JPS6191706A - Humidity controller - Google Patents

Abstract

PURPOSE:To improve responsiveness by detecting the quantity of variation of the output of a humidity detecting means per unit time, and forecasting humidity on the basis of the detected quantity and controlling a humidity control element. CONSTITUTION:An arithmetic processing means 22 composed of a microcomputer is equipped with a monitoring means 22a which monitors the output voltage of the humidity detecting means 180 at a specific period and holds the output voltage at the monitoring point of time until a next monitoring point, a storage means 22b which is stored with the output of the humidity detecting means 180 recognized at the last monitoring time, a humidity variation quantity detecting means 22c which compares the output voltage of the humidity detecting means 180 recognized by the monitoring means 22a at the current monitoring time with the last output voltage stored in the storage means 22b and outputs their deviation, and a humidity forecasting means 22d which calculates the quantity of humidity variation per unit time on the basis of the output of the means 22c and forecasts actual humidity on the basis of the calculated quantity. Then, the humidity control element is controlled on the basis of the forecasted value of this humidity forecasting means 22d.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a humidity control device used in conjunction with, for example, an air conditioner for an automobile.

[Background of the invention]

This type of humidity control device is disclosed in, for example, Japanese Patent Application Laid-Open No. 57-144835.
As shown in the figure, the humidity control element is directly controlled according to the output of the humidity sensor, which is the humidity detection means.

However, the humidity sensor has a fairly large response delay with respect to actual humidity changes (for example, there is a delay of about 10 minutes when the humidity changes from 40 degrees to 80%). For this reason, when IIFIJ is used in combination with an automotive air conditioner to control the humidity inside a vehicle, especially to defog the windows, this delayed response of the sensor delays the response of the humidity control element, resulting in insufficient humidity control. could not.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a humidity control device that can prevent a humidity control element from having a response delay even if the humidity detection means itself has a response delay, thereby sensitively following humidity changes.

[Summary of the invention]

The feature of the present invention is that it is configured to detect the amount of change in humidity per unit time and predict the actual humidity accordingly. The responsiveness of the control elements can be maintained without being impaired.

[Embodiments of the invention]

The principle of a humidity control device according to an embodiment of the present invention will be explained below.
This will be explained based on the diagram.

Humidity detection means 180 outputs a voltage corresponding to humidity.

The arithmetic processing means 22, which is formed by a microcomputer, has a monitoring means 22a that monitors the output voltage of the humidity detection means 180 at a predetermined period and holds the output voltage at the time of monitoring until the next time of monitoring. .

The arithmetic processing means 22 has a storage means 22b for storing the output voltage of the humidity detection means 180 recognized during the previous monitoring.

The arithmetic processing means 22 stores the output voltage of the humidity detection means 180 recognized by the monitoring means 22a during the current monitoring and the storage means 22b.
It has a humidity change amount detection means 22C that compares and calculates the output voltage of the previous humidity detection means 180 stored in the humidity change amount detection means 22C and outputs the deviation.

The arithmetic processing means 22 calculates the amount of humidity change per unit time based on the output of the humidity change amount detection means 22C.

and a humidity prediction means 22d that predicts and calculates the actual humidity based on the humidity change amount per unit time.

When the humidity prediction in the monitoring cycle is completed, the output voltage value stored in the storage means 22a is replaced with the output voltage value held by the monitoring means 22a, and is prepared for the next humidity prediction.

The transistors in the interface circuit 23 are controlled based on the predicted humidity value thus obtained, and thereby the humidity controlled elements (eg, dehumidifier, humidifier, defroster device) are controlled to stop driving.

A specific example in which a humidity control device based on the above principle is used in combination with an air conditioner for an automobile will be described in detail below.

