JPS6239771B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a temperature and humidity program controller that performs program control of temperature and humidity.

Conventionally, a two-phenomenon program signal generator generates temperature and humidity program pattern signals, and these signals are used as setting inputs for two temperature and humidity controllers, and the adjustment signals are determined by comparison with the temperature and humidity measurement input signals. The output was used to control the temperature and humidity of the controlled object. However, this method requires three devices, one program signal generator and two controllers, has many connections between devices, requires a large storage space, and is complicated and costly. There was a drawback.

In view of the above points, an object of the present invention is to provide a temperature/humidity program controller that can program and adjust temperature/humidity with one unit and is miniaturized.

FIG. 1 is a block diagram showing an embodiment of the present invention. In the figure, input terminals 11 and 12
are supplied with a dry bulb temperature input signal T _D and a wet bulb temperature input signal T _W measured by a temperature/humidity transmitter, etc., respectively, and a remote dry bulb temperature setting input signal T _SD and a remote humidity input signal are supplied to input terminals 13 and 14, respectively. A bulb temperature setting input signal T _SW (or relative humidity signal T _RH ) is supplied, and these input signals are input to the switch of the input selector 2.
The signal is taken in by switching S ₁ , S ₂ , S ₃ , and S ₄ and converted into a digital signal by the AD converter 3. Further, the dry bulb temperature value T _D ′, the relative humidity value T _RH ′, or the remote setting input signal is manually set by the setting device 4 with reference to the display 5, and the central processing such as a microcomputer is used. It is stored in the memory 7 by the device 6. The central processing unit 6 receives a dry bulb temperature input signal T _D and a wet bulb temperature input signal T _W which are taken in by the input switch 2 and converted into digital signals by the A-D converter 3 according to a predetermined operation program. For example, the dry bulb temperature value T _D ' and the relative humidity value T _R are the setting contents manually set by the setting device 4 and stored in the memory device 7.
A calculation is performed from _H ', an adjustment signal is outputted from the adjustment output section 8, and a switching signal can be outputted from the switching signal output section 9 in accordance with the set values T _D ' and T _RH '.

FIG. 2 is a block diagram for explaining the operation. A-D
The dry bulb and wet bulb temperature input signals T _D and T _W converted into digital signals by the converter 3 are subjected to input calculations such as linearization by the central processing unit 6, and relative humidity is calculated from both signals. During local operation, the local L dry bulb temperature value T selected and set by the setting device 4
_D ′, wet bulb temperature value T _RH ′ or during remote operation, the remote R setting input signals T _SD , T _RH are compared with the dry bulb temperature T _D and relative humidity calculation value, respectively, and sent to the heater or humidifier, etc. An adjustment signal is output. Further, the dry bulb temperature signals of the input signals T _D and T _W and the relative humidity signal obtained by calculating the relative humidity can be output in analog form to the outside and recorded on a recorder or the like.

FIG. 3 is a block diagram for explaining another operation.
The dry bulb and wet bulb temperature input signals T _D and T _W converted into digital signals by the A-D converter 3 are sent to the central processing unit 6.
Input calculations such as linearization are performed by setting device 4.
The wet bulb temperature is calculated from the local L dry bulb temperature value T _D ' and the relative humidity value T _RH ' set by .
The local L dry bulb temperature value T _D 'wet bulb temperature calculation value selected and set by the setting device 4 or the remote R setting input signal T _SD , T _SW and the dry bulb and wet bulb temperature input signals T _D , T _W are compared and calculated, and an adjustment signal is output to a heater, humidifier, etc.

FIG. 4 is a block diagram for explaining the operation of a constant temperature and humidity chamber as a control object. As shown in FIG. 5, in general, as the temperature increases, the relative humidity tends to decrease.
The constant temperature and humidity chamber 10 has a heater 11, a humidifier 12, and several compressors 13.
Since the evaporator 14 is operated by
It is necessary to switch the refrigerating capacity of the evaporator 14 and the dehumidifying capacity of the evaporator 14. Therefore, the central processing unit 6 outputs adjustment signals for the heater and humidifier, and also outputs a refrigerating capacity switching signal for selecting the size of the compressor 13 in accordance with the dry bulb temperature set value T _D '.
Dry bulb temperature set value T _D ′ and relative humidity set value T _RH ′
A dehumidification capacity switching signal is output to select the size of the evaporator 14 depending on the temperature and humidity of the object to be controlled.

Further, as shown in FIG. 6, the setter 4 stores a program pattern of stepped dry-bulb temperature values and relative humidity values in the memory 7 along with time intervals for holding them. It is possible to perform calculations based on the settings stored in 7 and the input signal and output an adjustment signal according to the program pattern.

In addition, in the above embodiment, calculation of relative humidity,
The wet bulb temperature is calculated using, for example, the following Pernter's equation, which is stored in advance in the memory 7.

H=e/es×100(%RH) ……(1) e=e _W −AP(1+T _W /C)(T _D −T _W )
...(2) where H: Relative humidity (T _RH etc. in the above example) e: Saturated water vapor pressure of air e _W : Saturated water vapor pressure at wet bulb temperature es: Saturated water vapor pressure at dry bulb temperature T _W : Wet bulb Temperature T _D : Dry bulb temperature P: Air pressure A, D: Constant determined by wind speed As described above, the present invention takes the dry bulb temperature input signal and the wet bulb temperature input signal using the input switch and converts them from A to D. The controller converts the temperature and relative humidity program pattern into a digital signal, and the setting device stores the temperature and relative humidity program pattern in the memory, and the central processing unit calculates the input signal and the set value stored in the memory according to the program pattern. This is a temperature/humidity program controller that outputs adjustment signals.

Therefore, since it is possible to set and adjust program patterns with a single unit, it can be made smaller, easier to handle, occupy less space on panels, etc., and requires almost no wiring, making it inexpensive and expensive. Be reliable. Moreover, since it is a digital type using a central processing unit such as a microcomputer, it is possible to set the program pattern and adjust the output with high precision.

[Brief explanation of the drawing]

Fig. 1 is a block configuration diagram showing one embodiment of the present invention, Figs. 2, 3, and 4 are block diagrams for explaining the operation, Fig. 5 is a diagram of the relationship between temperature and relative humidity, and Fig. 6 is an explanatory diagram of a program pattern. 11, 12, 13, 14...input terminal, 2...
Input switch, 3... A-D converter, 4... Setting device, 5... Display, 6... Central processing unit, 7...
Memory device, 8...Adjustment output section, 9...Switching signal output section.

Claims (1)

[Claims] 1. An input switch that takes in a dry bulb temperature input signal and a wet bulb temperature input signal, and A that converts both of the signals taken in by this input switch into a digital signal.
- A D converter, a setting device for setting the program pattern of dry bulb temperature values and relative humidity values, a memory device for storing the settings set by this setting device, and a storage device for storing the settings stored in this memory device. A temperature/humidity program controller comprising a central processing unit that performs calculations based on the input signal and outputs an adjustment signal according to the program pattern.