JP6895919B2 - Environment forming device and environment forming method - Google Patents

Description

The present invention relates to an environment forming device such as an environmental test device, and more particularly to an environment forming device provided with a cooling device and controlling the humidity of a predetermined space to a target humidity.
The present invention also relates to an environment forming method for adjusting the humidity in the space to the humidity of the target environment.
The present invention also relates to a humidity control device that adjusts the humidity in the space to the humidity of the target environment, a computer program, and a storage medium that stores the computer program.

The environmental test device has a test room and creates an environment of a desired temperature and humidity in the test room. The environmental test device generally includes a heater, a cooling device, and a humidifying device. The heater is for raising the temperature of the test room. The cooling device is composed of a refrigerating cycle, and cools the test chamber by condensing a gaseous refrigerant and adiabatically expanding it in an evaporator. The humidifier humidifies the test room by evaporating water with the heat of an electric heater or vaporizing water with ultrasonic waves.

Patent Document 1 discloses an energy-saving environmental test apparatus.
The environmental test apparatus disclosed in Patent Document 1 includes a second expansion means capable of changing the opening degree on the downstream side of the evaporator. Then, the following steps are sequentially executed to adjust the environment in the test room to the target environment.
(1) A temperature drop step of driving a compressor to operate a cooling device and mainly lowering the temperature of a test room.
(2) A humidity lowering step in which the cooling device is operated with the opening degree of the first expansion means narrowed, water vapor is condensed on the surface of the evaporator, and the relative humidity of the space is mainly lowered.
(3) Humidity in which the cooling device is operated with the opening degree of the second expansion means adjusted to raise the temperature of the surface of the evaporator to evaporate or sublimate a part or all of the water adhering to the surface of the evaporator. Adjustment process.

In the environmental control device disclosed in Patent Document 1, the temperature in the test chamber is rapidly lowered in the temperature drop step.
In the subsequent humidity drop process, the humidity in the test room is reduced. In the humidity lowering step, since the cooling device is operated in a state where the opening degree of the first expansion means is narrowed down, the evaporation pressure of the refrigerant is lowered, the temperature of the refrigerant is lowered, and the surface temperature of the evaporator is lowered. Therefore, the air in contact with the evaporator condenses the contained water vapor. As a result, the air is deprived of water vapor, the amount of water decreases, and the relative humidity drops sharply.
In the humidity reduction process, the humidity in the test chamber is reduced to below the target humidity. That is, in the environmental test apparatus disclosed in Patent Document 1, the humidity in the test chamber is significantly lowered from the target environment.
In the subsequent humidity control step, the cooling device is operated with the opening degree of the second expansion means adjusted to raise the surface temperature of the evaporator to evaporate or sublimate the moisture adhering to the surface of the evaporator in the test chamber. Raise the humidity to bring the humidity in the test room to the target humidity.

Patent Document 2 discloses an environmental test device including a desiccant type dehumidifying device.

Japanese Unexamined Patent Publication No. 2012-251716 Japanese Unexamined Patent Publication No. 2011-257016

The environmental test apparatus disclosed in Patent Document 1 has an advantage of low power consumption. However, the environmental test apparatus disclosed in Patent Document 1 may take time to reach the target environment.
That is, in the environmental test apparatus disclosed in Patent Document 1, the humidity in the test chamber is lowered below the target environment in the process of forming the environment. After that, the moisture adhering to the surface of the evaporator is evaporated or sublimated to raise the humidity in the test chamber.
The environmental test apparatus disclosed in Patent Document 1 reduces the humidity in the test chamber to a humidity lower than the target humidity and then returns it to the target humidity. Therefore, when it takes time to finally reach the target humidity. There is.

In addition, when the evaporator of the environmental test equipment becomes frosted and grows, the cooling efficiency decreases. Therefore, it may be necessary to defrost regularly and the test may have to be interrupted.
Therefore, an operation called frost-free operation or non-frost operation may be performed. In this method of operation, the surface temperature of the evaporator is maintained at a temperature exceeding the freezing point temperature. As a result, although condensation may form on the surface of the evaporator, it does not freeze and the evaporator does not frost.

On the other hand, in the case of frost-free operation, the lower limit of the surface temperature of the evaporator is limited to a temperature exceeding the freezing point temperature, and the surface temperature of the evaporator is relatively high. Therefore, it may be difficult to secure a temperature difference from the dew point in the current environment, and the dehumidification efficiency may be low.
Therefore, when the frost-free operation is executed by the environmental test apparatus disclosed in Patent Document 1, it may take time even in the above-mentioned humidity drop step, and it may take more time to finally reach the target humidity. is there.

As a measure for reducing the humidity in the test chamber, it is conceivable to adopt a desiccant type dehumidifier as disclosed in Patent Document 2.
However, if the current environment is a low temperature and high humidity environment such as 10 degrees Celsius and 80% relative humidity, and the target environment is a low temperature and low humidity environment such as 10 degrees Celsius and 30% relative humidity. It may take some time to reach the target humidity in the test room.
That is, in the desiccant type dehumidifier, it is necessary to heat and regenerate the dehumidifying agent that has absorbed moisture. However, when the temperature of the air passing through the hygroscopic agent during moisture absorption is low, the hygroscopic agent is excessively cooled, and it takes time to raise the temperature for regeneration. Therefore, it may take time to reduce the humidity in the test chamber.

It is also conceivable to use a normal cooling device and a desiccant type dehumidifying device together, but when performing frost-free operation as described above, the lower limit of the surface temperature of the evaporator is limited to a temperature exceeding the freezing point temperature. Therefore, the dehumidifying efficiency of the cooling device may be inferior.
In particular, when a desiccant type dehumidifier is used in combination with the environmental test apparatus disclosed in Patent Document 1 to perform frost-free operation, it may take time to finally reach the target humidity.

Focusing on the above-mentioned problems of the prior art, the present invention has an object of providing an environment forming device, an environment forming method, a humidity control device, and a computer program capable of reaching a target humidity within a relatively short time. Is what you do.

An aspect for solving the above-mentioned problems is an environment forming device capable of adjusting the humidity of a predetermined space to the humidity of the target environment, which comprises a cooling device, wherein the cooling device includes a compressor, a condenser, and the like. It has an expansion means, an evaporator, and a downstream opening degree adjusting means. The downstream opening degree adjusting means is located on the downstream side of the evaporator, and the inside of the cooling device is filled with a phase-changing refrigerant. A series of refrigeration cycles are realized, the surface temperature of the evaporator is lowered, the water vapor in the air is liquefied or frozen to dehumidify, and the opening degree of the downstream opening degree adjusting means is adjusted. In an environment forming device capable of controlling the evaporation pressure of the refrigerant in the evaporator and adjusting the temperature of the evaporator, the evaporation device is provided in addition to the cooling device to reduce the humidity in the space. Evaporator temperature rise that adjusts the temperature of the vessel to below the freezing point temperature to lower the humidity in the space and raises the temperature of the evaporator after the humidity in the space reaches or near the humidity of the target environment. A step is carried out to raise the temperature of the evaporator to a temperature exceeding the freezing point temperature, and at least in the step of raising the temperature of the evaporator, the dehumidifying device suppresses the humidity rise in the space to increase the humidity in the space. It is an environment forming device characterized by maintaining the humidity of the target environment.

