JPH03181782A - Dehumidification control system of dehumidifying device - Google Patents

Abstract

PURPOSE:To perform an accurate discrimination of dehumidifying capability by a method wherein a dehumidifying is controlled in reference to a surrounding air humidity before entering an evaporator, the surrounding air humidity, a temperature of cooling air passing through the evaporator, a temperature coeffi cient at a temperature of the humidified air passed through a condenser, and an added constant in a dehumidifying device. CONSTITUTION:A temperature T1 of surrounding air before entering an evapora tor 1 of a dehumidifying device is detected by use of an inlet temperature sensor 34, a surrounding air humidity Q is detected by use of a surrounding air humid ity sensor 43, a temperature T2 of the cooling surrounding air passed through the evaporator 1 is detected by use of an intermediate temperature sensor 35, a temperature T3 of a humidified air passing through a condenser 2 is sensed by an outlet temperature sensor 36, thereby temperature coefficients (a1) to (a3) at these three measured temperature T1 to T3 and the added constant (a) of the dehumidifying device 4 are selected by the surrounding air temperature and humidity. A humidifying capability of the dehumidifying device 4 is discrimi nated in reference to these selected numerical values and the detected tempera ture value so as to control humidity.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a dehumidification control method for a dehumidifier.

BACKGROUND OF THE INVENTION Conventionally, in a dehumidifying device that obtains dehumidified air through an evaporator and a condenser, outside air is b4 J@ before entering the evaporator.
；哩連／T3) ノ が彷林会嬰る；彽う r、
It was a method to control dehumidification by measuring the temperature (T2) and the temperature (T3) of the heated air passing through the condenser to calculate the dehumidifying capacity of the dehumidifier.

Problems to be Solved by the Invention For example, in a dehumidifying device used in a grain dryer, the grains housed in the dryer are repeatedly circulated in the drying chamber and flowed down, and the dehumidified air generated from the dehumidifying device is As the grains flow through the drying chamber, the grains flowing down the drying chamber are exposed to the dehumidified air and dried.

During this dehumidifying and drying work, the temperature of the outside air before entering the evaporator of the dehumidifier (T1), the temperature of the cooled air after passing through the evaporator ('r3), and the temperature of the cooled air after passing through the condenser are determined. The temperature (T3) of the heated air was measured, the ability of this dehumidifier was determined based on the temperature results measured by these three people, and dehumidification control was performed based on this determination result, but the temperature and humidity of the outside air at that time etc., the temperature of the outside air may be particularly high or low, or the humidity of the outside air may be t! F separate I, 4-hole light Marino γ do snore Henjo de fuuto h o ^
In some cases, it may not be possible to accurately determine the dehumidifying capacity of the dehumidifying device, and as a result, accurate dehumidification control may not be possible.

Means for Solving the Problems The present invention provides a dehumidifying device that obtains dehumidified air through an evaporator 1 and a condenser 2, in which the outside air temperature (T3) and the outside air humidity (Q) of the outside air before entering the evaporator 1 are , while measuring the temperature of the cooling air that has passed through the evaporator 1 (T2), the temperature of the heated air that has passed through the condenser 2 (T3), etc., and the temperature at each of these temperatures (TI) to (T3). Coefficient (a1) ~
The dehumidification control method is characterized in that dehumidification is controlled by (a3) and an addition constant (α) by the dehumidification device.

Effect of the Invention While the circulation of grains being fed out and flowing down inside the drying chamber of the grain dryer is repeated, the dehumidifying air generated from the dehumidifier passes through this drying chamber, so that the grains flowing down inside this drying chamber are It is dried by being exposed to dehumidified air.

During this dehumidifying and drying work, the outside air temperature (T1) and outside air humidity (Q) before entering the evaporator 1 of the dehumidifying device, the evaporator l
The temperature of the cooling air after passing through (T2) and the temperature of the heated air after passing through the condenser 2 (T3) are measured, and the temperature coefficient at the measured temperatures (T1) to (T3) of these three is determined. (a3)～
(a3) and the addition constant (α) of this dehumidifier, the dehumidification capacity of this dehumidifier is determined, and dehumidification control is performed based on this determination result, but depending on the temperature and humidity of the outside air detected at the time of this determination. Temperature coefficient (a1) ~ (
a3) and the addition constant (α) are changed to determine the dehumidifying ability of the dehumidifying device, and the grains are dried while dehumidifying control is performed based on the determination result.

Effects of the Invention According to the present invention, when determining the dehumidifying ability of a dehumidifying device, the temperature and humidity of the outside air before and after passing through the evaporator I are determined based on the temperature and humidity of the outside air detected at the time of this determination.

