JP2566192B2 - Pressurized floor blowout air conditioner controller - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioning system for a room having a double floor structure of a building substrate and a floor panel, such as a computer room or an OA room, which is blown out from an air conditioner installed outdoors or indoors. The present invention relates to a device for controlling the blown amount and blown temperature of the air conditioner in an air conditioning system that blows the conditioned air under the floor and blows the conditioned air into the room through a blowout port provided on the floor panel.

[0002]

2. Description of the Related Art In recent years, in order to rationalize office work in offices, so-called OA offices where computers are used to carry out work have been developed. This O
For the purpose of A conversion, a dedicated room for handling large OA equipment such as a computer room is prepared in each building, and OA equipment is widely used in general offices. Therefore, it may be difficult to maintain a comfortable environment in the OA office due to the amount of heat generated by the OA equipment.

Therefore, an air conditioning system as shown in FIG. 5 has been introduced. That is, a double floor is formed in the OA office 1, and the air conditioner 2 is installed outside the OA office. This double floor is a so-called free access floor configured by combining an appropriate number of floor panels, and these floor panels have an outlet 3 at a position where it is possible to efficiently cool OA equipment in the room. It is arranged. The conditioned air blown from the air outlet 2a of the air conditioner 2 to the underfloor 4 is OA from these air outlets 3.
The air is blown into the room of the office 1 to air-condition the room.

Further, pressure detecting ports 1a and 4a are provided in the room and the underfloor 4.
The pressure detecting ports 1a and 4a are connected to the differential pressure transmitter 5 in the control panel by the air pipes 5a and 5b. Then, the detected differential pressure is transmitted to the pressure regulator 6 inside the control panel, and this pressure regulator 6 calculates the deviation between the pressure difference between the room and the underfloor and the set target pressure difference. A signal that is increased or decreased according to the magnitude of the deviation is output, and this signal is input to the inverter 7a of the air conditioner 7 to control the air flow rate. As a result, the pressure difference between the room and the underfloor is automatically adjusted when the number of outlets 3 and wiring openings for OA equipment is increased or decreased, compared to the case where the above-mentioned blow rate is manually adjusted. Efficient air conditioning will be performed.

Further, a temperature detector 8 is arranged in the room at a position in consideration of the arrangement of OA equipment and the like, and the temperature of the room is detected. Then, the detected room temperature is transmitted to the temperature controller 9 inside the control panel. The temperature controller 9 calculates the temperature difference between the room temperature and the set target temperature, and outputs a signal increased or decreased according to the magnitude of the temperature difference. This signal is input to the opening controller 10a of the flow control valve 10. This opening degree adjuster 10a includes the flow rate adjusting valve 10a.
It controls the flow rate of the refrigerant. As a result, the temperature inside the room is automatically adjusted, so that more efficient air conditioning is performed as compared with the case where the flow rate of the refrigerant is manually adjusted.

[0006]

However, in the above-mentioned air conditioner, the amount of air blown from the air conditioner is controlled only by the pressure difference between the room and the underfloor, regardless of the change in the room temperature. The amount of air blown at that time must be constantly blown. Further, in order to adjust the pressure difference, the air blowing capacity of the air conditioner must be larger than the air blowing amount at the maximum heat load.

When the indoor air temperature becomes higher than the set target temperature, the signal output from the temperature controller adjusts the flow rate control valve to increase the refrigerant flow rate and lower the blast temperature of the air conditioner. When the temperature of the blown air decreases, the temperature difference between the upper and lower positions in the room increases, and further, the temperature of the floor surface decreases, which makes it impossible to maintain a comfortable environment in the room.

Further, when the indoor air temperature becomes lower than the set target temperature, the flow rate control valve is adjusted by the signal output from the temperature controller, the refrigerant flow rate is decreased, and the blast temperature of the air conditioner is raised. However, if the temperature of the blown air rises, the dehumidifying capacity of the air conditioner decreases and it is not possible to maintain a comfortable indoor environment.

Therefore, the present invention prevents the expansion of the temperature difference between the upper and lower positions in the room, the lowering of the floor surface temperature, the lowering of the dehumidifying ability, and the control device capable of controlling the air conditioner so as to achieve energy saving. Is intended to provide.