In the environment forming apparatus of this embodiment, the temperature of the evaporator is adjusted to be equal to or lower than the freezing point temperature to reduce the humidity in the space. In this step, the temperature of the evaporator is adjusted to be equal to or lower than the freezing point temperature, so that the surface temperature of the evaporator is low.
Therefore, it is possible to secure a sufficient difference from the dew point temperature in the current environment, and the water vapor in the air condenses in contact with the evaporator, the moisture in the air is deprived, and the humidity in the space drops sharply. ..
Since the surface temperature of the evaporator is lower than the freezing point temperature, the condensed water freezes on the surface of the evaporator and frost is formed.
When the humidity in the space reaches or near the humidity of the target environment, the temperature of the evaporator is raised. In this embodiment, an evaporator temperature raising step is carried out to raise the temperature of the evaporator to a temperature exceeding the freezing point temperature.
As a result, the frost adhering to the surface of the evaporator melts. If the surface of the evaporator is equal to or higher than the current dew point temperature, the moisture evaporates or sublimates on the surface of the evaporator to supply the moisture to the air, which causes an increase in the humidity of the space.
Here, the environment forming device of this embodiment has a dehumidifying device in addition to the cooling device. In the environment forming device of this embodiment, the dehumidifying device suppresses the humidity increase due to the evaporation of water and the like, and maintains the humidity in the space at the humidity of the target environment.
According to the environment forming device of this embodiment, the target humidity can be reached without excessively lowering the humidity in the space, so that the time required to reach the target humidity is relatively short.

Another aspect for solving the same problem is an environment forming device capable of adjusting the humidity of a predetermined space to the humidity of the target environment, which comprises a cooling device, wherein the cooling device includes a compressor and a condensing device. It has a vessel, an expansion means, an evaporator, and a downstream opening degree adjusting means. The downstream opening degree adjusting means is on the downstream side of the evaporator, and the inside of the cooling device is filled with a phase-changing refrigerant. It has a function of realizing a series of refrigeration cycles, lowering the surface temperature of the evaporator, liquefying or freezing water vapor in the air to dehumidify, and adjusting the opening degree of the downstream opening degree adjusting means. In an environment forming device capable of controlling the evaporation pressure of the refrigerant in the evaporator and adjusting the temperature of the evaporator, when a dehumidifying device is provided in addition to the cooling device to reduce the humidity in the space. , The temperature of the evaporator is adjusted to be equal to or lower than the dew point temperature of the target environment to reduce the humidity in the space, and after the humidity in the space reaches the humidity of the target environment or its vicinity, the temperature of the evaporator The temperature of the evaporator is raised to a temperature exceeding the dew point temperature of the target environment by carrying out a step of raising the humidity of the evaporator, and at least in the step of raising the temperature of the evaporator, the humidity in the space is raised by the dehumidifying device. It is an environment forming apparatus characterized by suppressing the humidity in the space and maintaining the humidity in the target environment at the humidity of the target environment.

"Adjusting the temperature of the evaporator to be below the dew point temperature of the target environment" is only when the dew point temperature is obtained by calculation or the like and the temperature of the evaporator is positively adjusted to be below the dew point temperature of the target environment. This includes cases where the temperature of the evaporator becomes lower than the dew point temperature of the target environment as a result of lowering the surface temperature of the evaporator.
In the environment forming apparatus of this embodiment, the temperature of the evaporator is adjusted to be equal to or lower than the dew point temperature of the target environment to reduce the humidity in the space. In this step, the temperature of the evaporator is adjusted below the dew point temperature, so the water vapor in the air comes into contact with the evaporator and condenses, the moisture in the air is deprived, and the humidity in the space drops sharply. ..
When the humidity in the space reaches the humidity of the target environment or its vicinity, the temperature of the evaporator is raised. In this embodiment, the evaporator temperature raising step is carried out to raise the temperature of the evaporator to a temperature exceeding the dew point temperature.
As a result, the condensed water and frost adhering to the surface of the evaporator evaporate or sublimate, supply moisture to the air, which causes an increase in the humidity of the space.
Here, the environment forming device of this embodiment has a dehumidifying device in addition to the cooling device. In the environment forming device of this embodiment, the dehumidifying device suppresses the humidity increase due to the evaporation of water and the like, and maintains the humidity in the space at the humidity of the target environment.
According to the environment forming device of this embodiment, the target humidity can be reached without excessively lowering the humidity in the space, so that the time required to reach the target humidity is relatively short.

In each of the above embodiments, it is desirable to raise the temperature of the evaporator to a temperature calculated based on the temperature of the target environment in the step of raising the temperature of the evaporator.

For example, adjust the temperature of the evaporator to the temperature of the target environment. Alternatively, the temperature of the evaporator is adjusted to the temperature obtained by adding or subtracting some correction value to the temperature of the target environment.
As a result, the temperature in the space converges to the temperature of the target environment.

In each embodiment described above, Oite to the evaporator temperature increasing step, it is desirable that the opening of the downstream opening control means Yuku narrows over a predetermined time or more.
Another aspect for solving the same problem is an environment forming device capable of adjusting the humidity of a predetermined space to the humidity of the target environment, which comprises a cooling device, wherein the cooling device includes a compressor and a condensing device. It has a vessel, an expansion means, an evaporator, and a downstream opening degree adjusting means. The downstream opening degree adjusting means is on the downstream side of the evaporator, and the inside of the cooling device is filled with a phase-changing refrigerant. It has a function of realizing a series of refrigeration cycles, lowering the surface temperature of the evaporator, liquefying or freezing water vapor in the air to dehumidify, and adjusting the opening degree of the downstream opening degree adjusting means. In an environment forming device capable of controlling the evaporation pressure of the refrigerant in the evaporator and adjusting the temperature of the evaporator, when a dehumidifying device is provided in addition to the cooling device to reduce the humidity in the space. , The temperature of the evaporator is adjusted to be equal to or lower than the freezing point temperature to lower the humidity in the space, and after the humidity in the space reaches the humidity of the target environment or its vicinity, the temperature of the evaporator is raised. A device temperature raising step is carried out to raise the temperature of the evaporator to a temperature exceeding the freezing point temperature, and at least in the evaporator temperature raising step, the dehumidifying device suppresses the humidity rise in the space to suppress the humidity rise in the space. The humidity is maintained at the humidity of the target environment, and in the evaporator temperature raising step, the opening degree of the downstream side opening degree adjusting means is narrowed over a certain period of time, and the temperature of the evaporator reaches the target temperature. It is an environment forming device characterized in that the downstream side opening degree adjusting means shifts to normal control when it is confirmed that the operation has been performed.
Another aspect for solving the same problem is an environment forming device capable of adjusting the humidity of a predetermined space to the humidity of the target environment, which comprises a cooling device, wherein the cooling device includes a compressor and a condensing device. It has a vessel, an expansion means, an evaporator, and a downstream opening degree adjusting means. The downstream opening degree adjusting means is on the downstream side of the evaporator, and the inside of the cooling device is filled with a phase-changing refrigerant. It has a function of realizing a series of refrigeration cycles, lowering the surface temperature of the evaporator, liquefying or freezing water vapor in the air to dehumidify, and adjusting the opening degree of the downstream opening degree adjusting means. In an environment forming device capable of controlling the evaporation pressure of the refrigerant in the evaporator and adjusting the temperature of the evaporator, when a dehumidifying device is provided in addition to the cooling device to reduce the humidity in the space. , The temperature of the evaporator is adjusted to be equal to or lower than the dew point temperature of the target environment to reduce the humidity in the space, and after the humidity in the space reaches the humidity of the target environment or its vicinity, the temperature of the evaporator The temperature of the evaporator is raised to a temperature exceeding the dew point temperature of the target environment by carrying out a step of raising the humidity of the evaporator, and at least in the step of raising the temperature of the evaporator, the humidity in the space is raised by the dehumidifying device. The humidity in the space is maintained at the humidity of the target environment, and in the evaporator temperature raising step, the opening degree of the downstream side opening degree adjusting means is narrowed over a certain period of time, and the evaporation is performed. It is an environment forming device characterized in that when it is confirmed that the temperature of the vessel has reached the target temperature, the downstream side opening degree adjusting means shifts to normal control.

