JPS61107409A - Air-conditioning control system - Google Patents

Abstract

PURPOSE:To eliminate the need for use of the wet air chart in setting a setting value by obtaining a setting dew point temperature from a conversion table based on a temperature corresponding to the setting temperature of an air- conditioning object point and a dry bulb temperature so as to control the humid ity in response to the detected output of an air-intake dew point sensor. CONSTITUTION:A room setting temperature is read from a variable memory RAM, the setting temperature is corrected to the read data depending on the loss in a duct DC, the conversion table stored in the memory is used to obtain a dew point temperature by using the corrected setting temperature as a dry bulb temperature. Then the obtained dew point temperature is used as a setting value, which is stored in the variable memory RAM, the system is subject to control operation based on the setting value and the detected output of a sensor T0 detecting an air-intake dew point temperature provided in the duct DC to control a solenoid valve MV3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an air conditioning control system that primarily controls the humidity of air supplied from an air conditioner.

[Conventional technology]

Conventionally, when controlling the humidity of the supply air supplied from an air conditioner to an area to be air-conditioned, the supply air blown out from the air conditioner generally contains a lot of dust if the air speed is high, and especially This tendency is noticeable in air ducts, and if a wet bulb temperature sensor or humidity sensor is used to measure humidity, dust will adhere to the detection area and the detection status will be inaccurate, so it is recommended not to use a dew point temperature sensor. Accordingly, in controlling the humidity of the air conditioner, the dew point temperature of the predetermined humidity corresponding to the set temperature of the target area is set as the set value, and this set value and the detection power of the dew point temperature sensor are set. Therefore, humidity is controlled.

[Problem that the invention seeks to solve]

However, in the past, when determining the dew point temperature of a predetermined humidity corresponding to the set temperature of the air-conditioned area, the dew point temperature was artificially determined using a humidity diagram, and this was used as the set value to manually operate the control device. This has the disadvantage that this series of operations is troublesome since it is not properly set.

The present invention has the purpose of fundamentally solving the drawbacks of the conventional technology and provides an extremely effective air conditioning control system.

[Means for solving problems]

Therefore, the present invention is constructed by the following means.

That is, a dew point temperature sensor is provided to detect the dew point temperature of the supply air blown out from the air conditioner, and a conversion table between dry bulb temperature and dew point temperature at a predetermined humidity is provided, and the YJA degree corresponding to the set temperature of the air conditioned area is provided. Dew point temperature is determined from a conversion table using dry bulb temperature, and a control device is installed that uses this as a set value and controls humidity according to the detected power of the dew point temperature sensor, and is also equipped with a corresponding air conditioner. It is.

[Effect]

Therefore, by simply providing the set temperature of the area to be air-conditioned, the set value of the dew point temperature is automatically determined, and the humidity is controlled accordingly.

〔Example〕

Hereinafter, the present invention will be explained in detail with reference to figures showing examples.

Figure 1 is an instrumentation diagram, in which cold water CW is supplied via electric valve MVz.
A cooling coil CC is supplied with hot water HW, and a heating coil HC is supplied with hot water HW via a fuel valve MVi.

One air conditioner AC has a humidifying spray SP that supplies water W via an electric valve MVa, and a fan F.
The supply air blown out by the fan FK is supplied to each room via the duct DC under the control of the control device CNTK.

In addition, an insertion-type dew point temperature sensor TO that detects the outlet dew point temperature of the supply air is installed near the air conditioner AC of the DC, and its detection power is applied to the control device CNT. In response to this, the control device CNT controls the electric valve MVs to adjust the humidity of the supplied air.

In addition, the control device CNT controls the electric valve MVt or MVz according to the detected force of the temperature sensor omitted in the figure, adjusts the temperature of the supply air, and depending on conditions, the electric valve M
V1. The MVs are simultaneously controlled, and the cooling coil CC performs dehumidification and the heating coil HCK performs heating.

