JPH0256571B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is suitable for application to an in-building central management device used in an intelligent building so that the inside of the building can be centrally managed by a building management processor. This invention relates to an outside air amount control device.

[Prior Art] Conventional outside air volume control devices for air conditioners that adjust indoor temperature and humidity can be broadly classified into the following two types.

One type is a type in which a carbon dioxide concentration detection sensor is placed indoors, and the amount of outside air taken into the room is controlled based on the carbon dioxide concentration detected by the sensor.

The other type is one that extracts the number of people entering a room from past data and controls the amount of outside air taken in per hour by dividing it into several steps and controlling it on a schedule.

Now, while the former type of outside air amount control device can control the amount of outside air indoors in real time, since it is detected by an indoor carbon dioxide concentration sensor (CO ₂ sensor), the accuracy of outside air amount control depends on the detection accuracy of this sensor.

CO ₂ sensors with high accuracy have the disadvantage of being expensive, and those with less accuracy have the disadvantage of inconsistent control accuracy due to variations in accuracy.

The latter type of outside air amount control device has the disadvantage that it cannot properly grasp the current situation and cannot realize appropriate air conditioning control because it controls the amount of outside air inside the room depending on past data.

[Problem that the invention seeks to solve]

In view of the above-mentioned conventional problems, it is an object of the present invention to provide an outside air volume control device that can accurately and in real time ascertain the number of people in a room and that can quickly ensure a comfortable indoor environment. .

[Means for solving problems]

The outside air amount control device according to the present invention transmits a code signal of a user wearing it in response to a call signal.
an ID card, a receiving unit that receives a code signal transmitted from the ID card, and a receiving unit that transmits the calling signal and ascertains the number of people in the room based on the received code signal, and receives outside air that is taken in by an air conditioner. The amount of outside air is set according to the number of people in the room, and the set amount of outside air is maintained until the number of people in the room changes by more than a predetermined value, and when the number of people in the room changes by more than a predetermined value. and a control unit that changes the amount of outside air taken in by the air conditioner to an amount according to the number of people in the room.

[Effect]

In the present invention, since the number of people in the room is determined based on the code signal received from the ID card, the number of people in the room can be determined accurately and in real time. In addition, the amount of outside air taken in is set to an amount according to the number of people in the room, and the set amount of outside air is maintained until the number of people in the room changes by a predetermined value or more. When the amount changes above, the amount is changed according to the number of people in the room. Therefore, the amount of outside air is not frequently changed due to a change in the number of people in the room below a predetermined value, the air conditioner is stabilized, and unnecessary air conditioning control is not performed, so energy saving can be achieved.

〔Example〕

FIG. 1 shows an embodiment in which the present invention is applied to an outside air amount control device used in an in-house central control device installed in an intelligent building.

This Intelligent Building automatically manages people entering and exiting the building, and gives predetermined instructions to the building in order to centrally manage the people entering and exiting the building, and to appropriately guide people to evacuation sites in emergencies. There is an in-house central control system that allows commands to be given.

FIG. 1 shows an intelligent building 10 to which an embodiment of the present invention is applied.

In this intelligent building 10, users who enter the building are required to carry an ID card 12 shown in FIG. 2 in advance. this
The ID card 12 is made of a thin plate made of synthetic resin, for example, and has a photograph 14 of the user pasted on its surface, and a display column 16 for the name of the affiliation, etc. corresponding to the photograph 14. A clip 18 is provided on the back side of the ID card 12 so that the ID card 12 can be attached to a chest pocket or the like.

This ID card 12 has a built-in circuit shown in FIG.
The calculation unit 24 calculates the signal from the reception unit 26, determines whether it is a call signal for your own ID card 12, and sends the signal to the notification unit 28 and the transmission unit when necessary. 30 are activated to notify and transmit information to the outside, respectively.

In addition, in this ID card 12, the calculation section 2 is
The power switching section 20 is activated and the power supply section 22 operates the main circuit of the arithmetic section 24 only when the main circuit of the 4th etc. is not energized and the receiving section 26 receives a call signal from the outside. By doing so, the life of the power supply section 22 can be extended.

As an example, the power supply unit 22 can be a thin card-shaped battery having a structure in which two conductive plastic films are coated with manganese dioxide powder on one side and zinc powder on the other, stacked on top of each other with a non-woven fabric sandwiched between them. Further, as an example, the circuits such as the calculation section 24, the reception section 26, the notification section 28, the transmission section 30, etc. can be configured with a thin IC device, and the ID card 1
Reference numeral 2 can be an IC card in which the IC device is built into a thin plastic card.