For example, the opening degree of the downstream side opening degree adjusting means is continuously and slowly narrowed. As a result, the evaporation temperature of the refrigerant in the evaporator gradually rises, and the water content slowly evaporates or sublimates on the surface of the evaporator. As a result, moisture is gradually supplied to the air. Therefore, even if the capacity of the dehumidifying device is small, it is possible to suppress an increase in humidity in the space.

In each of the above aspects, it is desirable that the dehumidifying device is a water vapor adsorption type dehumidifying device.

A typical example of an environment forming device is an environment test device having a test room.

A method for solving the same problem is the above-mentioned cooling in the environment forming method in which the humidity in the environment forming space is adjusted to the humidity of the target environment by using a cooler capable of adjusting the surface temperature and a steam adsorption type dehumidifying device. humidity by generating a frost on the surface of the cooler is lowered to and below freezing point a dew point temperature of the target environment following the environment forming space the surface temperature of the bowl to the humidity or near the target environment After lowering, the surface temperature of the cooler is raised to a temperature above the freezing point temperature and exceeding the dew point of the target environment to evaporate or sublimate the frost, and the humidity rise due to the evaporation or sublimation of the frost is caused. It is an environment forming method characterized by being suppressed by the dehumidifying device.

In the environment forming method of the present invention, the surface temperature of the cooler is lowered below the dew point temperature of the target environment and below the freezing point temperature to generate frost on the surface of the cooler, and the humidity in the environment forming space is set as the target environment. Reduce to or near the humidity of.
Since the surface temperature of the cooler is below the dew point temperature of the target environment and below the freezing point temperature, the water vapor in the air comes into contact with the evaporator and condenses, and the moisture in the air is deprived and the humidity in the space becomes high. It drops sharply. In addition, the condensed water freezes on the surface of the evaporator and frost is formed.
When the humidity in the space reaches the humidity of the target environment or its vicinity, the temperature of the evaporator is raised. In this embodiment, an evaporator temperature raising step is carried out to raise the temperature of the evaporator to a temperature above the freezing point temperature and exceeding the dew point of the target environment.
As a result, the frost adhering to the surface of the evaporator evaporates or sublimates and supplies moisture to the air, which causes an increase in the humidity of the space. Is suppressed and the humidity in the space is maintained at the humidity of the target environment.
According to the environment forming method of this aspect, the target humidity can be reached without excessively lowering the humidity in the space, so that the time required to reach the target humidity is relatively short.

Another aspect for solving the same problem is in a cooler whose surface temperature can be adjusted and a humidity control device which controls a steam adsorption type dehumidifier to adjust the humidity to the target environment. the surface temperature was reduced humidity by generating a frost on the surface of the cooler is lowered below the freezing point temperature to humidity or near the target environment, then the surface temperature of the cooler to a temperature above the freezing point temperature It is a humidity control device characterized in that the frost is raised to evaporate or sublimate, and the humidity rise is suppressed by the dehumidifying device.

Yet another embodiment to solve the same problem is to operate a cooler whose surface temperature can be adjusted and a control device which controls a steam adsorption type dehumidifier to adjust the humidity to the humidity of the target environment. of a computer program, the surface temperature of the cooler to lower the humidity to produce a frost on the surface of the cooler is lowered below the freezing point temperature to humidity or near the target environment, then the cooling The computer program is characterized in that the control device is made to perform an operation of raising the surface temperature of the vessel to a temperature exceeding the freezing point temperature to evaporate or sublimate the frost and suppress the humidity rise by the dehumidifying device.

Yet another embodiment to solve the same problem is to operate a cooler whose surface temperature can be adjusted and a control device which controls a steam adsorption type dehumidifier to adjust the humidity to the humidity of the target environment. a storage medium storing a computer program, the surface temperature of the cooler to lower the humidity to produce a frost on the surface of the cooler is lowered below the freezing point temperature to humidity or near the target environment After that, the computer program that causes the control device to execute an operation of raising the surface temperature of the cooler to a temperature exceeding the freezing point temperature to evaporate or sublimate the frost and suppress the humidity rise by the dehumidifying device is stored. It is a storage medium characterized by being present.

The environment forming device and the humidity control device of the present invention can bring the humidity in the space to the target humidity at an early stage. The same applies to the environment forming method and the computer program of the environment forming apparatus of the present invention, and the time required for humidity adjustment is relatively short.

It is a conceptual diagram which shows the environmental test apparatus which concerns on embodiment of this invention. It is a block diagram of the control device of the environmental test apparatus of FIG. It is a flowchart which shows the operation of the environmental test apparatus of FIG. It is a part of a time chart showing the operation of the environmental test apparatus of FIG. It is another part of the time chart which shows the operation of the environmental test apparatus of FIG.

Hereinafter, embodiments of the present invention will be described.
The environmental test apparatus 1 of the present embodiment performs unique humidity control. The outline of humidity control is as follows.
That is, in the environmental test apparatus 1 of the present embodiment, when the humidity in the test chamber 6 is lowered to adjust to the humidity of the set environment, the surface temperature of the evaporator (cooler) 25 is set to be equal to or lower than the dew point temperature of the target environment. Moreover, the temperature is lowered below the freezing point temperature to generate frost on the surface of the evaporator 25.
During that time, the humidity in the test room 6 is monitored and the humidity in the target environment is reached. When the humidity in the test chamber 6 reached the humidity of the target environment, the surface temperature of the evaporator 25 was raised to a temperature above the freezing point temperature and exceeding the dew point of the target environment, and adhered to the surface of the evaporator 25. Evaporate or sublimate the frost. Then, the humidity rise due to evaporation or sublimation of frost is suppressed by a dehumidifying device.

Hereinafter, the specific configuration and function of the environmental test apparatus 1 will be described.
As shown in FIG. 1, the environmental test apparatus 1 of the present embodiment has a heat insulating housing 3 covered with a heat insulating wall 2. A door 5 is provided on one surface of the heat insulating housing 3.
The inside of the heat insulating housing 3 is divided into a test room 6 and an air conditioning passage 7 by a partition wall 8. An air outlet 11 and an air suction port 12 that communicate the test chamber 6 and the air conditioning passage 7 are provided above and below the partition wall 8.