[0010]

In order to achieve the above-mentioned object, a control device for an air conditioner according to the present invention uses a double floor as the floor in the room to be conditioned, and adjusts the air conditioner under the floor panel from the air conditioner. In the air conditioner that supplies air and pressurizes the underfloor, and conditioned air is blown out into the room from the air outlet provided in the floor panel, a differential pressure that detects the differential pressure between the underfloor pressure and the room pressure. A detection means is provided, and a temperature detection means for detecting the temperature inside the room is provided, and the pressure deviation between the value detected by the differential pressure detection means and the set differential pressure value and the temperature deviation between the value detected by the temperature detection means and the set temperature are set. Deviation comparison means for comparing the deviations is provided, the deviation comparison means preferentially selects the larger deviation between the pressure deviation and the temperature deviation, and an adjustment signal relating to the larger deviation is output, and the adjustment signal causes the air conditioner to operate. Blast of Of controlling the air volume is characterized by, further and also characterized by changing the set value of the air temperature of the air conditioner stepwise by a signal of the temperature deviation.

[0011]

[Function] An appropriate number of floor panels are arranged on the floor in the room to be air-conditioned to form a double floor, and the floor panel is arranged at a position in consideration of the arrangement of OA equipment and the position of the operator. The panel is provided with the air outlet, and the conditioned air sent under the floor from the air conditioner arranged outdoors is blown out into the room through the air outlet. Thereby, the air conditioning of this room is performed.

In the deviation comparing means, the larger one of the pressure deviation and the temperature deviation is selected. When the adjustment signal related to the selected large deviation is output, the blower is operated according to the adjustment signal,
The air volume is changed. Therefore, the required minimum pressure difference between the underfloor and the room is ensured, and the room temperature is controlled comfortably.

Further, if the set value of the air temperature of the air conditioner is changed stepwise by the signal of the temperature deviation to control the air supply temperature to the underfloor, the dehumidifying ability can be secured and the floor surface temperature can be controlled. The temperature inside the room is controlled to prevent the temperature drop.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A control device for a pressurized floor blowout air conditioner according to the present invention will be specifically described below with reference to the illustrated embodiments.

FIG. 1 shows a first embodiment of this control apparatus, which is an interior 11 of an OA office 11 in which OA equipment is installed.
The floor of a is a free access floor configured as a double floor by arranging an appropriate number of floor panels above the floor surface 12 of the building. In consideration of the arrangement of the OA equipment and the position of the worker, a conditioned air outlet 13 is provided on the floor panel at a position where the OA equipment and the worker can keep a comfortable state.

An air conditioner 14 is installed outside the OA office 11, and a conditioned air supply port 14a of the air conditioner 14 is installed.
Is directed to the underfloor 15 and supplies conditioned air to the underfloor 15. Pressure detection ports 16a and 16b are provided at appropriate positions in the room 11a and underfloor 15, respectively.
These pressure detection ports 16a and 16b are connected to the differential pressure transmitter 17, which is a differential pressure detection means provided inside the control panel, by the air pipes 17a and 17b, and the difference between the pressure inside the room 11a and the pressure below the floor 15 is connected. As the pressure is detected, the signal related to this differential pressure is converted into an electric signal. The detected value related to this differential pressure is input to the differential pressure adjuster 18 in the control panel, and the pressure deviation between the preset differential pressure value set in the differential pressure adjuster 18 and the detected value is detected.

On the other hand, a temperature detecting / adjusting device 19, which is a temperature detecting means, is provided at an appropriate position in the room 11a, and a preset temperature and a temperature deviation detected by the temperature detecting / adjusting device 19 are set. The electric resistance signal related to is input to the potentiometer converter 21 via the switching relay 20 in the control panel. The potentiometer converter 21 converts the input electric resistance signal into a current signal and outputs it.

Then, the pressure deviation detected by the differential pressure regulator 18 and the temperature deviation converted into a current signal by the potentiometer converter 21 and outputted are a selector which is deviation comparing means provided inside the control panel. It has been entered in 22. In the selector 22, the larger one of the pressure deviation and the temperature deviation is selected with priority, and the adjustment signal relating to the selected large deviation is sent to the inverter 23 of the air conditioner 14.
Sent to Then, the inverter 23 receives this adjustment signal and increases or decreases the amount of air blown by the blower 24 of the air conditioner 14.

