JP6889679B2 - Temperature / humidity control device, control device, control method and control program - Google Patents

Description

The present invention relates to a temperature / humidity control device, a control device, a control method, and a control program for adjusting the temperature and humidity of air.

Conventionally, as described in Patent Document 1, the temperature for adjusting the humidity of the air is adjusted based on the difference between the relative humidity of the air and the set relative humidity detected by the relative humidity sensor while adjusting the temperature of the air. Humidity regulators are known.

Japanese Unexamined Patent Publication No. 7-218421

However, the relative humidity sensor detects different relative humidity depending on the temperature of the air even if the partial pressure of water vapor in the air is constant. Therefore, in the conventional temperature / humidity adjusting device, while the air temperature is adjusted to be the same as the set temperature, the relative humidity corresponding to the temperature of the air being adjusted and the temperature of the air being adjusted are supported. No constant setting The difference from the relative humidity is a difference that does not correspond to the temperature of the air being adjusted, and the humidity of the air is adjusted based on the difference. As a result, there is a risk that unnecessary humidification and dehumidification will be performed.

The present invention has been made in view of the above circumstances, and provides a temperature / humidity adjusting device, a control device, a control method, and a control program that can easily adjust the temperature and humidity of air by suppressing unnecessary humidification and dehumidification. The purpose is to provide.

The temperature / humidity adjusting device according to the present invention includes a temperature detecting unit that detects the temperature of air, a humidity detecting unit that detects the relative humidity of the air, an air conditioner that adjusts the temperature and humidity of the air, and the temperature detecting unit. while adjusting the temperature of the air by the air conditioner so that the detected temperature reaches the set temperature by, an air having a water vapor partial pressure of air in the same relative humidity as and set relative humidity at the same temperature and the set temperature calculating an adjustment set humidity is the relative humidity of the air at the same temperature as before Symbol detected temperature, as detected relative humidity by the humidity sensor becomes the adjustment set humidity, the adjustment of the humidity of the air by the air conditioner It is provided with a control unit for performing the operation.

Further, the control device according to the present invention is a temperature / humidity adjusting device including a temperature detecting unit for detecting the temperature of air, a humidity detecting unit for detecting the relative humidity of the air, and an air conditioner for adjusting the temperature and humidity of the air. The air temperature is adjusted by the air conditioner so that the temperature detected by the temperature detection unit becomes the set temperature, and the temperature is the same as the set temperature and the relative humidity is the same as the set relative humidity. calculating an adjustment set humidity is the relative humidity of the air at the same temperature as before Symbol detected temperature be air having a water vapor partial pressure of the air humidity, so that the detection relative humidity by the humidity sensor becomes the adjustment set humidity Also includes a control unit that adjusts the humidity of the air by the air conditioner.

Further, the control method according to the present invention is a temperature / humidity adjusting device including a temperature detecting unit for detecting the temperature of air, a humidity detecting unit for detecting the relative humidity of the air, and an air conditioner for adjusting the temperature and humidity of the air. In, while adjusting the temperature of the air by the air conditioner so that the temperature detected by the temperature detection unit becomes the set temperature, the water vapor partial pressure of the air at the same temperature as the set temperature and the same relative humidity as the set relative humidity. calculating an adjustment set humidity was in a relative humidity of the air at the same temperature as before Symbol detected temperature air having, as detected relative humidity by the humidity sensor becomes the adjustment set humidity, the by the air conditioner adjust the humidity of the air.

Further, the control program according to the present invention is a temperature / humidity adjusting device including a temperature detecting unit for detecting the temperature of air, a humidity detecting unit for detecting the relative humidity of the air, and an air conditioner for adjusting the temperature and humidity of the air. This is a control program that controls the temperature of the air while adjusting the temperature of the air by the air conditioner so that the temperature detected by the temperature detection unit becomes the set temperature, and at the same temperature as the set temperature and the same relative humidity as the set relative humidity. calculating an adjustment set humidity is the relative humidity of the air at the same temperature as before Symbol detected temperature be air having a water vapor partial pressure of the air humidity, so that the detection relative humidity by the humidity sensor becomes the adjustment set humidity to, adjust the humidity of the air by the air conditioner.

In these configurations, the humidity of the air is adjusted so that the difference between the two relative humidity corresponding to the detected temperature during the adjustment becomes 0 while the temperature of the air is adjusted to the set temperature. Can be done. Accordingly, it that while being adjusted to a temperature of the air reaches the set temperature, the-out difference based Dzu that does not correspond to the temperature of the air being adjusted unnecessary humidification and dehumidification are carried out, to suppress Can be done.

Moreover, when the absolute humidity is adjusted to a set temperature within a low temperature range such as 10 ° C or less, where the absolute humidity is excessively smaller than the relative humidity, the adjustment setting is represented by a relative humidity larger than the absolute humidity. Humidity is calculated, and the humidity of the air is adjusted so that the difference between the relative humidity of the air being adjusted and the calculated adjustment set humidity becomes zero. That is, the humidity is adjusted based on the relative humidity. Therefore, even when the difference in absolute humidity before and after the adjustment is small, it becomes easy to adjust the humidity of the air.

