JPS61265439A - Air-conditioning control device - Google Patents

Abstract

PURPOSE:To permit to reduce a work for changing a set value by a method wherein a temperature, lower than a room-cooling set temperature by a given value, is read in as an upper limit value of an intermediate period while a temperature, higher than a room-heating set temperature by a given value, is read in as the lower limit value of the intermediate period, on the basis of room-cooling and -heating set temperatures information. CONSTITUTION:During a period wherein temperature and humidity informations of an indoor temperature and humidity detector 11 and an outdoor temperature and humidity detector 12 are inputted from an input circuit 14, a mode deciding means 15 reads in an indoor heating set temperature, the lower limit value of intermediate period, which is higher than the indoor heating set temperature by a given value, a room cooling set temperature and the lower limit value of intermediate period, which is lower than the room-cooling set temperature by a given value. Then, the mode-deciding means 15 operates the enthalpies of atmosphere and indoor air and confirms the indoor temperature to decide respective modes of heating, intermediate period and cooling while the ON, OFF of a total heat exchanger 22, the operation of an atmosphere intake damper 21 and the opening degree of a heat medium flow amount control valve 20 are determined in accordance with said respective modes and the modes are outputted from an output circuit 19. According to this method, it is not necessary to change the set values substantially throughout a year and energy-saving property may be improved by providing the mode of intermediate period.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an air conditioning control device used in buildings and the like.

BACKGROUND ART Conventionally, in order to realize energy savings, comfort, and ease of maintenance of air conditioners in buildings, etc., emphasis has been placed on the performance of air conditioner control devices.

A conventional air conditioning control device will be described below.

Conventional air conditioning control devices are generally connected to an indoor temperature detector, a heat medium flow rate control valve, and a central control device.
For example, 26°C in summer, 21°C in winter, 24°C in spring and autumn) is transmitted to the air conditioning control device, and the air conditioning control device receives the indoor temperature obtained from the information transmitted from the indoor temperature detector, The indoor temperature setting value described above is compared, the heating medium flow rate control valve opening degree is determined according to the difference between the two, and the opening degree information is transmitted to the heating medium flow rate control valve.

Problems to be Solved by the Invention However, with the above configuration, it is necessary to change the set value depending on the season and the climate of the day, and it is difficult to maintain a relatively comfortable indoor temperature even without temperature control. Even during the intermediate period when the indoor temperature is maintained, the heat medium flow control valve may operate depending on the indoor temperature setting, resulting in wasted energy consumption.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to provide an air conditioning control device that can reduce the work of changing set values and improve energy saving.

Means for solving the problem In order to solve this problem, the air conditioning control device of the present invention has the following features:
An input circuit that inputs the temperature/humidity information signal from the detector and the cooling/heating set temperature information signal from the central control unit, and the heating/cooling set temperature information sets the temperature lower than the cooling set temperature by a certain value to the upper limit in the intermediate period, and the heating A temperature that is a certain value higher than the set temperature is set as the lower limit value for the intermediate period, and when the temperature based on the temperature and humidity information input to the input circuit is higher than the upper limit value for the intermediate period, the cooling mode is set, and when it is lower than the lower limit value for the intermediate period, the temperature is set as cooling mode. a mode determining means that determines that the mode is heating mode, and a mode determining means that determines that the mode is the intermediate period mode when it is higher than the intermediate period lower limit value and lower than the intermediate period upper limit value, and that the mode determining means determines that the mode is the cooling mode; Determine the heat medium flow rate according to the difference between the temperature based on the information and the cooling set temperature or heating set temperature,
A heating medium flow rate control means that sets the heating medium flow rate to zero when the mode determining means determines that the mode is in the mid-opening period; an outside air intake amount control means that determines the amount of outside air intake based on the temperature and humidity information inputted to the input circuit, the cooling set temperature and the heating set temperature; Control obtained by the exhaust heat recovery control means, heating medium flow rate control means, outside air intake amount control means, and exhaust heat recovery control means that determine whether or not to perform exhaust heat recovery based on humidity, cooling set temperature, and heating set temperature. It consists of an output circuit that outputs a value.

Function: With this configuration, two types of information, cooling set temperature and heating set temperature, are sent from the central control device, and the air conditioning control device always has two types of set values, so it can be set depending on the season or day. Even in seasons (intermediate seasons) when there is no need to change the temperature and the indoor temperature is required to be maintained near the midpoint between the cooling set temperature and the heating set temperature, the indoor temperature can be maintained by cooling outside air through outside air intake control or by recovering exhaust heat. can be kept.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIG. 1 and FIG. 7.

FIG. 1 shows a block diagram of an air conditioning control device in one embodiment of the present invention. In FIG. 1, reference numeral 11 denotes an indoor temperature/humidity detector, which constantly outputs an indoor temperature/humidity information signal to an input circuit 14 in the air conditioning control device 13. Reference numeral 12 denotes an outside temperature/humidity detector, which, like the indoor temperature/humidity detector 11, always outputs outside temperature/humidity information to the input circuit 14. The input circuit 14 inputs the indoor temperature/humidity detector 11 at regular intervals.
and temperature/humidity information from the outside temperature/humidity detector 12 are input.

23 is a central control unit, which transmits set value information to the air conditioning control device 13 and also receives control status information from the air conditioning control device 13. Based on the temperature and humidity information input to the input circuit 14 and the setting value information from the central control device 23, the mode determination means 15 determines whether the mode is heating mode, intermediate mode, or cooling mode, and the heating medium flow rate control means 16. Outside air intake amount control means 17. The exhaust heat recovery control means 18 determines optimum heat medium flow rate, outside air intake amount, and control values for exhaust heat recovery. 19 is an output circuit, 2o is a heat medium flow rate control valve, 21 is an outside air intake damper, and 22 is a total heat exchanger.

The output circuit 19 is connected to the heat medium flow rate control means 18. Outside air intake amount control means 17. The control value obtained by the exhaust heat recovery control means 18 is used as an electric signal to control the heat medium flow rate control valve 20. Outside air intake damper 21. Output to total heat exchanger 22.

FIG. 2 is a schematic flowchart of the mode determination means 14, heat medium flow rate control means 16, outside air intake control means 17, and exhaust heat recovery control means 18. Further, FIG. 3 is an explanatory diagram of determination by the mode determination means 140.

In FIG. 2, first, the outside air enthalpy and the indoor enthalpy are determined from the outside temperature and humidity and the indoor temperature and humidity. Next, the indoor temperature is checked, and the mode determining means shown in FIG. 3 determines whether the mode is heating mode, intermediate mode, or cooling mode. In heating mode, total heat exchanger control and heat medium flow rate control valve control are performed based on the enthalpy comparison between outside air and indoor air, and in intermediate mode, total heat exchanger control and outside air intake damper control are also performed. In the case of cooling mode, total heat exchanger control, outside air intake damper control, and heat medium flow rate control valve control are performed.

In FIG. 3, 31 and 32 are the indoor heating set temperature and indoor cooling set temperature, respectively, sent from the central controller. These values are each referred to as THlTc. 36 is an intermediate period lower limit value, which is a temperature higher by a certain value (here, 1° C.) than the room heating set temperature. 37 is the mid-term upper limit value, which is a constant value (here, 1℃) than the indoor cooling set temperature.
) at a low temperature. The mode is determined by comparing the intermediate period lower limit value 36, the intermediate period upper limit value 37, and the room temperature. When the indoor temperature is higher than Tc-1 ('c), it is in cooling mode, when it is lower than TH+ 1 ('C), it is in heating mode, and when it is between TH+1 [℃] and Tc-1 ('C), it is in intermediate mode. Determine mode.

FIG. 4 is a flowchart for controlling the total heat exchanger, which is the exhaust heat recovery means. In Figure 4, TR is the room temperature, T
H is indoor heating set temperature 31, Tc is indoor cooling set temperature 3
2. R is the indoor enthalpy and I() is the outside air enthalpy. The intermediate value between TH and TO is set as a reference temperature, and if TR is lower than the reference temperature, then the values 0 and 2 are compared, and if IO is smaller, the total heat exchanger 22 is turned on, and if not, it is turned off. If TR is higher than the reference temperature, work ○, work H
According to the comparison, if 0 is large, the total heat exchanger 22 is turned on, otherwise it is turned off.

FIG. 5 is a flowchart of outside air intake damper control, which is outside air intake amount control means. The outside air intake damper 21 is stepped up and stepped down.

The opening degree is opened and closed in stages by sending three types of signals that do not change. In Figure 5,
TR, TH, Tc, I R, and I□ are the same as in FIG. FIG. 6 is a diagram showing mode classification according to indoor temperature for outside air intake damper control.

Only when IO is smaller than IR, the following control is performed. As shown in Figure 6, the difference between TH and Tc is 4
When the indoor temperature is in the area 1, the opening degree of the outside air intake damper 21 is opened one step (step up), and when it is in the area 2, the opening degree of the outside air intake damper 21 is changed. First, when it is in the region 3, the opening degree of the outside air intake damper 21 is closed by one step (step down).