The transmitter 30 is a plurality of ID cards 12 that are manufactured.
The notifying unit 28 can transmit a signal to identify itself, such as a different frequency for each unit, and the notifying unit 28
Different types of notification signals can be emitted depending on different types of received signals received at the terminal. for example
When transmitting a call signal to a user in possession of the ID card 12, the tone, frequency, signal cycle, etc. of the signal can be changed depending on the type of call, such as a call signal to a specific room or a call signal to an in-house telephone. What is necessary is to control the output signal to the notification section 28 so that the notification signal is emitted as follows.

FIG. 1 shows an example of an outside air volume control device 10 according to the present invention, in which an antenna (such as a bar antenna) 4 is attached to the ceiling of a room 2 in a building, and ID card 12
A code signal transmitted from the antenna is received by the antenna 4 and supplied to the radio (TRT) 32,
The code signal transmitted from the is transmitted to the local radio control device (LRC) 34,
The code signal transmitted by the radio controller is received by a central radio control unit (CRC) 38 via a local area network (LAN) 36.

The code signal received by the CRC 38 is sent to a central control processor (GP) 40 in the building, where the content of the code signal is determined, and if necessary, a display device (display) 4 is sent.
2 or the printer 44, and the data contents, the air conditioning status of the room to which the code signal was transmitted, the number of people entering the room, etc. are displayed or printed out.

Furthermore, a transmitting device (not shown) is installed in the room 2 in the building. This transmitting device is connected to a radio (TRT) 32 and always transmits a calling signal for the ID card 12. This results in
When a user enters the room, the ID that the user has
The receiving unit 26 of the card 12 receives the calling signal,
A code signal is transmitted from the transmitter 30. This signal is received by the antenna 4 and sent to the processor (GP).
40 to the processor (GP)
40 determines whether a user has entered the room and can determine the number of people in the room based on the number of code signals received. Similarly, the processor (GP) 40 determines that the user is not in the room when no code signal is received.

The CRC 38 receives data from a distributed processing processor (DDP) 46, is connected to an electronic exchange (EPBX) 48, and controls external lines as necessary.

In case of emergency, GP40 or
This is to provide a function that can secure a specific telephone line based on the commands of the DDP 46.

In the GP 40 that has received the code signal, data for air conditioning control for the specific room that received the code signal is transmitted to the air conditioning control unit (building control remote station, (SRS)) 50 via the CRC 38.
will be sent to.

Upon receiving the air conditioning control data, the SRS 50 independently controls an air conditioner (AHU) 52 and a supply air unit 56 provided corresponding to each room in order to control the air conditioning state to correspond to the control data.

The AHU 52 controls fan air volume, motor damper opening (air supply, ventilation), and coil valve opening. MD ₁ to _{MD 3} are motor dampers for fan air volume control.

A temperature/humidity sensor 64 is arranged in each room, and the output of each sensor is relayed to the GP40 via the SRS50.
The temperature and humidity data for each room is input. As a result, the indoor temperature and humidity data before air conditioning and the temperature and humidity data after air conditioning are used as data for air conditioning control.

Next, the control operation of the outside air amount control device according to the present invention will be explained in detail with reference to the control flowchart shown in FIG.

If someone enters a room where the air conditioning should be controlled,
As described above, a code signal for identifying the ID card holder is transmitted from the ID card 12 possessed by the person in the room. Antenna 4 that receives this code signal is installed in the room, so
When one or more ID card holders enter the room,
Different code signals are received by the antenna 4, and these different code signals are transmitted by the TRT 32 to the GP 40 mentioned above.

As a result, the control program starts, and when the TRT 32 receives a specific code signal in step a, the number of people in the room is grasped from this code signal in the GP 40 in step b.

In GP40, from this number of people in the room n, the number of people in the room n
In step c, the opening values of the outside air damper MD ₁ and the return air damper MD ₂ and the air blowing value of the outside air fan OAF are calculated, and the respective control data are sent to the SRS 50. , the SRS50 that has received these control data controls the outside air damper MD ₁ and the return air damper.
The opening adjustment signal is sent to MD ₂ , and each is adjusted to the specified opening.

In addition, the damper installed on the air supply side of AHU52
The opening degree of MD ₃ is fixed. In this way,
The amount of outside air when the number of people in the room is n is the supply air section 5
At the same time, necessary indoor air is taken in from the return air section RA to air-condition the room (step d).