Further, the control unit may calculate the adjusted set humidity based on the saturated vapor pressure of air at the set temperature, the saturated vapor pressure of air at the detection temperature, and the set relative humidity.

In this configuration, the adjusted set humidity is calculated based on the saturated vapor pressure of air at the set temperature, the saturated vapor pressure of air at the detection temperature, and the set relative humidity. Therefore, for example, the temperature / humidity adjusting device is provided with a storage device that stores the saturated vapor pressure of air at each temperature in advance so that the control unit can acquire the saturated vapor pressure of air at the set temperature and the detection temperature. By configuring the adjustment device, the control unit can be made to calculate the adjustment set humidity.

Further, in the above configuration, a first storage unit for storing the saturated vapor pressure of air at each temperature is further provided, and the control unit is capable of storing the saturated vapor pressure of air at the set temperature and the detected temperature from the first storage unit. It is preferable to acquire the saturated vapor pressure of air and calculate the adjusted set humidity from the acquired saturated vapor pressure of air at the set temperature, the saturated vapor pressure of air at the detected temperature, and the set relative humidity.

In this configuration, the saturated vapor pressure of air at a set temperature and the set relative humidity stored in the first storage unit are used to divide the vapor pressure of air at the same temperature as the set temperature and the same relative humidity as the set relative humidity. Can be calculated.

That is, in this configuration, the saturated vapor pressure of air at a set temperature and the saturated vapor pressure of air at a detection temperature stored in the first storage unit are used to set the partial pressure of steam calculated based on the set relative humidity. Adjusted humidity, which is the relative vapor pressure of air at the same temperature as the temperature and the same relative humidity as the set relative humidity, and the relative humidity of the air at the same temperature as the detected temperature, is the saturated vapor pressure of the air at the set temperature. It can be calculated based on the pressure, the saturated vapor pressure of the air at the detection temperature, and the set relative humidity.

Alternatively, in the above configuration, the control is further provided with a first storage unit that stores the saturated vapor pressure of air at each temperature and a second storage unit that stores the partial pressure of water vapor of air at each temperature and each relative humidity. The unit acquires the saturated vapor pressure of the air at the detected temperature from the first storage unit, acquires the vapor pressure of the air at the set temperature and the set relative humidity from the second storage unit, and obtains the acquired saturation. The adjusted set humidity may be calculated from the vapor pressure and the partial pressure of steam.

According to this configuration, the partial pressure of water vapor of air having the same temperature as the set temperature and the same relative humidity as the set relative humidity can be easily obtained from the second storage unit without calculation.

In this configuration, the partial pressure of water vapor based on the saturated vapor pressure of air at the set temperature acquired from the second storage unit and the set relative humidity and the saturated vapor pressure of air at the detection temperature stored in the first storage unit are used. From, the adjustment set humidity is calculated. That is, the adjusted set humidity, which is the relative humidity of the air having the same temperature as the set temperature and the same relative humidity as the set relative humidity, and the relative humidity of the air having the same temperature as the detected temperature, is set to the air at the set temperature. It can be calculated based on the saturated vapor pressure of air, the saturated vapor pressure of air at the detection temperature, and the set relative humidity.

Further, when the calculated adjustment set humidity exceeds 100%, the control unit preferably limits the adjustment set humidity to 100% or less.

According to this configuration, the adjustment set humidity is limited to 100% or less. Therefore, detection relative humidity by the humidity detecting unit, that the adjustment of the so humidity becomes 100% greater than the incorrect adjustment setting humidity takes place, can be avoided.

According to the present invention, it is possible to provide a temperature / humidity adjusting device, a control device, a control method, and a control program in which unnecessary humidification and dehumidification are suppressed and the temperature and humidity of air can be easily adjusted.

It is a block diagram which shows an example of the schematic structure of the environmental test apparatus. It is a figure which shows the outline of the adjustment control of the temperature and humidity of the air by a control part. It is a figure which shows the 1st specific example of the adjustment control of the temperature and humidity of an air by a control part. It is a flowchart which shows an example of the operation of an environmental test apparatus. It is a figure which shows the 2nd specific example of the adjustment control of the temperature and humidity of the air by a control part. It is a figure which shows the 3rd specific example of the adjustment control of the temperature and humidity of the air by a control part. It is a block diagram which shows another example of the schematic structure of the environmental test apparatus. It is a figure which shows the specific example of the adjustment of the temperature and humidity of the air in the conventional environmental test apparatus. It is a figure which shows an example of the psychrometric chart which shows the relationship between temperature, relative humidity and absolute humidity.