), (T2) and the temperature 5 after passing through the condenser 2 (T3)
Temperature coefficients (a3) to (a3) and addition constant (α) to correct
By changing and making the determination, the dehumidifying ability of the dehumidifier can be accurately determined, and dehumidification control is performed based on this accurate determination, so that grain drying can be performed in a good manner.

Embodiment A dehumidifier RA4 attached to the grain dryer 3 will be described on the same side.

The dryer 3 has a rectangular shape that is long in the front-rear direction, and has a transfer gutter 6 and a ceiling plate 7 equipped with a rotatable transfer spiral at the upper end of the machine wall 5, and a ceiling plate 7 on the lower side of which the grains are stored. A storage chamber 8 for storage is formed, and drying chambers 11 are provided below the storage chamber 8 between the ventilation chambers 9 on both left and right sides and the ventilation chamber 10 in the center and communicated with the storage chamber 8. Each drying chamber 1
A feed-out valve 12 for feeding and flowing grains is rotatably supported at the bottom of each drying chamber 11, and a grain collection gutter 13 rotatably equipped with a transfer spiral is provided below each drying chamber 11 for communication. be.

The front machine wall 5 is provided with an operating device 14 for starting and stopping the dehumidifying device 4 and the dehumidifying device @ 4 and the dryer 3 for each operation of drying and discharging. tile A, Yu 4, 1n, I+: Ichiwaku Nanto Naya configuration, an exhaust duct chamber 15 is formed on the rear side of the rear machine wall 5, and this exhaust tract chamber 1
An exhaust fan 16 and an exhaust motor 17 for rotationally driving the exhaust fan 16 are provided on the rear side of the exhaust fan 5 , and the exhaust fan 16 and the exhaust chamber 9 communicate with each other via the exhaust passage chamber 15 . A valve motor 19 for rotationally driving each delivery valve 12 via a speed reduction mechanism 18 is provided at the lower part of the rear machine wall 5.

A supply port for supplying the transferred grains into the storage chamber 8 is provided in the center of the transfer gutter 6, and a diffusion plate 20 is provided below the supply port to uniformly diffuse and return the grains into the storage chamber 8. This is a configuration with a

The grain hoisting machine 21 is provided in the front part of the front machine wall 5, and a packet conveyor 22 belt is stretched between the upper and lower pulleys inside.
A dispensing tube 23 is provided between the upper end and the starting end of the transfer gutter 6 for communication, and a supply gutter 24 is provided between the lower end and the terminal end of the grain collection gutter 3 for communication. It is.

A grain raising machine motor 25 is installed on the upper part of this grain raising machine 21 L+ 9
/7″1q Deaf phoenix + i” k Tatami -～-
22 belts, the transfer spiral in the transfer gutter 6, the expansion fi 20, and the transfer spiral in the grain collecting gutter 13 are rotationally driven via the packet conveyor 22 belt, and the vertical direction is A moisture sensor 26 for detecting grain moisture is provided at the center of the grain, and the moisture sensor 26 rotates when a moisture motor 27 built into the moisture sensor 26 is rotated by the transmission of an electrical measurement signal from the operating device 14. This moisture sensor 26 is configured to be rotationally driven.

The dehumidifier 4 has a box shape, and the front wall plate of the box body is provided with an inlet 28 for sucking outside air, and the rear wall plate is provided with an inlet 28 for inhaling outside air, which is sucked into the dehumidifier 4 and converted into dehumidified air. The structure includes an air outlet 29 for blowing the dehumidified air into the air blowing chamber 1o.

In order to convert the outside air sucked into the dehumidifying device 4 through the suction port 28 into dehumidified air, the low-temperature low-pressure gas that is the refrigerant is adiabatically compressed into high-temperature high-pressure gas in the compressor 3o, and then transferred to the condenser 2.
When passing through the evaporator 1, it loses heat and changes into a high-temperature, high-pressure liquid.Then, the pressure is reduced to a low-temperature, low-pressure liquid at the expansion valve 31, and then when it passes through the evaporator 1, it absorbs heat and becomes a low-temperature, low-pressure gas. This cycle is repeated as the refrigerant changes in sequence, thereby dehumidifying the outside air passing through the dehumidifier 4 and turning it into dehumidified air.

Note that the outside air sucked into the dehumidifier 4 is cooled when passing through the evaporator 1, moisture in the air condenses, and the absolute humidity becomes low-temperature, low-humidity air with reduced absolute humidity. This structure absorbs heat when passing through the second part to obtain low dehumidified air with a temperature slightly higher than room temperature.

