JPH09119697A - Freezing capability and auxiliary humidifying capability cross controlling type environment testing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a repetition of automatic capability changing-over of a freezer and an auxiliary humidifier and perform a stabilized control. SOLUTION: A control device 20 for a constant temperature and constant humidity device is comprised of a freezer control part 30 and an auxiliary humidifier control part 40 of which freezing capability and auxiliary humidifying capability are automatically changed over. They are comprised of signal transmission segments 41, 31 for generating signals when the auxiliary humidifying capability and the freezing capability are changed over, their signal receiving segments 32, 42, and control segments 33, 43 for resetting an automatic control state for automatically changing-over the freezing capability or auxiliary humidifying capability through signal receiving operation. Accordingly, when a heat generating load is produced in a tank, for example, and the operating number of auxiliary humidifier devices is increased, the signal is inputted to the signal receiving segment 32, a count of the control of the number of freezers is reset and an effect of increased number of auxiliary humidifier is reflected against the control, the non-required increasing in freezing capability is prevented and its control is stabilized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control technique for an environment test apparatus that includes a refrigerator and an auxiliary humidifier and is capable of automatically switching either or both of the refrigerating capacity and the auxiliary humidifier capacity.

[0002]

2. Description of the Related Art In addition to a refrigerator, an environmental tester is equipped with an auxiliary humidifier for effective cooling when a heat load is generated in a high humidity environment. The ability of this auxiliary humidifier is usually switched by a person operating a manual switch, or it is automatically switched (see Japanese Patent Laid-Open No. 7-144138). On the other hand, in order to operate the refrigerator economically, the refrigerating capacity can be switched by various methods such as manual operation or automatically.
Conventionally, such switching between the refrigerating capacity and the auxiliary humidifying capacity is manually or automatically performed independently of each other.

[0003]

As described above, the auxiliary humidifier is provided for the purpose of preventing unnecessary cooling and dehumidification by the refrigerator. For this reason, the refrigerator and the auxiliary humidifier have common conditions for operating them. Therefore, when each of them is operated or controlled only separately and independently as in the prior art, there is a possibility that the fluctuation in the capacity of one side affects the other side and the control of the other side is disturbed. Therefore, an object of the present invention is to solve the above-mentioned problems in the prior art and to provide an environmental test apparatus that does not disturb the automatic operating state of the auxiliary humidifier or the refrigerator.

[0004]

In order to solve the above-mentioned problems, the present invention comprises a refrigerator and an auxiliary humidifier so that the refrigerating capacity can be automatically switched and the auxiliary humidifying capacity can be switched. In the environmental testing apparatus described above, a first transmitter that generates a signal when switching the auxiliary humidifying capacity, a first receiver that receives the signal transmitted by the first transmitter, and the first receiver outputs the signal. And a refrigerating machine control state returning means for returning the automatic control state of automatically switching the refrigerating capacity to a predetermined state upon reception.

According to a second aspect of the present invention, in an environment test apparatus having a refrigerating machine and an auxiliary humidifier capable of switching the refrigerating capacity and automatically switching the auxiliary humidifying capacity, a signal is generated when the refrigerating capacity is switched. 2 transmitters,
A second receiver for receiving the signal transmitted by the second transmitter,
When the second receiving unit receives the signal, it has an auxiliary humidifier control state returning means for returning the automatic control state for automatically switching the auxiliary humidification capacity to a predetermined state.

According to a third aspect of the present invention, there is provided an environment test apparatus comprising a refrigerator and an auxiliary humidifier, which is capable of automatically switching the refrigerating capacity and the auxiliary humidifying capacity. A first transmitting unit that generates a signal, a first receiving unit that receives a signal transmitted by the first transmitting unit, and an automatic control state in which the refrigerating capacity is automatically switched when the first receiving unit receives the signal. Refrigerating machine control state returning means for returning to a state, a second transmitting portion for generating a signal when switching the refrigerating capacity, and the second
A second receiver for receiving the signal transmitted by the transmitter, and the second receiver
When the receiving unit receives the signal, it has an auxiliary humidifier control state returning means for returning the automatic control state in which the auxiliary humidification capacity is automatically switched to a predetermined state.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a schematic configuration of a thermo-hygrostat with an auxiliary humidifier, which is an example of an environmental test apparatus to which the present invention is applied. FIG. 2 shows the main part of the control device. The thermo-hygrostat is a refrigerator 1 and its evaporator 1a, heater 2, auxiliary humidifier 3 and its minute water droplet diverging section 3a, humidifier 4 and its vapor diverging section 4a, blower 5, dry bulb and wet bulb temperature. The sensors 6 and 7 are provided. Reference numerals 8 and 9 denote an air supply port and an air intake port, and the blower 5 circulates air between the test chamber 10 and the air conditioning chamber 11 via the air supply port 8 and the air intake port 9.