Further, in this first embodiment, a temperature sensor 25 is arranged at an appropriate position in the room 11a, and a signal relating to the deviation between the set temperature and the detected temperature is inputted to the air conditioner 14, and this input is made. A signal sets the pre-programmed temperature so that the blast temperature changes in stages
The air flow temperature of the air conditioner 14 is adjusted to this set temperature by adjusting the flow rate of the refrigerant by operating 27a to open and close the adjusting valve 27 of the refrigerant supply pipe.

An indoor air exhaust port 26 is provided at an appropriate position in the indoor room 11a, and the air exhausted from the indoor air exhaust port 26 is returned to the intake port 14b of the air conditioner 14.

Reference numeral 14c in FIG. 1 indicates an air conditioner 14
It shows the outside air intake of.

FIG. 2 shows a second embodiment of the present invention. The same parts as those of the first embodiment are designated by the same reference numerals and the description thereof will be omitted. The pressure deviation detected by the differential pressure adjuster 18 is input to the selector 22, and the electric resistance signal related to the temperature deviation detected by the temperature detecting / adjusting controller 19 is converted into a current signal by the potentiometer converter 21 and isolators are supplied. The output of the isolator 31 is input to the selector 22 and the ratio bias 32, and the output of the ratio bias 32 is input to the air conditioner 14.

The selector 22 preferentially selects the larger of the pressure deviation and the temperature deviation, and the adjustment signal is input to the inverter 23. Therefore, the amount of air blown by the blower 24 is controlled by the adjustment signal. Further, the air blow temperature of the air conditioner 14 is set to a temperature programmed in advance so as to be changed stepwise by the deviation signal sent from the ratio bias 32, and the refrigerant flow rate is adjusted to reach this air blow temperature. .

Reference numeral 14c in FIG. 2 is an air conditioner 14
It shows the outside air intake of.

FIG. 3 shows a third embodiment. In this embodiment, a so-called remote control type is used as the temperature detector 19a as the temperature detecting means, and the temperature detector 19a is placed at an appropriate position such as the ceiling surface of the room 11a. Is provided with a receiver 19b that receives the temperature signal transmitted from the temperature detector 19a. Then, the electric signal relating to the detected room temperature is inputted from the receiver 19b to the VAV controller 33 in the control panel, where the temperature deviation is detected and converted into a current signal. The output signal of the VAV controller 33 is input to the isolator 31, the output of the isolator 31 is input to the selector 22 and the ratio bias 32, and the output of the selector 22 is the air conditioner.
It is input to the inverter 23 of 14, and the output of the ratio bias 32 is input to the air conditioner 14.

FIG. 4 shows a fourth embodiment. In this embodiment, the room temperature detected by the temperature detector 19c which is the temperature detecting means is transmitted through the digital controller 37,
It is input to the cooling temperature controller 34 and the heating temperature controller 35. And, the output terminals of these temperature controllers 34, 35,
It is connected to the fixed contacts 34a, 35a of the changeover switch 36.
An isolator is provided on the movable contact 36a side of the changeover switch 36.
31 is connected, and selector 22 is connected to this isolator 31.
And the ratio bias 32 are connected to each other, and a signal of a temperature deviation is input from either the cooling temperature controller 34 or the heating temperature controller 35 by switching the changeover switch 36.

The operation of the embodiment of the control device for the pressurized floor air-conditioning system according to the present invention constructed as above will be described below.

When the air conditioner 14 is operated, conditioned air is blown from the supply port 14a to the underfloor 15, and the conditioned air that has passed through the underfloor 15 is discharged from the air outlet 13 provided on the floor of the OA office 11 into the room. The air is blown to 11a, and the air conditioning in the room 11a is performed. Further, the air exhausted from the exhaust port 26 arranged in the room 11a is returned to the air conditioner 14 from the intake port 14b, and after being readjusted, is blown to the underfloor 15 from the supply port 14a.

In the first embodiment shown in FIG. 1, the pressures at the respective locations are detected by the differential pressure transmitter 17 from the pressure detecting ports 16a and 16b provided in the room 11a and the underfloor 15 and the room 11a and the underfloor 15 respectively. The differential pressure between and is detected. When this differential pressure is converted into an electric signal and input to the differential pressure adjuster 18, the set differential pressure value preset in the differential pressure adjuster 18 and the detected differential pressure value are compared and the deviation is A signal related to the detected pressure deviation is sent to the selector 22. Further, an electric resistance signal related to the temperature deviation detected by the temperature detecting / adjusting device 19 provided in the room 11a is input to the potentiometer converter 21 via the switching relay 20 in the control panel. The potentiometer converter 21 converts the input electric resistance signal into a current signal and outputs it. A signal relating to this temperature deviation is sent to the selector 22.