(overall structure)
Hereinafter, an embodiment of an environmental test device, which is an example of the temperature / humidity control device according to the present invention, will be described. FIG. 1 is a block diagram showing an example of a schematic configuration of the environmental test apparatus 1. As shown in FIG. 1, the environmental test apparatus 1 includes a test chamber 9 capable of accommodating a sample, an air conditioning chamber 8 for adjusting the temperature and humidity of air supplied into the test chamber 9, a display unit 40, and an operation. It includes a unit 50, a storage unit 60, and a control unit 10.

The partition wall 89 between the test chamber 9 and the air conditioning chamber 8 is provided with an air outlet 84 and a suction port 85. The air conditioner room 8 is provided with an air conditioner 80 and a blower 86. The air conditioner 80 adjusts the temperature and humidity of the air in the air conditioning chamber 8. Specifically, the air conditioner 80 includes a heater 81, an evaporator 82, and a humidifier 83.

The heater 81 raises the temperature of the air in the air conditioning chamber 8 by heating the air in the air conditioning chamber 8. The evaporator 82 lowers the temperature of the air in the air conditioning chamber 8 by cooling the air in the air conditioning chamber 8 and dehumidifies the air in the air conditioning chamber 8. The humidifier 83 humidifies the air in the air conditioning chamber 8 by supplying steam into the air conditioning chamber 8.

The heating capacity of the air by the heater 81, the cooling capacity of the air by the evaporator 82, and the supply amount of steam by the humidifier 83 are adjusted by the control unit 10. As a result, the ability of the air conditioner 80 to adjust the temperature and humidity of the air is adjusted.

The blower 86 is arranged so as to cause air circulation between the air conditioning chamber 8 and the test chamber 9. For example, the blower 86 is arranged in the vicinity of the upper wall 88 in the air conditioning chamber 8. The blower 86 generates wind at a predetermined wind speed.

The air whose temperature and humidity are adjusted in the air conditioning chamber 8 is blown out from the air outlet 84 into the test chamber 9 by the wind generated by the blower 86. As a result, air whose temperature and humidity are adjusted is supplied into the test chamber 9. By blowing air from the air conditioning chamber 8 into the test chamber 9, the air in the test chamber 9 is sucked into the air conditioning chamber 8 from the suction port 85. By repeating the circulation of air between the air conditioning chamber 8 and the test chamber 9 in this way, the temperature and humidity of the air in the test chamber 9 are adjusted.

The test room 9 is further provided with a room temperature sensor TR (room temperature detection unit). The room temperature sensor TR is composed of, for example, a temperature sensor and detects the temperature of air. The room temperature sensor TR is provided, for example, in the vicinity of the air outlet 84 in the test chamber 9 and detects the temperature of the air in the vicinity of the air outlet 84. Hereinafter, the temperature of the air detected by the room temperature sensor TR is referred to as a detection temperature PVT.

The test room 9 is further provided with a relative humidity sensor HR (humidity detection unit). The relative humidity sensor HR detects the relative humidity of the air. The relative humidity sensor HR is provided, for example, in the vicinity of the air outlet 84 in the test chamber 9 and detects the relative humidity of the air in the vicinity of the air outlet 84. Hereinafter, the relative humidity of the air detected by the relative humidity sensor HR will be referred to as a detected relative humidity PVH.

The arrangement positions of the blower 86, the air outlet 84, the suction port 85, the room temperature sensor TR, and the relative humidity sensor HR are not limited to the arrangement positions shown in FIG.

The display unit 40 is composed of, for example, a liquid crystal display or the like, and under the control of the control unit 10, displays various information such as an operation screen and a message of the environmental test apparatus 1. The operation screen includes an operation screen for inputting test conditions and the like. The test conditions include a target value for the temperature of the air in the test chamber 9 (hereinafter, set temperature SVT), a target value for the relative humidity of the air in the test chamber 9 (hereinafter, set relative humidity SVH), and execution of the test. Time etc. are included.

The operation unit 50 receives various instructions and information inputs to the environmental test apparatus 1. The operation unit 50 includes a touch panel device (not shown). The touch panel device is provided on the information display surface of the display unit 40, and when a soft key in the operation screen displayed on the display unit 40 is operated, the soft key and an instruction associated with the operation are input. Accept. The operation unit 50 is not limited to the touch panel device, and may be configured to include a keyboard, switches, and the like for inputting information.

The storage unit 60 stores information used by the control unit 10 for control. The storage unit 60 is composed of, for example, a storage device such as an HDD (Hard Disk Drive) or an SSD (Solid State Drive). The storage area included in the storage unit 60 is used as the first storage unit 61. The first storage unit 61 stores in advance information indicating the saturated vapor pressure of air at each temperature, which is represented by, for example, a table or a mathematical formula.

The information input by the operation unit 50, the detection temperature PVT, and the detection relative humidity PVH are input to the control unit 10. The control unit 10 controls each unit included in the environmental test device 1 such as the air conditioner 80 and the display unit 40. Specifically, the control unit 10 is composed of a PLC (programmable logic controller) including a CPU, RAM, ROM, and the like. The control unit 10 controls the air conditioner 80, the display unit 40, and the like by executing the sequence program stored in the RAM and the system program (firmware, control program) stored in the ROM by the CPU.