The refrigerator 1 has refrigerating stages 1-1 to 1-3 (FIG. 2) as a plurality of refrigerating capacity stages, and the number of stages used can be switched. Electric heaters are used for the heater 2 and the humidifier 4. The auxiliary humidifier 3 is composed of, for example, an ultrasonic humidifier, and ultrasonic waves generated from an ultrasonic generator (not shown) are sent by a bellows tube or the like to cause minute water droplets to be emitted from the minute water droplet emitting portion 3a. A plurality of auxiliary humidifiers 3 as well, for example, 3-1
3 to 3-3 are provided, and the number of those used can be switched.

As described above, in the thermo-hygrostat having the auxiliary humidifier 3, as shown in the schematic moist air diagram of FIG. 1 (b), the heat generation load can be effectively removed in a high humidity environment. . That is, due to the dual effect of humidification by the auxiliary humidifier and latent heat cooling shown by the line D-E, cooling accompanied by unnecessary dehumidification by the refrigerator as shown by a two-dot chain line in the figure (line C-
C ') and re-humidification with unnecessary heating by a humidifier (line D
It is possible to achieve energy-saving operation by eliminating'-E).
In the figure, point A is an air outlet outlet, point B is an inlet outlet, points C and C'are evaporator outlets, points D and D'are heater outlets, and point E.
Is the auxiliary humidifier outlet, and point F is the humidifier outlet, each point indicating the condition of moist air at each position.

The constant temperature and humidity chamber has a controller 20, in which a refrigerator controller 30 and an auxiliary humidifier controller 4 can be automatically switched between a refrigerating capacity and an auxiliary humidifying capacity.
0 is provided. The control device 20 receives the detection values of the operation unit 50, the dry bulb and wet bulb sensors 6 and 7 capable of setting temperature and humidity, and the temperature and humidity set values of the operation unit 50, and outputs the heater control output P.
The heating output generation unit 60 and the humidification output generation unit 70 that generate d and the humidifier control output Pw are provided, and the outputs thereof are sent to the heater 2 and the humidifier 4, and the refrigerator control unit 30 and the auxiliary humidification unit are provided. It is also sent to the vessel control unit 40.

The control units 30 and 40 respectively generate a signal 41 for changing the number of auxiliary humidifiers and a changing unit for changing the number of refrigerating stages as first and second transmitting units that generate signals when switching between the auxiliary humidifying capacity and the refrigerating capacity. 31, the auxiliary humidification capacity switching signal receiving section 32 and the refrigerating capacity switching signal receiving section 42 as the first and second receiving sections that receive the signals transmitted by the transmitting sections 41 and 31, and when these receive signals, they are frozen. Capacity and auxiliary humidification capacity are automatically switched to an automatic control state to a predetermined state, and a refrigerator control state returning portion and an auxiliary humidifier control state returning portion 33 as auxiliary humidifier control state returning means And 43.

A control unit 30 having the above-mentioned components
Also, each of 40 and 40 independently independently controls the refrigerating capacity and the auxiliary humidifying capacity. However, when either of the switching signal receiving portions 32 or 42 receives the capability switching signal, the automatic control state at that time is released and control is performed so as to return to the predetermined state. The predetermined state varies depending on the configuration of the control system, but may be a state in which the effect generated by switching either the refrigerating capacity or the auxiliary humidifying capacity can be reflected in the other control, for example, using a counter. If it is a control device, it means a state in which it is reset.

The transmitting parts 31 and 41 emit signals when the capability is switched, but the controller 3 operates when "switching".
It may be when 0 or 40 outputs a signal for switching the refrigerating capacity or the auxiliary humidifying capacity, or when the refrigerating capacity or the auxiliary humidifying capacity is switched. In the former case, the transmitting parts 31, 41 as well as the receiving parts 32, 42 and the returning parts 33, 43 are often integrated into the control unit 30 or 40 composed of microcomputer control or the like.
In the latter case, a capacity switching sensor or the like is provided.

FIG. 3 shows, in a general form, an example of a control flow by such a controller of the thermo-hygrostat. In the figure, the left side is the refrigerator controller and the right side is the auxiliary humidifier controller.
As the capacity switching control of only the left-side refrigerator, the condition A for increasing or decreasing the refrigerating capacity is started by setting the requirement A, which is the degree of capacity switching request, for example, given by the count number of the counter, to 0 (S-1). (S-2), the count A is (A-1), A, (A
+1) (S-3, 4, 5), then count A
Judges whether or not the specified value (-x) or (+ x) has been reached (S-6, 7), and when they have been reached, the ability is down or up, respectively, and the ability is maintained in that state at other times. (S-8, 9, 10). When the ability is switched to down or up, the count is reset to 0 and then the control state is entered again (S-1 or less). When you keep the ability, keep the current state of the count,
The control below the judgment is performed again (S-2 or less).