The test room 6 is a space in which equipment, parts, and the like to be tested when performing an environmental test are arranged, and a desired test environment is formed. The test room 6 is provided with an indoor temperature detecting means 15 for detecting the temperature of the internal space and an indoor humidity detecting means 16 for detecting the relative humidity of the space.
In the present embodiment, the indoor temperature detecting means 15 and the indoor humidity detecting means 16 are arranged on the upper side of the test chamber 6 in the vicinity of the air outlet 11.

The air-conditioning passage 7 is a portion that generates air having a desired temperature and humidity, and a blower 20 and an air-conditioning device 21 are built in the air-conditioning passage 7. The air conditioner 21 includes an evaporator 25 of a cooling device 23, a humidifying device 26, and a heating heater 27. In this embodiment, the evaporator 25 functions as a cooler for cooling the inside of the test chamber 6.

The cooling device 23 includes a refrigerant circulation circuit 30 through which a refrigerant whose phase changes between gas and liquid flows. The refrigerant circulation circuit 30 executes a series of cycles (refrigeration cycle) in which the phase-changing refrigerant is compressed and condensed, and this is evaporated and cooled. The compressor 33, the condenser 35, and the expansion valve (expansion means) are executed. ) 36, an evaporator (cooler) 25, a downstream side drawing means (downstream side opening degree adjusting means) 37, and a refrigerant circulation pipe 38 for connecting these devices in a ring shape.
The opening degree of the expansion valve 36 and the downstream throttle means 37 can be adjusted, respectively. The downstream throttle means 37 is a diverted valve that is usually used as an expansion valve, and is structurally the same as an electronic expansion valve. The downstream side throttle means 37 can change the opening degree steplessly according to the signal voltage. The same applies to the expansion valve 36, and a valve whose opening degree changes steplessly according to a signal voltage is used.
The downstream side throttle means 37 is a downstream side opening degree adjusting means which is located on the downstream side of the evaporator 25 and can adjust the opening degree.

Further, a first refrigerant temperature detecting means 40 is provided on the upstream side of the evaporator 25. The first refrigerant temperature detecting means 40 is, for example, a conventionally known thermocouple or temperature sensor. The first refrigerant temperature detecting means 40 can detect the temperature of the refrigerant flowing into the evaporator 25.
On the other hand, on the downstream side of the evaporator 25, a second refrigerant temperature detecting means 41 and a refrigerant pressure detecting means 42 are provided. The second refrigerant temperature detecting means 41 is a conventionally known thermocouple or temperature sensor, like the first refrigerant temperature detecting means 40. The second refrigerant temperature detecting means 41 can detect the temperature of the refrigerant gas after passing through the evaporator 25. The second refrigerant temperature detecting means 41 can detect the evaporator outlet temperature of the evaporator 25.
The refrigerant pressure detecting means 42 detects the pressure of the refrigerant in the evaporator 25, and is a means for knowing the evaporation pressure of the refrigerant.
The refrigerant pressure detecting means 42 is, for example, a conventionally known pressure sensor.

Next, the operating principle of the cooling device 23 adopted in the present embodiment will be described.
When the compressor 33 of the refrigerant circulation circuit 30 is started, the refrigerant in the vapor phase state is compressed, cooled by the condenser 35, and liquefied. Then, the liquid refrigerant enters the evaporator 25 via the expansion valve 36 and is vaporized. Then, the temperature of the evaporator 25 is lowered by the refrigerant, and the air passing through the air conditioning passage 7 can be cooled. The temperature of the refrigerant flowing into the evaporator 25 is detected by the first refrigerant temperature detecting means 40 provided on the upstream side of the evaporator 25.

As is known, when the cooling device 23 is operated in a state where the opening degree of the expansion valve 36 is large, a large amount of refrigerant circulates in the refrigerant circulation circuit 30 and exhibits a large refrigerating capacity.
Further, when the cooling device 23 is operated with the opening degree of the expansion valve 36 narrowed down, the evaporation pressure of the refrigerant is lowered and the surface temperature of the evaporator 25 is lowered. On the other hand, the amount of the refrigerant circulating in the refrigerant circulation circuit 30 decreases, and the refrigerating capacity decreases. In the present specification, this state is referred to as "dehumidifying operation". That is, if the expansion valve 36 is throttled while the "cooling operation" is being executed, the refrigerant released through the expansion valve 36 becomes extremely low in temperature. As a result, the surface temperature of the evaporator 25 is lowered to below the dew point, and the water vapor contained in the air is condensed on the surface of the evaporator 25 to cause dew condensation. When the surface temperature of the evaporator 25 is equal to or lower than the freezing point temperature, the condensed water freezes to form frost and adheres to the surface of the evaporator 25.

In the environmental test apparatus 1 of the present embodiment, the downstream side drawing means 37 is provided on the downstream side of the evaporator 25, and the outlet of the evaporator 25 can be narrowed down by adjusting the opening degree of the downstream side drawing means 37. is there. In the above-mentioned "cooling operation" or "dehumidifying operation", if the opening degree of the downstream drawing means 37 is narrowed while the refrigerant is continuously injected into the evaporator 25, the evaporation pressure of the refrigerant in the evaporator 25 rises. The temperature of the surface of the evaporator 25 rises.

Water vapor in the air condenses or solidifies on the surface of the evaporator 25 during the "cooling operation" or "dehumidifying operation", and moisture (condensed water or frost) adheres to the surface. Part or all of the water adhering to the surface of the evaporator 25 evaporates or sublimates as the temperature of the surface of the evaporator 25 rises. As a result, the air passing through the air conditioning passage 7 is humidified.
In other words, the evaporator 25 serves as a "substantially humidifier".
In the present specification, the humidification operation performed by raising the surface temperature of the evaporator 25 is referred to as "humidification operation by a refrigerator".

In the environmental test apparatus 1 of the present embodiment, as a program for performing the "dehumidifying operation", the expansion valve 36 and the downstream are set so that the surface temperature of the evaporator 25 is "below the freezing point temperature and below the dew point temperature of the target environment". It has a "humidity rapid drop program" that controls the side drawing means 37.

Further, in the environmental test apparatus 1 of the present embodiment, as a program for performing "humidity operation by a refrigerator", the surface temperature of the evaporator 25 is set to "a temperature exceeding the freezing point temperature and exceeding the dew point of the target environment". It has a "humidity control program" that controls the expansion valve 36 and the downstream throttle means 37. In the humidity control program, the opening degree of the downstream throttle means 37 is slowly throttled over time.
The "humidity control program" is a program that executes an evaporator temperature raising step, and realizes an operation of raising the temperature of the evaporator 25 after the humidity in the test chamber 6 reaches the humidity of the target environment.
Each of the above programs is stored in a storage means (not shown) of the control device 60 (see FIG. 2).

In the present embodiment, the control device 60 functions as a humidity control device, and a storage means (not shown) is a storage medium that stores a computer program for executing a predetermined operation.

Further, the environmental test device 1 of the present embodiment includes a dehumidifying device 50 separate from the cooling device 23. The dehumidifying device 50 is, for example, a known desiccant type rotary type dehumidifying device, and is a water vapor adsorption type dehumidifying device.
As is known, the dehumidifying device 50 has a processing-side flow path 51 for flowing air for dehumidification treatment and a regeneration-side flow path 52 for flowing outside air for regeneration by partitioning the space inside the housing, and straddles both flow paths. The dehumidifying rotor 55 holding the hygroscopic agent is rotatably provided.