In the selector 22, the pressure deviation and the temperature deviation are compared with each other, and the larger deviation is selected, and the adjustment signal relating to the larger deviation is sent to the air conditioner 14.
Is input to the inverter 23. As a result, the air flow rate of the blower 14 is changed so as to reduce the large deviation related to the adjustment signal. Therefore, the air conditioning of the room 11a is achieved and a comfortable work space can be provided.

Further, in the first embodiment, the temperature sensor is
The room temperature is detected by 25, and a signal relating to the deviation between the set temperature and the detected temperature is input to the air conditioner 14. This input signal sets the blast temperature to a temperature programmed in advance to change in stages,
By operating the temperature controller 27a to open / close the control valve 27 of the refrigerant supply pipe, the flow rate of the refrigerant is adjusted so that the air blowing temperature of the air conditioner 14 becomes the set temperature.
Therefore, the humidity in the room 11a is appropriately maintained.

In the second embodiment shown in FIG. 2, the electric resistance signal relating to the temperature deviation detected by the temperature detecting / adjusting device 19 is converted into a current signal by the potentiometer converter 21 and output. A signal related to this temperature deviation is input to the selector 22. Further, the pressure deviation between the room 11a and the underfloor 15 detected by the differential pressure adjuster 18 is also input to the selector 22. Then, the selector 22 sends an adjustment signal relating to the larger of the temperature deviation and the pressure deviation to the inverter 23 of the air conditioner 14. Therefore, the amount of air blown by the blower 24 of the air conditioner 14 is changed to reduce the deviation related to the adjustment signal, and the air conditioning of the room 11a is achieved.

The signal relating to the temperature deviation output from the potentiometer converter 21 is input to the isolator 31 and further input to the air conditioner 14 through the ratio bias 32. Based on this temperature deviation signal, the blowing temperature of the air conditioner 14 is set to a temperature programmed in advance so as to be changed stepwise, and the flow rate of the refrigerant is adjusted to reach this blowing temperature.

In the embodiment shown in FIG. 3, the electric signal relating to the room temperature detected by the temperature detector 19a is received by the receiver 19b, and the VAV controller 33 is received from the receiver 19b.
Is converted into a current signal and the temperature deviation from the set temperature is detected. The temperature deviation signal converted into the current signal is input to the isolator 31, and the output of the isolator 31 is input to the selector 22. Further, the pressure deviation between the room 11a and the underfloor 15 detected by the differential pressure adjuster 18 is also input to the selector 22. The adjustment signal having the larger one of the temperature deviation and the pressure deviation detected by the differential pressure adjuster 18 is sent from the selector 22 to the inverter 23, and the amount of air blown by the blower 24 is changed.

The temperature deviation signal output from the VAV controller 33 is input to the isolator 31 and the ratio bias 32 to the air conditioner 14 to change the temperature of the blower 24 in stages.

In the embodiment shown in FIG. 4, the room temperature detected by the temperature detector 19c is transmitted through the digital controller 37 and sequentially input to the cooling temperature controller 34 and the heating temperature controller 35. At this time, when the changeover switch 36 is switched to the cooling temperature controller 34, the temperature deviation between the detected temperature of the room temperature and the set temperature is detected in the cooling temperature controller 34, and the other changeover switch 36 is for heating. Temperature controller 35
When it is switched to, the heating temperature controller 35
The temperature deviation is detected at. Then, a signal relating to the detected temperature deviation is input to the isolator 31. Further, the temperature deviation signal and the signal relating to the pressure deviation detected by the differential pressure adjuster 18 are input to the selector 22, and the pressure deviation and the temperature deviation are compared and the adjustment relating to the larger deviation is input. A signal is output from the selector 22,
It is input to the inverter 23. Therefore, the amount of air blown by the blower 24 is changed so as to reduce the deviation related to this adjustment signal.