The same applies to the auxiliary humidification capacity switching control for the right side portion. In this case, the count is indicated by B, the specified value is indicated by y, and the step is marked with '. As the control in which both capacity switching controls are associated, when the refrigerating capacity is down or up (S-8 or 9), or when the auxiliary humidifying capacity is down or up (S-8 'or 9'), respectively, Send that signal R or W to the side. In the control on the other side, B = 0 or A = 0 is set and the respective counts are reset regardless of the control state at that time (S-1 'or S-1). As a result, in the reset side, the control below the determination is performed again from the state of the count 0, and the count is integrated.

FIG. 4 shows an example of operating states of the refrigerator and the auxiliary humidifier when the present invention is applied as described above. When the heat load of the sample placed in the test chamber 10 is turned on at the constant set temperature SV, the detection value PV of the dry-bulb temperature sensor rises, and in response to this, the refrigerator requirement and the auxiliary humidifier requirement are increased. When the latter reaches a specified value due to B = y during control, the auxiliary humidifier is turned on, and the latent heat of vaporization of the dispersed minute water droplets takes the heat load of the sample. At the same time, the signal is input to the refrigerator switching control device, and the demand degree of the refrigerator is reset to zero.

When the auxiliary humidifier is turned on, the detection value PV starts to decrease after a delay time t until the effect is exhibited.
And when the power is turned on, the degree of demand of the refrigerator becomes 0,
Even if the time delay t occurs, the control does not proceed during that time and the degree of demand of the refrigerator does not reach the specified value. Therefore, in response to a request for processing the same heat generation load, if one of the refrigerator and the auxiliary humidifier does not need to be upgraded when the other needs to be upgraded, it is possible to avoid increasing both capabilities. Control stability is obtained.

On the other hand, if the refrigerator and the auxiliary humidifier are independently controlled as in the conventional case, as shown by the chain double-dashed line in the figure, before the effect of turning on the auxiliary humidifier appears, the A of the refrigerator is controlled. When the count is accumulated and reaches the specified value, the refrigerator that does not need to be turned on is turned on,
An excessive cooling effect occurs, the requirement B of the auxiliary humidifier reaches a negative specified value, and the control humidification occurs in which the auxiliary humidifier is turned off. By applying the present invention, such a problem is prevented.

FIG. 5 and FIG. 6 show specific control examples including the determination criteria of the refrigerator to be controlled as described above.
FIG. 5 shows an output map for determining how to switch the refrigeration stages 3-1, 3-2, 3-3 shown in FIG. The output map shows the heating output from 0 to the maximum output of the heater 2 as 0 to 100%, and the humidification output from 0 to the maximum output at a right angle to this is also 0 to 100%.
With the vertical axis represented as. The coordinates are the first heating output point A and the first line A-C that connects the first heating output point A that is near the maximum output and the first humidification output point C that is near the maximum output with a substantially straight line. From the second heating output point B and the first humidification output point C, which are separated from the second heating output point B corresponding to the refrigerating capacity of each refrigeration stage toward the origin side, and the first heating output point C is separated from the second heating output point B toward the origin side by the humidification output portion corresponding to each stage refrigeration capacity 2nd line BD which connected the 2 humidification output points D with the substantially straight line, the output up area | region which is the 1st area | region outside 2nd line BD, 1st line AC and 2nd line B An output keep area which is a second area between -D, and an output down area which is a third area outside the first line AC.
It has.

The first heating output point A is 5 to 1 as a margin from the point of 100% heating output on the horizontal axis of humidification output 0%.
The point is set to a value smaller by about 0%. At the point where the humidification output is 0% and the heating output is 100%, dehumidification and heating are required at the same time, and a large refrigerating capacity is required for dehumidification in the low dehumidification area. The humidification output may be put in the output keep area instead of the output down area up to a few percent, but in this example, the output keep area is reduced by 5 to 10% in the heating output from the viewpoint of energy saving.