In the present embodiment, there is a dehumidifying flow path 65 parallel to the air conditioning passage 7, and the processing side flow path 51 of the dehumidifying device 50 is connected to the dehumidifying flow path 65 via a damper 62.
A heater (not shown) and a blower 61 are connected to the regeneration side flow path 52.
When dehumidifying is performed using the dehumidifying device 50, the damper 62 is opened to separate the air passing through the air conditioning passage 7, and the divided air is passed through the dehumidifying device 50 and then returned to the air conditioning passage 7. At this time, water vapor is adsorbed on the hygroscopic agent of the dehumidifying rotor 55.
At this time, while rotating the dehumidifying rotor 55, hot air is supplied to the regeneration side flow path 52 to remove water vapor from the dehumidifying agent of the dehumidifying rotor 55 to regenerate the dehumidifying agent.

The environmental test device 1 of the present embodiment can adjust the temperature and humidity by the air conditioning device 21 in the air conditioning passage 7, and can adjust the humidity by using the dehumidifying device 50.
That is, the air in the heat insulating housing 3 is sucked into the air conditioning passage 7 side from the air suction port 12 on the lower side of the partition wall 8 by the blower 20, passes through the air conditioning passage 7 vertically upward, and passes through the partition wall 7 vertically. The air is discharged from the air outlet 11 provided on the upper side of No. 8 to the test chamber 6 side.
If the surface temperature of the evaporator 25 is equal to or lower than the dew point temperature, the water vapor in the air comes into contact with the evaporator 25 to condense and dehumidify.

More specifically, when the blower 20 is started, air is discharged from the air outlet 11 and blown to the test chamber 6 side. As a result, an air flow is formed along the wall surface in the test chamber 6. Then, the air that has reached the air suction port 12 on the lower side of the partition wall 8 is introduced into the air conditioning passage 7 again. As described above, the evaporator 25, the humidifier 26, and the heater 27 are arranged in the air conditioning passage 7. Therefore, the temperature and humidity of the air introduced into the air-conditioning passage 7 are adjusted by the air-conditioning equipment 21 and supplied to the test chamber 6, so that the atmosphere in the test chamber 6 becomes a desired temperature and humidity. Is controlled.
Further, it is also possible to branch a part of the blower and let it flow through the processing side flow path 51 to dehumidify the inside of the test chamber 6 by using the dehumidifying device 50.

That is, the environmental test apparatus 1 has a control device 60 as shown in FIG. 2, and the current temperature and the current relative humidity in the test chamber 6 are monitored by the indoor temperature detecting means 15 and the indoor humidity detecting means 16 and are predetermined. The air-conditioning device 21 and the dehumidifying device 50 in the air-conditioning passage 7 are controlled based on the setting conditions of.

Next, the relationship between the control device 60 provided in the environmental test device 1 of the present embodiment and other devices will be described.

As shown in FIG. 2, the control device 60 used in the present embodiment is composed of a microcomputer, a microcontroller, a PLC (programmable logic controller), and the like. The control device 60 is a device capable of controlling other devices based on an input program. The control device 60 is connected to the indoor temperature detecting means 15, the indoor humidity detecting means 16, the first and second refrigerant temperature detecting means 40 and 41, and the refrigerant pressure detecting means 42 as input devices. The signals detected by each of the input devices are input to the control device 60.
On the other hand, a compressor 33, an expansion valve 36, a downstream throttle means 37, a heating heater 27, a humidifying device 26, a dehumidifying device 50, and the like are connected to the control device 60 as output devices. Therefore, the control device 60 can control the temperature and humidity in the test chamber 6 by controlling the device.
Specifically, the detection values of the indoor temperature detecting means 15 and the indoor humidity detecting means 16 are fed back to drive the air conditioner 21 and the dehumidifying device 50 so that the temperature and humidity in the test chamber 6 become those of the target environment. Control.

Further, the control device 60 adopted in the present embodiment has a function of calculating the surface temperature of the evaporator 25 by the detection signals from the first and second refrigerant temperature detecting means 40 and 41 and the refrigerant pressure detecting means 42. .. That is, the temperature of the refrigerant introduced into the evaporator 25 is detected by the first refrigerant temperature detecting means 40, and at the same time, the evaporation pressure of the refrigerant in the evaporator 25 is detected by the refrigerant pressure detecting means 42, and the surface of the evaporator 25 is detected from both of them. Calculate the temperature. Further, the calculation is corrected by the temperature of the refrigerant on the outlet side of the evaporator 25 (the temperature detected by the second refrigerant temperature detecting means 41).
Alternatively, the relationship between the temperature of the refrigerant introduced into the evaporator 25, the evaporation pressure of the refrigerant in the evaporator 25, and the surface temperature of the evaporator 25 is obtained in advance by an experiment, and the surface temperature of the evaporator 25 is determined in light of this experimental data. May be calculated.
Further, the surface temperature of the evaporator 25 may be simply obtained from the temperature of the refrigerant on the introduction side of the evaporator 25 and the temperature of the refrigerant on the outlet side.
As another measure, the relationship between the opening degree of the expansion valve 36 and the downstream throttle means 37 and the surface temperature of the evaporator 25 is obtained in advance by an experiment, and the evaporator 25 is obtained from the opening degree of the expansion valve 36 and the downstream throttle means 37. The surface temperature of the above may be obtained by calculation or the like.
At this time, it is recommended to take into consideration the rotation speed of the compressor 33, the detection pressure of the refrigerant pressure detecting means 42, and the atmospheric temperature.
The surface temperature of the evaporator 25 may be directly detected by a sensor or the like without calculation.

In any case, the environmental test apparatus 1 of the present embodiment calculates or detects the evaporation temperature in the evaporator 25 from the detection values of the first and second refrigerant temperature detecting means 40, 41, the refrigerant pressure detecting means 42, and the like. Then, the evaporation temperature (the surface temperature of the evaporator 25) can be controlled to be a set value.

Further, the control device 60 stores the above-mentioned "humidity rapid drop program" and "humidity control program".
When the "humidity rapid drop program" is executed, the opening degree of the expansion valve 36 is reduced. The opening degree of the downstream side drawing means 37 is widened.
As a result, the amount of the refrigerant introduced into the evaporator 25 is reduced, the back pressure by the downstream drawing means 37 is reduced, the evaporation pressure of the refrigerant is lowered, and the surface temperature of the evaporator 22 is lowered.
In the "humidity rapid drop program", as described above, the expansion valve 36 and the downstream throttle means 37 are controlled so that the surface temperature of the evaporator 25 is "below the freezing point temperature and below the dew point temperature of the target environment". To.

When the "humidity control program" is performed, Ru evaporator temperature increasing step is performed. That is, when the "humidity control program" is executed, the opening degree of the expansion valve 36 is widened, and the opening degree of the downstream throttle means 37 is slowly throttled.
As a result, the amount of the refrigerant introduced into the evaporator 25 increases, the back pressure by the downstream drawing means 37 gradually increases, the evaporation pressure of the refrigerant gradually increases, and the surface temperature of the evaporator 25 slowly increases. It rises over time.
In the "humidity control program", the expansion valve 36 and the downstream throttle means 37 are controlled so that the surface temperature of the evaporator 25 finally becomes "a temperature exceeding the freezing point temperature and exceeding the dew point of the target environment". To. In the present embodiment, in the "humidity control program", the surface temperature of the evaporator 25 is controlled so as to finally reach the set temperature of the test chamber 6.