The control unit 10 receives the information and instructions input by the operation unit 50, and executes the test according to the received information and instructions. In the test, the control unit 10 controls the air conditioner 80 so that the temperature of the air in the test chamber 9 becomes the set temperature SVT, and the relative humidity of the air in the test chamber 9 becomes the set relative humidity SVH. Controls the air conditioner 80. The set temperature SVT and the set relative humidity SVH are input by the user using the operation unit 50 as test conditions as described above. The control unit 10 may be configured by a computer similar to the PLC provided in an external control device capable of communicating with the room temperature sensor TR, the relative humidity sensor HR, and the air conditioner 80.

<Background to recalling this control method>
The details of the control of the air conditioner 80 by the control unit 10 will be described below. First, the process leading to the recall of the control method of the air conditioner 80 by the control unit 10 will be described.

In the conventional environmental test apparatus, the temperature of the air in the test chamber 9 is adjusted, and the humidity of the air is adjusted based on the difference between the relative humidity PVH detected by the relative humidity sensor HR and the set relative humidity SVH.

FIG. 8 is a diagram showing a specific example of adjusting the temperature and humidity of air in a conventional environmental test apparatus. For example, as shown in FIG. 8, at the time "t40", the current set temperature SVT is "60 ° C" and the set relative humidity SVH is "20%". Then, it is assumed that the detected temperature PVT is "60 ° C." and the detected relative humidity PVH is "20%". Then, at the time "t41", the set temperature SVT is changed to "30 ° C." and the set relative humidity SVH is changed to "90%".

In this case, while adjusting the air temperature based on the difference between the detected temperature PVT "60 ° C" and the set temperature SVT "30 ° C", the temperature of the air being adjusted is the detected temperature PVT "60 ° C". The humidity is adjusted based on the difference between the detected relative humidity PVH “20%” and the constant set relative humidity SVH “90%” regardless of the detected temperature PVT.

Therefore, from the time "t41" to the time "t4z" when the air temperature becomes the set temperature SVT "30 ° C" and the relative humidity of the air becomes the set relative humidity SVH "90%". The absolute humidity gradually rises when the relative humidity is higher than the absolute humidity of the air (0.0244 kg / kg.DA) when the set temperature SVT is "30 ° C" and the set relative humidity SVH is "90%". .. Therefore, although the air must be dehumidified, the air is unnecessarily humidified.

Thus, the conventional environmental tester, the relative humidity corresponding to the temperature of the air between, those the adjustment of that detected by the relative humidity sensor HR the temperature of the air is adjusted to be the same as the set temperature SVT And the difference from the constant set relative humidity SVH that does not correspond to the temperature of the air being adjusted becomes the difference that does not correspond to the detection temperature PVT of the air being adjusted, and unnecessary humidification and dehumidification are performed based on the difference. Was afraid to be done.

FIG. 9 is a diagram showing an example of a psychrometric chart showing the relationship between temperature, relative humidity and absolute humidity. For example, as shown in FIG. 9, air A having a temperature of "4 ° C." and an absolute humidity of "0.003 kg / kg.DA" (relative humidity "60%") is used as a temperature of "2 ° C." and an absolute humidity of "0.003 kg / kg.DA". It is assumed that the temperature and humidity of the air are adjusted within a low temperature range such as 10 ° C. or lower, such as adjusting the air B to "0.017 kg / kg.DA" (relative humidity "40%").

In this case, the difference in absolute humidity between air A and air B (0.014 kg / kg.DA) is much larger than the difference in relative humidity between air A and air B (0.2 (= 20%)). It is small and close to 0. As a result, it becomes difficult to accurately fine-tune the humidity based on the difference close to 0.

Based on the above findings, the present inventor has recalled a control method for an air conditioner 80 that suppresses unnecessary humidification and dehumidification and facilitates adjustment of air temperature and humidity.

<Overview of air temperature and humidity adjustment control by the control unit 10>
Hereinafter, the outline of the adjustment control of the temperature and humidity of the air in the test chamber 9 by the control unit 10 will be described with reference to FIG. FIG. 2 is a diagram showing an outline of air temperature and humidity adjustment control by the control unit 10. FIG. 2 shows an air diagram in which the horizontal axis is the temperature of the air in the test chamber 9 and the vertical axis is the partial pressure of water vapor in the air in the test chamber 9. In FIG. 2, reference numeral LW indicates the saturated vapor pressure (relative humidity “100%”) of air at each temperature. Hereinafter, the saturated vapor pressure of air having a temperature T is referred to as a saturated vapor pressure LW (T).

The intersection SC of the straight line showing the same temperature as the temperature detected by the room temperature sensor TR and the relative humidity detected by the relative humidity sensor HR and the curve showing the same relative humidity as the PVH is the temperature and humidity of the current air in the test chamber 9. Indicates the state of. Hereinafter, the current air in the test chamber 9 will be referred to as the current air SC.