The second heating output point B is determined in consideration of the fact that the low humidity control area is on the horizontal axis of the humidification output of 0% and the sensible heat ratio in the amount of heat removed by the evaporator of the refrigerator is close to 1. Has been.
That is, assuming that the sensible heat ratio is 1, all the refrigerating capacity is replaced by the output of the heater 1, and the refrigerating capacity is determined by converting the refrigerating capacity into a ratio to the maximum output of the heater. Therefore, the heating output change width as the heating output corresponding to the refrigerating capacity is ΔD
%, The maximum output corresponding to the capacity of the heater is DH (kw), and the refrigerating heat amount for one refrigerating stage, which is the refrigerating capacity change width, is Q (kcal /
h), the point B can be obtained by the following calculation: ΔD = [Q / (DH × 860)] × 100 = A-BB = A− [Q / (DH × 860)] × 100

The first humidification output point C is the humidification output 1 in this example.
At 00%, the heating output is several% (for example, 5%). On the vertical axis of heating output 0%, it becomes the high humidity control region,
Experience has shown that the humidification output often stabilizes near 100%. However, the point where the heating output is 0% and the humidification output is 100% is originally desirable to be in the keep range because cooling and humidification are required at the same time. Since this occurs due to the control at a given place, in order to put this point in the keep range, a point with a few percent of humidification output was included in the keep range with a slight margin. However, when appropriate in an actual device, heating output 0%, humidification output 100%
Alternatively, a point having a slightly humidified output may be set as the limit of the keep range.

The second humidification output point D is determined in consideration of the fact that the vertical axis of the heating output 0% is the high humidity control region and the sensible heat ratio in the amount of heat removed by the evaporator is close to zero. ing. That is, assuming that the sensible heat ratio = 0, all the refrigeration capacity is replaced by the output of the humidifier 2, and the refrigeration capacity is determined by converting the refrigeration capacity to a ratio to the maximum output of the humidifier. Therefore, assuming that the humidification output change width as the humidification output equivalent to the refrigerating capacity is ΔW% and the maximum output corresponding to the capacity of the humidifier is WH (kw), ΔW = [Q / (WH × 860 × 600/640 )] × 100 = C−D D = C−Q / [(DH × 860 × 600/640)] × 100 The D point can be calculated. Where 60
0/640 means the latent heat change of the humidifier.

As in the present example, the first line AC and the second line AC
If the lines B-D are made straight, the output map can be created very easily only by calculation. Further, even if the points A to D deviate from each other in the actual operation, they can be easily corrected. However, in order to perform more strict control, the first line and the second line may be appropriately curved.

The refrigerator controller 30 shown in FIG. 2 receives the heating output signal Pd and the humidification output signal Pw, and when the point P (Pd, Pw) formed by them is in the up region or the down region in the output map. , Control is performed to increase or decrease the number of stages of the refrigerating capacity until it enters the keep region.

FIG. 6 shows an example of such control, and such processing is repeated every control cycle. In this example,
As shown in FIG. 4B, the refrigerating capacity of one stage is Q = 1000.
(Kcal / h) refrigeration calorie and a refrigerator rank corresponding to the number of stages of refrigeration capacity used. However, such ranks are not limited to those shown in the figure, and can be freely set by a combination of one or a plurality of refrigerators constituting the refrigeration equipment of the air conditioner and switching of the capacity of each refrigerator. . For example, three two-stage switchable refrigerators having the same capacity are provided, and an appropriate number of ranks are configured using equal six-stage refrigerating capacities.
/ 6, 2/6 and 3/6, and these can be combined to form a plurality of ranks. The rank is also
It is determined from the balance with the capacity of the heater and the humidifier.
In this case, the controllability is improved as the keep area of the output map is narrowed. However, as the rank increases, the refrigeration circuit becomes complicated or the number of chillers increases to increase the cost. Therefore, the rank is determined in consideration of such a relationship. Since such a refrigerator rank table is easily created for each air conditioner, the automatic refrigerating capacity selection control device of this embodiment can be easily adopted for each different air conditioner.

In the control flow of this example, "count" is set as in the case of FIG. This delays the processing time to prevent unnecessary switching of the refrigerating capacity due to temporary fluctuations in the heating output and humidifying output, and changes the rank until the output stabilizes when the refrigerating capacity is changed. This is to avoid. Therefore, the count x is determined so that it takes about 5 minutes to change the rank of the refrigerator in relation to the control cycle.

In the control flow, the following processes are repeated after the rank and count are set to 0 as an initial setting.
In the output map, it is determined whether or not the point P constituted by the heating output and the humidification output is in the output up area (S
-1), if it is in this area, the count is set to +1 and it is judged whether or not the count reaches + x (S-2, 3),
When the count reaches + x, input the operation signal of the refrigerator, the capacity switching signal, etc., and judge whether 3 stages of refrigeration are used and the rank becomes 3 (S-4). Increase the rank by 1 to 3 until entering the area (S-5, 6).