First, the principle of automatic temperature control according to this specific example will be explained with reference to FIG. Target set temperature T11 set on the operation unit 3
The temperature difference ΔT−T is compared with the vehicle interior temperature Tl.
s Tm is subjected to a relative integral calculation (hereinafter referred to as PI calculation). If the result of the PI operation is set as X, the following equation holds true.

x = kl・ΔT + k z fΔTdt ・Old... (1) PI calculation is a method commonly used in the field of automatic control, and as seen in the above equation, it calculates the proportionality of the difference between the target and the actual state of the controlled object. The amount of time and the amount of time accumulated are totaled to measure the amount necessary to move the controlled object to the target state. The heat exchanger 1 transfers the amount of heat Q proportional to the value of the calculation result X to the passenger compartment 2.
The heat exchanger 190 is driven to send the heat to the inside. Cabin air (
The heat load 490) receives the outside 6L heat Qo of the above-mentioned amount of heat Q. The disturbance heat Qn includes heat entering from outside the vehicle, radiant heat due to sunlight, heat transferred from the engine compartment, heat generated by the occupants, and the like.

The cabin air receives a heat amount of Q + Qo, and the cabin temperature TR changes with a -th delay. This TR is negatively fed back to the control section 2. In such a negative feedback control system, automatic temperature control is achieved because it is mathematically proven that T11 stably converges to the set temperature T8 if the coefficients of each element are appropriate.

The concrete configurations of the above-mentioned humidity control device and the above-mentioned temperature control device are shown in FIG. 2 and below.

The heat exchange unit 1 includes an outside air intake port 102 that takes in outdoor air from outside the vehicle, and an inside air intake port 101 that takes in air from inside the vehicle, and an intake switching door 111 that controls opening and closing of these intake ports.
is provided. This suction port switching door 111 is directly controlled by a two-stage action negative pressure actuator 112 and a return spring 113. That is, each negative pressure working chamber of this negative pressure actuator 112 is connected to a celiac pressure source such as a negative pressure pump 90 via a solenoid valve 114 and 115, and the suction door 111 is connected to a 'WL solenoid valve 114'. 11
5. When both of the valves 114 and 115 are not energized, the force of the return spring 113 closes the outside air intake port 102, resulting in an internal air state. The supplied negative pressure closes the inside air suction port 101 and enters a state of sucking outside air. Further, when the solenoid valve 114 is energized and the solenoid valve 115 is not energized, the negative pressure acts only on one negative pressure working chamber of the negative pressure actuator 112, so the suction port switching door 111 stops at the intermediate position of the above state. Inside air intake port 101
, the outside air suction port 102 is both opened, and the state is such that inside and outside air is sucked.

A blower 121 that sucks air from the inside air outside air suction ports 101 and 102 and sends it to the heat exchanger (to be described later)
is provided. The air volume by this blower 121 is
It is controlled by fully controlling the applied voltage supplied to the motor 122 by the rotation speed sterilization circuit 123 controlled by the control unit 2.

An evaporator 131 is provided downstream of the blower 121, and this evaporator 131 is connected to a combrella'+j132 and an expansion valve
3 constitutes a compression refrigeration cycle, and serves as a cooling means for the air passing through it.

The compressor 132 is driven by an automobile engine via a magnetic clutch 132a. And the attendance,
The electromagnetic clutch 132a is driven by the combrella length relay 132b, which is controlled by a control signal from the control section 2.
This is done by energizing or de-energizing.