The intersection ST of the straight line showing the same temperature as the set temperature SVT and the curve showing the same relative humidity as the set relative humidity SVH is the same temperature as the set temperature SVT and the same relative humidity as the set relative humidity SVH in the test chamber 9. It shows the temperature and humidity of the air. Hereinafter, the air having the same temperature as the set temperature SVT and the same relative humidity as the set relative humidity SVH in the test chamber 9 will be referred to as a target air ST.

As shown by the broken line arrow in FIG. 2, the control unit 10 adjusts the temperature of the current air SC by the air conditioner 80 so that the temperature PVT detected by the room temperature sensor TR becomes the set temperature SVT. Further, the control unit 10 causes the air conditioner 80 to adjust the temperature of the air SC at present, and is the air having the water vapor partial pressure WPT of the target air ST, which is the same temperature as the temperature PVT detected by the room temperature sensor TR. Calculate the adjusted set humidity PIDH, which is the relative humidity of. The details of the calculation method of the adjustment set humidity PIDH by the control unit 10 will be described later.

Then, as shown by the solid line arrow in FIG. 2, the control unit 10 causes the air conditioner 80 to adjust the humidity of the current air SC so that the relative humidity PVH detected by the relative humidity sensor HR becomes the adjustment set humidity PIDH. .. In this way, the control unit 10 causes the air conditioner 80 to adjust the temperature of the current air SC, calculates the adjustment set humidity PIDH which is the relative humidity of the air STa , and determines the humidity of the current air SC by the air conditioner 80. adjusted to the calculated adjustment setting humidity PIDH, to repeat. As a result, the control unit 10 adjusts the temperature and relative humidity of the current air SC to the set temperature SVT and the set relative humidity SVH of the target air ST.

FIG. 3 is a diagram showing a first specific example of air temperature and humidity adjustment control by the control unit 10. For example, as shown in FIG. 3, at the time "t10", the current set temperature SVT is "60 ° C." and the set relative humidity SVH is "20%". Then, it is assumed that the detected temperature PVT is "60 ° C." and the detected relative humidity PVH is "20%". Then, at the time "t11", the set temperature SVT is changed to "30 ° C." and the set relative humidity SVH is changed to "90%".

In this case, the control unit 10 adjusts the temperature of the current air SC by the air conditioner 80 so that the temperature PVT detected by the room temperature sensor TR becomes the set temperature SVT “30 ° C”, and the same “30 ° C” as the set temperature SVT. And has the same "90%" target air ST steam partial pressure WPT as the set relative humidity SVH, and the adjusted set humidity PIDH "16%" which is the relative humidity of the air STa at the same "60 ° C" as the detection temperature PVT. Is calculated, and the air conditioner 80 is made to adjust the humidity of the current air SC so that the detected relative humidity PVH becomes the adjustment set humidity PIDH “16%”.

After that, every time a predetermined time elapses, the control unit 10 keeps the air conditioner 80 adjusting the temperature of the current air SC so that the temperature PVT detected by the room temperature sensor TR becomes the set temperature SVT “30 ° C.”. The adjustment set humidity PIDH is recalculated, and the air conditioner 80 is made to adjust the humidity of the current air SC so that the detected relative humidity PVH becomes the recalculated adjustment set humidity PIDH.

As a result, at the time "t1x", the control unit 10 adjusts the temperature of the air SC while being adjusted by the air conditioner 80 so that the temperature PVT detected by the room temperature sensor TR becomes the set temperature SVT "30 ° C". The set humidity PIDH "85%" is calculated, and the air conditioner 80 is made to adjust the humidity of the current air SC so that the detected relative humidity PVH becomes the adjusted set humidity PIDH "85%". As a result, at the time "t1z", the temperature of the air in the test chamber 9 is adjusted to the same temperature as the set temperature SVT "30 ° C.", and the relative humidity of the air in the test chamber 9 becomes the set relative humidity SVH "90". % ”Is adjusted to the same relative humidity.

As described above, according to the adjustment control of the air temperature and humidity by the control unit 10, the air temperature becomes the set temperature SVT “30 ° C” from the time “t11”, and the relative humidity of the air becomes the set relative humidity. Until the time "t1z" when the SVH becomes "90%", the absolute humidity of the air is the same as the set temperature SVT "30 ° C" and the relative humidity of the air is the same as the set relative humidity SVH "90%". (0.0244kg / kg.D.A.) becomes to decrease gradually, it is possible to eliminate the conventional such unnecessary humidification and dehumidification are carried out.

(Operation of environmental test device 1)
Hereinafter, the operation of the environmental test apparatus 1 will be specifically described with reference to FIG. In the description, the details of the method of calculating the adjustment set humidity PIDH by the control unit 10 will also be described. FIG. 4 is a flowchart showing an example of the operation of the environmental test apparatus 1.