If the point P is not in the output up area, it is judged whether or not it is in the output down area (S-7) and the same processing as described above is performed (S-8, 9, 10, 11, 1).
2). However, in this case, the count is decremented, and if the count does not enter the output keep area, the count is decremented until the rank becomes zero. If the coordinate P does not exist in the output up area or the down area, it is checked whether it is in the output keep area (S-13), and if it is in the keep area, the control cycle is repeated without changing the count (S-14 and thereafter). ).

By controlling the number of stages of the refrigerating capacity as described above, it is possible to prevent disturbance of control in which the number of stages of using the refrigerating capacity is repeatedly increased / decreased. That is, for example, in FIG. 5, when the vehicle is operated at a point P in the output keeping area and a heat load is generated, the temperature in the room rises and the heating output decreases to enter the output up area shown by a point P _1. , Refrigerator rank 1
Although there is a possibility that the heating output will increase due to the rise, the output keeping area of the refrigerator 1 rank width is provided, so point P ₁ only falls within the output keeping area as shown by point P _2. And, it never goes to the output down area.
As a result, control disturbances in which the number of refrigeration capacity stages to be used is increased / decreased and the heating / humidifying output is repeatedly increased / down does not occur.

At any control stage of the above control, when the auxiliary humidifying capacity is switched as shown in FIG. 3 or FIGS. 8 to 10 which will be described later, the signal W is sent to the refrigerator control section and the refrigerator is operated. When the controller receives this, the count is reset to zero. After that, the control from (S-1) is performed. As a result, the refrigerating capacity is not switched immediately after the switching of the auxiliary humidifying capacity, and the effect of the auxiliary humidifying capacity switching is reflected in the control. Further, in the refrigerator controller, when the refrigerating capacity is switched, the signal R is transmitted to the auxiliary humidifier controller. In this way, the occurrence of control disturbance between the refrigerator and the auxiliary humidifier can be avoided.

7 to 10 show specific examples of the structure of the auxiliary humidifier controller 40. As shown in FIG. 7, the auxiliary humidifier control unit 40 includes the auxiliary humidifier number change transmission unit 41 shown in FIG.
In addition to the refrigerating capacity switching signal receiving portion 42 and the auxiliary humidifier control state returning portion 43, a heater corresponding control portion 44, a humidifier corresponding control portion 45, a temperature change rate corresponding control portion 46, a humidity change rate corresponding control portion 47, and In response to an operation signal from the operation unit 50 that includes the reset control unit 48 and that includes a setting switch that sets the temperature and humidity and an operation pattern switch that changes these in a step shape or a lamp shape, and that can set operation conditions, Each control part is selected and its control is performed.

The heater-corresponding control section 44 controls the heating output Pd.
When, for example, is 2% or less for 1 minute, the auxiliary humidifier 3 is sequentially turned on, and when it is 80% or more, it is sequentially turned off. When the low heating output signal continues for a long time, it is possible to determine that the heat carried in by the load has not been fully removed by the refrigerator, so the ON control in this is effective when the auxiliary humidifier 3 is turned on. This is because of latent heat cooling. On the other hand, if the high output continues for a long time, there is no heat from the load,
Since it is judged that cooling by the auxiliary humidifier is unnecessary, this is turned off.

The humidifier-corresponding control section 45 controls the humidification output Pw.
When, for example, is 95% or more for 1 minute, the auxiliary humidifier 3 is sequentially turned on, and when it is 5% or less, it is sequentially turned off. In this case, by using or stopping the use of the auxiliary humidifier, the humidification control can be performed quickly and accurately.

The temperature change rate corresponding control section 46 has a heating output Pd of 0 and a detected temperature of 0.1 for 5 minutes, for example.
When the temperature rises by ° C, the auxiliary humidifier 3 is controlled to be sequentially turned on. For example, when the temperature is suddenly dropped in a stepwise manner, the heating output is set to 0 even if there is no heat generation load. Therefore, it is not preferable to control by the heater corresponding control portion 44. However, if there is a heat load, the temperature will not easily drop only by cooling with the refrigerator. Therefore, if the difference from the set value does not decrease, it is judged that the heat load is large and the auxiliary humidifier To drive.

The humidity change rate correspondence control section 47 controls to turn off the auxiliary humidifier 3 sequentially when the humidification output Pw is 0 and the detected humidity is higher than the set humidity by 1% in relative humidity for 5 minutes. For example, when the humidity is suddenly dropped in steps, the humidification output signal is set to 0 even when there is a heat load and the auxiliary humidifier needs to be used. Therefore, it is not preferable to control the humidifier-corresponding control section 45. Therefore, with this control, the case where the auxiliary humidifier is unnecessary is detected and turned off.