Furthermore, a heater core 141 serving as a heating means is provided downstream of the evaporator 131, and automobile engine cooling water (warm water) is circulated through the heater core 141.
1 heats the air passing through it. A warm adjustment door (hereinafter referred to as a temperature adjustment door) 142 controls the amount of air heating by increasing or decreasing the amount of air passing through the beater core 141. The temperature control door 142 is rotationally controlled by a negative pressure actuator 143 connected to the negative pressure source 90 via electromagnetic valves 145 and 146 and a return spring 144. When both the solenoid valves 145 and 146 are not energized, the negative pressure operating chamber of the negative pressure actuator 143 is connected to the solenoid valves 145 and 14.
6 to the atmosphere, no negative pressure acts, and the return spring 144 causes the temperature control door 142 to rotate in the direction in which θ is decreased in FIG. 2. In other words, the amount of air passing through the heater core 141 is will increase. When the solenoid valve 145 is energized and the solenoid valve 146 is not turned on, the negative pressure operating chamber of the negative pressure actuator 141 is connected to the solenoid valve 14.
It is connected to a negative pressure source through 6,145, and negative pressure acts thereon. As a result, the temperature control door 142 has a return spring 144
, and rotates in the direction in which θ increases. That is, it operates to reduce the amount of air passing through the heater core 141. lI! The potentiometer 147, which operates with a delay from the i-adjustment door 142, inputs a position signal corresponding to the position of the four-heater door 144 to the input terminal 148 of the control unit in the form of a voltage Vτ that increases as θ increases. . With the above configuration, the temperature control door 142 does not return lj 11 [1 set] The amount of air passing through the heater core 141 varies from 0 (maximum θ) to 100% (θ is controlled to O). The air that does not pass through the heater core 141 is energized through the bypass 103 provided in parallel to the heater core 141, passes through the heater core 141 downstream of the heater core 141, mixes with the heated air, and is blown out into the interior of the vehicle.

The air that has passed through the heater core 141 or the bypass 103 is blown into the interior of the vehicle from the upper outlet lO4 into the vehicle interior, the lower outlet 105, or the outlet 106 to the windshield. A mode door 151 is provided for switching the air outlet into the vehicle interior, and like the intake port switching door 111, this mode door 151 is also controlled to the υ3 position by a two-stage action type negative pressure actuator 152. Negative pressure actuator 1
The two negative pressure working chambers 52 are connected to the negative pressure source 90 via solenoid valves 154 and 155, respectively.
, 155 are not energized, the return spring 153 closes the upper outlet 104 and the air is blown out from the lower outlet 105. Also, the solenoid valve 154
, 155 are energized, the negative pressure source 90 is connected to both negative pressure chambers of the negative pressure actuator 152. The mode door 151 closes the lower outlet 105, and the air is blown out from the upper outlet 104. Ru. When the solenoid valve 154 is energized and the solenoid valve 155 is not energized, only one negative pressure working chamber of the negative pressure actuator 152 is connected to the negative pressure source 90, so the mode door 151 is in the intermediate position of the above state, and the upper When the outlet 104, the lower blowout, and the mouth 105 are both open, the air is blown out from both outlet ports, creating a so-called pie-level condition. Air outlet 10 to the front windshield glass
6 is opened and closed by a defroster door 156. Even when the defroster door 156 is closed, it is normally configured so that a small amount of air is discharged. The defroster door 156 is operated by a negative pressure actuator 157 connected to the negative pressure source via a solenoid valve 159 and a return spring 158. When the solenoid valve 159 is energized, negative pressure acts on the negative pressure actuator 157 and the defroster door 156 opens against the return spring 158, and when the solenoid valve 159 is not energized, the defroster door 156 is closed by the return spring 158.

The humidifier 190 is controlled by turning the power on and off, and the humidifier relay 191 is controlled by a control signal from the control unit 2 to turn the humidifier 190 on and off.

Evaporator 1 by a thermistor immediately downstream of evaporator 131
An exhaled air temperature sensor 160 is provided to detect the air temperature immediately after passing through No. 31, that is, the exhaled air temperature Tc, and inputs the exhaled air temperature Tc to the input terminal 161 of the control unit 2 in the form of a voltage VcO. A vehicle interior temperature sensor 170 is attached to an appropriate position in the vehicle interior, and inputs the vehicle interior temperature Tm in the form of a voltage VB to an input terminal 171 of the control unit 2.

Furthermore, a single-room humidity sensor module 180 is attached to an appropriate position in the vehicle interior, and inputs the vehicle interior humidity RH in the form of a voltage Vm to the input terminal 181 of the control unit 2. The humidity sensor module 180 is installed near the vehicle interior temperature sensor 170, as shown in FIG. Together with the vehicle interior temperature sensor 170, it is configured to come into contact with the vehicle interior air sucked in by an aspirator 182. Humidity sensor module 1
Reference numeral 80 indicates a humidity sensor 183, as shown in FIG. Oscillation circuit 184 for applying alternating current to 183
, and further includes a logarithmic conversion circuit 185.