It is assumed that the user inputs the test conditions and the test start instruction using the operation unit 50 after arranging the sample in the test room 9. In this case, as shown in FIG. 4, the control unit 10 accepts the input test conditions and the test start instruction, sets the accepted test conditions, and then starts the test (step S11). Specifically, in step S11, the control unit 10 sets the test conditions by storing the received test conditions in the RAM. After that, the control unit 10 starts the test.

When the control unit 10 starts the test, the control unit 10 starts controlling the temperature adjustment of the air by the air conditioner 80 (step S12). As a result, the air whose temperature has been adjusted by the air conditioner 80 is supplied into the test chamber 9 from the air outlet 84.

Specifically, in step S12, the control unit 10 heats the detection temperature PVT by the room temperature sensor TR to the set temperature SVT included in the test conditions set in step S11 by performing so-called PID control. The heating capacity of the air by the vessel 81 or the cooling capacity of the air by the evaporator 82 is adjusted. Further, the control unit 10 causes the blower 86 to generate wind having a predetermined wind speed while the air temperature is being adjusted by the air conditioner 80.

When the control unit 10 starts controlling the temperature adjustment of the air by the air conditioner 80, the control unit 10 calculates the adjustment set humidity PIDH (step S13).

Specifically, in step S13, the control unit 10 targets the target based on the saturated vapor pressure LW (SVT) of air at the set temperature SVT, the saturated vapor pressure LW (PVT) of air at the detection temperature PVT, and the set relative humidity SVH. The adjusted set humidity PIDH, which is the relative humidity of the air STa having the vapor pressure partial pressure WPT of the air ST and having the same temperature as the detection temperature PVT by the room temperature sensor TR, is calculated.

For example, in step S13, the control unit 10 acquires the saturated vapor pressure LW (SVT) of air at the set temperature SVT and the saturated vapor pressure LW (PVT) of air at the detection temperature PVT from the first storage unit 61. Then, the control unit 10 calculates the adjusted set humidity PIDH from the saturated vapor pressure LW (SVT) of the air at the acquired set temperature SVT and the set relative humidity SVH.

That is, the control unit 10 has the same temperature as the set temperature SVT and the set relative humidity SVH from the saturated vapor pressure LW (SVT) of the air at the set temperature SVT and the set relative humidity SVH stored in the first storage unit 61. Calculate the vapor pressure partial pressure WPT of the target air ST having the same relative humidity as.

Then, the control unit 10 calculates the adjustment set humidity PIDH from the calculated steam partial pressure WPT and the saturated vapor pressure LW (PVT) of the air at the detection temperature PVT stored in the first storage unit 61. As a result, the control unit 10 is air having a water vapor partial pressure WPT of air having the same temperature as the set temperature SVT and the same relative humidity as the set relative humidity SVH, and the relative humidity of the air STa having the same temperature as the detection temperature PVT. The adjustment set humidity PIDH is calculated.

FIG. 5 is a diagram showing a second specific example of air temperature and humidity adjustment control by the control unit 10. For example, as shown in FIG. 5, at the time "t20", the current set temperature SVT is "60 ° C." and the set relative humidity SVH is "90%". Then, it is assumed that the detected temperature PVT is "60 ° C." and the detected relative humidity PVH is "90%". Then, at the time "t21", the set temperature SVT is changed to "30 ° C." and the set relative humidity SVH is changed to "90%".

In this case, in step S13, the control unit 10 has the saturated vapor pressure LW (30 ° C.) (= 0.02717) of the air at the set temperature SVT “30 ° C.” acquired from the first storage unit 61 and the set relative humidity SVH “. The result calculated using "90%" and the saturated vapor pressure LW (60 ° C.) (= 0.15221) of air at the detection temperature PVT "60 ° C." acquired from the first storage unit 61 (for example, 16%). ) Is calculated as the adjustment set humidity PIDH.

When the control unit 10 calculates the adjustment set humidity PIDH in step S13, the control unit 10 controls the air humidity adjustment by the air conditioner 80 using the calculated adjustment set humidity PIDH (step S14).

Specifically, in step S14, the control unit 10 performs so-called PID control so that the relative humidity PVH detected by the relative humidity sensor HR becomes the adjusted set humidity PIDH calculated in step S13. The cooling capacity of the air by the 82 and the supply of steam by the humidifier 83 are adjusted.

When the control unit 10 starts the control of the humidity adjustment in step S14, the control unit 10 determines whether or not to end the test being executed (step S15). Specifically, in step S15, if the test execution time included in the test conditions set in step S11 has elapsed from the time when the control unit 10 starts the temperature adjustment control in step S12, the test is performed. Is determined to end. In other cases, it is determined that the test is not completed.

When the control unit 10 determines that the test is not completed (NO in step S15) and determines that a predetermined time has not elapsed from the time when the humidity adjustment control is started in step S14 (NO in step S16). The processing after step S15 is repeated. As a result, the control of the humidity adjustment started in step S14 is continued for the predetermined time until the test is completed.