The reset control section 48 reduces the disturbance of control when the temperature and humidity are suddenly changed by the operation section 50, for example, when the temperature change width is 5 ° C. or less or the humidity change width is 10% or less. Control to maintain the state before the change.

The selection of the control portion associated with the operation of the operation unit 50 and the like is performed as follows. 1. When temperature and humidity are stable: The auxiliary humidifier 3 is sequentially turned on / off by the heater corresponding control part 44, and the auxiliary humidifier 3 is sequentially turned off by the humidifier corresponding control part 45.

2. During temperature / humidity step transition In step transition, the temperature or humidity is rapidly changed in a stepwise manner. 1) When the temperature rises Turn off the auxiliary humidifier 3. This is because the follow-up of the temperature rise of the sample with respect to the temperature rise of the test chamber is delayed and a temperature difference occurs during that time, and the temperature of the sample becomes relatively low, so that dew condensation on the sample is prevented. 2) At the time of temperature decrease Controlled by the reset control unit 48, and when the temperature is out of the control range, the auxiliary humidifier 3 is turned off once. Then, control is performed by the temperature change rate corresponding control section 46 or the humidity change rate corresponding control section 47. 3) When the temperature is stable and only the humidity is increased or decreased, it is controlled by the reset control part 48, and when it is out of the control range, the auxiliary humidifier 3 is turned off once. Further, the heater corresponding control part 44 is turned on / off, and the humidity change rate corresponding control part 47 is turned off.

3. During temperature / humidity lamp transfer During lamp transfer, the temperature or humidity changes gradually over time. At this time, since the change is not sudden, the current state is maintained and the control by the reset control part 48 is not performed, the auxiliary humidifier 3 is sequentially turned on / off by the heater corresponding control part 44, and the humidifier corresponding control part 45 is performed. The auxiliary humidifier 3 is sequentially turned off or turned on. However, since the temperature and humidity are changing at this time, in order to avoid repeated on / off, once all the auxiliary humidifiers 3 are turned off, the state is maintained until the next step.

By the control as described above, the ON / OFF control of the auxiliary humidifier 3 can be performed automatically and accurately for all operation patterns and in relation to the control of the refrigerator. it can.

FIG. 8 shows a processing flow of the above three types of operation patterns when the temperature and humidity are stable, that is, after the set temperature and humidity are once reached. It is determined whether or not the output signal for heating control is, for example, 2% or less as the specified value a (S-1), and when it is below, it is determined whether the timer is counting (S-2) and counting is in progress. If there is, continue counting and 2
% Or less to determine if the time is up (S-3, 4), and if the time is up, determine whether all auxiliary humidifiers are on (S-5). If not, one unit is turned on (S-6), the timer is reset (S-7), the same process is repeated from (S-1), and the auxiliary humidifiers are sequentially turned on.

If the heating output is not less than the specified value a, the timer is reset and the heating output is set to the specified value b, for example, 8
It is judged whether it is 0% or more (S-8, 9), and when 80% or more continues for a certain time, the auxiliary humidifiers are sequentially turned off one by one by the timer as in the case of the specified value a (S- 1
0-14, 7 etc.). If the heating output is not below the specified value b, the timer is reset and it is judged whether the humidification output is below 5% as the specified value c (S-15, 16),
As with the case of the specified value A, if 5% or less continues for a certain time, the auxiliary humidifier is turned off sequentially by the timer (S-1
7-19, S-13, 14, 7, etc.).

At any control stage in the above control, when the refrigerating capacity is switched and the signal R is transmitted, the signal is received and the timer is reset (S-7), and thereafter (S-1). Is controlled from. As a result, the auxiliary humidifying capacity is not immediately switched after the refrigerating capacity is switched, and the effect of the refrigerating capacity switching is reflected in the control. When the auxiliary humidifying capacity is switched, the signal W is transmitted to the refrigerator controller.

FIG. 9 shows a processing flow when shifting to the temperature / humidity step among the three types of operation patterns. Whether the temperature has risen or not is judged, and if the temperature rises, all the auxiliary humidifiers are turned off (S-1, 2). If the temperature is not increased, it is determined whether the temperature is decreased (S-3). If the temperature is decreased, it is determined whether the step width D of the decrease is 5 ° C. or more (S-4), and the step width D is If it is largely 5 ° C or more, it is judged whether the heating output is 0% by turning off all the auxiliary humidifiers (S-5, 6). If the heating output is 0%, it is judged by the timer whether the time is up (S-7 ~
9) If the time is up, it is judged whether the detected temperature is higher than the set value and the difference, for example, 0.1 ° C is not reduced (S-10), and when it is not reduced, the heat generation load is effectively processed. Therefore, the auxiliary humidifiers are sequentially turned on one by one (S-11 to 13, 1 to 10).