Next, the environmental control method using the environmental test apparatus 1 of the present embodiment will be described with reference to the flowchart of FIG. 3 and the time charts of FIGS. 4 and 5.
In the environmental test device 1, the control device 60 automatically controls the inside of the test chamber 6 to a target temperature and relative humidity.
In the following, as an example of the case where the target environment in the test room 6 is first controlled to be a low temperature and high humidity environment and then the target environment is switched to the low temperature and low humidity operation as shown in the "target humidity" column of the time chart. The operation of the environmental test apparatus 1 will be described.
The following explanation focuses on humidity control, but of course the temperature is also adjusted to the temperature of the target environment.

According to the example, the low temperature and high humidity operation is started in step 1 of FIG. In step 2, automatic control of the air conditioner 21 and the dehumidifying device 50 is started.
That is, in the environmental test device 1 of the present embodiment, as described above, the air conditioner 21 and the dehumidifier 50 are controlled by the control device 60, and the air conditioner 21 and the like are automatically controlled so that the test chamber 6 has the set humidity. Will be done. Therefore, when the humidity in the test chamber 6 is lower than the target humidity, the humidifying device 26 is automatically driven to humidify the inside of the test chamber 6. If the humidity in the test chamber 6 is higher than the target humidity, the humidity is dehumidified by the cooling device 23 or the dehumidifying device 50.
The automatic control of the air conditioner 21 and the dehumidifying device 50 is constantly executed without interruption, and when the humidity in the test chamber 6 drops below the target humidity, the humidifying device 26 automatically drives the inside of the test chamber 6. humidified, humidity you dehumidified by the cooler 23 or dehumidifier 50 increases than the target humidity.

In low temperature and high humidity operation, the set humidity is set to, for example, 80% (relative humidity), and the target temperature is set to, for example, 10 degrees Celsius.
In the low-temperature and high-humidity operation, the expansion valve 36 has a wide opening, and the downstream throttle means 37 is adjusted to a medium opening as shown in the “downstream throttle means opening” column of FIG. 5, and the cooling device 23 operates. Will be done.
As a result, the surface temperature of the evaporator 25 (evaporation temperature of the refrigerant) becomes a relatively high temperature as shown in the “evaporation temperature” column of FIG.
In the low-temperature and high-humidity operation, the target humidity is high, so that the dehumidifier 50 is in a stopped state as shown in the “Dehumidifier drive amount” column of FIG.
The amount of water vapor in the test chamber 6 is large as shown in the “Amount of water vapor in air” column of FIG.
In the low temperature and high humidity operation, the inside of the test room 6 is maintained in a high humidity state as shown in the “test room humidity” column of FIG.

According to the example, the switching of the target environment is waited in step 3 of FIG. 3, and when the target environment is switched to the low temperature and low humidity condition, the process proceeds to step 4, and after that, the low temperature and low humidity operation is executed.
When the low temperature and low humidity operation is started, the target humidity of the test room 6 is changed to 10%.
Then, the humidity rapid drop program is activated in step 5 while the temperature is controlled by the expansion valve 36, and the evaporator temperature drop step is executed. Specifically, the cooling device 23 is controlled so that the surface temperature of the evaporator 25 is equal to or lower than the freezing point temperature and equal to or lower than the dew point temperature of the target environment.
In the evaporator temperature drop step, the downstream drawing means 37 is expanded in step 6. The opening degree of the downstream side drawing means 37 is as shown in the “Downstream side drawing means opening degree” column of FIG.

As a result, the surface temperature of the evaporator 25 (the evaporation temperature of the refrigerant) drops sharply as shown in the "evaporation temperature" column of FIG. On the surface of the evaporator 25, water vapor condenses as shown in the "condensation amount / evaporation amount (unit time)" column of FIG. The condensed water freezes immediately and is laminated on the surface of the evaporator 25 as shown in the “Amount of water around the evaporator” column in FIG.
Focusing on the environment in the test room 6, the relative humidity decreases rapidly as shown in the “test room humidity” column of FIG.
The amount of water vapor in the test chamber 6 decreases as shown in the “Amount of water vapor in air” column of FIG.
In the low temperature and low humidity operation, since the target humidity is low, the dehumidifier 50 is driven as shown in the “Dehumidifier drive amount” column of FIG.

The control device 60 constantly monitors the humidity in the test chamber 6, and in step 7, it is determined whether or not the humidity in the test chamber 6 has reached the target humidity.
When the humidity in the test chamber 6 reaches the target humidity as shown in the “Humidity in the test chamber” column of FIG. 4, the process proceeds to step 8, the humidity dive program ends, and the humidity control program starts and evaporates instead. The vessel temperature rise process is performed. Specifically, the cooling device 23 is controlled so that the surface temperature of the evaporator 25 exceeds the freezing point temperature and also exceeds the dew point temperature of the target environment. In this embodiment, the surface temperature of the evaporator 25 is controlled to be the temperature of the target environment.

When switching from the evaporator temperature drop process by the humidity rapid drop program to the evaporator temperature rise step by the humidity control program, the humidity in the test chamber 6 may deviate below the target humidity.
At this time, the humidifier 26 is automatically driven as shown in the “Humidifier drive amount” column of FIG. 4, and the undershoot of humidity in the test chamber 6 is suppressed as much as possible.
The operating amount of the dehumidifying device 50 gradually decreases as shown in the “Dehumidifying device driving amount” column of FIG.

In the evaporator temperature raising step, the downstream drawing means 37 is slowly throttled in step 9. The change in the opening degree of the downstream side drawing means 37 is as shown in the “Downstream side drawing means opening degree” column of FIG.
As the opening degree of the downstream drawing means 37 is narrowed, the surface temperature of the evaporator 25 slowly rises as shown in the “evaporation temperature” column of FIG.
When the surface temperature of the evaporator 25 exceeds the freezing point temperature, frost begins to melt. When the surface temperature of the evaporator 25 exceeds the dew point, condensed water or frost slowly evaporates or sublimates as shown in the “condensation amount / evaporation amount (unit time)” column of FIG.
As a result, the water laminated on the surface of the evaporator 25 is lost as shown in the “Amount of water around the evaporator” column in FIG.
Evaporation or sublimation of condensed water or frost is a factor that raises the humidity in the test chamber 6.

However, since the evaporation and sublimation of condensed water and frost are carried out slowly, the amount of water vapor generated from the surface of the evaporator 25 per unit time is relatively small. Here, the environmental test device 1 of the embodiment has a dehumidifying device 50.
In the environmental test apparatus of this embodiment, the water vapor diffused into the air from the surface of the evaporator 25 is captured by the dehumidifying apparatus 50. Therefore, although water vapor is generated from the surface of the evaporator 25, the humidity in the test chamber 6 does not fluctuate so much as in the “test chamber humidity” column of FIG.