The temperature deviation is input to the isolator 31, and its output is supplied via the ratio bias 32 to the air conditioner.
Entered in 14. With this input signal, the blowing temperature is set to a temperature programmed in advance so as to be changed stepwise, and the opening regulator 27a is operated to adjust the control valve 27 of the refrigerant supply pipe.
By controlling the flow rate of the refrigerant by opening and closing the
The blast temperature of becomes the set temperature.

[0038]

As described above, according to the control device for the pressurized floor blowout air conditioner according to the present invention, when the room temperature rises above the set value, the air volume of the blower is increased to control the indoor air conditioning. Since this is done, it is possible to prevent the temperature difference between the upper and lower positions in the room from increasing and prevent the floor surface temperature from decreasing. When the room temperature falls below the set value, the temperature of the conditioned air supplied to the underfloor is controlled to increase, preventing the floor surface temperature from decreasing and increasing the temperature difference between the upper and lower positions in the room. Can be prevented.

Further, the dehumidifying capacity in the room can be sufficiently ensured by controlling the air temperature of the air conditioner according to the change of the room temperature.

In addition, it is sufficient to secure the minimum differential pressure between the room and the underfloor for the amount of air blown from the air conditioner, so energy can be saved.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a first embodiment of a control device for a pressurized floor blowout air conditioner according to the present invention.

FIG. 2 is a block diagram showing a schematic configuration of a second embodiment of the control device for the pressurized floor air-conditioning system according to the present invention.

FIG. 3 is a block diagram showing a schematic configuration of a third embodiment of the control device for the pressurized floor blowout air conditioner according to the present invention.

FIG. 4 is a block diagram showing a schematic configuration of a fourth embodiment of the control device for the pressurized floor blowout air conditioner according to the present invention.

FIG. 5 is a block diagram showing a schematic configuration of a control device for a conventional pressurized floor air-conditioning system.

[Explanation of symbols]

 11 OA office 11a Indoor 13 Air outlet 14 Air conditioner 14a Supply port 14b Suction port 15 Underfloor 16a, 16b Pressure detection port 17 Fine differential pressure transmitter (differential pressure detection means) 18 Differential pressure regulator 19 Temperature detection and regulator (temperature) Detection means) 19a, 19C Temperature detector (temperature detection means) 21 Potentiometer converter 22 Selector (deviation comparison means) 23 Inverter 24 Blower 25 Temperature sensor 26 Discharge port 27 Control valve 31 Isolator 32 Ratio bias 33 VAV controller 34 Cooling temperature Controller 35 Temperature controller for heating 36 Changeover switch 37 Digital controller

Claims (2)

(57) [Claims] 1. An air outlet in which the floor to be air-conditioned is a double floor, and conditioned air is supplied from the air conditioner to the underfloor of the floor panel and the underfloor is pressurized, and the conditioned air is disposed on the floor panel. In an air conditioner that blows out more indoors to perform air conditioning, a differential pressure detection unit that detects the differential pressure between the underfloor pressure and the indoor pressure is provided, and a temperature detection unit that detects the indoor air temperature is provided. Deviation comparing means for comparing the pressure deviation between the detected value and the set differential pressure value and the temperature deviation between the detected value by the temperature detecting means and the set temperature is provided, and the larger one of the pressure deviation and the temperature deviation is provided by the deviation comparing means. The control device for the pressurized floor blowout air conditioner is characterized in that the deviation of the air conditioner is selected with priority, an adjustment signal related to the large deviation is output, and the air volume of the blower of the air conditioner is controlled by the adjustment signal. 2. An air outlet in which the floor to be conditioned is a double floor, and conditioned air is supplied from the air conditioner to the underfloor of the floor panel and the underfloor is pressurized, and the conditioned air is disposed on the floor panel. In an air conditioner that blows out more indoors to perform air conditioning, a differential pressure detection unit that detects the differential pressure between the underfloor pressure and the indoor pressure is provided, and a temperature detection unit that detects the indoor air temperature is provided. Deviation comparing means for comparing the pressure deviation between the detected value and the set differential pressure value and the temperature deviation between the detected value by the temperature detecting means and the set temperature is provided, and the larger one of the pressure deviation and the temperature deviation is provided by the deviation comparing means. Deviation is preferentially selected, an adjustment signal related to the large deviation is output, the air volume of the air blower of the air conditioner is controlled by the adjustment signal, and the set value of the air temperature of the air conditioner is set by the temperature deviation signal. To Control device for pressurized floor blowing air-conditioning system and changes in Kaiteki.