Next, when the number of people in the room changes (increases or decreases), the GP40 detects the disappearance of the previous code signal and the increase in the new code signal, and the new number of people in the room x is immediately calculated by the GP40. (Steps e, f).

Depending on the change in the number of people in the room, in step g, GP40 determines whether the difference between the current number of people in the room x and the previous number of people in the room n is greater than the predetermined number of changes α.
It is checked in step g whether the difference is equal to or less than the predetermined number of fluctuations α, the process moves to step h, the outside air intake remains as it is when the number of people in the room is n, and the process returns to step e.

This is done because there is no need to control the amount of outside air taken in each time there is a slight change in the number of people in the room, and a kind of hysteresis control characteristic is used.

If the amount of outside air intake was controlled each time under these conditions, the air conditioning control system would not be stable, and
This is because there is a possibility that the indoor environmental conditions may be adversely affected.

On the other hand, if the number of changes is greater than or equal to the predetermined number α (increase or decrease in the number of people in the room), the process moves to step i, and the outside air damper corresponding to the number of people in the room x after the change is
Opening control data for MD ₁ and return air damper MD ₂ are sent to the SRS 48, and air flow control data for the outside air fan OAF is sent to the SRS.
48.

As a result, in step i, the outside air damper
M ₁ return air damper MD ₂ and outside air fan OAF
is set to x people in the room, and the amount of outside air is controlled to be for x people (step j). In the next step k, the changed value of the number of people in the room x is substituted for the number of people in the room n.
Thereby, the amount of outside air is changed only when the number of people in the room changes from the number x of people in the room after the change by more than the number of changes α. After performing the above control operations, the process returns to step e. Such an outside air amount control operation is continuously executed to ensure comfortable environmental conditions in the room corresponding to the number of people in the room.

Incidentally, in step g, the following predictive control data may be calculated.

That is, for example, data on the number of people in the room over the past several ten minutes may be stored for several times, and the amount of outside air taken in may be predicted from changes in the current number of people in the room.

In addition, the above-mentioned code signal is coded with data on the presence or absence of cigarettes, and when this code data is input, the control program is changed to further control the above-mentioned outside air intake depending on the number of people involved. You can also.

〔Effect of the invention〕

As explained above, the outside air amount control device according to the present invention grasps the number of people in the room based on the code signal transmitted from the ID card, and sets and controls the amount of outside air according to the number of people in the room. As a result, the following effects can be obtained compared to the conventional method.

First, since the air conditioning is controlled by ascertaining the number of people in the room, the air conditioning can be performed with a certain degree of control accuracy compared to the case where a CO ₂ sensor is used.

Second, since the number of people in the room is determined based on the code signal sent from the ID card, the number of people in the room can be determined more accurately and in real time compared to conventional scheduled control. As a result, a comfortable indoor environment can be ensured at all times.

Third, the amount of outside air taken in is set to an amount according to the number of people in the room, and the set amount of outside air is maintained until the number of people in the room changes by a predetermined value or more. When the amount changes by more than a predetermined value, the amount is changed according to the number of people in the room. Therefore, the amount of outside air is not frequently changed due to a change in the number of people in the room below a predetermined value, the air conditioner is stabilized, and unnecessary air conditioning control is not performed, so energy saving can be achieved.

[Brief explanation of drawings]

Fig. 1 is a system diagram showing an example of the outside air amount control device according to the present invention, Fig. 2 is an explanatory diagram of an ID card, and Fig. 3 is an illustration of an ID card.
The figure is a system diagram of the circuit built into this ID card, and FIG. 4 is a flowchart showing an example of outside air volume control. 4...Antenna, 12...ID card, 32...
... Radio equipment (TRT), 52... Air conditioner (AHU),
RA...Return air section, 56...Supply air section, OAF...Outside air fan.

Claims (1)

[Claims] 1. An ID card that transmits a code signal of the attached user in response to a calling signal, a receiving unit that receives the code signal transmitted from the ID card, and an ID card that transmits the calling signal and based on the received code signal. to determine the number of people in the room and set the amount of outside air taken in by the air conditioner to an amount according to the number of people in the room.
The set amount of outside air is maintained until the number of people in the room changes by more than a predetermined value, and when the number of people in the room changes by more than a predetermined value, the amount of outside air taken in by the air conditioner is set to the number of people in the room. An outside air amount control device comprising: a control unit that changes the amount according to the amount of air;