If the heating output is not 0%, the timer is reset to determine whether the humidification output is 0% (S-1
4, 15), if this is 0%, it is judged whether or not the time is up by a timer (S-16 to 18), and if the time is up, the detected humidity is higher than the set value and, for example, the relative humidity is 1 It is judged whether the% does not shrink (S-19), and when it does not shrink, the auxiliary humidifiers are sequentially turned off one by one (S-20, 21, 13, 1-).
5, 14-19).

When the temperature is not rising / falling, it is judged whether the humidity is constant (S-22), and when the humidity changes, it is judged whether the change width E is 10% or more of the relative humidity (S). -23) When 10% or more and there is a large change, turn off all auxiliary humidifiers (S-2
4) When the change width is 10% or less and small, the auxiliary humidifier is not turned off in order to prevent control disturbance, and after the flow of heater-corresponding control shown in FIG. 8 is executed (S-1 in FIG.
4) The following flow of humidity change rate control is executed (S-25, 26).

At any control stage of the above control, when the refrigerating capacity is switched, the timer is reset (S-13), and then the control from (S-1) is performed again. When the auxiliary humidifying capacity is switched, the signal W is transmitted to the refrigerator controller.

FIG. 10 shows a processing flow when shifting to the temperature / humidity lamp. Since the change in temperature and humidity is gradual during the transition to the lamp, the process is basically the same as the process at the time of stable temperature and humidity shown in FIG. It is determined whether all the auxiliary humidifiers are off (S-1), and if all are off, that state is maintained to avoid repeated on / off (EN
D). If not all OFF, the process flow of FIG. 8 is executed (S-2 to 9). If the humidification output is not below the specified value c, the timer is reset (S-10),
It is judged whether or not the humidification output is, for example, a relative humidity of 100% or more as a specified value F (S-11), and if it is 100% or more, the auxiliary humidifiers are sequentially turned on by the timer (S-11).
-12-17).

At any control stage of the above control, when the refrigerating capacity is switched, the timer is reset (S-17), and then the control from (S-1) is performed again. When the auxiliary humidifying capacity is switched, the signal W is transmitted to the refrigerator controller.

In the above, the controller 20 for the thermo-hygrostat.
Has been described as having a refrigerator controller 30 and an auxiliary humidifier controller 40 capable of automatically switching between the refrigerating capacity and the auxiliary humidifying capacity. However, the present invention is also applicable to a device in which either the refrigerator or the auxiliary humidifier can automatically switch its capacity and the other manually switches its capacity from the operation unit. Even in this case, if the capacity switching signal on the manual side is transmitted to the automatic side and the control state is reset so that the automatic side receives this and reflects the effect of the switching on the manual side, waste of the capacity on the automatic side. It is possible to prevent the control from being disturbed.

[0052]

EFFECT OF THE INVENTION The auxiliary humidifier is equipped when there is a request to test an object to be tested that generates a heat load in a high humidity environment. That is, the auxiliary humidifier has a humidifying ability and
Since it also has a latent heat cooling effect due to evaporation of water, it is possible to maintain a high-humidity environment due to its humidifying ability, and it is also possible to remove a heat generation load due to the cooling effect due to evaporation of water. And when removing the heat load only with the refrigerator,
It is possible to prevent unnecessary re-humidification due to the dehumidifying action. Since the auxiliary humidifier has such a cooling effect, the auxiliary humidifier, like the refrigerator, is operated or controlled so that its capacity increases when the detected temperature in the test chamber becomes higher than the set temperature. . Thus, for example, when such a condition occurs, the capacity of either the auxiliary humidifier or the refrigerator is usually increased. As capacity increases, the temperature in the test chamber decreases, but it takes a certain amount of time for this result to occur.

According to the first aspect of the present invention, there is provided the first transmitting section for generating a signal when the auxiliary humidifying capacity is switched, and the first receiving section for receiving the transmitted signal. Since the machine control state returning means controls the automatic control state of the refrigerator to return to a predetermined state, the decision as to whether or not to switch the refrigerating capacity is made after the return re-control, so that the time is delayed. Thereby, for example, when the temperature in the test chamber becomes higher than the set temperature and the capacity of the auxiliary humidifier is increased, the capacity increase of the refrigerator can be suspended until the effect occurs. As a result, when the temperature in the test chamber is approaching the set temperature, it is possible to prevent the problem that the capacity of the refrigerator is further increased, an excessive temperature drop is caused, an undershoot is caused, and control is confused.