The electrical resistance of the humidity sensor 183 decreases exponentially as the relative humidity increases, as shown in FIG. A logarithmic conversion circuit 185 is required to ensure detection accuracy on the high humidity side where the resistance value of the humidity sensor 18/3 is small. As shown in FIG. 6, the output voltage of the humidity sensor module 180 has a linear characteristic that is approximately proportional to the relative humidity. However, since the electrical resistance of the humidity sensor 183 is temperature dependent, VI! also has temperature dependence.

The control unit 2 includes an A/D converter 21 that converts analog signals from the sensors and the operating unit 3 into digital signals, and a digital signal from the A/D converter 21 and a digital signal from the operating unit 3. It is composed of a microcomputer 22 that processes all the drive signals of the controlled devices that control temperature and humidity based on the microcomputer 22, and an interface circuit 23 that controls each device of the heat exchange section 1 based on the output signals of the microcomputer 22. has been done. This interface circuit 23 connects the solenoid valves 114 and 115 of the heat exchange section 1,
145, 146, 154, 155, 159, compressor relay 132b, transistors 231 to 239 as switch elements that control the humidifier relay 191,
It is comprised of a D/A converter 240 for supplying an analog voltage to the landscape control circuit 123 that supplies power to the motor 122.

The operation unit 3 includes an air conditioner switch (not shown) for starting and stopping this device, a temperature setting device 31 for setting the desired temperature in the vehicle interior, and a defroster mode for blowing air from the air outlet 106 onto the windshield. Selection switch 3
It consists of 3 etc. The desired temperature of the vehicle interior (target set temperature Ts) set by the temperature setting device is input to the control unit 2 as a voltage Vs, and the operation signal Vogt of the defroster mode selection switch 33 is also input to the control unit 2 in the form of a voltage. is input.

The operation of this embodiment having the above configuration will be explained.

7, 8, and 9 show the microcomputer 22.
2 is an operation flowchart of the program. The numbers in the figure are step numbers indicating the order of the flow. The illustrated energization and operation of the device include an initialization step of steps 201 to 203, a main routine that repeats steps 204 to 217 infinitely, and one cycle of this main routine (approximately 0.5 seconds in the embodiment). In comparison, the interrupt routine processes steps 220 to 227 at a period several tenths of a second (in the embodiment, one hundredth of a second).

When this device is activated by the air conditioner switch, the output terminal of the microcomputer 22 of the control section is set to the initial state determined by step 201, and the output terminal of the microcomputer 22 is set to the initial state determined by step 202. Initial values are written to random access memory (RAM) that is not currently available.

Next, in step 203, the position of the temperature control door 142 (
Voltage Vt of potentiometer 147 corresponding to θ=0)
is converted into a digital value CVy,l by the A/D converter 21, and read as the initial value of the temperature control door reference position.

Note that this temperature control door reference position signal is monitored and updated at step 224 of the interrupt routine, which will be described later.

Next, the main routine will be explained.

Target set temperature T set by the setting device 31 of the operation unit 3
Voltage Va corresponding to II, voltage Vm corresponding to cabin temperature Tm detected by room temperature sensor 170, discharge temperature sensor 16
The voltage Vc corresponding to the exhaled air temperature Te detected at 0 is converted into a digital value CVm by the A/D converter 21 in step 204.

It is converted into [vII] and [VC] and input to the microcomputer 22. The voltage Va corresponding to the single room humidity RH detected by the humidity detecting means 180 is read in step 206, and the voltage Vy corresponding to the position of the temperature control door 142 is read in step 222 of the timer interrupt. (V
m ), (Vc:l is a digital value (TR ),
[:Converted to TC:1.

The single room humidity RH is determined in step 206, and the detailed flow is shown in FIG. As shown in FIG. 9, the response of the humidity sensor 183 when the humidity is changed stepwise differs depending on the moisture absorption and dehumidification and temperature conditions. Furthermore, in the case of a humidity sensor that does not change much over time, its response time is several tens of thousands
It is very long.

