and the temperature, relative humidity, and fog density related values (for example, illuminance attenuation rate) in the test chamber 11 investigated in advance are determined. A target value of relative humidity in the test chamber 11 is obtained based on the correlation data.

Specifically, first, among the correlation data between the temperature, relative humidity, and fog concentration related values in the test chamber 11 stored in the storage unit 24, the correlation data corresponding to the temperature target value set in step S10 is selected. Next, based on the selected correlation data, the target value of the visibility distance in the test chamber 11 set in step S10 is converted into the target value of the relative humidity in the test chamber 11. Specifically, the target value of the visibility distance is converted into an illuminance attenuation rate, and the target value of the relative humidity in the test chamber 11 is derived based on the converted value and the selected correlation data. This target value of relative humidity is calculated with an accuracy of, for example, 0.1%, and is within a range of 90.0% or more and less than 100.0%.

Next, the humidity in the test chamber 11 is controlled based on the target value of relative humidity in the test chamber 11 obtained in step S20 (steps S30 to S60).

First, in step S30, the humidification control section 26 operates the humidification heater 3a of the heating type humidifier 3. As a result, the humidifying water in the evaporating dish 3b evaporates into water vapor, and the water vapor mixes with the conditioned air circulating in the test chamber 18, thereby increasing the humidity in the test chamber 11. The humidification control unit 26 gradually increases the output of the humidification heater 3a so that the measured value of relative humidity in the test chamber 11 approaches its target value. Note that at this stage, the non-heating humidifier 5 is in an inactive state.

The humidification control unit 26 operates the non-heating type humidifier 5 based on the fact that the output of the heating type humidifier 3 becomes equal to or higher than the reference value while the heating type humidifier 3 is in operation. Further, after operating the non-heating type humidifier 5, the humidification control unit 26 lowers the output of the heating type humidifier 3. Specifically, the details are as follows.

First, the determining unit 25 determines whether the output of the humidifying heater 3a of the heating type humidifier 3 has reached a reference value (step S40). Then, when it is determined that the heater output has reached the reference value (YES in step S40), the humidification control unit 26 operates the non-heating type humidifier 5 (step S50), and the heating type humidifier 3 is activated. The output of the humidifying heater 3a is lowered (step S60). At this time, the non-heating type humidifier 5 may be operated after lowering the output of the humidifying heater 3a, or both may be operated at the same timing. On the other hand, if it is determined that the output of the humidifying heater 3a has not reached the reference value (NO in step S40), the non-heating type humidifier 5 does not operate and only the heating type humidifier 3 operates and the humidifying heater The state in which the output of 3a is gradually increased continues. Note that the non-heating humidifier 5 may be operated from the beginning together with the heating humidifier 3, or the output of the heating humidifier 3 may reach the reference value after the heating humidifier 3 has started operating. It may be activated before starting.

After step S60, the humidification control unit 26 continues to operate the non-heating type humidifier 5 and adjusts the output of the humidification heater 3a so that the measured value of relative humidity in the test chamber 11 approaches its target value. (increase/decrease heater output). While the humidity inside the test chamber 11 is controlled in this way, the temperature inside the test chamber 11 is also controlled. Specifically, the temperature in the test chamber 11 is determined based on the target value set in step S10 and the measured value (the average value of the detection data by the blow-out side temperature sensor 14A and the detection data by the suction-side temperature sensor 14B). Feedback controlled.

Thereby, the visibility distance within the test chamber 11 is controlled to a value corresponding to the target value of relative humidity, and a fog environment with a desired concentration can be formed within the test chamber 11. When the predetermined test termination conditions are met (YES in step S70), the operations of the heater 1, refrigerator, humidifier 2, and blower 13 are stopped, and the method ends.

Further, in step S10, when the target value of the visibility distance that is less than or equal to the visibility distance corresponding to 100% relative humidity is input to the input unit 22, the humidification control unit 26 maintains the relative humidity in the test chamber 11 at 100%. Adjust the output of the humidifier 2 (humidifier heater 3a) so that the At this time, the output of the humidifying heater 3a may be maintained at the maximum, but the output is not limited to this.