Then, when a predetermined time elapses from the time when the humidity adjustment control is started in step S14 (YES in step S16), the control unit 10 causes the processes after step S13 to be performed. As a result, the calculation of the adjusted set humidity PIDH and the control of the air conditioner 80 using the calculated adjusted set humidity PIDH are repeated at the predetermined time intervals.

After that, when the control unit 10 determines that the test is completed in step S15 (YES in step S15), the control unit 10 ends the control of the temperature adjustment and the humidity adjustment by the air conditioner 80 (step S17). As a result, the control unit 10 ends the test.

As described above, in the configuration of the present embodiment, while the air temperature is adjusted to the set temperature SVT, the difference between the two relative humidity PVH and PIDH corresponding to the detected temperature PVT during the adjustment becomes 0. As described above, the humidity of the air can be adjusted. Thus, while the temperature of the air is adjusted to a set temperature SVT, that the-out difference based Dzu that does not correspond to the temperature of the air being adjusted unnecessary humidification and dehumidification are carried out, suppressing be able to.

Moreover, when the absolute humidity is adjusted to be excessively smaller than the relative humidity, for example, in the low temperature range of 10 ° C. or lower until the set temperature SVT is reached, the adjustment is expressed as a relative humidity larger than the absolute humidity. The set humidity PIDH is calculated, and the humidity of the air is adjusted so that the difference between the detected relative humidity PVH during the adjustment and the calculated adjusted set humidity PIDH becomes zero. That is, the humidity is adjusted based on the relative humidity. Therefore, even when the difference in absolute humidity before and after the adjustment is small, it becomes easy to adjust the humidity of the air.

(Modified Embodiment)
It should be noted that the above embodiment is merely an example of the embodiment according to the present invention, and does not mean that the present invention is limited to the above embodiment. For example, the present invention can be applied not only to the above-mentioned environmental test apparatus 1 but also to electric devices such as cooking ovens and air conditioners in which the temperature and humidity of air can be adjusted. Further, the embodiment according to the present invention may be a modified embodiment shown below.

(1) FIG. 7 is a block diagram showing another example of the schematic configuration of the environmental test apparatus 1. As shown in FIG. 7, the storage area of the storage unit 60 may be used as the second storage unit 62. Then, the second storage unit 62 may store in advance information indicating the partial pressure of water vapor contained in the air at each temperature and each relative humidity, which is represented by, for example, a table or a mathematical formula.

In this case, in step S13, the control unit 10 may calculate the adjustment set humidity PIDH as follows. Specifically, the control unit 10 acquires the saturated vapor pressure LW (PVT) of air having a detection temperature PVT from the first storage unit 61, and obtains the vapor pressure partial pressure WPT of air having a set temperature SVT and a set relative humidity SVH. (Ii) It may be acquired from the storage unit 62.

Then, the control unit 10 may calculate the adjustment set humidity PIDH from the acquired vapor pressure partial pressure WPT and the saturated vapor pressure LW (PVT) of the air at the acquired detection temperature PVT.

In this case, the water vapor partial pressure WPT of the air having the set temperature SVT and the set relative humidity SVH can be easily obtained from the second storage unit 62 without calculation.

Then, the adjusted set humidity PIDH is calculated from the water vapor partial pressure WPT acquired from the second storage unit 62 and the saturated vapor pressure LW (PVT) of the air having the detection temperature PVT stored in the first storage unit 61.

That is, even by this calculation method, the air has the vapor pressure WPT of the air having the same temperature as the set temperature SVT and the same relative humidity SVH as the set relative humidity SVH, and the relative humidity of the air having the same temperature as the detection temperature PVT. A certain adjusted set humidity PIDH can be calculated based on the saturated vapor pressure LW (SVT) of air at a set temperature SVT, the saturated vapor pressure LW (PVT) of air at a detection temperature PVT, and the set relative humidity SVH.

(2) In step S13, when the calculated adjustment set humidity PIDH exceeds 100%, the control unit 10 may limit the adjustment set humidity PIDH to 100% or less.

FIG. 6 is a diagram showing a third specific example of air temperature and humidity adjustment control by the control unit 10. For example, as shown in FIG. 6, at the time "t30", the current set temperature SVT is "30 ° C" and the set relative humidity SVH is "90%". Then, it is assumed that the detected temperature PVT is "30 ° C." and the detected relative humidity PVH is "90%". Then, at the time "t31", the set temperature SVT is changed to "60 ° C." and the set relative humidity SVH is changed to "90%".

In this case, in step S13, the control unit 10 sets the saturated vapor pressure LW (60 ° C.) (= 0.15221) of air at the set temperature SVT “60 ° C.”, the set relative humidity SVH “90%”, and the detection temperature PVT “ The adjusted set humidity PIDH is calculated from the saturated vapor pressure LW (30 ° C.) (= 0.02717) of air at “30 ° C.”.