Therefore, the response time constant of the humidity sensor 183 and the amount of change RH in the detected humidity RH' of the humidity sensor 183 per unit time.
'-RH'o (H10 is the previous detected humidity),
The actual cabin humidity RH is estimated using the following formula.

RH=RH'+α(R,H'-H'o)...
-(2) Here, the response time constant α changes depending on the cabin temperature Tm, but can be approximated by a linear function thereof, and is determined by the following equation.

α=A(T wing 1B) ・・・・・・・・・(
3) Here, A and B are constants, especially A is the humidity sensor 18
3 is in a moisture absorbing state or a dehumidifying state, υ depends on whether the compressor 132 acting as a dehumidifier is on or off, and whether the humidifier 190 is on or off.

As described above, in order to obtain the amount of change in the detected humidity RH' of the humidity sensor +j 183 per unit time, the input and processing of the output voltage VH of the humidity sensor height module 180 is performed at regular time intervals. It is determined in step 300 whether a predetermined time specified by step 226 of a timer interrupt, which will be described later, has elapsed, and the following processing is executed only when the predetermined time has elapsed.

The voltage Vm corresponding to the detected humidity is converted to a digital value [:VFI:l] by the A/D converter 21 in step 301.
The converted data is input to the microcomputer 22.

CV*) is calculated from the digital value [VM] corresponding to the detected humidity according to the cabin temperature Tm relative humidity H' conversion map stored in the ROM of the microcomputer 22 based on the characteristics shown in FIG. 6 in step 302. Digital value corresponding to relative humidity corrected according to room temperature TR [几H/
). In order to determine the coefficient A of the response time constant α, in step 303 it is determined whether the compressor t132 is on or off. When the compressor is on and dehumidifying, the moisture absorption/desorption state of the humidity sensor 183 is determined from the current detected humidity [几H'] and the previous detected humidity (RH'o) in step 304, and when moisture is absorbed, If it is determined that
05 and constant A is α. 2. When it is determined that it is time to close and dehumidify, the constant A is set to α in step 306. , b. When the compressor is off, turn on and off the humidifier 190 in step 30.
7, and if the humidifier is on, the moisture absorption/desorption state of the humidity sensor 183 is determined in step 308 from the currently detected humidity (RH') and the previous detected humidity (R, H'o). However, if it is determined that moisture is being absorbed, the constant A is set to α, binding, and binding in step 309, and if it is determined that moisture is being removed, step 3 is set.
10, the constant A is α, 4b. When both the compressor and humidifier are off and neither dehumidification nor humidification is performed, the humidity sensor 183's moisture absorption/desorption state is determined by the current detected humidity [几H'
] and the previous detected humidity (RH?+:] Step 3
11, and when it is determined that moisture is being absorbed, step 312
Let the constant A be α. tl, and when it is determined that it is time to dehumidify, the constant A is set to α in step 313. Let it be tb. The relationship of constant A between each condition is α, 2. 〉α. It is set as fa>α11 α−ph>αatb>αhak. As a result of the above, in step 314, the response time constant α is determined based on the above-mentioned equation (3), and in step 315, the actual relative humidity R is determined based on the above-mentioned equation (2).
H is predictively calculated. Finally, the currently detected humidity (RH') obtained in step 302 is stored in R, AM as the previously detected humidity CRH'o] to be used next time, and the humidity calculation processing routine is ended.

Next, the digital value of the voltage corresponding to the set temperature [:Vg)
is converted into a digital value [Tll] of the target setting temperature in step 207 using a first-order conversion formula. In step 208, the digital value [T
8] and the digital value of the vehicle interior temperature [TII] is calculated.

Next, in step 210, the digital value [X] indicating the required amount of cooling energy is calculated based on the equation (1).
)+7f(Δ'l']d t. First, the integral term in the above equation is calculated every predetermined time specified by the timer process in step 225 of the interrupt routine shown in FIG. The above-mentioned temperature deviation [ΔT] is determined and integrally added in step 209. In step 210, the control signal [X] is determined by adding k [ΔT] to this integral term.