When it is confirmed in step 10 that the surface temperature of the evaporator 25 has reached the target temperature, the process proceeds to step 11, the downstream drawing means 37 shifts to normal control, and thereafter, normal operation is performed (step 10). 12).
In step 8 described above, the surface temperature of the evaporator 25 is set to a temperature exceeding the freezing point temperature, and thereafter, the surface temperature of the evaporator 25 is maintained at a temperature exceeding the freezing point temperature. No frost is generated on the evaporator 25. Therefore, according to the environmental test apparatus 1 of the present embodiment, frost-free operation can be performed.

According to the present embodiment, when the humidity is lowered, frost is temporarily generated in the evaporator 25, but after that, the temperature of the evaporator 25 is raised to melt the frost, so that the frost-free operation can be performed.
The environmental test device 1 of the present embodiment contributes to energy saving because the power consumption of the humidifying device 26 is suppressed.

In the embodiment described above, the surface temperature of the evaporator 25 in the evaporator temperature lowering step is set to be equal to or lower than the freezing point temperature. According to this control method, the humidity in the test chamber 6 can be rapidly reduced, which is recommended.
However, when the temperature of the target environment is relatively high, the humidity in the test chamber 6 can be sharply lowered without necessarily lowering the surface temperature of the evaporator 25 to the freezing point temperature or lower. Therefore, it is not essential to adjust the surface temperature of the evaporator 25 to the freezing point temperature or lower in the evaporator temperature lowering step, as long as it is equal to or lower than the dew point temperature of the target environment.

It is desirable to grasp the dew point temperature of the target environment by calculation or the like, but even if the surface temperature of the evaporator 25 becomes lower than the dew point temperature of the target environment as a result of lowering the surface temperature of the evaporator 25. Good.
For example, as a result of setting the target temperature of the evaporator 25 to a temperature below the freezing point, the target temperature may be unintentionally lower than the dew point temperature of the target environment.

Further, in the above-described embodiment, the surface temperature of the evaporator 25 in the evaporator temperature raising step is set to a temperature exceeding the freezing point temperature.
According to this control method, it is recommended that the evaporator 25 is not frosted and frost-free operation can be performed.
However, if the purpose is not to perform frost-free operation, it is not always necessary to raise the surface temperature of the evaporator 25 to a temperature exceeding the freezing point temperature.
It is not essential to adjust the surface temperature of the evaporator 25 to a temperature exceeding the freezing point temperature in the evaporator temperature raising step, as long as it exceeds the dew point temperature of the target environment.

In the embodiment described above, the surface temperature of the evaporator 25 in the evaporator temperature raising step is set to be the temperature of the target environment.
The surface temperature of the evaporator 25 in the evaporator temperature raising step does not necessarily have to match the temperature of the target environment, but it is desirable that the surface temperature is a value related to the temperature of the target environment. Specifically, it is desirable to set the temperature calculated based on the temperature of the target environment. For example, it is desirable to multiply the temperature of the target environment by a coefficient, or add or subtract a certain value.

In the embodiment described above, the humidity in the test chamber 6 is monitored, and when the humidity in the test chamber 6 reaches the target humidity, the evaporator temperature lowering step is terminated and the evaporator temperature raising step is started. The timing for switching from the evaporator temperature lowering step to the evaporator temperature raising step does not have to be strictly when the humidity in the test chamber 6 reaches the target humidity, and may be after reaching the vicinity of the target humidity. As long as it reaches the vicinity of the target humidity, it may be after the humidity in the test chamber 6 has fallen below the target humidity.
For example, when the humidity drop rate is fast, when the evaporator temperature drop step is switched to the evaporator temperature rise step at the boundary of the target humidity, the humidity in the test chamber 6 undershoots due to the reaction delay and falls below the target humidity. There is.
Therefore, in anticipation of the undershoot caused by the delay in the reaction, the evaporator temperature lowering step may be switched to the evaporator temperature rising step immediately before the humidity in the test chamber 6 reaches the target humidity. On the contrary, the process may be switched after the humidity is slightly lower than the target humidity.

The timing for switching from the evaporator temperature lowering step to the evaporator temperature raising step is after the humidity in the test chamber 6 reaches or approaches the target humidity. The vicinity is, for example, about 5% before and after the value of the relative humidity centering on the target humidity. If the target humidity is 10 percent relative humidity, 5 percent of that value is 0.5 percent relative humidity, and if the relative humidity ranges from 10.5 percent to 9.5 percent relative humidity, this triggers the evaporator. Switch from the temperature drop process to the evaporator temperature rise process.

Although the dehumidifying device 50 is always automatically controlled, the dehumidifying device 50 may be operated after the evaporator temperature raising step is started.

In the embodiment described above, the evaporation temperature of the refrigerant in the evaporator 25 is regarded as the temperature of the evaporator (cooler) 25, and the evaporation temperature of the refrigerant is lower than the dew point temperature of the target environment and lower than the freezing point temperature. Therefore, it was considered that the surface temperature of the evaporator (cooler) 25 was below the dew point temperature of the target environment and below the freezing point temperature, and the step of dropping the temperature of the evaporator was changed to the step of raising the temperature of the evaporator. The present invention is not limited to this configuration, and the surface temperature of the evaporator 25 may be directly detected and the control method may be switched based on the detected value.

In the embodiment described above, the control device 60 itself stores a computer program that controls the cooler (cooling device 23) and the dehumidifying device 50. However, it is not always necessary that the control device 60 stores a computer program for controlling the cooler (cooling device 23) and the like.
For example, the control device 60 may be remotely controlled from an external computer by using a communication means such as the Internet. In this case, a computer program for operating the cooler and the dehumidifying device 60 is stored in an external computer.

Of course, a computer program may be taken into the control device 60 from the outside and used by using a communication means such as the Internet.
Examples of storage media for storing computer programs include hard disks, CD-ROMs, DVDs, and the like.

In the embodiment described above, the invention has been described by way of environmental test device as an example, the present invention can be applied to the environment forming apparatus other than environmental tester.

1 Environmental test equipment 6 Test room 7 Air-conditioning passage 15 Indoor temperature detection means 16 Indoor humidity detection means 23 Cooling device 25 Evaporator (cooler)
26 Humidifier 36 Expansion valve (expansion means)
37 Downstream side throttle means (downstream side opening adjustment means)
50 Dehumidifier 60 Control device

Claims (12)