The compressor 30 is rotatably driven by a compressor motor 32, and a heater 33 is provided in front of the air outlet 29 to auxiliary heat the dehumidified air. a population temperature sensor 34 that detects the outside air temperature (T3) of the air, an intermediate temperature sensor 35 that detects the cooling air temperature (T2) of the cooling air after passing through the evaporator l, and a heating air that has passed through the condenser 2. Air heating air temperature (T
3) is provided with an outlet temperature sensor 36 for detecting the temperature.

The operating device L4 has a box shape, and the surface plate of the box has a
A start switch 37 and a stop switch 38 for starting the dryer 3 and the dehumidifying device 4 separately for each operation of drying and discharging; a moisture setting switch 39 for setting the finishing target moisture content of grains according to the operating position; The configuration includes a display window 41 and a monitor display that alternately displays type setting information 40, detected grain moisture, detected drying temperature, drying remaining time, etc., and outside the bottom plate is provided with an outside air temperature for detecting outside air humidity. The configuration includes a sensor 43, and internally includes an A-D converter, each input circuit,
The drying control device 42 includes a CPU, an output circuit, etc., and each setting 39, 40 is a rotary switch type, and a predetermined value, type, etc. are set according to the operating position.

The drying control by the drying control device 42 is performed as follows. When the operation of the moisture setting switch 39 is input to the drying control device 42, the finishing target moisture of the grain is set, and the moisture sensor The grain moisture detected by 26 is manually compared with the finishing target moisture by 1+, and E l-, 1, -fr
It is configured to automatically stop the dryer 3 with the vinegar filter A9 of the 7.

The dehumidifying capacity of the dehumidifying device 4 is calculated by the following formula (A), which is set and stored in the drying control device 42, where (F) indicates the dehumidifying capacity, and (T1) indicates the inlet temperature. Indicates the temperature detected by the sensor 34, (T2) indicates the temperature detected by the intermediate temperature sensor 35, (T3) indicates the temperature detected by the outlet temperature sensor 36, and (a3) to
(a3) indicates a temperature correction coefficient for correcting each detected temperature (T3) to (T3), and (α) indicates the amount of heat of the compressor 30, from the vibration connecting the evaporator 1 and the condenser 2, etc. Indicates the addition constant that corrects the heat input and output of , and these (a1) to (a
3) and (α) are structures that vary depending on the detected outside air temperature and the detected outside air humidity.

F (T+, Tz, Ta) = at ・T++az'
T2+as'd3+α...(a) When the calculation result using the formula (a) is as shown below, the dehumidifying device 4 is operating at the maximum amount of water removal, but the limit is exceeded, so the set humidity is cannot be obtained. When the calculation result of the above formula (A) is as follows, the dehumidification device 4 is the maximum capacity and the maximum amount of water removed, and the maximum air volume within the set humidity range.

F (T,, T2.T3) = 0 When the calculation result of the above formula (a) is as shown below, the dehumidifier 4 is in a low air volume state with low humidity dehumidifying air, and is not suitable for dehumidifying and drying. is not ideal and has some margin.

F (T,, T2.T3)<0 For example, the inlet temperature sensor 34 detects the outside air temperature as 30°C, and the outside air temperature sensor 43 detects the relative humidity as 6°C.
0%, the inlet temperature sensor 34 detects the outside air temperature (T1) as 30°C, the intermediate temperature sensor 35 detects the cooling air temperature (T3) as 25°C, and the outlet temperature sensor 36 detects the heated air temperature (T3) as 37°C, the drying control is performed according to each detected temperature value (T3) to (T3) as shown in Figs. 2, 3, 4, and 5. The temperature coefficients (a1) to (a
3) and an addition constant (α) are selected, and depending on the above detection values, (a3) is 0.95 and (a2) is 0.
8, (as) is selected as -1,1, and (α) is selected as -9, and each of these detected numerical values and each selected numerical value is (
B) Substituted into the formula and calculated as (-1, 2), this -1, 2 is -1, 2 < 0, and therefore it is determined that the dehumidifying capacity of the dehumidifying device 4 has a margin. Based on this determination, dehumidification control of the dehumidifier 4 is performed.