Note that in the above equation, τ is a constant determined by the control system.

The control signal [x] thus obtained is an amount corresponding to the amount of heat required by the cabin heat load in the process of controlling the cabin temperature TR to the target set temperature T++, and in this embodiment, k>0.
Since τ>0 is selected, when (X:]>0, the larger the [x] value is, the greater the heating power is required, and when CXI<O, [-
The larger X] means that the single room heat load requires a larger cooling power.

Thereafter, based on the value of this control signal [X], the heat exchange section 1 of the air conditioner is controlled according to the operating characteristics shown in FIG. 11 or FIG. 12. Fig. 11 shows a case where the compressor 132 is operated to dehumidify regardless of the heat load in the passenger compartment, and Fig. 12 shows a case in which the target exhaust air temperature Tco immediately after the evaporator 131 is determined according to the heat load in the single room, and the compressor 132 is operated. This is the case for energy control. Which operating characteristic should be used to control the heat exchanger l depends on the relative humidity H determined in step 206.
Therefore, judgment is made according to the characteristics shown in FIG.

In the case of high humidity, the dehumidification is performed by controlling with the characteristics shown in FIG. 11, and when the humidity is low, energy saving is achieved by controlling with the characteristics shown in FIG. 12. Hl in FIG. 13 is 60% aH in this embodiment, and β is a safety amount determined by the characteristics shown in FIG. 14 depending on the cabin temperature TR. Humidity sensor module 18
As shown in FIG. 10, the response of 0 becomes slower as the temperature decreases, and the error in estimating the atmospheric humidity R and H in step 206 increases. Therefore, as shown in FIG. 14, the operating point is shifted to the low humidity side as shown by the broken line in FIG. 13 by using the safety amount β, which increases as the temperature decreases, to prevent fogging of the windows.

In steps 211, 212, and 213, the target voltage V of the temperature control door 142 is determined based on the required heat amount [x] obtained in step 210 and the operating characteristics of the heat exchanger l. 0° suction door 111
, the positions of the mode door 151 and the differential 0 star door 156 are determined.

In step 214, if the discharge temperature [Te3 detected by the discharge temperature sensor 160] is equal to or lower than the target discharge temperature [TCo] of the operating characteristics of the heat exchanger 1, the compressor relay 13
2b is turned off, and if it is equal to or higher than the [Tco], the compressor relay 132b is turned on.

In step 215, on/off of the humidifier relay 191 is determined based on the humidifier control characteristics shown in FIG.

In this example, H2 is 4'θ%RH, and β is the first
This is the safe amount determined in Figure 4. In step 216, the analog voltage to be output to the rotation speed control circuit 123 of the motor 122 is determined based on the operating characteristics of the heat exchanger 1. In step 217, the transistor group of the interface circuit 23 is controlled according to the output pattern determined in steps 211 to 216, and the control actuator of each controlled element is controlled.

The timer interrupt flow diagram shown in FIG. 9 will be explained.

In step 220, the registers of the microcomputer 22 are controlled so that the next timer interrupt is accepted. In step 221, the contents of each register of the microcomputer 22 that is executing the main program at the time when this interrupt occurs is saved to the AM. Step 222
Now, the voltage Vt of the potentiometer 147 corresponding to the position of the temperature control door 142 is converted into a digital value (Vy) by the A/D converter 21 and input to the microcomputer 22. In step 223, the target voltage VTO determined in step 211 is compared with the target voltage Vt, and the solenoid valve 145
, 146, the position of the temperature control door 142 is controlled. In step 224, the reference position of the temperature control door 142 is determined by the method proposed in Japanese Patent Application No. 55-159523.
The currently stored maximum heating position and maximum cooling position are compared with the current position detected in step 222, and the maximum cooling position is updated. In step 225, interrupt counting is performed to measure a predetermined time as the timing of integral addition used in step 209 described above. Step 2
At step 26, interrupt counting is performed to time a predetermined time as the humidity sample time used at step 206 described above. Since this interrupt occurs at regular time intervals as described above, the number of interrupts is counted, and when the number of interrupts corresponds to a predetermined time, the predetermined time can be counted.

In this embodiment, the predetermined time of step 225 is several seconds, and the predetermined time of step 226 is several minutes.

In step 227, the contents of the 9th register are saved in R and AM in step 221 and returned to the registers, and the process returns to the next main flow process at the time of occurrence of this interrupt.

According to an embodiment of the present invention, it is possible to estimate the actual atmospheric humidity at an early stage, prevent fogging of windows without delay in response, and improve the responsiveness of dehumidification to quickly create a comfortable humidity inside the car interior. There is an effect that can be provided.

〔Effect of the invention〕

According to the present invention, means for predicting actual humidity based on the amount of change per unit time in detected humidity is provided, and the humidity control element is controlled according to the output of this means. Even if the responsiveness of the humidity control device is poor, the responsiveness of the humidity control device is not deteriorated, so it is possible to provide a humidity control device that sensitively follows humidity changes.

[Brief explanation of drawings]

FIG. 1 is a block diagram illustrating the principle of humidity control according to the present invention, FIG. 2 is a drawing showing a specific example in which the humidity control device according to the present invention is combined with an air conditioner for an automobile, and FIG. Figure 2 is a drawing showing the installation state of the temperature and humidity sensor module, Figure 4 is a configuration diagram of the humidity sensor module in Figure 2, Figure 5 is a diagram showing the electrical resistance characteristics of the humidity sensor in Figure 4, Figure 6 is
The figure shows the ffl[output voltage characteristics of the sensor module in Fig. 2, Figs. 11 to 12 are characteristic diagrams showing the control characteristics of the heat exchange section in FIG. 2, and FIG. 13 is a control characteristic diagram showing the control characteristics of the heat exchange section and humidifier in FIG. 2. FIG. 14 is a characteristic diagram showing the characteristics of the safe amount α of relative humidity shown in FIG. 13, and FIG. 15 is a drawing for explaining the principle of automatic temperature control of the air conditioner shown in FIG. 1... Heat exchange section, 2... Control section, 3... Operation section,
22... Microcomputer, 131... Evaporator, 180... Humidity sensor module, 183...
...Humidity sensor, 190...humidifier.

Claims (6)

[Claims] 1. A humidity detection means for detecting the humidity of a space, and a humidity control element for controlling the humidity of the space based on the output of the humidity detection means, the amount of change per unit time in the output of the humidity detection means. further comprising: a humidity change amount detection means for detecting a change amount per unit time in the humidity of the space; further comprising means for predicting the humidity within the space based on an output of the humidity change amount detection means; the humidity prediction means; A humidity control device, characterized in that the humidity control element is controlled based on the output of the humidity control element. 2. In what is stated in claim 1,
A humidity control device comprising a temperature detection means for detecting the temperature of a space to be subjected to humidity control, and an output of the humidity change amount detection means is corrected by an output of the temperature detection means. 3. In the device described in Claims 1 and 2, an operating state detecting means for detecting the operating state of the humidity control element is provided, and the output of the humidity change amount detecting means is determined based on the output of the means. A humidity control device characterized by correcting humidity. 4. Humidity detection means for detecting the humidity of a space; monitoring means for monitoring the output of the humidity detection means at predetermined intervals; storage means for storing the output of the monitoring means; and the output from the monitoring means and the storage means. Humidity change amount detection means for comparing the output from the monitoring means of at least one previous cycle stored in the storage unit and calculating the difference therebetween; and means for predicting the actual humidity based on the output of the change amount detection means. and a control means for controlling a humidity control element based on the output of the prediction means. 5. In what is stated in claim 4,
A humidity control device comprising a temperature detection means for detecting the temperature of a space to be subjected to humidity control, and an output of the humidity change amount detection means is corrected by an output of the temperature detection means. 6. In the device described in claims 4 to 5, an operating state detecting means for detecting the operating state of the humidity control element is provided, and the output of the humidity change amount detecting means is determined based on the output of the means. A humidity control device characterized by correcting humidity.