FIG. 2 is a block diagram of the control device CNT, which includes a processor such as a microprocessor CPUt, a fixed memory ROM1, a variable memory RAM, and an interface I.
/Fl to I/Fg are arranged around the periphery, and these are connected by a bus line), and the instructions in the fixed memory ROM are transferred to the processor C.
The PU executes the control operation while accessing predetermined data to the variable memory RAM.

In addition, the interface I/FIK requires a setting device ST that has a keyboard and display (it can be connected as required), which allows data setting and storage, as well as data verification. At the same time, the output power of the dew point @ temperature sensor TO and the status signal from the fan F are given to the interface I/F s, while the 7771% electric valve MV l - For MY a,
A control signal is sent out.

FIG. 3 is a flowchart of the humidity control situation by the processor CPU, in which 1 indoor set temperature is read out from the variable memory RAM (101), and 1 set temperature correction (102) is made in response to DC loss, etc. After doing it, make a fixed memo! JROM or variable memory IJ) LAM
Using a conversion table which will be described later and which is stored in , step 103 is performed to determine the dew point temperature from the conversion table with the positive set temperature as the dry bulb temperature.

Then, store it in the memory 111 as the obtained "'" point temperature set value, store it in the variable memory IJRAM, perform "control calculation based on the set value and the detected force of To" 112, and according to this result. After performing 113 "send control signal to electric valve MVa", steps 101 and subsequent steps are repeated.

FIG. 4 is a diagram showing the data of the conversion table. For example, the relationship between the dry bulb temperature θd and the dew point temperature θ0 at 50% relative humidity is shown in the figure, and each address corresponding to θd is shown in FIG. By storing the value of θ0 corresponding to , the value of θ0 corresponding to this can be read out by specifying an address according to the value obtained in step 102.

Note that the memory address is divided into multiple areas, and a different humidity table is stored in each area. By using means such as specifying, it becomes possible to obtain θ0 corresponding to a safe predetermined humidity, and it is also possible to completely change the predetermined humidity according to air conditioning conditions.

Therefore, in steps 112 and 113, the humidity is controlled in such a direction that the set value and the detected value by the astigmatic temperature sensor TO match, the outlet astigmatic temperature is automatically maintained at the set value, and the humidity! There is no need for manual operation using the D telegraph diagram, and the set temperature of the area to be air conditioned can be set using the setting device ST, and the set value for automatic busy humidity control is determined. At the same time, the operational effort is eliminated,
It is easy to change the set value and predetermined humidity, and it is possible to set suitable air conditioning conditions at will.

However, depending on the conditions of the area to be air-conditioned, the air may be blown directly without going through the duct DC. However, the ridges can be freely modified, such as by replacing them with other steps such as the steps in FIG. 3.

〔Effect of the invention〕

It is clear from the above explanation that according to the present dAK, when setting the set value for humidity control, the use of the psychrometric diagram is eliminated, and the system only gives a fixed temperature of the target part. , since the non-point heating setting for 1st shift is automatically set,
It greatly reduces operational effort and provides significant benefits for various air conditioners.

[Brief explanation of drawings]

The figures show an embodiment of the present invention; Fig. 1 is an instrumentation diagram, Fig. 2 is a block diagram of the control device, Fig. 3 is a flowchart of the control situation, and Fig. 4 is a diagram showing data of a conversion table. It is. 2 AC... Air conditioner i) C* Fist* Duct, TO
...Astigmatism temperature sensor, CNT@, ...control device q, c
c...Cooling coil, HC...Heating coil, SP
...Spray, F...Fan, CPU11...
e-processor, OM...Fixed memory, RAM...
Fist/variable memory, ST...setting device. Patent applicant Yamatake Honeywell Co., Ltd. Bokin Itsuka Kenkei Mori 4H←No.

Claims (1)

[Claims] The area to be air conditioned is equipped with an air conditioner that has a temperature and humidity control function, a dew point temperature sensor that detects the dew point temperature of the supply air blown out from the air conditioner, and a conversion table between dry bulb temperature and dew point temperature at a predetermined humidity. and a control device that calculates the dew point temperature from the table using the dry bulb temperature as the temperature corresponding to the set temperature of An air conditioning control system featuring: