JPH0875222A - Control device for underfloor air conditioning system - Google Patents

Abstract

(57) [Abstract] [Object] The present invention relates to a control device for an underfloor air-conditioning system.
It is an object of the present invention to provide a control device for an underfloor air-conditioning system that prevents changes in heating) and prevents mixing loss. [Configuration] A lower limit temperature setting means 2 for setting a lower limit temperature that absolutely requires heating, an indoor temperature sensor 109 for measuring an indoor temperature, and a control mode determining means 1 for determining a control mode.
The control mode determining means 1 is configured to set the heating mode as the control mode only when the room temperature falls below the lower limit temperature.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for an underfloor air-conditioning system for supplying air heated or cooled from the floor surface by utilizing a free access floor as an air supply chamber in an office building.

[0002]

2. Description of the Related Art In recent years, an underfloor air conditioning system has been widely used for air conditioning in an office building from the standpoint of both comfort and energy saving, and a highly functional control device thereof is required. The configuration will be described below with reference to FIG.

As shown in the figure, the air handling unit 101 includes a cold / hot water coil 102 and the cold / hot water coil 1.
It has a blower 104 that sends the air that has undergone heat exchange by 02 to the room 103, and sends the air to the room 103 via the underfloor chamber 105. Then, the air handling unit 101 and the room 103 are connected by a return air duct 106, and a occupant on the floor outlet can adjust the air volume (strong / medium / weak / stop) by using a remote controller 107 to the floor fan. 108 is installed. An indoor temperature sensor 109 that measures the temperature of the room 103 is installed in the room 103, and an air supply temperature sensor 11 that measures the temperature (air supply temperature) of the air supplied to the room 103 is installed in the underfloor chamber 105.
0 is set. Then, the control device 111 takes in signals from the indoor temperature sensor 109 and the supply air temperature sensor 110 and changes the opening degree of the valve 112 and the blower 10 for changing the amount of hot water or cold water flowing through the cold / hot water coil 102.
The frequency of the inverter 113 for changing the air flow rate of No. 4 was changed to keep the indoor temperature and the supply air temperature at desired constant values.

Next, the structure and operation of the control device 111 will be described with reference to FIG. As shown in the figure, the room temperature sensor 109 measures the room temperature tr, and the room temperature set value setting means 114 allows the operator to set the temperature set value TRSET of the room 103. Control mode determination means 11
5 determines the control mode (cooling / heating) from the indoor temperature measured value tr and the indoor temperature set value TRSET as follows.

When tr ≧ TRSET When cooling tr <TRSET When heating The valve opening determination means 116 calculates the valve opening by PID calculation or the like from the indoor temperature measurement value tr, the indoor temperature set value TRSET, and the control mode, and the valve is opened. 112 is operated.

The supply air temperature sensor 110 measures the supply air temperature ts, and the supply air temperature setting means 117 allows the operator to set a set value TSSET of the supply air temperature. The rotation speed determination means 118 is
The inverter rotation speed is calculated by PID calculation or the like from the supply air temperature measurement value ts, the supply air temperature set value TSSET, and the control mode,
I was operating the inverter 113.

[0007]

In such a conventional control device for an underfloor air conditioning system, the control mode is determined by comparing the room temperature measurement value tr with the room temperature set value TRSET. Since office buildings have increased OA equipment and the amount of internal heat generation has increased, a change in the control mode occurs, such as heating in the morning during the winter and cooling in the daytime during the day and heating again at night. Since the underfloor air conditioning system takes the form of sending heated or cooled air from the underfloor chamber 105, unlike the conventional air conditioner, the building itself is first heated and cooled. Therefore, if the mode change occurs within one day and the supply air changes from warm air to cold air or from cold air to warm air, there is a problem that mixing loss occurs and energy saving is impaired.

Further, since the air supply temperature set value is constant regardless of the indoor temperature condition, there is a problem that the comfort is impaired.

Further, since each resident uses the remote controller 107 to operate the floor fan 108 without permission, there is a problem that comfort is lost unless the operation is performed properly.

The present invention is to solve the above problems, and it is a first object of the present invention to provide a control device for an underfloor air conditioning system, which can prevent the change of the control mode within one day and prevent the occurrence of the mixing loss. To aim.

A second object is to improve the comfort by changing the supply air temperature set value according to the condition of the room temperature.

A third object is to forcibly strengthen the floor fan in accordance with the indoor temperature condition to improve comfort.

[0013]

In order to achieve the first object, the controller of the underfloor air-conditioning system of the present invention has a first means for measuring the temperature inside the room and an indoor temperature sensor for measuring the room temperature. Room temperature set value setting means for setting the temperature set value, a valve for adjusting the capacity of the air conditioner, an inverter for adjusting the air volume of the air conditioner, and a lower limit temperature setting means for setting the indoor temperature at which heating is required. A control mode determining means for inputting a signal from the indoor temperature sensor and a signal from the lower limit temperature setting means to determine a control mode; a signal from the indoor temperature sensor, a signal from the room temperature set value setting means, and the control mode determining means Of the air supply temperature, a valve opening degree determining means for adjusting the opening degree of the valve by inputting the signal of, and an air supply temperature sensor for measuring the temperature of the air (air supply temperature) supplied to the room by the air conditioner; A supply temperature setting means for setting a constant value, a signal from the control mode determining means, a signal from the supply air temperature sensor, and a signal from the supply air temperature setting means are input to determine a rotation speed for adjusting the rotation speed of the inverter. The control mode is determined by the lower limit temperature lower than the indoor temperature measurement value and the indoor temperature set value.

In order to achieve the second object, the second
In addition to the first means, the means inputs an upper limit temperature setting means for setting an indoor temperature required for cooling, a signal from the upper limit temperature setting means, a signal from the indoor temperature sensor, and a signal from the lower limit temperature setting means. A supply air temperature calculating means for calculating the air temperature setting value is provided instead of the supply air temperature setting means.

In order to achieve the third object, the third
In addition to the first means and the second means, the means of (1) is a floor fan control means for inputting a signal of the indoor temperature sensor, a signal of the lower limit temperature setting means and a signal of the upper limit temperature setting means to adjust the air volume of the floor fan. The configuration is provided.

[0016]

According to the present invention, the control mode can be determined by the room temperature measurement value and the lower limit temperature by the configuration of the first means described above.

The configuration of the second means makes it possible to change the supply air temperature set value depending on the measured indoor temperature, the lower limit temperature, and the upper limit temperature.

Further, the floor fan can be forcibly made strong by the configuration of the third means by the measured indoor temperature value, the lower limit temperature, and the upper limit temperature.

[0019]

【Example】

(Embodiment 1) Hereinafter, a first embodiment of the present invention will be described with reference to FIG.
Will be described with reference to. The same reference numerals as those used in the conventional example indicate the same items, and detailed description thereof will be omitted.

As shown in the figure, the control mode determining means 1
Determines the control mode by inputting the value measured by the indoor temperature sensor 109 and the indoor temperature set by the lower limit temperature setting means 2 that requires heating. Valve opening determination means 116
Adjusts the opening of the valve 112 by inputting the measured value of the indoor temperature sensor 109, the indoor temperature set value set in the room temperature set value setting means 114, and the control mode determined by the control mode determination means 1. The rotation speed determination means 118 inputs the measured value of the supply air temperature sensor 110, the supply air temperature set value set in the supply air temperature setting means 117, and the control mode determined by the control mode determination means 1 to rotate the inverter 113. Adjust the number.

With the above-described structure, the lower limit temperature setting means 2 has an indoor temperature TL (indoor temperature set value T
The temperature lower than RSET) is set by the operator, and the control mode determining means 1 determines the control mode (cooling / heating) tr ≧ TL from the indoor temperature measurement value tr measured by the indoor temperature sensor 109 and the lower limit temperature TL. When it is cooling When tr <TL, it can be decided like heating.

As described above, according to the control device for the underfloor air conditioning system of the first embodiment of the present invention, the control mode is determined by the indoor temperature measured value tr and the lower limit temperature TL set lower than the indoor temperature set value. Therefore, it is possible to prevent the control mode from changing within one day.

(Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIG. The same parts as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

As shown in the figure, the second embodiment is the same as the first embodiment.
In addition to the embodiment, the upper limit temperature setting means 3 for setting the indoor temperature required for cooling, the set value of the upper limit temperature setting means 3, the measured value of the indoor temperature sensor 109 and the set value of the lower limit temperature setting means 2 are input and supplied. The air supply temperature calculating means 4 for calculating the air temperature setting value is provided instead of the air supply temperature setting means 117 of the first embodiment.

With the above structure, the upper limit temperature setting means 3 is set by the operator to the room temperature TH (temperature higher than the room temperature set value TRSET) which requires cooling, and the supply air temperature calculation means 4 sets the room temperature measured value tr. The supply air temperature setting value TSSET can be determined by the lower limit temperature TL and the upper limit temperature TH as described below, and can be sent to the rotation speed determining means 118.

1. tr <TL TSSET = 26 ° C 2. TL ≤ tr <TL + 1 1 every 10 minutes up to 20 ° C
Decrease by ℃ 3. TL + 1 ≦ tr <TH-1 TSSET = 20 ° C. 4. TH-1 ≤ tr <TH 1 every 10 minutes up to 18 ℃
Decrease in ° C 5. TH <tr TSSET = 18 ° C. Thus, according to the control device for the underfloor air conditioning system of the second embodiment of the present invention, the supply air temperature calculating means 4 calculates the supply air temperature set value according to the room temperature. Therefore, the supply air temperature can be changed according to the indoor temperature condition.

(Third Embodiment) Next, a third embodiment of the present invention will be described with reference to FIG. The same parts as those in the second embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

As shown in the figure, the third embodiment is the same as the first embodiment described above.
In addition to the embodiments and the second embodiment, the floor fan control means 5 for adjusting the air volume of the floor fan 107 is provided.

With the above configuration, the floor fan control means 5 determines the air volume of the floor fan 107 when either of the following conditions 1 and 2 is satisfied based on the measured indoor temperature value tr, the lower limit temperature TL, and the upper limit temperature TH. It is configured so that it can be forced to be strong.

Condition 1. tr <TL condition 2. tr> TH As described above, according to the third embodiment of the present invention, the floor fan control means 5 can forcibly make the floor fan 107 stronger depending on the indoor temperature condition, and the comfort can be improved.

Each means of the present invention can be realized by software using a computer or by using a dedicated hardware circuit having each of these functions.

[0032]

As is apparent from the above embodiments, according to the present invention, the control mode is determined by inputting the signal from the indoor temperature sensor and the signal from the lower limit temperature setting means for setting the indoor temperature at which heating is required. Since the control mode determining means is provided, it is possible to provide a control device for an underfloor air conditioning system that does not cause a change in the control mode in one day in the winter season, does not cause a mixing loss of air, and enables energy saving operation.

Further, the supply air temperature calculation for calculating the supply air temperature set value by inputting the signal of the upper limit temperature setting means, the signal of the indoor temperature sensor and the signal of the lower limit temperature setting means for setting the indoor temperature required for cooling Since the means is provided, the supply air temperature can be changed according to the indoor temperature condition, and the comfort can be improved.

Further, since the floor fan control means for adjusting the air volume of the floor fan by inputting the signal of the indoor temperature sensor, the signal of the lower limit temperature setting means and the signal of the upper limit temperature setting means is provided, when the indoor temperature deteriorates. Moreover, the floor fan can be forcibly and strongly operated to immediately recover from the deterioration of the indoor temperature.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a control device of an underfloor air conditioning system according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a control device of the underfloor air conditioning system according to the second embodiment.

FIG. 3 is a block diagram showing a configuration of a control device of an underfloor air conditioning system according to the third embodiment.

FIG. 4 is a schematic diagram showing a configuration of a conventional underfloor air conditioning system and its control device.

FIG. 5 is a block diagram showing a configuration of a control device of the underfloor air conditioning system.

[Explanation of symbols]

 1 Control Mode Determining Means 2 Lower Limit Temperature Setting Means 3 Upper Limit Temperature Setting Means 4 Air Supply Temperature Computing Means 5 Floor Fan Control Means 107 Floor Fans 109 Indoor Temperature Sensors 110 Air Supply Temperature Sensors 112 Valves 113 Inverters 114 Room Temperature Set Value Setting Means 116 Valves Opening degree determination means 117 Supply air temperature setting means 118 Rotation speed determination means

Claims (3)

[Claims] 1. An indoor temperature sensor for measuring an indoor temperature, a room temperature set value setting means for setting an indoor temperature set value, a valve for adjusting the capacity of the air conditioner, and an air volume of the air conditioner. An inverter, a lower limit temperature setting means for setting an indoor temperature that requires heating, a control mode determining means for inputting a signal of the indoor temperature sensor and a signal of the lower limit temperature setting means to determine a control mode, the indoor temperature A valve opening degree determining means for adjusting the opening degree of the valve by inputting the signal of the sensor, the signal of the room temperature set value setting means and the signal of the control mode determining means, and the temperature of the air supplied to the room by the air conditioner. An air supply temperature sensor for measuring (air supply temperature), an air supply temperature setting means for setting a set value of the air supply temperature,
The control mode determination means is provided with a rotation speed determination means for inputting a signal from the control mode determination means, a signal from the supply air temperature sensor, and a signal from the supply air temperature setting means to adjust the rotation speed of the inverter. An underfloor air conditioning system controller configured to operate at a lower limit temperature that is lower than the temperature measurement value and the room temperature set value. 2. An upper limit temperature setting means for setting an indoor temperature required for cooling, a signal from the upper limit temperature setting means, a signal from an indoor temperature sensor, and a signal from the lower limit temperature setting means are input.
The control device for an underfloor air conditioning system according to claim 1, wherein a supply air temperature calculating means for calculating a supply air temperature set value is provided instead of the supply air temperature setting means. 3. A floor fan control means for adjusting the air volume of the floor fan by inputting the signal of the indoor temperature sensor, the signal of the lower limit temperature setting means and the signal of the upper limit temperature setting means.
Or the control device of the underfloor air conditioning system described in 2.