FIG. 7 shows the relationship between the indoor temperature and the opening degree of the heat medium flow control valve 20 in the heat medium flow control valve control, which is the heat medium flow rate control means. The opening degree is calculated in proportion to the deviation between the indoor temperature and the indoor heating set temperature 31 or the indoor cooling set temperature 32 based on the relationship shown in FIG.

As described above, the input circuit 14 is connected to the indoor temperature/humidity detector 11
．． Every time the temperature/humidity information is input from the outside temperature/humidity detector 12, the above control is repeated to turn on/off the total heat exchanger 22 and operate the outside air intake damper 21. , determine the opening degree of the heat medium flow control valve 2o,
This information is sent to the output circuit 19, and the information is outputted from the output circuit 19 to the total heat exchanger 22, the outside air intake damper 21, and the heat medium flow rate control valve 20.

According to the configuration of the above embodiment, the air conditioning control device always performs cooling and
By having a heating set temperature, determining whether the mode is heating, intermediate mode, or cooling depending on the indoor temperature at that time, and performing control, it is possible to keep the room comfortable without having to change the set value greatly depending on the season. It is possible to maintain the temperature. In addition, in spring and autumn, the mode is often in the intermediate period, and during this period, indoor temperature control is performed only by exhaust heat recovery and outside air intake, which has a large energy saving effect.

Effects of the Invention As described above, according to the present invention, by having two types of set values, heating set temperature and cooling set temperature, there is almost no need to change the set values throughout the year, and there is no need to change the set values throughout the year. By providing the period mode, when the indoor temperature is in this mode, no heat is consumed, so energy saving is improved, which is extremely useful in terms of M.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an air conditioning control device according to an embodiment of the present invention, and FIG. Fig. 3 is an explanatory diagram of the mode judgment means, Fig. 4 is a schematic flowchart of the exhaust heat recovery means, Fig. 6 is a schematic flowchart of the outside air intake amount control means, and Fig. 6 is the outside air intake damper control. FIG. 7 is a diagram showing the relationship between the indoor temperature of the heating medium flow rate control means and the opening degree of the heating medium flow rate control valve. 11... Indoor temperature and humidity detector, 12...
Outside temperature and humidity detector, 13... Air conditioning control device, 1
4... Input circuit, 16... Mode determination means, 16... Heat medium flow rate control means, 17...
... Outside air intake amount control means, 18 ... Exhaust heat recovery control means, 19 ... Output circuit, 23 ...
・Central control unit, 31... Indoor heating set temperature,
32...Indoor cooling temperature setting, 33...
Heating mode, 34... Intermediate mode, 35...
...Cooling mode, 36...Intermediate period lower limit value,
37... Interim period upper limit. Name of agent: Patent attorney Toshio Nakao and one other person
-fl'll skin setting My4-fMTA・21--Ichirei Minato 1 7G-471jl1ro! Ful1 3”b--4g rectangle 1 Fig. 4

Claims (1)

[Claims] An input circuit that inputs a temperature/humidity information signal from a temperature/humidity detector and a signal of cooling/heating set temperature information from a central controller; A temperature higher than the heating set temperature by a certain value is set as the lower limit of the intermediate period, and when the temperature based on the temperature/humidity information input to the input circuit is higher than the upper limit of the intermediate period, the cooling mode is set, and the lower limit of the intermediate period is set. mode determining means for determining heating mode when the value is lower than the intermediate value, and determining intermediate mode when higher than the intermediate lower limit value and lower than the intermediate upper limit value; In this case, the heat medium flow rate is determined according to the difference between the temperature based on the temperature and humidity information input to the input circuit and the cooling set temperature or the heating set temperature, and the mode determining means determines the heat medium flow rate in accordance with the difference between the temperature and humidity information input to the input circuit, and If the mode is determined to be the cooling mode, the heating medium flow rate control means sets the heating medium flow rate to zero, and if the mode determining means determines that the cooling mode is the early cooling mode or the intermediate cooling mode, the an outside air intake amount control means that determines an outside air intake amount based on temperature and humidity based on temperature and humidity information, the cooling set temperature and the heating set temperature; and an exhaust heat recovery control means for determining execution or non-execution of exhaust heat recovery based on the temperature and humidity, the cooling set temperature and the heating set temperature; the heat medium flow rate control means; the outside air intake amount control means; An air conditioning control device comprising an output circuit that outputs a control value obtained by an exhaust heat recovery control means.