F (TI, Tz, Ti) = 0.95X 30+
o, gx 25+ (-1,1)X 37+ (-91 = 28.5+ 20+ (-40,71+ (-91
=-1, 2< 0 In addition, the inlet temperature sensor 34 detects the outside air temperature as 20°C, the outside air temperature sensor 43 detects the relative humidity as 70%, and the inlet temperature sensor 34 detects the outside air temperature as 70%. Temperature (T
3) is detected as 20°C, the intermediate temperature sensor 35 detects the cooling air temperature (T2) as 14°C, and the outlet temperature sensor 36 detects the heating air temperature (T3) as 26°C,
Based on these detected temperature values (T3) to (T3), the drying control device 4
Temperature coefficients (a1) to (a3) set to 2 and stored
The configuration is such that the addition constant (α) is selected, and depending on the above detected values, (al) is 1.0, (a2) is 0.85,
(as) is selected to be -1, 0, and (α) is selected to be -6, and each of these detected numerical values and each selected numerical value is substituted into equation (a) to obtain <-0, 1 as shown below. This −0,i
= o, and therefore, it is determined that the dehumidifying ability of the dehumidifying device 4 is maximized, and as a result of this determination,
The dehumidification control of the dehumidifier 4 is not performed and the current state is continued.

Further, when it is detected that F (TI, T2.T31>O), it is detected that the dehumidification capacity of the dehumidifier 4 has exceeded the limit, and based on this detection, the dehumidification control of the dehumidifier 4 is performed. It is the composition.

F (T,, Ta, T31= 1.OX 20+ 0.
85X 14+ (-1,01X 26+ (-61 = 20+ 11.9+ [-26) + (-61) Below, the operation of the above embodiment will be explained.

Each part of the grain dryer 3, the dehumidifier 4, the moisture sensor 26, etc. are started by operating each setting switch 39, 40 of the operating device 14 to a predetermined position and operating the start switch 37 that starts dehumidifying and drying. The dehumidified air generated from the dehumidifying device 4 passes through the two ventilation ports, the ventilation chamber 10, the drying chamber 11, the ventilation chamber 9, the ventilation path chamber 15, and is sucked and exhausted by the ventilation fan 16. As a result, the grains stored in the storage chamber 8 are exposed to the dehumidified air and dried while flowing down from the storage chamber 8 into the drying chamber 11, and are fed out to the lower part by the feeding valve 12 and flowed down. From inside the grain collection gutter ■3, through the supply gutter 24, to the grain raising machine 21.
The packets are transported to the inside by the lower transfer spiral, are transported to the upper part by the packet conveyor 22, are supplied into the transfer gutter 6 via the dispensing tube 23, and are transferred from the transfer gutter 6 onto the diffusion plate 20 by the upper transfer spiral. The moisture sensor 26 receives the finishing date m, L+ set by operating the moisture setting switch 39.
Drying of the grains is stopped by automatically controlling the drying control device 42 in the storage section 14 to automatically stop the dryer 3.

During this dehumidifying and drying work, the temperature (TI) of the outside air before entering the evaporator 1 of the dehumidifier 4 is detected by the population temperature sensor 34, the outside air humidity (Q) is detected by the outside air humidity sensor 43, and the outside air humidity (Q) is detected by the outside air humidity sensor 43. The temperature (T2) of the cooling air that has passed through the evaporator 1 is detected by the intermediate temperature sensor 35, and the temperature (T2) of the heated air that has passed through the condenser 2.

) is detected by the outlet temperature sensor 36, and the temperature coefficient (at) ~ (
a3) and the addition constant (α) by this dehumidifier 4 are selected based on the outside air temperature and humidity at this time, and the dehumidifying ability of this dehumidifier 4 is determined based on these selected values and the detected temperature value, and this determination Depending on the result, the grains are dried while controlling the dehumidification of the dehumidifier 4.

[Brief explanation of drawings]

The figures show an embodiment of the present invention, in which Fig. 1 is a block diagram, Fig. 2 is a relationship diagram between outside air humidity and outside air temperature, and (al) temperature coefficient, and Fig. 3 is an outside air humidity and outside air temperature. and (a
2) A diagram of the relationship with the temperature coefficient; Figure 4 is a diagram of the relationship between outside air humidity and temperature and the (ax)2M degree coefficient; Figure 5 is a diagram of the relationship between outside air humidity and temperature and the (α) addition constant; Fig. 6 is an overall side view of the grain dryer, Fig. 7 is a sectional view taken along line A-A in Fig. 6,
FIG. 8 is a rear view of a portion of the grain dryer, and FIG. 9 is an enlarged front view, partially cut away, of a portion of the grain dryer. Explanation of symbols ■ Evaporator 2 Condenser

Claims (1)

[Claims] In a dehumidifying device that obtains dehumidified air through an evaporator 1 and a condenser 2, the outside air temperature (T
_1), outside air humidity (Q), the temperature of the cooling air that has passed through the evaporator 1 (T_2), and the temperature of the heated air that has passed through the condenser 2 (T_3), etc., while measuring each of these temperatures. (
Temperature coefficient (a_1) to (T_1) to (T_3)
a_3) and an addition constant (α) by the dehumidifier.