As described above, in the fog environment forming apparatus 100 according to the present embodiment, target values of the temperature and visibility distance in the test chamber 11 are determined based on correlation data between the temperature, relative humidity, and illumination attenuation rate in the test chamber 11. By calculating the target value of the relative humidity in the corresponding test chamber 11 and controlling the humidifier 2 based on the target value of the relative humidity, the visibility distance in the test chamber 11 is adjusted to the target value. Therefore, there is no need to introduce outside air into the test chamber 11 when adjusting the visibility distance within the test chamber 11, and the visibility distance (fog density) can be adjusted while suppressing temperature fluctuations within the test chamber 11. . Moreover, since the visibility distance within the test chamber 11 is indirectly adjusted by humidity control without directly monitoring the visibility distance, there is no need to install a visibility meter within the test chamber 11. Therefore, there is no problem that the light from the visibility meter is reflected by the inner surface (stainless steel plate) of the test chamber 11 or the specimen, and it is also possible to control the visibility distance to be larger than the size of the test chamber 18.

(Embodiment 2)
Next, a fog environment forming device and a fog environment forming method according to Embodiment 2 of the present invention will be described based on the flowchart of FIG. 4. Embodiment 2 is basically the same as Embodiment 1, but the timing at which the non-heating humidifier 5 is activated is different. Hereinafter, only the points different from the first embodiment will be explained.

The flowchart in FIG. 4 corresponds to the flowchart in FIG. 3, and is basically the same as the flowchart in FIG. 3 except for step S41. That is, steps S11 to S31 and S51 to S71 in FIG. 4 are the same as steps S10 to S30 and S50 to S70 in FIG. 3.

In the second embodiment, the humidification control unit 26 operates the non-heating humidifier 5 based on the fact that the relative humidity in the test chamber 11 becomes equal to or higher than the reference value while the heating humidifier 3 is in operation. That is, in step S41, the determination unit 25 determines whether the measured value of the relative humidity in the test chamber 11 has reached the reference value. This reference value is a value smaller than the target value of relative humidity. Then, when it is determined that the measured value has reached the reference value (YES in step S41), the humidification control unit 26 operates the non-heating humidifier 5 (step S51), and the heating type humidifier 3 The output of the humidifying heater 3a is lowered (step S61). On the other hand, if it is determined that the measured value of relative humidity in the test chamber 11 has not reached the reference value (NO in step S41), the non-heating humidifier 5 does not operate and only the heating humidifier 3 operates. The operating state continues.

When attempting to raise the relative humidity in the test chamber 11 to the target value using only the heating type humidifier 3, the conditioned air is heated by the heat generated from the humidifying heater 3a, and the temperature in the test chamber 11 increases. In this case, it is necessary to increase the capacity of the refrigerator to suppress the temperature rise in the test chamber 11, which also increases the dehumidifying capacity of the refrigerator, making it difficult to efficiently increase the humidity in the test chamber 11. Become. In contrast, by operating both the heating type humidifier 3 and the non-heating type humidifier 5 and lowering the heater output of the heating type humidifier 3 at the timing when the relative humidity in the test chamber 11 becomes equal to or higher than the reference value, The humidity within the test chamber 11 can be increased efficiently. This effect can be similarly obtained even when the non-heating type humidifier 5 is activated and the heater output of the heating type humidifier 3 is lowered at the timing when the output of the heating type humidifier 3 exceeds the reference value as in the first embodiment. It will be done.

(Embodiment 3)
Next, the configuration of a fog environment forming device according to Embodiment 3 of the present invention will be described. Embodiment 3 is basically the same as Embodiment 1, except that the non-heating humidifier 5 is not provided. Hereinafter, only the points different from the first embodiment will be explained.

In the third embodiment, the humidifying section 2 includes only the heating type humidifier 3 and does not include the non-heating type humidifier 5. Therefore, the humidity in the test chamber 11 is adjusted only by the heating type humidifier 3. Specifically, after calculating the target value of relative humidity in steps S10 and S20 in FIG. 3, the relative humidity in the test chamber 11 is adjusted to that value by adjusting the output of the humidifying heater 3a based on the target value. Controlled to approach the target value. In this configuration, since the non-heating humidifier 5 is omitted, the device configuration can be further simplified.