However, since the calculated adjustment set humidity PIDH exceeds 100% (= 1), the control unit 10 sets the adjustment set humidity PIDH to "100%". The control unit 10 may limit the adjustment set humidity PIDH to less than 100% (for example, 95%) when the adjustment set humidity PIDH calculated in step S13 exceeds 100%.

According to this configuration, since the adjustment setting humidity PIDH is limited to less than 100 percent, that the detection relative humidity PVH is 100% greater than improper adjustment set humidity PIDH to become as humidity adjustment is made , Can be avoided.

1 Environmental test equipment (temperature and humidity adjustment equipment)
10 Control unit 60 Storage unit 61 First storage unit 62 Second storage unit 80 Air conditioner HR Relative humidity sensor (humidity detection unit)
LW Saturated Vapor Pressure PIDH Adjusted Humidity PVH Detected Relative Humidity PVT Detected Temperature SVH Set Relative Humidity SVT Set Temperature WPT Water Vapor Partial Pressure

Claims (8)

A temperature detector that detects the temperature of the air and
A humidity detector that detects the relative humidity of the air,
An air conditioner that adjusts the temperature and humidity of the air,
While adjusting the temperature of the air by the air conditioner so that the temperature detected by the temperature detection unit becomes the set temperature, the air has a partial pressure of water vapor at the same temperature as the set temperature and the same relative humidity as the set relative humidity. an air calculates the adjusted set humidity is the relative humidity of the air at the same temperature as before Symbol detected temperature, as detected relative humidity by the humidity sensor becomes the adjustment setting humidity of the air by the air conditioner and a control unit for adjusting the humidity,
A temperature and humidity control device equipped with. The temperature / humidity adjusting device according to claim 1, wherein the control unit calculates the adjusted set humidity based on the saturated vapor pressure of air at the set temperature, the saturated vapor pressure of air at the detected temperature, and the set relative humidity. Further equipped with a first storage unit for storing the saturated vapor pressure of air at each temperature,
The control unit
The saturated vapor pressure of air at the set temperature and the saturated vapor pressure of air at the detected temperature are acquired from the first storage unit, and the saturated vapor pressure of the acquired air at the set temperature and the saturated vapor pressure of air at the detected temperature are obtained. The temperature / humidity adjusting device according to claim 2, wherein the adjusted set humidity is calculated from the pressure and the set relative humidity. A first storage unit that stores the saturated vapor pressure of air at each temperature,
A second storage unit that stores the partial pressure of water vapor in the air at each temperature and relative humidity,
Further prepare
The control unit
The saturated vapor pressure of air at the detected temperature is acquired from the first storage unit, and the partial pressure of water vapor of air at the set temperature and the set relative humidity is acquired from the second storage unit, and the acquired saturated vapor pressure and the saturated vapor pressure are obtained. The temperature / humidity adjusting device according to claim 2, wherein the adjusted set humidity is calculated from the partial pressure of steam. The temperature / humidity adjusting device according to any one of claims 1 to 4, wherein the control unit limits the adjusted set humidity to 100% or less when the calculated adjustment set humidity exceeds 100%. A control device that controls a temperature / humidity adjusting device including a temperature detecting unit that detects the temperature of air, a humidity detecting unit that detects the relative humidity of the air, and an air conditioner that adjusts the temperature and humidity of the air.
While adjusting the temperature of the air by the air conditioner so that the temperature detected by the temperature detection unit becomes the set temperature, the air has a partial pressure of water vapor at the same temperature as the set temperature and the same relative humidity as the set relative humidity. an air calculates the adjusted set humidity is the relative humidity of the air at the same temperature as before Symbol detected temperature, as detected relative humidity by the humidity sensor becomes the adjustment setting humidity of the air by the air conditioner A control device including a control unit that adjusts humidity. In a temperature / humidity adjusting device including a temperature detecting unit for detecting the temperature of air, a humidity detecting unit for detecting the relative humidity of the air, and an air conditioner for adjusting the temperature and humidity of the air.
While adjusting the temperature of the air by the air conditioner so that the temperature detected by the temperature detection unit becomes the set temperature, the air has a partial pressure of water vapor at the same temperature as the set temperature and the same relative humidity as the set relative humidity. an air calculates the adjusted set humidity is the relative humidity of the air at the same temperature as before Symbol detected temperature, as detected relative humidity by the humidity sensor becomes the adjustment setting humidity of the air by the air conditioner control method to adjust the humidity. A control program for controlling a temperature / humidity adjusting device including a temperature detecting unit for detecting the temperature of air, a humidity detecting unit for detecting the relative humidity of the air, and an air conditioner for adjusting the temperature and humidity of the air.
While adjusting the temperature of the air by the air conditioner so that the temperature detected by the temperature detection unit becomes the set temperature, the air has a partial pressure of water vapor at the same temperature as the set temperature and the same relative humidity as the set relative humidity. an air calculates the adjusted set humidity is the relative humidity of the air at the same temperature as before Symbol detected temperature, as detected relative humidity by the humidity sensor becomes the adjustment setting humidity of the air by the air conditioner control program to adjust the humidity.

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