According to the second aspect of the present invention, the second transmitting section for generating a signal when switching the refrigerating capacity and the second receiving section for receiving the transmitted signal are provided, and the auxiliary humidification is performed by receiving the signal. Since the device control state returning means controls the automatic control state of the auxiliary humidifier to return to the predetermined state, the switching timing of the auxiliary humidifying capacity comes after the return re-control and is delayed by that time. As a result, it is possible to prevent the control from being disturbed as in the case described above.

According to the third aspect of the present invention, when either the refrigerating capacity or the auxiliary humidifying capacity is automatically switched, the other control state is returned to a predetermined state. It is possible to perform control that reflects the state. As a result, it is possible to prevent repetition of automatic capacity switching of the refrigerator and the auxiliary humidifier and obtain a stable control state. In addition, since the control can be performed while keeping the use capacity of the refrigerator or the auxiliary humidifier to a necessary minimum, energy saving of the environmental testing device can be achieved. Further, since the refrigerator or the auxiliary humidifier control state restoring means only restores the control state upon receiving a signal, it is not necessary to change each independent judgment condition or the like even if the present invention is applied, and it is simple. Can be configured into.

[Brief description of the drawings]

FIG. 1A is an explanatory diagram showing a schematic structure of a high temperature incubator with an auxiliary humidifier, and FIG. 1B is an explanatory diagram of an effect of the auxiliary humidifier.

FIG. 2 is a block diagram showing a configuration of a control device for the high temperature incubator.

FIG. 3 is a flowchart showing a state in which the refrigerator and the auxiliary humidifier are individually controlled and cross-controlled by the control device.

FIG. 4 is an explanatory diagram of changes in control states of a refrigerator and an auxiliary humidifier by cross control.

FIG. 5 is an explanatory diagram showing an output map for automatically selecting a refrigerating capacity.

FIG. 6A is a flowchart showing an example of automatic refrigeration capacity switching control, and FIG. 6B is an explanatory diagram of a refrigeration rank.

FIG. 7 is an explanatory diagram showing a specific configuration of an auxiliary humidifier control unit.

FIG. 8 is a flow chart when the temperature and humidity of the auxiliary humidifier control unit are stable.

FIG. 9 is a flowchart when the temperature / humidity step of the control unit is changed.

FIG. 10 is a flow chart when the temperature and humidity lamp of the control unit is changed.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Refrigerator 3 Auxiliary humidifier 31 Refrigeration stage number change transmission part (second transmission part) 32 Auxiliary humidification capacity switching signal reception part (first reception part) 33 Refrigerator control state restoration part (refrigerator control state restoration means) 41 Auxiliary Number of humidifiers change transmission part (first transmission part) 42 Refrigerating capacity switching signal reception part (second reception part) 43 Auxiliary humidifier control state restoration part (auxiliary humidifier control state restoration means)

Claims (3)

[Claims] 1. An environmental test apparatus comprising a refrigerator and an auxiliary humidifier, capable of automatically switching the refrigerating capacity and switching the auxiliary humidifying capacity, wherein a signal is generated when the auxiliary humidifying capacity is switched.
A transmitter and a first receiver for receiving a signal transmitted by the first transmitter.
An environment test apparatus comprising: a receiving unit; and a refrigerator control state returning means for returning an automatic control state in which the refrigerating capacity is automatically switched to a predetermined state when the first receiving unit receives the signal. 2. An environmental test apparatus comprising a refrigerator and an auxiliary humidifier, capable of switching the refrigerating capacity and automatically switching the auxiliary humidifying capacity, and a second transmitter for generating a signal when the refrigerating capacity is switched, A second receiving unit that receives the signal transmitted by the second transmitting unit, and an auxiliary humidifier control that restores the automatic control state in which the auxiliary humidifying capacity is automatically switched when the second receiving unit receives the signal to a predetermined state. An environment test apparatus comprising: a state returning unit. 3. An environmental test device comprising a refrigerator and an auxiliary humidifier, capable of automatically switching the refrigerating capacity and automatically switching the auxiliary humidifying capacity, wherein a signal is generated when the auxiliary humidifying capacity is switched.
A transmitter and a first receiver for receiving a signal transmitted by the first transmitter.
A receiving section, a refrigerator control state returning means for returning the automatic control state in which the refrigerating capacity is automatically switched to a predetermined state when the first receiving section receives the signal, and a signal for generating a signal when switching the refrigerating capacity 2 transmitter, a second receiver that receives the signal transmitted by the second transmitter, and an automatic control state that automatically switches the auxiliary humidifying capacity when the second receiver receives the signal, returns to a predetermined state And an auxiliary humidifier control state returning means for causing the environment test device.