(Other embodiments)
Other embodiments of the invention will now be described.

In the first embodiment, the case where the target value of the visibility distance is input to the input unit 22 has been described as an example, but instead of this, the target value of the illuminance attenuation rate or the transmittance may be input to the input unit 22.

In the correlation data stored in the storage unit 24, visibility distance or transmittance may be used instead of the illuminance attenuation rate. Further, in the correlation data, absolute humidity may be used instead of relative humidity. In this case, the calculation section 23 calculates the target value of the absolute humidity in the test chamber 11, and the humidification control section 26 controls the operation of the humidification section 2 based on this.

In Embodiment 1, a bread-dish type humidifier is used as the heating type humidifier 3, and an ultrasonic humidifier is used as the non-heating type humidifier 5. However, the types of humidifiers are different from these. Not limited. For example, a spray type humidifier (two-fluid nozzle) may be used as the non-heating type humidifier. In this case, a water supply section (including tanks, piping, pumps, valves, etc., not shown) that supplies water to the two-fluid nozzle, and an air supply section (including an air compressor, piping, and valves, not shown) that supplies compressed air to the two-fluid nozzle. (not shown) are provided, respectively. Preferably, the particle size of the water droplets sprayed from the nozzle is adjusted to be constant by adjusting the water temperature, water amount, air pressure, air temperature, etc.

In the first embodiment, an example has been described in which the humidity is controlled using the estimated value of the relative humidity in the central part of the test chamber 11, but the present invention is not limited thereto. Humidity control may be performed by comparing the detection data of the blow-out side humidity sensor 15A with a target value, or humidity control may be performed by comparing the detection data of the suction-side humidity sensor 15B with a target value. Moreover, humidity control may be performed by comparing the average value of the detection data of the blow-out side humidity sensor 15A and the detection data of the suction-side humidity sensor 15B with a target value.

The heating type humidifier is not limited to the case where the evaporating dish 3b is installed inside the test tank 18 (air-conditioned room 12), and for example, steam generated in a boiler (not shown) installed outside the test tank 18. A configuration may be adopted in which the air is guided into the air-conditioned room 12 using piping or the like.

In the first embodiment, the case where one non-heating humidifier 5 is installed has been described as an example, but a plurality of non-heating humidifiers 5 may be installed.

In Embodiment 1, the case where the fog environment forming device is used for an environmental test has been described as an example, but the fog environment forming device may be used in other facilities other than the test device.

The embodiments disclosed herein are illustrative in all respects and should be understood not to be restrictive. The scope of the present invention is indicated by the claims rather than the above description, and it is intended that all changes within the meaning and range equivalent to the claims are included.

2 humidification unit 3 heating type humidifier 5 non-heating type humidifier 11 test chamber 22 input unit 23 calculation unit 24 storage unit 26 humidification control unit 100 fog environment forming device

Claims (5)

A humidifier that humidifies the room;
a storage unit storing correlation data between the indoor temperature and humidity and fog density related values;
an input unit for inputting target values of the indoor temperature and fog density related values;
a calculation unit that calculates a target value of the indoor humidity based on the target value input to the input unit and the correlation data;
A fog environment forming device, comprising: a humidification control section that controls operation of the humidification section based on the target value calculated by the calculation section. The fog environment forming device according to claim 1, wherein the humidifying section includes a heating type humidifier and a non-heating type humidifier. The humidification control unit operates the non-heating type humidifier based on the output of the heating type humidifier or the humidity in the room being equal to or higher than a reference value while the heating type humidifier is in operation. 2. The fog environment forming device according to 2. The fog environment forming device according to claim 3, wherein the humidification control unit lowers the output of the heating type humidifier after activating the non-heating type humidifier. A method for forming a fog environment indoors, the method comprising:
setting target values for the indoor temperature and fog density related values;
obtaining a target value of the indoor humidity based on the target value of the indoor temperature and fog concentration related value and pre-investigated correlation data between the indoor temperature and humidity and the fog concentration related value;
A method for forming a fog environment, the method comprising: controlling the humidity in the room based on a target value for the humidity in the room.