An environment forming device that can adjust the humidity of a predetermined space to the humidity of the target environment.
The cooling device includes a compressor, a condenser, an expansion means, an evaporator, and a downstream opening degree adjusting means, and the downstream opening degree adjusting means is a downstream side of the evaporator. The inside of the cooling device is filled with a phase-changing refrigerant to realize a series of refrigeration cycles, lower the surface temperature of the evaporator, and liquefy or freeze water vapor in the air to dehumidify. In an environment forming device capable of adjusting the temperature of the evaporator by controlling the evaporation pressure of the refrigerant in the evaporator by adjusting the opening degree of the downstream side opening degree adjusting means.
It has a dehumidifying device in addition to the cooling device.
When lowering the humidity in the space, the temperature of the evaporator is adjusted to be equal to or lower than the freezing point temperature to lower the humidity in the space.
After the humidity in the space reaches the humidity of the target environment or its vicinity, an evaporator temperature raising step of raising the temperature of the evaporator is carried out to raise the temperature of the evaporator to a temperature exceeding the freezing point temperature.
An environment forming apparatus characterized in that, at least in the evaporator temperature raising step, the dehumidifying device suppresses the humidity rise in the space and maintains the humidity in the space at the humidity of the target environment. An environment forming device that can adjust the humidity of a predetermined space to the humidity of the target environment.
The cooling device includes a compressor, a condenser, an expansion means, an evaporator, and a downstream opening degree adjusting means, and the downstream opening degree adjusting means is a downstream side of the evaporator. The inside of the cooling device is filled with a phase-changing refrigerant to realize a series of refrigeration cycles, lower the surface temperature of the evaporator, and liquefy or freeze water vapor in the air to dehumidify. In an environment forming device capable of adjusting the temperature of the evaporator by controlling the evaporation pressure of the refrigerant in the evaporator by adjusting the opening degree of the downstream side opening degree adjusting means.
It has a dehumidifying device in addition to the cooling device.
When lowering the humidity in the space, the temperature of the evaporator is adjusted to be equal to or lower than the dew point temperature of the target environment to lower the humidity in the space.
After the humidity in the space reaches the humidity of the target environment or its vicinity, an evaporator temperature raising step of raising the temperature of the evaporator is carried out to raise the temperature of the evaporator to a temperature exceeding the dew point temperature of the target environment. Raise to
An environment forming apparatus characterized in that, at least in the evaporator temperature raising step, the dehumidifying device suppresses the humidity rise in the space and maintains the humidity in the space at the humidity of the target environment. The Oite the evaporator temperature rise step, the environment forming apparatus according to claim 1 or 2, characterized in that Yuku narrowing over the opening of the downstream opening degree adjuster certain period of time. An environment forming device that can adjust the humidity of a predetermined space to the humidity of the target environment.
The cooling device includes a compressor, a condenser, an expansion means, an evaporator, and a downstream opening degree adjusting means, and the downstream opening degree adjusting means is a downstream side of the evaporator. The inside of the cooling device is filled with a phase-changing refrigerant to realize a series of refrigeration cycles, lower the surface temperature of the evaporator, and liquefy or freeze water vapor in the air to dehumidify. In an environment forming device capable of adjusting the temperature of the evaporator by controlling the evaporation pressure of the refrigerant in the evaporator by adjusting the opening degree of the downstream side opening degree adjusting means.
It has a dehumidifying device in addition to the cooling device.
When lowering the humidity in the space, the temperature of the evaporator is adjusted to be equal to or lower than the freezing point temperature to lower the humidity in the space.
After the humidity in the space reaches the humidity of the target environment or its vicinity, an evaporator temperature raising step of raising the temperature of the evaporator is carried out to raise the temperature of the evaporator to a temperature exceeding the freezing point temperature.
At least in the evaporator temperature raising step, the dehumidifying device suppresses the humidity rise in the space to maintain the humidity in the space at the humidity of the target environment.
In the evaporator temperature raising step, the opening degree of the downstream side opening degree adjusting means is narrowed over a certain period of time, and when it is confirmed that the temperature of the evaporator reaches the target temperature, the downstream side opening is opened. An environment forming device characterized by shifting the degree adjusting means to normal control. An environment forming device that can adjust the humidity of a predetermined space to the humidity of the target environment.
The cooling device includes a compressor, a condenser, an expansion means, an evaporator, and a downstream opening degree adjusting means, and the downstream opening degree adjusting means is a downstream side of the evaporator. The inside of the cooling device is filled with a phase-changing refrigerant to realize a series of refrigeration cycles, lower the surface temperature of the evaporator, and liquefy or freeze water vapor in the air to dehumidify. In an environment forming device capable of adjusting the temperature of the evaporator by controlling the evaporation pressure of the refrigerant in the evaporator by adjusting the opening degree of the downstream side opening degree adjusting means.
It has a dehumidifying device in addition to the cooling device.
When lowering the humidity in the space, the temperature of the evaporator is adjusted to be equal to or lower than the dew point temperature of the target environment to lower the humidity in the space.
After the humidity in the space reaches the humidity of the target environment or its vicinity, an evaporator temperature raising step of raising the temperature of the evaporator is carried out to raise the temperature of the evaporator to a temperature exceeding the dew point temperature of the target environment. Raise to
At least in the evaporator temperature raising step, the dehumidifying device suppresses the humidity rise in the space to maintain the humidity in the space at the humidity of the target environment.
In the evaporator temperature raising step, the opening degree of the downstream side opening degree adjusting means is narrowed over a certain period of time, and when it is confirmed that the temperature of the evaporator reaches the target temperature, the downstream side opening is opened. An environment forming device characterized by shifting the degree adjusting means to normal control. The environment forming apparatus according to claim 1 to 5 , wherein in the evaporator temperature raising step, the temperature of the evaporator is raised to a temperature calculated based on the temperature of the target environment. The environment forming device according to any one of claims 1 to 6 , wherein the dehumidifying device is a water vapor adsorption type dehumidifying device. The environment-forming device according to any one of claims 1 to 7 , wherein the environment-forming device is an environment-testing device having a test room. In the environment formation method that adjusts the humidity in the environment formation space to the humidity of the target environment by using a cooler that can adjust the surface temperature and a water vapor adsorption type dehumidifier.
The humidity of the cooler a dew point temperature or less of the target environment the surface temperature of the allowed and lowered to below freezing point to produce a frost on the surface of the cooler and the humidity of the environment forming space the target environment or Lower to near,
Then, the surface temperature of the cooler is raised to a temperature above the freezing point temperature and exceeding the dew point of the target environment to evaporate or sublimate the frost.
An environment forming method characterized by suppressing an increase in humidity due to evaporation or sublimation of frost by the dehumidifying device. In a cooler that can adjust the surface temperature and a humidity control device that controls a steam adsorption type dehumidifier to adjust to the humidity of the target environment.
Wherein the surface temperature of the cooler to lower the humidity to produce a frost on the surface of the cooler is lowered below the freezing point temperature to humidity or near the target environment,
Then, the surface temperature of the cooler is raised to a temperature exceeding the freezing point temperature to evaporate or sublimate the frost.
A humidity control device characterized in that the humidity rise is suppressed by the dehumidifying device. A computer program for operating a cooler that can adjust the surface temperature and a control device that controls a water vapor adsorption type dehumidifier to adjust the humidity to the humidity of the target environment.
Wherein the surface temperature of the cooler to lower the humidity to produce a frost on the surface of the cooler is lowered below the freezing point temperature to humidity or near the target environment,
Then, the surface temperature of the cooler is raised to a temperature exceeding the freezing point temperature to evaporate or sublimate the frost.
A computer program characterized in that the control device executes an operation of suppressing an increase in humidity by the dehumidifying device. A storage medium that stores a computer program for operating a cooler that can adjust the surface temperature and a control device that controls a water vapor adsorption type dehumidifier to adjust the humidity to the humidity of the target environment.
Wherein the surface temperature of the cooler to lower the humidity to produce a frost on the surface of the cooler is lowered below the freezing point temperature to humidity or near the target environment,
Then, the surface temperature of the cooler is raised to a temperature exceeding the freezing point temperature to evaporate or sublimate the frost.
Storage medium characterized by having stored the computer program for executing the operation of suppressing the controller humidity raised by the dehumidifier.

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